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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> |
de56a948 | 26 | #include <linux/delay.h> |
66b15db6 | 27 | #include <linux/export.h> |
de56a948 PM |
28 | #include <linux/fs.h> |
29 | #include <linux/anon_inodes.h> | |
07f8ab25 | 30 | #include <linux/cpu.h> |
de56a948 | 31 | #include <linux/cpumask.h> |
aa04b4cc PM |
32 | #include <linux/spinlock.h> |
33 | #include <linux/page-flags.h> | |
2c9097e4 | 34 | #include <linux/srcu.h> |
398a76c6 | 35 | #include <linux/miscdevice.h> |
e23a808b | 36 | #include <linux/debugfs.h> |
de56a948 PM |
37 | |
38 | #include <asm/reg.h> | |
39 | #include <asm/cputable.h> | |
40 | #include <asm/cacheflush.h> | |
41 | #include <asm/tlbflush.h> | |
7c0f6ba6 | 42 | #include <linux/uaccess.h> |
de56a948 PM |
43 | #include <asm/io.h> |
44 | #include <asm/kvm_ppc.h> | |
45 | #include <asm/kvm_book3s.h> | |
46 | #include <asm/mmu_context.h> | |
47 | #include <asm/lppaca.h> | |
48 | #include <asm/processor.h> | |
371fefd6 | 49 | #include <asm/cputhreads.h> |
aa04b4cc | 50 | #include <asm/page.h> |
de1d9248 | 51 | #include <asm/hvcall.h> |
ae3a197e | 52 | #include <asm/switch_to.h> |
512691d4 | 53 | #include <asm/smp.h> |
66feed61 | 54 | #include <asm/dbell.h> |
fd7bacbc | 55 | #include <asm/hmi.h> |
c57875f5 | 56 | #include <asm/pnv-pci.h> |
7a84084c | 57 | #include <asm/mmu.h> |
f725758b PM |
58 | #include <asm/opal.h> |
59 | #include <asm/xics.h> | |
de56a948 | 60 | #include <linux/gfp.h> |
de56a948 PM |
61 | #include <linux/vmalloc.h> |
62 | #include <linux/highmem.h> | |
c77162de | 63 | #include <linux/hugetlb.h> |
c57875f5 SW |
64 | #include <linux/kvm_irqfd.h> |
65 | #include <linux/irqbypass.h> | |
2ba9f0d8 | 66 | #include <linux/module.h> |
7b5f8272 | 67 | #include <linux/compiler.h> |
f725758b | 68 | #include <linux/of.h> |
de56a948 | 69 | |
3a167bea AK |
70 | #include "book3s.h" |
71 | ||
3c78f78a SW |
72 | #define CREATE_TRACE_POINTS |
73 | #include "trace_hv.h" | |
74 | ||
de56a948 PM |
75 | /* #define EXIT_DEBUG */ |
76 | /* #define EXIT_DEBUG_SIMPLE */ | |
77 | /* #define EXIT_DEBUG_INT */ | |
78 | ||
913d3ff9 PM |
79 | /* Used to indicate that a guest page fault needs to be handled */ |
80 | #define RESUME_PAGE_FAULT (RESUME_GUEST | RESUME_FLAG_ARCH1) | |
f7af5209 SW |
81 | /* Used to indicate that a guest passthrough interrupt needs to be handled */ |
82 | #define RESUME_PASSTHROUGH (RESUME_GUEST | RESUME_FLAG_ARCH2) | |
913d3ff9 | 83 | |
c7b67670 PM |
84 | /* Used as a "null" value for timebase values */ |
85 | #define TB_NIL (~(u64)0) | |
86 | ||
699a0ea0 PM |
87 | static DECLARE_BITMAP(default_enabled_hcalls, MAX_HCALL_OPCODE/4 + 1); |
88 | ||
b4deba5c PM |
89 | static int dynamic_mt_modes = 6; |
90 | module_param(dynamic_mt_modes, int, S_IRUGO | S_IWUSR); | |
91 | MODULE_PARM_DESC(dynamic_mt_modes, "Set of allowed dynamic micro-threading modes: 0 (= none), 2, 4, or 6 (= 2 or 4)"); | |
ec257165 PM |
92 | static int target_smt_mode; |
93 | module_param(target_smt_mode, int, S_IRUGO | S_IWUSR); | |
94 | MODULE_PARM_DESC(target_smt_mode, "Target threads per core (0 = max)"); | |
9678cdaa | 95 | |
520fe9c6 SW |
96 | #ifdef CONFIG_KVM_XICS |
97 | static struct kernel_param_ops module_param_ops = { | |
98 | .set = param_set_int, | |
99 | .get = param_get_int, | |
100 | }; | |
101 | ||
644abbb2 SW |
102 | module_param_cb(kvm_irq_bypass, &module_param_ops, &kvm_irq_bypass, |
103 | S_IRUGO | S_IWUSR); | |
104 | MODULE_PARM_DESC(kvm_irq_bypass, "Bypass passthrough interrupt optimization"); | |
105 | ||
520fe9c6 SW |
106 | module_param_cb(h_ipi_redirect, &module_param_ops, &h_ipi_redirect, |
107 | S_IRUGO | S_IWUSR); | |
108 | MODULE_PARM_DESC(h_ipi_redirect, "Redirect H_IPI wakeup to a free host core"); | |
109 | #endif | |
110 | ||
19ccb76a | 111 | static void kvmppc_end_cede(struct kvm_vcpu *vcpu); |
32fad281 | 112 | static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu); |
19ccb76a | 113 | |
7b5f8272 SJS |
114 | static inline struct kvm_vcpu *next_runnable_thread(struct kvmppc_vcore *vc, |
115 | int *ip) | |
116 | { | |
117 | int i = *ip; | |
118 | struct kvm_vcpu *vcpu; | |
119 | ||
120 | while (++i < MAX_SMT_THREADS) { | |
121 | vcpu = READ_ONCE(vc->runnable_threads[i]); | |
122 | if (vcpu) { | |
123 | *ip = i; | |
124 | return vcpu; | |
125 | } | |
126 | } | |
127 | return NULL; | |
128 | } | |
129 | ||
130 | /* Used to traverse the list of runnable threads for a given vcore */ | |
131 | #define for_each_runnable_thread(i, vcpu, vc) \ | |
132 | for (i = -1; (vcpu = next_runnable_thread(vc, &i)); ) | |
133 | ||
66feed61 PM |
134 | static bool kvmppc_ipi_thread(int cpu) |
135 | { | |
1704a81c PM |
136 | unsigned long msg = PPC_DBELL_TYPE(PPC_DBELL_SERVER); |
137 | ||
138 | /* On POWER9 we can use msgsnd to IPI any cpu */ | |
139 | if (cpu_has_feature(CPU_FTR_ARCH_300)) { | |
140 | msg |= get_hard_smp_processor_id(cpu); | |
141 | smp_mb(); | |
142 | __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg)); | |
143 | return true; | |
144 | } | |
145 | ||
66feed61 PM |
146 | /* On POWER8 for IPIs to threads in the same core, use msgsnd */ |
147 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) { | |
148 | preempt_disable(); | |
149 | if (cpu_first_thread_sibling(cpu) == | |
150 | cpu_first_thread_sibling(smp_processor_id())) { | |
66feed61 PM |
151 | msg |= cpu_thread_in_core(cpu); |
152 | smp_mb(); | |
153 | __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg)); | |
154 | preempt_enable(); | |
155 | return true; | |
156 | } | |
157 | preempt_enable(); | |
158 | } | |
159 | ||
160 | #if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP) | |
f725758b PM |
161 | if (cpu >= 0 && cpu < nr_cpu_ids) { |
162 | if (paca[cpu].kvm_hstate.xics_phys) { | |
163 | xics_wake_cpu(cpu); | |
164 | return true; | |
165 | } | |
166 | opal_int_set_mfrr(get_hard_smp_processor_id(cpu), IPI_PRIORITY); | |
66feed61 PM |
167 | return true; |
168 | } | |
169 | #endif | |
170 | ||
171 | return false; | |
172 | } | |
173 | ||
3a167bea | 174 | static void kvmppc_fast_vcpu_kick_hv(struct kvm_vcpu *vcpu) |
54695c30 | 175 | { |
ec257165 | 176 | int cpu; |
8577370f | 177 | struct swait_queue_head *wqp; |
54695c30 BH |
178 | |
179 | wqp = kvm_arch_vcpu_wq(vcpu); | |
8577370f MT |
180 | if (swait_active(wqp)) { |
181 | swake_up(wqp); | |
54695c30 BH |
182 | ++vcpu->stat.halt_wakeup; |
183 | } | |
184 | ||
3deda5e5 PM |
185 | cpu = READ_ONCE(vcpu->arch.thread_cpu); |
186 | if (cpu >= 0 && kvmppc_ipi_thread(cpu)) | |
66feed61 | 187 | return; |
54695c30 BH |
188 | |
189 | /* CPU points to the first thread of the core */ | |
ec257165 | 190 | cpu = vcpu->cpu; |
66feed61 PM |
191 | if (cpu >= 0 && cpu < nr_cpu_ids && cpu_online(cpu)) |
192 | smp_send_reschedule(cpu); | |
54695c30 BH |
193 | } |
194 | ||
c7b67670 PM |
195 | /* |
196 | * We use the vcpu_load/put functions to measure stolen time. | |
197 | * Stolen time is counted as time when either the vcpu is able to | |
198 | * run as part of a virtual core, but the task running the vcore | |
199 | * is preempted or sleeping, or when the vcpu needs something done | |
200 | * in the kernel by the task running the vcpu, but that task is | |
201 | * preempted or sleeping. Those two things have to be counted | |
202 | * separately, since one of the vcpu tasks will take on the job | |
203 | * of running the core, and the other vcpu tasks in the vcore will | |
204 | * sleep waiting for it to do that, but that sleep shouldn't count | |
205 | * as stolen time. | |
206 | * | |
207 | * Hence we accumulate stolen time when the vcpu can run as part of | |
208 | * a vcore using vc->stolen_tb, and the stolen time when the vcpu | |
209 | * needs its task to do other things in the kernel (for example, | |
210 | * service a page fault) in busy_stolen. We don't accumulate | |
211 | * stolen time for a vcore when it is inactive, or for a vcpu | |
212 | * when it is in state RUNNING or NOTREADY. NOTREADY is a bit of | |
213 | * a misnomer; it means that the vcpu task is not executing in | |
214 | * the KVM_VCPU_RUN ioctl, i.e. it is in userspace or elsewhere in | |
215 | * the kernel. We don't have any way of dividing up that time | |
216 | * between time that the vcpu is genuinely stopped, time that | |
217 | * the task is actively working on behalf of the vcpu, and time | |
218 | * that the task is preempted, so we don't count any of it as | |
219 | * stolen. | |
220 | * | |
221 | * Updates to busy_stolen are protected by arch.tbacct_lock; | |
2711e248 PM |
222 | * updates to vc->stolen_tb are protected by the vcore->stoltb_lock |
223 | * lock. The stolen times are measured in units of timebase ticks. | |
224 | * (Note that the != TB_NIL checks below are purely defensive; | |
225 | * they should never fail.) | |
c7b67670 PM |
226 | */ |
227 | ||
ec257165 PM |
228 | static void kvmppc_core_start_stolen(struct kvmppc_vcore *vc) |
229 | { | |
230 | unsigned long flags; | |
231 | ||
232 | spin_lock_irqsave(&vc->stoltb_lock, flags); | |
233 | vc->preempt_tb = mftb(); | |
234 | spin_unlock_irqrestore(&vc->stoltb_lock, flags); | |
235 | } | |
236 | ||
237 | static void kvmppc_core_end_stolen(struct kvmppc_vcore *vc) | |
238 | { | |
239 | unsigned long flags; | |
240 | ||
241 | spin_lock_irqsave(&vc->stoltb_lock, flags); | |
242 | if (vc->preempt_tb != TB_NIL) { | |
243 | vc->stolen_tb += mftb() - vc->preempt_tb; | |
244 | vc->preempt_tb = TB_NIL; | |
245 | } | |
246 | spin_unlock_irqrestore(&vc->stoltb_lock, flags); | |
247 | } | |
248 | ||
3a167bea | 249 | static void kvmppc_core_vcpu_load_hv(struct kvm_vcpu *vcpu, int cpu) |
de56a948 | 250 | { |
0456ec4f | 251 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
bf3d32e1 | 252 | unsigned long flags; |
0456ec4f | 253 | |
2711e248 PM |
254 | /* |
255 | * We can test vc->runner without taking the vcore lock, | |
256 | * because only this task ever sets vc->runner to this | |
257 | * vcpu, and once it is set to this vcpu, only this task | |
258 | * ever sets it to NULL. | |
259 | */ | |
ec257165 PM |
260 | if (vc->runner == vcpu && vc->vcore_state >= VCORE_SLEEPING) |
261 | kvmppc_core_end_stolen(vc); | |
262 | ||
2711e248 | 263 | spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags); |
c7b67670 PM |
264 | if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST && |
265 | vcpu->arch.busy_preempt != TB_NIL) { | |
266 | vcpu->arch.busy_stolen += mftb() - vcpu->arch.busy_preempt; | |
267 | vcpu->arch.busy_preempt = TB_NIL; | |
268 | } | |
bf3d32e1 | 269 | spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags); |
de56a948 PM |
270 | } |
271 | ||
3a167bea | 272 | static void kvmppc_core_vcpu_put_hv(struct kvm_vcpu *vcpu) |
de56a948 | 273 | { |
0456ec4f | 274 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
bf3d32e1 | 275 | unsigned long flags; |
0456ec4f | 276 | |
ec257165 PM |
277 | if (vc->runner == vcpu && vc->vcore_state >= VCORE_SLEEPING) |
278 | kvmppc_core_start_stolen(vc); | |
279 | ||
2711e248 | 280 | spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags); |
c7b67670 PM |
281 | if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST) |
282 | vcpu->arch.busy_preempt = mftb(); | |
bf3d32e1 | 283 | spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags); |
de56a948 PM |
284 | } |
285 | ||
3a167bea | 286 | static void kvmppc_set_msr_hv(struct kvm_vcpu *vcpu, u64 msr) |
de56a948 | 287 | { |
c20875a3 PM |
288 | /* |
289 | * Check for illegal transactional state bit combination | |
290 | * and if we find it, force the TS field to a safe state. | |
291 | */ | |
292 | if ((msr & MSR_TS_MASK) == MSR_TS_MASK) | |
293 | msr &= ~MSR_TS_MASK; | |
de56a948 | 294 | vcpu->arch.shregs.msr = msr; |
19ccb76a | 295 | kvmppc_end_cede(vcpu); |
de56a948 PM |
296 | } |
297 | ||
5358a963 | 298 | static void kvmppc_set_pvr_hv(struct kvm_vcpu *vcpu, u32 pvr) |
de56a948 PM |
299 | { |
300 | vcpu->arch.pvr = pvr; | |
301 | } | |
302 | ||
2ee13be3 SJS |
303 | /* Dummy value used in computing PCR value below */ |
304 | #define PCR_ARCH_300 (PCR_ARCH_207 << 1) | |
305 | ||
5358a963 | 306 | static int kvmppc_set_arch_compat(struct kvm_vcpu *vcpu, u32 arch_compat) |
388cc6e1 | 307 | { |
2ee13be3 | 308 | unsigned long host_pcr_bit = 0, guest_pcr_bit = 0; |
388cc6e1 PM |
309 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
310 | ||
2ee13be3 SJS |
311 | /* We can (emulate) our own architecture version and anything older */ |
312 | if (cpu_has_feature(CPU_FTR_ARCH_300)) | |
313 | host_pcr_bit = PCR_ARCH_300; | |
314 | else if (cpu_has_feature(CPU_FTR_ARCH_207S)) | |
315 | host_pcr_bit = PCR_ARCH_207; | |
316 | else if (cpu_has_feature(CPU_FTR_ARCH_206)) | |
317 | host_pcr_bit = PCR_ARCH_206; | |
318 | else | |
319 | host_pcr_bit = PCR_ARCH_205; | |
320 | ||
321 | /* Determine lowest PCR bit needed to run guest in given PVR level */ | |
322 | guest_pcr_bit = host_pcr_bit; | |
388cc6e1 | 323 | if (arch_compat) { |
388cc6e1 PM |
324 | switch (arch_compat) { |
325 | case PVR_ARCH_205: | |
2ee13be3 | 326 | guest_pcr_bit = PCR_ARCH_205; |
388cc6e1 PM |
327 | break; |
328 | case PVR_ARCH_206: | |
329 | case PVR_ARCH_206p: | |
2ee13be3 | 330 | guest_pcr_bit = PCR_ARCH_206; |
5557ae0e PM |
331 | break; |
332 | case PVR_ARCH_207: | |
2ee13be3 SJS |
333 | guest_pcr_bit = PCR_ARCH_207; |
334 | break; | |
335 | case PVR_ARCH_300: | |
336 | guest_pcr_bit = PCR_ARCH_300; | |
388cc6e1 PM |
337 | break; |
338 | default: | |
339 | return -EINVAL; | |
340 | } | |
341 | } | |
342 | ||
2ee13be3 SJS |
343 | /* Check requested PCR bits don't exceed our capabilities */ |
344 | if (guest_pcr_bit > host_pcr_bit) | |
345 | return -EINVAL; | |
346 | ||
388cc6e1 PM |
347 | spin_lock(&vc->lock); |
348 | vc->arch_compat = arch_compat; | |
2ee13be3 SJS |
349 | /* Set all PCR bits for which guest_pcr_bit <= bit < host_pcr_bit */ |
350 | vc->pcr = host_pcr_bit - guest_pcr_bit; | |
388cc6e1 PM |
351 | spin_unlock(&vc->lock); |
352 | ||
353 | return 0; | |
354 | } | |
355 | ||
5358a963 | 356 | static void kvmppc_dump_regs(struct kvm_vcpu *vcpu) |
de56a948 PM |
357 | { |
358 | int r; | |
359 | ||
360 | pr_err("vcpu %p (%d):\n", vcpu, vcpu->vcpu_id); | |
361 | pr_err("pc = %.16lx msr = %.16llx trap = %x\n", | |
362 | vcpu->arch.pc, vcpu->arch.shregs.msr, vcpu->arch.trap); | |
363 | for (r = 0; r < 16; ++r) | |
364 | pr_err("r%2d = %.16lx r%d = %.16lx\n", | |
365 | r, kvmppc_get_gpr(vcpu, r), | |
366 | r+16, kvmppc_get_gpr(vcpu, r+16)); | |
367 | pr_err("ctr = %.16lx lr = %.16lx\n", | |
368 | vcpu->arch.ctr, vcpu->arch.lr); | |
369 | pr_err("srr0 = %.16llx srr1 = %.16llx\n", | |
370 | vcpu->arch.shregs.srr0, vcpu->arch.shregs.srr1); | |
371 | pr_err("sprg0 = %.16llx sprg1 = %.16llx\n", | |
372 | vcpu->arch.shregs.sprg0, vcpu->arch.shregs.sprg1); | |
373 | pr_err("sprg2 = %.16llx sprg3 = %.16llx\n", | |
374 | vcpu->arch.shregs.sprg2, vcpu->arch.shregs.sprg3); | |
375 | pr_err("cr = %.8x xer = %.16lx dsisr = %.8x\n", | |
376 | vcpu->arch.cr, vcpu->arch.xer, vcpu->arch.shregs.dsisr); | |
377 | pr_err("dar = %.16llx\n", vcpu->arch.shregs.dar); | |
378 | pr_err("fault dar = %.16lx dsisr = %.8x\n", | |
379 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); | |
380 | pr_err("SLB (%d entries):\n", vcpu->arch.slb_max); | |
381 | for (r = 0; r < vcpu->arch.slb_max; ++r) | |
382 | pr_err(" ESID = %.16llx VSID = %.16llx\n", | |
383 | vcpu->arch.slb[r].orige, vcpu->arch.slb[r].origv); | |
384 | pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n", | |
a0144e2a | 385 | vcpu->arch.vcore->lpcr, vcpu->kvm->arch.sdr1, |
de56a948 PM |
386 | vcpu->arch.last_inst); |
387 | } | |
388 | ||
5358a963 | 389 | static struct kvm_vcpu *kvmppc_find_vcpu(struct kvm *kvm, int id) |
a8606e20 | 390 | { |
e09fefde | 391 | struct kvm_vcpu *ret; |
a8606e20 PM |
392 | |
393 | mutex_lock(&kvm->lock); | |
e09fefde | 394 | ret = kvm_get_vcpu_by_id(kvm, id); |
a8606e20 PM |
395 | mutex_unlock(&kvm->lock); |
396 | return ret; | |
397 | } | |
398 | ||
399 | static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa) | |
400 | { | |
f13c13a0 | 401 | vpa->__old_status |= LPPACA_OLD_SHARED_PROC; |
02407552 | 402 | vpa->yield_count = cpu_to_be32(1); |
a8606e20 PM |
403 | } |
404 | ||
55b665b0 PM |
405 | static int set_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *v, |
406 | unsigned long addr, unsigned long len) | |
407 | { | |
408 | /* check address is cacheline aligned */ | |
409 | if (addr & (L1_CACHE_BYTES - 1)) | |
410 | return -EINVAL; | |
411 | spin_lock(&vcpu->arch.vpa_update_lock); | |
412 | if (v->next_gpa != addr || v->len != len) { | |
413 | v->next_gpa = addr; | |
414 | v->len = addr ? len : 0; | |
415 | v->update_pending = 1; | |
416 | } | |
417 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
418 | return 0; | |
419 | } | |
420 | ||
2e25aa5f PM |
421 | /* Length for a per-processor buffer is passed in at offset 4 in the buffer */ |
422 | struct reg_vpa { | |
423 | u32 dummy; | |
424 | union { | |
02407552 AG |
425 | __be16 hword; |
426 | __be32 word; | |
2e25aa5f PM |
427 | } length; |
428 | }; | |
429 | ||
430 | static int vpa_is_registered(struct kvmppc_vpa *vpap) | |
431 | { | |
432 | if (vpap->update_pending) | |
433 | return vpap->next_gpa != 0; | |
434 | return vpap->pinned_addr != NULL; | |
435 | } | |
436 | ||
a8606e20 PM |
437 | static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu, |
438 | unsigned long flags, | |
439 | unsigned long vcpuid, unsigned long vpa) | |
440 | { | |
441 | struct kvm *kvm = vcpu->kvm; | |
93e60249 | 442 | unsigned long len, nb; |
a8606e20 PM |
443 | void *va; |
444 | struct kvm_vcpu *tvcpu; | |
2e25aa5f PM |
445 | int err; |
446 | int subfunc; | |
447 | struct kvmppc_vpa *vpap; | |
a8606e20 PM |
448 | |
449 | tvcpu = kvmppc_find_vcpu(kvm, vcpuid); | |
450 | if (!tvcpu) | |
451 | return H_PARAMETER; | |
452 | ||
2e25aa5f PM |
453 | subfunc = (flags >> H_VPA_FUNC_SHIFT) & H_VPA_FUNC_MASK; |
454 | if (subfunc == H_VPA_REG_VPA || subfunc == H_VPA_REG_DTL || | |
455 | subfunc == H_VPA_REG_SLB) { | |
456 | /* Registering new area - address must be cache-line aligned */ | |
457 | if ((vpa & (L1_CACHE_BYTES - 1)) || !vpa) | |
a8606e20 | 458 | return H_PARAMETER; |
2e25aa5f PM |
459 | |
460 | /* convert logical addr to kernel addr and read length */ | |
93e60249 PM |
461 | va = kvmppc_pin_guest_page(kvm, vpa, &nb); |
462 | if (va == NULL) | |
b2b2f165 | 463 | return H_PARAMETER; |
2e25aa5f | 464 | if (subfunc == H_VPA_REG_VPA) |
02407552 | 465 | len = be16_to_cpu(((struct reg_vpa *)va)->length.hword); |
a8606e20 | 466 | else |
02407552 | 467 | len = be32_to_cpu(((struct reg_vpa *)va)->length.word); |
c35635ef | 468 | kvmppc_unpin_guest_page(kvm, va, vpa, false); |
2e25aa5f PM |
469 | |
470 | /* Check length */ | |
471 | if (len > nb || len < sizeof(struct reg_vpa)) | |
472 | return H_PARAMETER; | |
473 | } else { | |
474 | vpa = 0; | |
475 | len = 0; | |
476 | } | |
477 | ||
478 | err = H_PARAMETER; | |
479 | vpap = NULL; | |
480 | spin_lock(&tvcpu->arch.vpa_update_lock); | |
481 | ||
482 | switch (subfunc) { | |
483 | case H_VPA_REG_VPA: /* register VPA */ | |
484 | if (len < sizeof(struct lppaca)) | |
a8606e20 | 485 | break; |
2e25aa5f PM |
486 | vpap = &tvcpu->arch.vpa; |
487 | err = 0; | |
488 | break; | |
489 | ||
490 | case H_VPA_REG_DTL: /* register DTL */ | |
491 | if (len < sizeof(struct dtl_entry)) | |
a8606e20 | 492 | break; |
2e25aa5f PM |
493 | len -= len % sizeof(struct dtl_entry); |
494 | ||
495 | /* Check that they have previously registered a VPA */ | |
496 | err = H_RESOURCE; | |
497 | if (!vpa_is_registered(&tvcpu->arch.vpa)) | |
a8606e20 | 498 | break; |
2e25aa5f PM |
499 | |
500 | vpap = &tvcpu->arch.dtl; | |
501 | err = 0; | |
502 | break; | |
503 | ||
504 | case H_VPA_REG_SLB: /* register SLB shadow buffer */ | |
505 | /* Check that they have previously registered a VPA */ | |
506 | err = H_RESOURCE; | |
507 | if (!vpa_is_registered(&tvcpu->arch.vpa)) | |
a8606e20 | 508 | break; |
2e25aa5f PM |
509 | |
510 | vpap = &tvcpu->arch.slb_shadow; | |
511 | err = 0; | |
512 | break; | |
513 | ||
514 | case H_VPA_DEREG_VPA: /* deregister VPA */ | |
515 | /* Check they don't still have a DTL or SLB buf registered */ | |
516 | err = H_RESOURCE; | |
517 | if (vpa_is_registered(&tvcpu->arch.dtl) || | |
518 | vpa_is_registered(&tvcpu->arch.slb_shadow)) | |
a8606e20 | 519 | break; |
2e25aa5f PM |
520 | |
521 | vpap = &tvcpu->arch.vpa; | |
522 | err = 0; | |
523 | break; | |
524 | ||
525 | case H_VPA_DEREG_DTL: /* deregister DTL */ | |
526 | vpap = &tvcpu->arch.dtl; | |
527 | err = 0; | |
528 | break; | |
529 | ||
530 | case H_VPA_DEREG_SLB: /* deregister SLB shadow buffer */ | |
531 | vpap = &tvcpu->arch.slb_shadow; | |
532 | err = 0; | |
533 | break; | |
534 | } | |
535 | ||
536 | if (vpap) { | |
537 | vpap->next_gpa = vpa; | |
538 | vpap->len = len; | |
539 | vpap->update_pending = 1; | |
a8606e20 | 540 | } |
93e60249 | 541 | |
2e25aa5f PM |
542 | spin_unlock(&tvcpu->arch.vpa_update_lock); |
543 | ||
93e60249 | 544 | return err; |
a8606e20 PM |
545 | } |
546 | ||
081f323b | 547 | static void kvmppc_update_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *vpap) |
2e25aa5f | 548 | { |
081f323b | 549 | struct kvm *kvm = vcpu->kvm; |
2e25aa5f PM |
550 | void *va; |
551 | unsigned long nb; | |
081f323b | 552 | unsigned long gpa; |
2e25aa5f | 553 | |
081f323b PM |
554 | /* |
555 | * We need to pin the page pointed to by vpap->next_gpa, | |
556 | * but we can't call kvmppc_pin_guest_page under the lock | |
557 | * as it does get_user_pages() and down_read(). So we | |
558 | * have to drop the lock, pin the page, then get the lock | |
559 | * again and check that a new area didn't get registered | |
560 | * in the meantime. | |
561 | */ | |
562 | for (;;) { | |
563 | gpa = vpap->next_gpa; | |
564 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
565 | va = NULL; | |
566 | nb = 0; | |
567 | if (gpa) | |
c35635ef | 568 | va = kvmppc_pin_guest_page(kvm, gpa, &nb); |
081f323b PM |
569 | spin_lock(&vcpu->arch.vpa_update_lock); |
570 | if (gpa == vpap->next_gpa) | |
571 | break; | |
572 | /* sigh... unpin that one and try again */ | |
573 | if (va) | |
c35635ef | 574 | kvmppc_unpin_guest_page(kvm, va, gpa, false); |
081f323b PM |
575 | } |
576 | ||
577 | vpap->update_pending = 0; | |
578 | if (va && nb < vpap->len) { | |
579 | /* | |
580 | * If it's now too short, it must be that userspace | |
581 | * has changed the mappings underlying guest memory, | |
582 | * so unregister the region. | |
583 | */ | |
c35635ef | 584 | kvmppc_unpin_guest_page(kvm, va, gpa, false); |
081f323b | 585 | va = NULL; |
2e25aa5f PM |
586 | } |
587 | if (vpap->pinned_addr) | |
c35635ef PM |
588 | kvmppc_unpin_guest_page(kvm, vpap->pinned_addr, vpap->gpa, |
589 | vpap->dirty); | |
590 | vpap->gpa = gpa; | |
2e25aa5f | 591 | vpap->pinned_addr = va; |
c35635ef | 592 | vpap->dirty = false; |
2e25aa5f PM |
593 | if (va) |
594 | vpap->pinned_end = va + vpap->len; | |
595 | } | |
596 | ||
597 | static void kvmppc_update_vpas(struct kvm_vcpu *vcpu) | |
598 | { | |
2f12f034 PM |
599 | if (!(vcpu->arch.vpa.update_pending || |
600 | vcpu->arch.slb_shadow.update_pending || | |
601 | vcpu->arch.dtl.update_pending)) | |
602 | return; | |
603 | ||
2e25aa5f PM |
604 | spin_lock(&vcpu->arch.vpa_update_lock); |
605 | if (vcpu->arch.vpa.update_pending) { | |
081f323b | 606 | kvmppc_update_vpa(vcpu, &vcpu->arch.vpa); |
55b665b0 PM |
607 | if (vcpu->arch.vpa.pinned_addr) |
608 | init_vpa(vcpu, vcpu->arch.vpa.pinned_addr); | |
2e25aa5f PM |
609 | } |
610 | if (vcpu->arch.dtl.update_pending) { | |
081f323b | 611 | kvmppc_update_vpa(vcpu, &vcpu->arch.dtl); |
2e25aa5f PM |
612 | vcpu->arch.dtl_ptr = vcpu->arch.dtl.pinned_addr; |
613 | vcpu->arch.dtl_index = 0; | |
614 | } | |
615 | if (vcpu->arch.slb_shadow.update_pending) | |
081f323b | 616 | kvmppc_update_vpa(vcpu, &vcpu->arch.slb_shadow); |
2e25aa5f PM |
617 | spin_unlock(&vcpu->arch.vpa_update_lock); |
618 | } | |
619 | ||
c7b67670 PM |
620 | /* |
621 | * Return the accumulated stolen time for the vcore up until `now'. | |
622 | * The caller should hold the vcore lock. | |
623 | */ | |
624 | static u64 vcore_stolen_time(struct kvmppc_vcore *vc, u64 now) | |
625 | { | |
626 | u64 p; | |
2711e248 | 627 | unsigned long flags; |
c7b67670 | 628 | |
2711e248 PM |
629 | spin_lock_irqsave(&vc->stoltb_lock, flags); |
630 | p = vc->stolen_tb; | |
c7b67670 | 631 | if (vc->vcore_state != VCORE_INACTIVE && |
2711e248 PM |
632 | vc->preempt_tb != TB_NIL) |
633 | p += now - vc->preempt_tb; | |
634 | spin_unlock_irqrestore(&vc->stoltb_lock, flags); | |
c7b67670 PM |
635 | return p; |
636 | } | |
637 | ||
0456ec4f PM |
638 | static void kvmppc_create_dtl_entry(struct kvm_vcpu *vcpu, |
639 | struct kvmppc_vcore *vc) | |
640 | { | |
641 | struct dtl_entry *dt; | |
642 | struct lppaca *vpa; | |
c7b67670 PM |
643 | unsigned long stolen; |
644 | unsigned long core_stolen; | |
645 | u64 now; | |
0456ec4f PM |
646 | |
647 | dt = vcpu->arch.dtl_ptr; | |
648 | vpa = vcpu->arch.vpa.pinned_addr; | |
c7b67670 PM |
649 | now = mftb(); |
650 | core_stolen = vcore_stolen_time(vc, now); | |
651 | stolen = core_stolen - vcpu->arch.stolen_logged; | |
652 | vcpu->arch.stolen_logged = core_stolen; | |
bf3d32e1 | 653 | spin_lock_irq(&vcpu->arch.tbacct_lock); |
c7b67670 PM |
654 | stolen += vcpu->arch.busy_stolen; |
655 | vcpu->arch.busy_stolen = 0; | |
bf3d32e1 | 656 | spin_unlock_irq(&vcpu->arch.tbacct_lock); |
0456ec4f PM |
657 | if (!dt || !vpa) |
658 | return; | |
659 | memset(dt, 0, sizeof(struct dtl_entry)); | |
660 | dt->dispatch_reason = 7; | |
02407552 AG |
661 | dt->processor_id = cpu_to_be16(vc->pcpu + vcpu->arch.ptid); |
662 | dt->timebase = cpu_to_be64(now + vc->tb_offset); | |
663 | dt->enqueue_to_dispatch_time = cpu_to_be32(stolen); | |
664 | dt->srr0 = cpu_to_be64(kvmppc_get_pc(vcpu)); | |
665 | dt->srr1 = cpu_to_be64(vcpu->arch.shregs.msr); | |
0456ec4f PM |
666 | ++dt; |
667 | if (dt == vcpu->arch.dtl.pinned_end) | |
668 | dt = vcpu->arch.dtl.pinned_addr; | |
669 | vcpu->arch.dtl_ptr = dt; | |
670 | /* order writing *dt vs. writing vpa->dtl_idx */ | |
671 | smp_wmb(); | |
02407552 | 672 | vpa->dtl_idx = cpu_to_be64(++vcpu->arch.dtl_index); |
c35635ef | 673 | vcpu->arch.dtl.dirty = true; |
0456ec4f PM |
674 | } |
675 | ||
9642382e MN |
676 | static bool kvmppc_power8_compatible(struct kvm_vcpu *vcpu) |
677 | { | |
678 | if (vcpu->arch.vcore->arch_compat >= PVR_ARCH_207) | |
679 | return true; | |
680 | if ((!vcpu->arch.vcore->arch_compat) && | |
681 | cpu_has_feature(CPU_FTR_ARCH_207S)) | |
682 | return true; | |
683 | return false; | |
684 | } | |
685 | ||
686 | static int kvmppc_h_set_mode(struct kvm_vcpu *vcpu, unsigned long mflags, | |
687 | unsigned long resource, unsigned long value1, | |
688 | unsigned long value2) | |
689 | { | |
690 | switch (resource) { | |
691 | case H_SET_MODE_RESOURCE_SET_CIABR: | |
692 | if (!kvmppc_power8_compatible(vcpu)) | |
693 | return H_P2; | |
694 | if (value2) | |
695 | return H_P4; | |
696 | if (mflags) | |
697 | return H_UNSUPPORTED_FLAG_START; | |
698 | /* Guests can't breakpoint the hypervisor */ | |
699 | if ((value1 & CIABR_PRIV) == CIABR_PRIV_HYPER) | |
700 | return H_P3; | |
701 | vcpu->arch.ciabr = value1; | |
702 | return H_SUCCESS; | |
703 | case H_SET_MODE_RESOURCE_SET_DAWR: | |
704 | if (!kvmppc_power8_compatible(vcpu)) | |
705 | return H_P2; | |
706 | if (mflags) | |
707 | return H_UNSUPPORTED_FLAG_START; | |
708 | if (value2 & DABRX_HYP) | |
709 | return H_P4; | |
710 | vcpu->arch.dawr = value1; | |
711 | vcpu->arch.dawrx = value2; | |
712 | return H_SUCCESS; | |
713 | default: | |
714 | return H_TOO_HARD; | |
715 | } | |
716 | } | |
717 | ||
90fd09f8 SB |
718 | static int kvm_arch_vcpu_yield_to(struct kvm_vcpu *target) |
719 | { | |
720 | struct kvmppc_vcore *vcore = target->arch.vcore; | |
721 | ||
722 | /* | |
723 | * We expect to have been called by the real mode handler | |
724 | * (kvmppc_rm_h_confer()) which would have directly returned | |
725 | * H_SUCCESS if the source vcore wasn't idle (e.g. if it may | |
726 | * have useful work to do and should not confer) so we don't | |
727 | * recheck that here. | |
728 | */ | |
729 | ||
730 | spin_lock(&vcore->lock); | |
731 | if (target->arch.state == KVMPPC_VCPU_RUNNABLE && | |
ec257165 PM |
732 | vcore->vcore_state != VCORE_INACTIVE && |
733 | vcore->runner) | |
90fd09f8 SB |
734 | target = vcore->runner; |
735 | spin_unlock(&vcore->lock); | |
736 | ||
737 | return kvm_vcpu_yield_to(target); | |
738 | } | |
739 | ||
740 | static int kvmppc_get_yield_count(struct kvm_vcpu *vcpu) | |
741 | { | |
742 | int yield_count = 0; | |
743 | struct lppaca *lppaca; | |
744 | ||
745 | spin_lock(&vcpu->arch.vpa_update_lock); | |
746 | lppaca = (struct lppaca *)vcpu->arch.vpa.pinned_addr; | |
747 | if (lppaca) | |
ecb6d618 | 748 | yield_count = be32_to_cpu(lppaca->yield_count); |
90fd09f8 SB |
749 | spin_unlock(&vcpu->arch.vpa_update_lock); |
750 | return yield_count; | |
751 | } | |
752 | ||
a8606e20 PM |
753 | int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu) |
754 | { | |
755 | unsigned long req = kvmppc_get_gpr(vcpu, 3); | |
756 | unsigned long target, ret = H_SUCCESS; | |
90fd09f8 | 757 | int yield_count; |
a8606e20 | 758 | struct kvm_vcpu *tvcpu; |
8e591cb7 | 759 | int idx, rc; |
a8606e20 | 760 | |
699a0ea0 PM |
761 | if (req <= MAX_HCALL_OPCODE && |
762 | !test_bit(req/4, vcpu->kvm->arch.enabled_hcalls)) | |
763 | return RESUME_HOST; | |
764 | ||
a8606e20 PM |
765 | switch (req) { |
766 | case H_CEDE: | |
a8606e20 PM |
767 | break; |
768 | case H_PROD: | |
769 | target = kvmppc_get_gpr(vcpu, 4); | |
770 | tvcpu = kvmppc_find_vcpu(vcpu->kvm, target); | |
771 | if (!tvcpu) { | |
772 | ret = H_PARAMETER; | |
773 | break; | |
774 | } | |
775 | tvcpu->arch.prodded = 1; | |
776 | smp_mb(); | |
8464c884 PM |
777 | if (tvcpu->arch.ceded) |
778 | kvmppc_fast_vcpu_kick_hv(tvcpu); | |
a8606e20 PM |
779 | break; |
780 | case H_CONFER: | |
42d7604d PM |
781 | target = kvmppc_get_gpr(vcpu, 4); |
782 | if (target == -1) | |
783 | break; | |
784 | tvcpu = kvmppc_find_vcpu(vcpu->kvm, target); | |
785 | if (!tvcpu) { | |
786 | ret = H_PARAMETER; | |
787 | break; | |
788 | } | |
90fd09f8 SB |
789 | yield_count = kvmppc_get_gpr(vcpu, 5); |
790 | if (kvmppc_get_yield_count(tvcpu) != yield_count) | |
791 | break; | |
792 | kvm_arch_vcpu_yield_to(tvcpu); | |
a8606e20 PM |
793 | break; |
794 | case H_REGISTER_VPA: | |
795 | ret = do_h_register_vpa(vcpu, kvmppc_get_gpr(vcpu, 4), | |
796 | kvmppc_get_gpr(vcpu, 5), | |
797 | kvmppc_get_gpr(vcpu, 6)); | |
798 | break; | |
8e591cb7 ME |
799 | case H_RTAS: |
800 | if (list_empty(&vcpu->kvm->arch.rtas_tokens)) | |
801 | return RESUME_HOST; | |
802 | ||
c9438092 | 803 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
8e591cb7 | 804 | rc = kvmppc_rtas_hcall(vcpu); |
c9438092 | 805 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
8e591cb7 ME |
806 | |
807 | if (rc == -ENOENT) | |
808 | return RESUME_HOST; | |
809 | else if (rc == 0) | |
810 | break; | |
811 | ||
812 | /* Send the error out to userspace via KVM_RUN */ | |
813 | return rc; | |
99342cf8 DG |
814 | case H_LOGICAL_CI_LOAD: |
815 | ret = kvmppc_h_logical_ci_load(vcpu); | |
816 | if (ret == H_TOO_HARD) | |
817 | return RESUME_HOST; | |
818 | break; | |
819 | case H_LOGICAL_CI_STORE: | |
820 | ret = kvmppc_h_logical_ci_store(vcpu); | |
821 | if (ret == H_TOO_HARD) | |
822 | return RESUME_HOST; | |
823 | break; | |
9642382e MN |
824 | case H_SET_MODE: |
825 | ret = kvmppc_h_set_mode(vcpu, kvmppc_get_gpr(vcpu, 4), | |
826 | kvmppc_get_gpr(vcpu, 5), | |
827 | kvmppc_get_gpr(vcpu, 6), | |
828 | kvmppc_get_gpr(vcpu, 7)); | |
829 | if (ret == H_TOO_HARD) | |
830 | return RESUME_HOST; | |
831 | break; | |
bc5ad3f3 BH |
832 | case H_XIRR: |
833 | case H_CPPR: | |
834 | case H_EOI: | |
835 | case H_IPI: | |
8e44ddc3 PM |
836 | case H_IPOLL: |
837 | case H_XIRR_X: | |
bc5ad3f3 BH |
838 | if (kvmppc_xics_enabled(vcpu)) { |
839 | ret = kvmppc_xics_hcall(vcpu, req); | |
840 | break; | |
d3695aa4 AK |
841 | } |
842 | return RESUME_HOST; | |
843 | case H_PUT_TCE: | |
844 | ret = kvmppc_h_put_tce(vcpu, kvmppc_get_gpr(vcpu, 4), | |
845 | kvmppc_get_gpr(vcpu, 5), | |
846 | kvmppc_get_gpr(vcpu, 6)); | |
847 | if (ret == H_TOO_HARD) | |
848 | return RESUME_HOST; | |
849 | break; | |
850 | case H_PUT_TCE_INDIRECT: | |
851 | ret = kvmppc_h_put_tce_indirect(vcpu, kvmppc_get_gpr(vcpu, 4), | |
852 | kvmppc_get_gpr(vcpu, 5), | |
853 | kvmppc_get_gpr(vcpu, 6), | |
854 | kvmppc_get_gpr(vcpu, 7)); | |
855 | if (ret == H_TOO_HARD) | |
856 | return RESUME_HOST; | |
857 | break; | |
858 | case H_STUFF_TCE: | |
859 | ret = kvmppc_h_stuff_tce(vcpu, kvmppc_get_gpr(vcpu, 4), | |
860 | kvmppc_get_gpr(vcpu, 5), | |
861 | kvmppc_get_gpr(vcpu, 6), | |
862 | kvmppc_get_gpr(vcpu, 7)); | |
863 | if (ret == H_TOO_HARD) | |
864 | return RESUME_HOST; | |
865 | break; | |
a8606e20 PM |
866 | default: |
867 | return RESUME_HOST; | |
868 | } | |
869 | kvmppc_set_gpr(vcpu, 3, ret); | |
870 | vcpu->arch.hcall_needed = 0; | |
871 | return RESUME_GUEST; | |
872 | } | |
873 | ||
ae2113a4 PM |
874 | static int kvmppc_hcall_impl_hv(unsigned long cmd) |
875 | { | |
876 | switch (cmd) { | |
877 | case H_CEDE: | |
878 | case H_PROD: | |
879 | case H_CONFER: | |
880 | case H_REGISTER_VPA: | |
9642382e | 881 | case H_SET_MODE: |
99342cf8 DG |
882 | case H_LOGICAL_CI_LOAD: |
883 | case H_LOGICAL_CI_STORE: | |
ae2113a4 PM |
884 | #ifdef CONFIG_KVM_XICS |
885 | case H_XIRR: | |
886 | case H_CPPR: | |
887 | case H_EOI: | |
888 | case H_IPI: | |
889 | case H_IPOLL: | |
890 | case H_XIRR_X: | |
891 | #endif | |
892 | return 1; | |
893 | } | |
894 | ||
895 | /* See if it's in the real-mode table */ | |
896 | return kvmppc_hcall_impl_hv_realmode(cmd); | |
897 | } | |
898 | ||
a59c1d9e MS |
899 | static int kvmppc_emulate_debug_inst(struct kvm_run *run, |
900 | struct kvm_vcpu *vcpu) | |
901 | { | |
902 | u32 last_inst; | |
903 | ||
904 | if (kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst) != | |
905 | EMULATE_DONE) { | |
906 | /* | |
907 | * Fetch failed, so return to guest and | |
908 | * try executing it again. | |
909 | */ | |
910 | return RESUME_GUEST; | |
911 | } | |
912 | ||
913 | if (last_inst == KVMPPC_INST_SW_BREAKPOINT) { | |
914 | run->exit_reason = KVM_EXIT_DEBUG; | |
915 | run->debug.arch.address = kvmppc_get_pc(vcpu); | |
916 | return RESUME_HOST; | |
917 | } else { | |
918 | kvmppc_core_queue_program(vcpu, SRR1_PROGILL); | |
919 | return RESUME_GUEST; | |
920 | } | |
921 | } | |
922 | ||
3a167bea AK |
923 | static int kvmppc_handle_exit_hv(struct kvm_run *run, struct kvm_vcpu *vcpu, |
924 | struct task_struct *tsk) | |
de56a948 PM |
925 | { |
926 | int r = RESUME_HOST; | |
927 | ||
928 | vcpu->stat.sum_exits++; | |
929 | ||
1c9e3d51 PM |
930 | /* |
931 | * This can happen if an interrupt occurs in the last stages | |
932 | * of guest entry or the first stages of guest exit (i.e. after | |
933 | * setting paca->kvm_hstate.in_guest to KVM_GUEST_MODE_GUEST_HV | |
934 | * and before setting it to KVM_GUEST_MODE_HOST_HV). | |
935 | * That can happen due to a bug, or due to a machine check | |
936 | * occurring at just the wrong time. | |
937 | */ | |
938 | if (vcpu->arch.shregs.msr & MSR_HV) { | |
939 | printk(KERN_EMERG "KVM trap in HV mode!\n"); | |
940 | printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n", | |
941 | vcpu->arch.trap, kvmppc_get_pc(vcpu), | |
942 | vcpu->arch.shregs.msr); | |
943 | kvmppc_dump_regs(vcpu); | |
944 | run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
945 | run->hw.hardware_exit_reason = vcpu->arch.trap; | |
946 | return RESUME_HOST; | |
947 | } | |
de56a948 PM |
948 | run->exit_reason = KVM_EXIT_UNKNOWN; |
949 | run->ready_for_interrupt_injection = 1; | |
950 | switch (vcpu->arch.trap) { | |
951 | /* We're good on these - the host merely wanted to get our attention */ | |
952 | case BOOK3S_INTERRUPT_HV_DECREMENTER: | |
953 | vcpu->stat.dec_exits++; | |
954 | r = RESUME_GUEST; | |
955 | break; | |
956 | case BOOK3S_INTERRUPT_EXTERNAL: | |
5d00f66b | 957 | case BOOK3S_INTERRUPT_H_DOORBELL: |
84f7139c | 958 | case BOOK3S_INTERRUPT_H_VIRT: |
de56a948 PM |
959 | vcpu->stat.ext_intr_exits++; |
960 | r = RESUME_GUEST; | |
961 | break; | |
dee6f24c MS |
962 | /* HMI is hypervisor interrupt and host has handled it. Resume guest.*/ |
963 | case BOOK3S_INTERRUPT_HMI: | |
de56a948 PM |
964 | case BOOK3S_INTERRUPT_PERFMON: |
965 | r = RESUME_GUEST; | |
966 | break; | |
b4072df4 PM |
967 | case BOOK3S_INTERRUPT_MACHINE_CHECK: |
968 | /* | |
969 | * Deliver a machine check interrupt to the guest. | |
970 | * We have to do this, even if the host has handled the | |
971 | * machine check, because machine checks use SRR0/1 and | |
972 | * the interrupt might have trashed guest state in them. | |
973 | */ | |
974 | kvmppc_book3s_queue_irqprio(vcpu, | |
975 | BOOK3S_INTERRUPT_MACHINE_CHECK); | |
976 | r = RESUME_GUEST; | |
977 | break; | |
de56a948 PM |
978 | case BOOK3S_INTERRUPT_PROGRAM: |
979 | { | |
980 | ulong flags; | |
981 | /* | |
982 | * Normally program interrupts are delivered directly | |
983 | * to the guest by the hardware, but we can get here | |
984 | * as a result of a hypervisor emulation interrupt | |
985 | * (e40) getting turned into a 700 by BML RTAS. | |
986 | */ | |
987 | flags = vcpu->arch.shregs.msr & 0x1f0000ull; | |
988 | kvmppc_core_queue_program(vcpu, flags); | |
989 | r = RESUME_GUEST; | |
990 | break; | |
991 | } | |
992 | case BOOK3S_INTERRUPT_SYSCALL: | |
993 | { | |
994 | /* hcall - punt to userspace */ | |
995 | int i; | |
996 | ||
27025a60 LPF |
997 | /* hypercall with MSR_PR has already been handled in rmode, |
998 | * and never reaches here. | |
999 | */ | |
1000 | ||
de56a948 PM |
1001 | run->papr_hcall.nr = kvmppc_get_gpr(vcpu, 3); |
1002 | for (i = 0; i < 9; ++i) | |
1003 | run->papr_hcall.args[i] = kvmppc_get_gpr(vcpu, 4 + i); | |
1004 | run->exit_reason = KVM_EXIT_PAPR_HCALL; | |
1005 | vcpu->arch.hcall_needed = 1; | |
1006 | r = RESUME_HOST; | |
1007 | break; | |
1008 | } | |
1009 | /* | |
342d3db7 PM |
1010 | * We get these next two if the guest accesses a page which it thinks |
1011 | * it has mapped but which is not actually present, either because | |
1012 | * it is for an emulated I/O device or because the corresonding | |
1013 | * host page has been paged out. Any other HDSI/HISI interrupts | |
1014 | * have been handled already. | |
de56a948 PM |
1015 | */ |
1016 | case BOOK3S_INTERRUPT_H_DATA_STORAGE: | |
913d3ff9 | 1017 | r = RESUME_PAGE_FAULT; |
de56a948 PM |
1018 | break; |
1019 | case BOOK3S_INTERRUPT_H_INST_STORAGE: | |
913d3ff9 PM |
1020 | vcpu->arch.fault_dar = kvmppc_get_pc(vcpu); |
1021 | vcpu->arch.fault_dsisr = 0; | |
1022 | r = RESUME_PAGE_FAULT; | |
de56a948 PM |
1023 | break; |
1024 | /* | |
1025 | * This occurs if the guest executes an illegal instruction. | |
a59c1d9e MS |
1026 | * If the guest debug is disabled, generate a program interrupt |
1027 | * to the guest. If guest debug is enabled, we need to check | |
1028 | * whether the instruction is a software breakpoint instruction. | |
1029 | * Accordingly return to Guest or Host. | |
de56a948 PM |
1030 | */ |
1031 | case BOOK3S_INTERRUPT_H_EMUL_ASSIST: | |
4a157d61 PM |
1032 | if (vcpu->arch.emul_inst != KVM_INST_FETCH_FAILED) |
1033 | vcpu->arch.last_inst = kvmppc_need_byteswap(vcpu) ? | |
1034 | swab32(vcpu->arch.emul_inst) : | |
1035 | vcpu->arch.emul_inst; | |
a59c1d9e MS |
1036 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) { |
1037 | r = kvmppc_emulate_debug_inst(run, vcpu); | |
1038 | } else { | |
1039 | kvmppc_core_queue_program(vcpu, SRR1_PROGILL); | |
1040 | r = RESUME_GUEST; | |
1041 | } | |
bd3048b8 ME |
1042 | break; |
1043 | /* | |
1044 | * This occurs if the guest (kernel or userspace), does something that | |
1045 | * is prohibited by HFSCR. We just generate a program interrupt to | |
1046 | * the guest. | |
1047 | */ | |
1048 | case BOOK3S_INTERRUPT_H_FAC_UNAVAIL: | |
1049 | kvmppc_core_queue_program(vcpu, SRR1_PROGILL); | |
de56a948 PM |
1050 | r = RESUME_GUEST; |
1051 | break; | |
f7af5209 SW |
1052 | case BOOK3S_INTERRUPT_HV_RM_HARD: |
1053 | r = RESUME_PASSTHROUGH; | |
1054 | break; | |
de56a948 PM |
1055 | default: |
1056 | kvmppc_dump_regs(vcpu); | |
1057 | printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n", | |
1058 | vcpu->arch.trap, kvmppc_get_pc(vcpu), | |
1059 | vcpu->arch.shregs.msr); | |
f3271d4c | 1060 | run->hw.hardware_exit_reason = vcpu->arch.trap; |
de56a948 | 1061 | r = RESUME_HOST; |
de56a948 PM |
1062 | break; |
1063 | } | |
1064 | ||
de56a948 PM |
1065 | return r; |
1066 | } | |
1067 | ||
3a167bea AK |
1068 | static int kvm_arch_vcpu_ioctl_get_sregs_hv(struct kvm_vcpu *vcpu, |
1069 | struct kvm_sregs *sregs) | |
de56a948 PM |
1070 | { |
1071 | int i; | |
1072 | ||
de56a948 | 1073 | memset(sregs, 0, sizeof(struct kvm_sregs)); |
87916442 | 1074 | sregs->pvr = vcpu->arch.pvr; |
de56a948 PM |
1075 | for (i = 0; i < vcpu->arch.slb_max; i++) { |
1076 | sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige; | |
1077 | sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv; | |
1078 | } | |
1079 | ||
1080 | return 0; | |
1081 | } | |
1082 | ||
3a167bea AK |
1083 | static int kvm_arch_vcpu_ioctl_set_sregs_hv(struct kvm_vcpu *vcpu, |
1084 | struct kvm_sregs *sregs) | |
de56a948 PM |
1085 | { |
1086 | int i, j; | |
1087 | ||
9333e6c4 PM |
1088 | /* Only accept the same PVR as the host's, since we can't spoof it */ |
1089 | if (sregs->pvr != vcpu->arch.pvr) | |
1090 | return -EINVAL; | |
de56a948 PM |
1091 | |
1092 | j = 0; | |
1093 | for (i = 0; i < vcpu->arch.slb_nr; i++) { | |
1094 | if (sregs->u.s.ppc64.slb[i].slbe & SLB_ESID_V) { | |
1095 | vcpu->arch.slb[j].orige = sregs->u.s.ppc64.slb[i].slbe; | |
1096 | vcpu->arch.slb[j].origv = sregs->u.s.ppc64.slb[i].slbv; | |
1097 | ++j; | |
1098 | } | |
1099 | } | |
1100 | vcpu->arch.slb_max = j; | |
1101 | ||
1102 | return 0; | |
1103 | } | |
1104 | ||
a0840240 AK |
1105 | static void kvmppc_set_lpcr(struct kvm_vcpu *vcpu, u64 new_lpcr, |
1106 | bool preserve_top32) | |
a0144e2a | 1107 | { |
8f902b00 | 1108 | struct kvm *kvm = vcpu->kvm; |
a0144e2a PM |
1109 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
1110 | u64 mask; | |
1111 | ||
8f902b00 | 1112 | mutex_lock(&kvm->lock); |
a0144e2a | 1113 | spin_lock(&vc->lock); |
d682916a AB |
1114 | /* |
1115 | * If ILE (interrupt little-endian) has changed, update the | |
1116 | * MSR_LE bit in the intr_msr for each vcpu in this vcore. | |
1117 | */ | |
1118 | if ((new_lpcr & LPCR_ILE) != (vc->lpcr & LPCR_ILE)) { | |
d682916a AB |
1119 | struct kvm_vcpu *vcpu; |
1120 | int i; | |
1121 | ||
d682916a AB |
1122 | kvm_for_each_vcpu(i, vcpu, kvm) { |
1123 | if (vcpu->arch.vcore != vc) | |
1124 | continue; | |
1125 | if (new_lpcr & LPCR_ILE) | |
1126 | vcpu->arch.intr_msr |= MSR_LE; | |
1127 | else | |
1128 | vcpu->arch.intr_msr &= ~MSR_LE; | |
1129 | } | |
d682916a AB |
1130 | } |
1131 | ||
a0144e2a PM |
1132 | /* |
1133 | * Userspace can only modify DPFD (default prefetch depth), | |
1134 | * ILE (interrupt little-endian) and TC (translation control). | |
8cf4ecc0 | 1135 | * On POWER8 and POWER9 userspace can also modify AIL (alt. interrupt loc.). |
a0144e2a PM |
1136 | */ |
1137 | mask = LPCR_DPFD | LPCR_ILE | LPCR_TC; | |
e0622bd9 PM |
1138 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) |
1139 | mask |= LPCR_AIL; | |
a0840240 AK |
1140 | |
1141 | /* Broken 32-bit version of LPCR must not clear top bits */ | |
1142 | if (preserve_top32) | |
1143 | mask &= 0xFFFFFFFF; | |
a0144e2a PM |
1144 | vc->lpcr = (vc->lpcr & ~mask) | (new_lpcr & mask); |
1145 | spin_unlock(&vc->lock); | |
8f902b00 | 1146 | mutex_unlock(&kvm->lock); |
a0144e2a PM |
1147 | } |
1148 | ||
3a167bea AK |
1149 | static int kvmppc_get_one_reg_hv(struct kvm_vcpu *vcpu, u64 id, |
1150 | union kvmppc_one_reg *val) | |
31f3438e | 1151 | { |
a136a8bd PM |
1152 | int r = 0; |
1153 | long int i; | |
31f3438e | 1154 | |
a136a8bd | 1155 | switch (id) { |
a59c1d9e MS |
1156 | case KVM_REG_PPC_DEBUG_INST: |
1157 | *val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT); | |
1158 | break; | |
31f3438e | 1159 | case KVM_REG_PPC_HIOR: |
a136a8bd PM |
1160 | *val = get_reg_val(id, 0); |
1161 | break; | |
1162 | case KVM_REG_PPC_DABR: | |
1163 | *val = get_reg_val(id, vcpu->arch.dabr); | |
1164 | break; | |
8563bf52 PM |
1165 | case KVM_REG_PPC_DABRX: |
1166 | *val = get_reg_val(id, vcpu->arch.dabrx); | |
1167 | break; | |
a136a8bd PM |
1168 | case KVM_REG_PPC_DSCR: |
1169 | *val = get_reg_val(id, vcpu->arch.dscr); | |
1170 | break; | |
1171 | case KVM_REG_PPC_PURR: | |
1172 | *val = get_reg_val(id, vcpu->arch.purr); | |
1173 | break; | |
1174 | case KVM_REG_PPC_SPURR: | |
1175 | *val = get_reg_val(id, vcpu->arch.spurr); | |
1176 | break; | |
1177 | case KVM_REG_PPC_AMR: | |
1178 | *val = get_reg_val(id, vcpu->arch.amr); | |
1179 | break; | |
1180 | case KVM_REG_PPC_UAMOR: | |
1181 | *val = get_reg_val(id, vcpu->arch.uamor); | |
1182 | break; | |
b005255e | 1183 | case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRS: |
a136a8bd PM |
1184 | i = id - KVM_REG_PPC_MMCR0; |
1185 | *val = get_reg_val(id, vcpu->arch.mmcr[i]); | |
1186 | break; | |
1187 | case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8: | |
1188 | i = id - KVM_REG_PPC_PMC1; | |
1189 | *val = get_reg_val(id, vcpu->arch.pmc[i]); | |
31f3438e | 1190 | break; |
b005255e MN |
1191 | case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2: |
1192 | i = id - KVM_REG_PPC_SPMC1; | |
1193 | *val = get_reg_val(id, vcpu->arch.spmc[i]); | |
1194 | break; | |
14941789 PM |
1195 | case KVM_REG_PPC_SIAR: |
1196 | *val = get_reg_val(id, vcpu->arch.siar); | |
1197 | break; | |
1198 | case KVM_REG_PPC_SDAR: | |
1199 | *val = get_reg_val(id, vcpu->arch.sdar); | |
1200 | break; | |
b005255e MN |
1201 | case KVM_REG_PPC_SIER: |
1202 | *val = get_reg_val(id, vcpu->arch.sier); | |
a8bd19ef | 1203 | break; |
b005255e MN |
1204 | case KVM_REG_PPC_IAMR: |
1205 | *val = get_reg_val(id, vcpu->arch.iamr); | |
1206 | break; | |
b005255e MN |
1207 | case KVM_REG_PPC_PSPB: |
1208 | *val = get_reg_val(id, vcpu->arch.pspb); | |
1209 | break; | |
b005255e MN |
1210 | case KVM_REG_PPC_DPDES: |
1211 | *val = get_reg_val(id, vcpu->arch.vcore->dpdes); | |
1212 | break; | |
88b02cf9 PM |
1213 | case KVM_REG_PPC_VTB: |
1214 | *val = get_reg_val(id, vcpu->arch.vcore->vtb); | |
1215 | break; | |
b005255e MN |
1216 | case KVM_REG_PPC_DAWR: |
1217 | *val = get_reg_val(id, vcpu->arch.dawr); | |
1218 | break; | |
1219 | case KVM_REG_PPC_DAWRX: | |
1220 | *val = get_reg_val(id, vcpu->arch.dawrx); | |
1221 | break; | |
1222 | case KVM_REG_PPC_CIABR: | |
1223 | *val = get_reg_val(id, vcpu->arch.ciabr); | |
1224 | break; | |
b005255e MN |
1225 | case KVM_REG_PPC_CSIGR: |
1226 | *val = get_reg_val(id, vcpu->arch.csigr); | |
1227 | break; | |
1228 | case KVM_REG_PPC_TACR: | |
1229 | *val = get_reg_val(id, vcpu->arch.tacr); | |
1230 | break; | |
1231 | case KVM_REG_PPC_TCSCR: | |
1232 | *val = get_reg_val(id, vcpu->arch.tcscr); | |
1233 | break; | |
1234 | case KVM_REG_PPC_PID: | |
1235 | *val = get_reg_val(id, vcpu->arch.pid); | |
1236 | break; | |
1237 | case KVM_REG_PPC_ACOP: | |
1238 | *val = get_reg_val(id, vcpu->arch.acop); | |
1239 | break; | |
1240 | case KVM_REG_PPC_WORT: | |
1241 | *val = get_reg_val(id, vcpu->arch.wort); | |
a8bd19ef | 1242 | break; |
e9cf1e08 PM |
1243 | case KVM_REG_PPC_TIDR: |
1244 | *val = get_reg_val(id, vcpu->arch.tid); | |
1245 | break; | |
1246 | case KVM_REG_PPC_PSSCR: | |
1247 | *val = get_reg_val(id, vcpu->arch.psscr); | |
1248 | break; | |
55b665b0 PM |
1249 | case KVM_REG_PPC_VPA_ADDR: |
1250 | spin_lock(&vcpu->arch.vpa_update_lock); | |
1251 | *val = get_reg_val(id, vcpu->arch.vpa.next_gpa); | |
1252 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
1253 | break; | |
1254 | case KVM_REG_PPC_VPA_SLB: | |
1255 | spin_lock(&vcpu->arch.vpa_update_lock); | |
1256 | val->vpaval.addr = vcpu->arch.slb_shadow.next_gpa; | |
1257 | val->vpaval.length = vcpu->arch.slb_shadow.len; | |
1258 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
1259 | break; | |
1260 | case KVM_REG_PPC_VPA_DTL: | |
1261 | spin_lock(&vcpu->arch.vpa_update_lock); | |
1262 | val->vpaval.addr = vcpu->arch.dtl.next_gpa; | |
1263 | val->vpaval.length = vcpu->arch.dtl.len; | |
1264 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
1265 | break; | |
93b0f4dc PM |
1266 | case KVM_REG_PPC_TB_OFFSET: |
1267 | *val = get_reg_val(id, vcpu->arch.vcore->tb_offset); | |
1268 | break; | |
a0144e2a | 1269 | case KVM_REG_PPC_LPCR: |
a0840240 | 1270 | case KVM_REG_PPC_LPCR_64: |
a0144e2a PM |
1271 | *val = get_reg_val(id, vcpu->arch.vcore->lpcr); |
1272 | break; | |
4b8473c9 PM |
1273 | case KVM_REG_PPC_PPR: |
1274 | *val = get_reg_val(id, vcpu->arch.ppr); | |
1275 | break; | |
a7d80d01 MN |
1276 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
1277 | case KVM_REG_PPC_TFHAR: | |
1278 | *val = get_reg_val(id, vcpu->arch.tfhar); | |
1279 | break; | |
1280 | case KVM_REG_PPC_TFIAR: | |
1281 | *val = get_reg_val(id, vcpu->arch.tfiar); | |
1282 | break; | |
1283 | case KVM_REG_PPC_TEXASR: | |
1284 | *val = get_reg_val(id, vcpu->arch.texasr); | |
1285 | break; | |
1286 | case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31: | |
1287 | i = id - KVM_REG_PPC_TM_GPR0; | |
1288 | *val = get_reg_val(id, vcpu->arch.gpr_tm[i]); | |
1289 | break; | |
1290 | case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63: | |
1291 | { | |
1292 | int j; | |
1293 | i = id - KVM_REG_PPC_TM_VSR0; | |
1294 | if (i < 32) | |
1295 | for (j = 0; j < TS_FPRWIDTH; j++) | |
1296 | val->vsxval[j] = vcpu->arch.fp_tm.fpr[i][j]; | |
1297 | else { | |
1298 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
1299 | val->vval = vcpu->arch.vr_tm.vr[i-32]; | |
1300 | else | |
1301 | r = -ENXIO; | |
1302 | } | |
1303 | break; | |
1304 | } | |
1305 | case KVM_REG_PPC_TM_CR: | |
1306 | *val = get_reg_val(id, vcpu->arch.cr_tm); | |
1307 | break; | |
0d808df0 PM |
1308 | case KVM_REG_PPC_TM_XER: |
1309 | *val = get_reg_val(id, vcpu->arch.xer_tm); | |
1310 | break; | |
a7d80d01 MN |
1311 | case KVM_REG_PPC_TM_LR: |
1312 | *val = get_reg_val(id, vcpu->arch.lr_tm); | |
1313 | break; | |
1314 | case KVM_REG_PPC_TM_CTR: | |
1315 | *val = get_reg_val(id, vcpu->arch.ctr_tm); | |
1316 | break; | |
1317 | case KVM_REG_PPC_TM_FPSCR: | |
1318 | *val = get_reg_val(id, vcpu->arch.fp_tm.fpscr); | |
1319 | break; | |
1320 | case KVM_REG_PPC_TM_AMR: | |
1321 | *val = get_reg_val(id, vcpu->arch.amr_tm); | |
1322 | break; | |
1323 | case KVM_REG_PPC_TM_PPR: | |
1324 | *val = get_reg_val(id, vcpu->arch.ppr_tm); | |
1325 | break; | |
1326 | case KVM_REG_PPC_TM_VRSAVE: | |
1327 | *val = get_reg_val(id, vcpu->arch.vrsave_tm); | |
1328 | break; | |
1329 | case KVM_REG_PPC_TM_VSCR: | |
1330 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
1331 | *val = get_reg_val(id, vcpu->arch.vr_tm.vscr.u[3]); | |
1332 | else | |
1333 | r = -ENXIO; | |
1334 | break; | |
1335 | case KVM_REG_PPC_TM_DSCR: | |
1336 | *val = get_reg_val(id, vcpu->arch.dscr_tm); | |
1337 | break; | |
1338 | case KVM_REG_PPC_TM_TAR: | |
1339 | *val = get_reg_val(id, vcpu->arch.tar_tm); | |
1340 | break; | |
1341 | #endif | |
388cc6e1 PM |
1342 | case KVM_REG_PPC_ARCH_COMPAT: |
1343 | *val = get_reg_val(id, vcpu->arch.vcore->arch_compat); | |
1344 | break; | |
31f3438e | 1345 | default: |
a136a8bd | 1346 | r = -EINVAL; |
31f3438e PM |
1347 | break; |
1348 | } | |
1349 | ||
1350 | return r; | |
1351 | } | |
1352 | ||
3a167bea AK |
1353 | static int kvmppc_set_one_reg_hv(struct kvm_vcpu *vcpu, u64 id, |
1354 | union kvmppc_one_reg *val) | |
31f3438e | 1355 | { |
a136a8bd PM |
1356 | int r = 0; |
1357 | long int i; | |
55b665b0 | 1358 | unsigned long addr, len; |
31f3438e | 1359 | |
a136a8bd | 1360 | switch (id) { |
31f3438e | 1361 | case KVM_REG_PPC_HIOR: |
31f3438e | 1362 | /* Only allow this to be set to zero */ |
a136a8bd | 1363 | if (set_reg_val(id, *val)) |
31f3438e PM |
1364 | r = -EINVAL; |
1365 | break; | |
a136a8bd PM |
1366 | case KVM_REG_PPC_DABR: |
1367 | vcpu->arch.dabr = set_reg_val(id, *val); | |
1368 | break; | |
8563bf52 PM |
1369 | case KVM_REG_PPC_DABRX: |
1370 | vcpu->arch.dabrx = set_reg_val(id, *val) & ~DABRX_HYP; | |
1371 | break; | |
a136a8bd PM |
1372 | case KVM_REG_PPC_DSCR: |
1373 | vcpu->arch.dscr = set_reg_val(id, *val); | |
1374 | break; | |
1375 | case KVM_REG_PPC_PURR: | |
1376 | vcpu->arch.purr = set_reg_val(id, *val); | |
1377 | break; | |
1378 | case KVM_REG_PPC_SPURR: | |
1379 | vcpu->arch.spurr = set_reg_val(id, *val); | |
1380 | break; | |
1381 | case KVM_REG_PPC_AMR: | |
1382 | vcpu->arch.amr = set_reg_val(id, *val); | |
1383 | break; | |
1384 | case KVM_REG_PPC_UAMOR: | |
1385 | vcpu->arch.uamor = set_reg_val(id, *val); | |
1386 | break; | |
b005255e | 1387 | case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRS: |
a136a8bd PM |
1388 | i = id - KVM_REG_PPC_MMCR0; |
1389 | vcpu->arch.mmcr[i] = set_reg_val(id, *val); | |
1390 | break; | |
1391 | case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8: | |
1392 | i = id - KVM_REG_PPC_PMC1; | |
1393 | vcpu->arch.pmc[i] = set_reg_val(id, *val); | |
1394 | break; | |
b005255e MN |
1395 | case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2: |
1396 | i = id - KVM_REG_PPC_SPMC1; | |
1397 | vcpu->arch.spmc[i] = set_reg_val(id, *val); | |
1398 | break; | |
14941789 PM |
1399 | case KVM_REG_PPC_SIAR: |
1400 | vcpu->arch.siar = set_reg_val(id, *val); | |
1401 | break; | |
1402 | case KVM_REG_PPC_SDAR: | |
1403 | vcpu->arch.sdar = set_reg_val(id, *val); | |
1404 | break; | |
b005255e MN |
1405 | case KVM_REG_PPC_SIER: |
1406 | vcpu->arch.sier = set_reg_val(id, *val); | |
a8bd19ef | 1407 | break; |
b005255e MN |
1408 | case KVM_REG_PPC_IAMR: |
1409 | vcpu->arch.iamr = set_reg_val(id, *val); | |
1410 | break; | |
b005255e MN |
1411 | case KVM_REG_PPC_PSPB: |
1412 | vcpu->arch.pspb = set_reg_val(id, *val); | |
1413 | break; | |
b005255e MN |
1414 | case KVM_REG_PPC_DPDES: |
1415 | vcpu->arch.vcore->dpdes = set_reg_val(id, *val); | |
1416 | break; | |
88b02cf9 PM |
1417 | case KVM_REG_PPC_VTB: |
1418 | vcpu->arch.vcore->vtb = set_reg_val(id, *val); | |
1419 | break; | |
b005255e MN |
1420 | case KVM_REG_PPC_DAWR: |
1421 | vcpu->arch.dawr = set_reg_val(id, *val); | |
1422 | break; | |
1423 | case KVM_REG_PPC_DAWRX: | |
1424 | vcpu->arch.dawrx = set_reg_val(id, *val) & ~DAWRX_HYP; | |
1425 | break; | |
1426 | case KVM_REG_PPC_CIABR: | |
1427 | vcpu->arch.ciabr = set_reg_val(id, *val); | |
1428 | /* Don't allow setting breakpoints in hypervisor code */ | |
1429 | if ((vcpu->arch.ciabr & CIABR_PRIV) == CIABR_PRIV_HYPER) | |
1430 | vcpu->arch.ciabr &= ~CIABR_PRIV; /* disable */ | |
1431 | break; | |
b005255e MN |
1432 | case KVM_REG_PPC_CSIGR: |
1433 | vcpu->arch.csigr = set_reg_val(id, *val); | |
1434 | break; | |
1435 | case KVM_REG_PPC_TACR: | |
1436 | vcpu->arch.tacr = set_reg_val(id, *val); | |
1437 | break; | |
1438 | case KVM_REG_PPC_TCSCR: | |
1439 | vcpu->arch.tcscr = set_reg_val(id, *val); | |
1440 | break; | |
1441 | case KVM_REG_PPC_PID: | |
1442 | vcpu->arch.pid = set_reg_val(id, *val); | |
1443 | break; | |
1444 | case KVM_REG_PPC_ACOP: | |
1445 | vcpu->arch.acop = set_reg_val(id, *val); | |
1446 | break; | |
1447 | case KVM_REG_PPC_WORT: | |
1448 | vcpu->arch.wort = set_reg_val(id, *val); | |
a8bd19ef | 1449 | break; |
e9cf1e08 PM |
1450 | case KVM_REG_PPC_TIDR: |
1451 | vcpu->arch.tid = set_reg_val(id, *val); | |
1452 | break; | |
1453 | case KVM_REG_PPC_PSSCR: | |
1454 | vcpu->arch.psscr = set_reg_val(id, *val) & PSSCR_GUEST_VIS; | |
1455 | break; | |
55b665b0 PM |
1456 | case KVM_REG_PPC_VPA_ADDR: |
1457 | addr = set_reg_val(id, *val); | |
1458 | r = -EINVAL; | |
1459 | if (!addr && (vcpu->arch.slb_shadow.next_gpa || | |
1460 | vcpu->arch.dtl.next_gpa)) | |
1461 | break; | |
1462 | r = set_vpa(vcpu, &vcpu->arch.vpa, addr, sizeof(struct lppaca)); | |
1463 | break; | |
1464 | case KVM_REG_PPC_VPA_SLB: | |
1465 | addr = val->vpaval.addr; | |
1466 | len = val->vpaval.length; | |
1467 | r = -EINVAL; | |
1468 | if (addr && !vcpu->arch.vpa.next_gpa) | |
1469 | break; | |
1470 | r = set_vpa(vcpu, &vcpu->arch.slb_shadow, addr, len); | |
1471 | break; | |
1472 | case KVM_REG_PPC_VPA_DTL: | |
1473 | addr = val->vpaval.addr; | |
1474 | len = val->vpaval.length; | |
1475 | r = -EINVAL; | |
9f8c8c78 PM |
1476 | if (addr && (len < sizeof(struct dtl_entry) || |
1477 | !vcpu->arch.vpa.next_gpa)) | |
55b665b0 PM |
1478 | break; |
1479 | len -= len % sizeof(struct dtl_entry); | |
1480 | r = set_vpa(vcpu, &vcpu->arch.dtl, addr, len); | |
1481 | break; | |
93b0f4dc PM |
1482 | case KVM_REG_PPC_TB_OFFSET: |
1483 | /* round up to multiple of 2^24 */ | |
1484 | vcpu->arch.vcore->tb_offset = | |
1485 | ALIGN(set_reg_val(id, *val), 1UL << 24); | |
1486 | break; | |
a0144e2a | 1487 | case KVM_REG_PPC_LPCR: |
a0840240 AK |
1488 | kvmppc_set_lpcr(vcpu, set_reg_val(id, *val), true); |
1489 | break; | |
1490 | case KVM_REG_PPC_LPCR_64: | |
1491 | kvmppc_set_lpcr(vcpu, set_reg_val(id, *val), false); | |
a0144e2a | 1492 | break; |
4b8473c9 PM |
1493 | case KVM_REG_PPC_PPR: |
1494 | vcpu->arch.ppr = set_reg_val(id, *val); | |
1495 | break; | |
a7d80d01 MN |
1496 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
1497 | case KVM_REG_PPC_TFHAR: | |
1498 | vcpu->arch.tfhar = set_reg_val(id, *val); | |
1499 | break; | |
1500 | case KVM_REG_PPC_TFIAR: | |
1501 | vcpu->arch.tfiar = set_reg_val(id, *val); | |
1502 | break; | |
1503 | case KVM_REG_PPC_TEXASR: | |
1504 | vcpu->arch.texasr = set_reg_val(id, *val); | |
1505 | break; | |
1506 | case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31: | |
1507 | i = id - KVM_REG_PPC_TM_GPR0; | |
1508 | vcpu->arch.gpr_tm[i] = set_reg_val(id, *val); | |
1509 | break; | |
1510 | case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63: | |
1511 | { | |
1512 | int j; | |
1513 | i = id - KVM_REG_PPC_TM_VSR0; | |
1514 | if (i < 32) | |
1515 | for (j = 0; j < TS_FPRWIDTH; j++) | |
1516 | vcpu->arch.fp_tm.fpr[i][j] = val->vsxval[j]; | |
1517 | else | |
1518 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
1519 | vcpu->arch.vr_tm.vr[i-32] = val->vval; | |
1520 | else | |
1521 | r = -ENXIO; | |
1522 | break; | |
1523 | } | |
1524 | case KVM_REG_PPC_TM_CR: | |
1525 | vcpu->arch.cr_tm = set_reg_val(id, *val); | |
1526 | break; | |
0d808df0 PM |
1527 | case KVM_REG_PPC_TM_XER: |
1528 | vcpu->arch.xer_tm = set_reg_val(id, *val); | |
1529 | break; | |
a7d80d01 MN |
1530 | case KVM_REG_PPC_TM_LR: |
1531 | vcpu->arch.lr_tm = set_reg_val(id, *val); | |
1532 | break; | |
1533 | case KVM_REG_PPC_TM_CTR: | |
1534 | vcpu->arch.ctr_tm = set_reg_val(id, *val); | |
1535 | break; | |
1536 | case KVM_REG_PPC_TM_FPSCR: | |
1537 | vcpu->arch.fp_tm.fpscr = set_reg_val(id, *val); | |
1538 | break; | |
1539 | case KVM_REG_PPC_TM_AMR: | |
1540 | vcpu->arch.amr_tm = set_reg_val(id, *val); | |
1541 | break; | |
1542 | case KVM_REG_PPC_TM_PPR: | |
1543 | vcpu->arch.ppr_tm = set_reg_val(id, *val); | |
1544 | break; | |
1545 | case KVM_REG_PPC_TM_VRSAVE: | |
1546 | vcpu->arch.vrsave_tm = set_reg_val(id, *val); | |
1547 | break; | |
1548 | case KVM_REG_PPC_TM_VSCR: | |
1549 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
1550 | vcpu->arch.vr.vscr.u[3] = set_reg_val(id, *val); | |
1551 | else | |
1552 | r = - ENXIO; | |
1553 | break; | |
1554 | case KVM_REG_PPC_TM_DSCR: | |
1555 | vcpu->arch.dscr_tm = set_reg_val(id, *val); | |
1556 | break; | |
1557 | case KVM_REG_PPC_TM_TAR: | |
1558 | vcpu->arch.tar_tm = set_reg_val(id, *val); | |
1559 | break; | |
1560 | #endif | |
388cc6e1 PM |
1561 | case KVM_REG_PPC_ARCH_COMPAT: |
1562 | r = kvmppc_set_arch_compat(vcpu, set_reg_val(id, *val)); | |
1563 | break; | |
31f3438e | 1564 | default: |
a136a8bd | 1565 | r = -EINVAL; |
31f3438e PM |
1566 | break; |
1567 | } | |
1568 | ||
1569 | return r; | |
1570 | } | |
1571 | ||
45c940ba PM |
1572 | /* |
1573 | * On POWER9, threads are independent and can be in different partitions. | |
1574 | * Therefore we consider each thread to be a subcore. | |
1575 | * There is a restriction that all threads have to be in the same | |
1576 | * MMU mode (radix or HPT), unfortunately, but since we only support | |
1577 | * HPT guests on a HPT host so far, that isn't an impediment yet. | |
1578 | */ | |
1579 | static int threads_per_vcore(void) | |
1580 | { | |
1581 | if (cpu_has_feature(CPU_FTR_ARCH_300)) | |
1582 | return 1; | |
1583 | return threads_per_subcore; | |
1584 | } | |
1585 | ||
de9bdd1a SS |
1586 | static struct kvmppc_vcore *kvmppc_vcore_create(struct kvm *kvm, int core) |
1587 | { | |
1588 | struct kvmppc_vcore *vcore; | |
1589 | ||
1590 | vcore = kzalloc(sizeof(struct kvmppc_vcore), GFP_KERNEL); | |
1591 | ||
1592 | if (vcore == NULL) | |
1593 | return NULL; | |
1594 | ||
de9bdd1a | 1595 | spin_lock_init(&vcore->lock); |
2711e248 | 1596 | spin_lock_init(&vcore->stoltb_lock); |
8577370f | 1597 | init_swait_queue_head(&vcore->wq); |
de9bdd1a SS |
1598 | vcore->preempt_tb = TB_NIL; |
1599 | vcore->lpcr = kvm->arch.lpcr; | |
45c940ba | 1600 | vcore->first_vcpuid = core * threads_per_vcore(); |
de9bdd1a | 1601 | vcore->kvm = kvm; |
ec257165 | 1602 | INIT_LIST_HEAD(&vcore->preempt_list); |
de9bdd1a SS |
1603 | |
1604 | return vcore; | |
1605 | } | |
1606 | ||
b6c295df PM |
1607 | #ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING |
1608 | static struct debugfs_timings_element { | |
1609 | const char *name; | |
1610 | size_t offset; | |
1611 | } timings[] = { | |
1612 | {"rm_entry", offsetof(struct kvm_vcpu, arch.rm_entry)}, | |
1613 | {"rm_intr", offsetof(struct kvm_vcpu, arch.rm_intr)}, | |
1614 | {"rm_exit", offsetof(struct kvm_vcpu, arch.rm_exit)}, | |
1615 | {"guest", offsetof(struct kvm_vcpu, arch.guest_time)}, | |
1616 | {"cede", offsetof(struct kvm_vcpu, arch.cede_time)}, | |
1617 | }; | |
1618 | ||
1619 | #define N_TIMINGS (sizeof(timings) / sizeof(timings[0])) | |
1620 | ||
1621 | struct debugfs_timings_state { | |
1622 | struct kvm_vcpu *vcpu; | |
1623 | unsigned int buflen; | |
1624 | char buf[N_TIMINGS * 100]; | |
1625 | }; | |
1626 | ||
1627 | static int debugfs_timings_open(struct inode *inode, struct file *file) | |
1628 | { | |
1629 | struct kvm_vcpu *vcpu = inode->i_private; | |
1630 | struct debugfs_timings_state *p; | |
1631 | ||
1632 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
1633 | if (!p) | |
1634 | return -ENOMEM; | |
1635 | ||
1636 | kvm_get_kvm(vcpu->kvm); | |
1637 | p->vcpu = vcpu; | |
1638 | file->private_data = p; | |
1639 | ||
1640 | return nonseekable_open(inode, file); | |
1641 | } | |
1642 | ||
1643 | static int debugfs_timings_release(struct inode *inode, struct file *file) | |
1644 | { | |
1645 | struct debugfs_timings_state *p = file->private_data; | |
1646 | ||
1647 | kvm_put_kvm(p->vcpu->kvm); | |
1648 | kfree(p); | |
1649 | return 0; | |
1650 | } | |
1651 | ||
1652 | static ssize_t debugfs_timings_read(struct file *file, char __user *buf, | |
1653 | size_t len, loff_t *ppos) | |
1654 | { | |
1655 | struct debugfs_timings_state *p = file->private_data; | |
1656 | struct kvm_vcpu *vcpu = p->vcpu; | |
1657 | char *s, *buf_end; | |
1658 | struct kvmhv_tb_accumulator tb; | |
1659 | u64 count; | |
1660 | loff_t pos; | |
1661 | ssize_t n; | |
1662 | int i, loops; | |
1663 | bool ok; | |
1664 | ||
1665 | if (!p->buflen) { | |
1666 | s = p->buf; | |
1667 | buf_end = s + sizeof(p->buf); | |
1668 | for (i = 0; i < N_TIMINGS; ++i) { | |
1669 | struct kvmhv_tb_accumulator *acc; | |
1670 | ||
1671 | acc = (struct kvmhv_tb_accumulator *) | |
1672 | ((unsigned long)vcpu + timings[i].offset); | |
1673 | ok = false; | |
1674 | for (loops = 0; loops < 1000; ++loops) { | |
1675 | count = acc->seqcount; | |
1676 | if (!(count & 1)) { | |
1677 | smp_rmb(); | |
1678 | tb = *acc; | |
1679 | smp_rmb(); | |
1680 | if (count == acc->seqcount) { | |
1681 | ok = true; | |
1682 | break; | |
1683 | } | |
1684 | } | |
1685 | udelay(1); | |
1686 | } | |
1687 | if (!ok) | |
1688 | snprintf(s, buf_end - s, "%s: stuck\n", | |
1689 | timings[i].name); | |
1690 | else | |
1691 | snprintf(s, buf_end - s, | |
1692 | "%s: %llu %llu %llu %llu\n", | |
1693 | timings[i].name, count / 2, | |
1694 | tb_to_ns(tb.tb_total), | |
1695 | tb_to_ns(tb.tb_min), | |
1696 | tb_to_ns(tb.tb_max)); | |
1697 | s += strlen(s); | |
1698 | } | |
1699 | p->buflen = s - p->buf; | |
1700 | } | |
1701 | ||
1702 | pos = *ppos; | |
1703 | if (pos >= p->buflen) | |
1704 | return 0; | |
1705 | if (len > p->buflen - pos) | |
1706 | len = p->buflen - pos; | |
1707 | n = copy_to_user(buf, p->buf + pos, len); | |
1708 | if (n) { | |
1709 | if (n == len) | |
1710 | return -EFAULT; | |
1711 | len -= n; | |
1712 | } | |
1713 | *ppos = pos + len; | |
1714 | return len; | |
1715 | } | |
1716 | ||
1717 | static ssize_t debugfs_timings_write(struct file *file, const char __user *buf, | |
1718 | size_t len, loff_t *ppos) | |
1719 | { | |
1720 | return -EACCES; | |
1721 | } | |
1722 | ||
1723 | static const struct file_operations debugfs_timings_ops = { | |
1724 | .owner = THIS_MODULE, | |
1725 | .open = debugfs_timings_open, | |
1726 | .release = debugfs_timings_release, | |
1727 | .read = debugfs_timings_read, | |
1728 | .write = debugfs_timings_write, | |
1729 | .llseek = generic_file_llseek, | |
1730 | }; | |
1731 | ||
1732 | /* Create a debugfs directory for the vcpu */ | |
1733 | static void debugfs_vcpu_init(struct kvm_vcpu *vcpu, unsigned int id) | |
1734 | { | |
1735 | char buf[16]; | |
1736 | struct kvm *kvm = vcpu->kvm; | |
1737 | ||
1738 | snprintf(buf, sizeof(buf), "vcpu%u", id); | |
1739 | if (IS_ERR_OR_NULL(kvm->arch.debugfs_dir)) | |
1740 | return; | |
1741 | vcpu->arch.debugfs_dir = debugfs_create_dir(buf, kvm->arch.debugfs_dir); | |
1742 | if (IS_ERR_OR_NULL(vcpu->arch.debugfs_dir)) | |
1743 | return; | |
1744 | vcpu->arch.debugfs_timings = | |
1745 | debugfs_create_file("timings", 0444, vcpu->arch.debugfs_dir, | |
1746 | vcpu, &debugfs_timings_ops); | |
1747 | } | |
1748 | ||
1749 | #else /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */ | |
1750 | static void debugfs_vcpu_init(struct kvm_vcpu *vcpu, unsigned int id) | |
1751 | { | |
1752 | } | |
1753 | #endif /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */ | |
1754 | ||
3a167bea AK |
1755 | static struct kvm_vcpu *kvmppc_core_vcpu_create_hv(struct kvm *kvm, |
1756 | unsigned int id) | |
de56a948 PM |
1757 | { |
1758 | struct kvm_vcpu *vcpu; | |
371fefd6 PM |
1759 | int err = -EINVAL; |
1760 | int core; | |
1761 | struct kvmppc_vcore *vcore; | |
de56a948 | 1762 | |
45c940ba | 1763 | core = id / threads_per_vcore(); |
371fefd6 PM |
1764 | if (core >= KVM_MAX_VCORES) |
1765 | goto out; | |
1766 | ||
1767 | err = -ENOMEM; | |
6b75e6bf | 1768 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
de56a948 PM |
1769 | if (!vcpu) |
1770 | goto out; | |
1771 | ||
1772 | err = kvm_vcpu_init(vcpu, kvm, id); | |
1773 | if (err) | |
1774 | goto free_vcpu; | |
1775 | ||
1776 | vcpu->arch.shared = &vcpu->arch.shregs; | |
5deb8e7a AG |
1777 | #ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE |
1778 | /* | |
1779 | * The shared struct is never shared on HV, | |
1780 | * so we can always use host endianness | |
1781 | */ | |
1782 | #ifdef __BIG_ENDIAN__ | |
1783 | vcpu->arch.shared_big_endian = true; | |
1784 | #else | |
1785 | vcpu->arch.shared_big_endian = false; | |
1786 | #endif | |
1787 | #endif | |
de56a948 PM |
1788 | vcpu->arch.mmcr[0] = MMCR0_FC; |
1789 | vcpu->arch.ctrl = CTRL_RUNLATCH; | |
1790 | /* default to host PVR, since we can't spoof it */ | |
3a167bea | 1791 | kvmppc_set_pvr_hv(vcpu, mfspr(SPRN_PVR)); |
2e25aa5f | 1792 | spin_lock_init(&vcpu->arch.vpa_update_lock); |
c7b67670 PM |
1793 | spin_lock_init(&vcpu->arch.tbacct_lock); |
1794 | vcpu->arch.busy_preempt = TB_NIL; | |
d682916a | 1795 | vcpu->arch.intr_msr = MSR_SF | MSR_ME; |
de56a948 | 1796 | |
de56a948 PM |
1797 | kvmppc_mmu_book3s_hv_init(vcpu); |
1798 | ||
8455d79e | 1799 | vcpu->arch.state = KVMPPC_VCPU_NOTREADY; |
371fefd6 PM |
1800 | |
1801 | init_waitqueue_head(&vcpu->arch.cpu_run); | |
1802 | ||
1803 | mutex_lock(&kvm->lock); | |
1804 | vcore = kvm->arch.vcores[core]; | |
1805 | if (!vcore) { | |
de9bdd1a | 1806 | vcore = kvmppc_vcore_create(kvm, core); |
371fefd6 | 1807 | kvm->arch.vcores[core] = vcore; |
1b400ba0 | 1808 | kvm->arch.online_vcores++; |
371fefd6 PM |
1809 | } |
1810 | mutex_unlock(&kvm->lock); | |
1811 | ||
1812 | if (!vcore) | |
1813 | goto free_vcpu; | |
1814 | ||
1815 | spin_lock(&vcore->lock); | |
1816 | ++vcore->num_threads; | |
371fefd6 PM |
1817 | spin_unlock(&vcore->lock); |
1818 | vcpu->arch.vcore = vcore; | |
e0b7ec05 | 1819 | vcpu->arch.ptid = vcpu->vcpu_id - vcore->first_vcpuid; |
ec257165 | 1820 | vcpu->arch.thread_cpu = -1; |
a29ebeaf | 1821 | vcpu->arch.prev_cpu = -1; |
371fefd6 | 1822 | |
af8f38b3 AG |
1823 | vcpu->arch.cpu_type = KVM_CPU_3S_64; |
1824 | kvmppc_sanity_check(vcpu); | |
1825 | ||
b6c295df PM |
1826 | debugfs_vcpu_init(vcpu, id); |
1827 | ||
de56a948 PM |
1828 | return vcpu; |
1829 | ||
1830 | free_vcpu: | |
6b75e6bf | 1831 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
de56a948 PM |
1832 | out: |
1833 | return ERR_PTR(err); | |
1834 | } | |
1835 | ||
c35635ef PM |
1836 | static void unpin_vpa(struct kvm *kvm, struct kvmppc_vpa *vpa) |
1837 | { | |
1838 | if (vpa->pinned_addr) | |
1839 | kvmppc_unpin_guest_page(kvm, vpa->pinned_addr, vpa->gpa, | |
1840 | vpa->dirty); | |
1841 | } | |
1842 | ||
3a167bea | 1843 | static void kvmppc_core_vcpu_free_hv(struct kvm_vcpu *vcpu) |
de56a948 | 1844 | { |
2e25aa5f | 1845 | spin_lock(&vcpu->arch.vpa_update_lock); |
c35635ef PM |
1846 | unpin_vpa(vcpu->kvm, &vcpu->arch.dtl); |
1847 | unpin_vpa(vcpu->kvm, &vcpu->arch.slb_shadow); | |
1848 | unpin_vpa(vcpu->kvm, &vcpu->arch.vpa); | |
2e25aa5f | 1849 | spin_unlock(&vcpu->arch.vpa_update_lock); |
de56a948 | 1850 | kvm_vcpu_uninit(vcpu); |
6b75e6bf | 1851 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
de56a948 PM |
1852 | } |
1853 | ||
3a167bea AK |
1854 | static int kvmppc_core_check_requests_hv(struct kvm_vcpu *vcpu) |
1855 | { | |
1856 | /* Indicate we want to get back into the guest */ | |
1857 | return 1; | |
1858 | } | |
1859 | ||
19ccb76a | 1860 | static void kvmppc_set_timer(struct kvm_vcpu *vcpu) |
371fefd6 | 1861 | { |
19ccb76a | 1862 | unsigned long dec_nsec, now; |
371fefd6 | 1863 | |
19ccb76a PM |
1864 | now = get_tb(); |
1865 | if (now > vcpu->arch.dec_expires) { | |
1866 | /* decrementer has already gone negative */ | |
1867 | kvmppc_core_queue_dec(vcpu); | |
7e28e60e | 1868 | kvmppc_core_prepare_to_enter(vcpu); |
19ccb76a | 1869 | return; |
371fefd6 | 1870 | } |
19ccb76a PM |
1871 | dec_nsec = (vcpu->arch.dec_expires - now) * NSEC_PER_SEC |
1872 | / tb_ticks_per_sec; | |
8b0e1953 | 1873 | hrtimer_start(&vcpu->arch.dec_timer, dec_nsec, HRTIMER_MODE_REL); |
19ccb76a | 1874 | vcpu->arch.timer_running = 1; |
371fefd6 PM |
1875 | } |
1876 | ||
19ccb76a | 1877 | static void kvmppc_end_cede(struct kvm_vcpu *vcpu) |
371fefd6 | 1878 | { |
19ccb76a PM |
1879 | vcpu->arch.ceded = 0; |
1880 | if (vcpu->arch.timer_running) { | |
1881 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); | |
1882 | vcpu->arch.timer_running = 0; | |
1883 | } | |
371fefd6 PM |
1884 | } |
1885 | ||
e0b7ec05 | 1886 | extern void __kvmppc_vcore_entry(void); |
de56a948 | 1887 | |
371fefd6 PM |
1888 | static void kvmppc_remove_runnable(struct kvmppc_vcore *vc, |
1889 | struct kvm_vcpu *vcpu) | |
de56a948 | 1890 | { |
c7b67670 PM |
1891 | u64 now; |
1892 | ||
371fefd6 PM |
1893 | if (vcpu->arch.state != KVMPPC_VCPU_RUNNABLE) |
1894 | return; | |
bf3d32e1 | 1895 | spin_lock_irq(&vcpu->arch.tbacct_lock); |
c7b67670 PM |
1896 | now = mftb(); |
1897 | vcpu->arch.busy_stolen += vcore_stolen_time(vc, now) - | |
1898 | vcpu->arch.stolen_logged; | |
1899 | vcpu->arch.busy_preempt = now; | |
1900 | vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; | |
bf3d32e1 | 1901 | spin_unlock_irq(&vcpu->arch.tbacct_lock); |
371fefd6 | 1902 | --vc->n_runnable; |
7b5f8272 | 1903 | WRITE_ONCE(vc->runnable_threads[vcpu->arch.ptid], NULL); |
371fefd6 PM |
1904 | } |
1905 | ||
f0888f70 PM |
1906 | static int kvmppc_grab_hwthread(int cpu) |
1907 | { | |
1908 | struct paca_struct *tpaca; | |
b754c739 | 1909 | long timeout = 10000; |
f0888f70 PM |
1910 | |
1911 | tpaca = &paca[cpu]; | |
1912 | ||
1913 | /* Ensure the thread won't go into the kernel if it wakes */ | |
7b444c67 | 1914 | tpaca->kvm_hstate.kvm_vcpu = NULL; |
b4deba5c | 1915 | tpaca->kvm_hstate.kvm_vcore = NULL; |
5d5b99cd PM |
1916 | tpaca->kvm_hstate.napping = 0; |
1917 | smp_wmb(); | |
1918 | tpaca->kvm_hstate.hwthread_req = 1; | |
f0888f70 PM |
1919 | |
1920 | /* | |
1921 | * If the thread is already executing in the kernel (e.g. handling | |
1922 | * a stray interrupt), wait for it to get back to nap mode. | |
1923 | * The smp_mb() is to ensure that our setting of hwthread_req | |
1924 | * is visible before we look at hwthread_state, so if this | |
1925 | * races with the code at system_reset_pSeries and the thread | |
1926 | * misses our setting of hwthread_req, we are sure to see its | |
1927 | * setting of hwthread_state, and vice versa. | |
1928 | */ | |
1929 | smp_mb(); | |
1930 | while (tpaca->kvm_hstate.hwthread_state == KVM_HWTHREAD_IN_KERNEL) { | |
1931 | if (--timeout <= 0) { | |
1932 | pr_err("KVM: couldn't grab cpu %d\n", cpu); | |
1933 | return -EBUSY; | |
1934 | } | |
1935 | udelay(1); | |
1936 | } | |
1937 | return 0; | |
1938 | } | |
1939 | ||
1940 | static void kvmppc_release_hwthread(int cpu) | |
1941 | { | |
1942 | struct paca_struct *tpaca; | |
1943 | ||
1944 | tpaca = &paca[cpu]; | |
1945 | tpaca->kvm_hstate.hwthread_req = 0; | |
1946 | tpaca->kvm_hstate.kvm_vcpu = NULL; | |
b4deba5c PM |
1947 | tpaca->kvm_hstate.kvm_vcore = NULL; |
1948 | tpaca->kvm_hstate.kvm_split_mode = NULL; | |
f0888f70 PM |
1949 | } |
1950 | ||
a29ebeaf PM |
1951 | static void do_nothing(void *x) |
1952 | { | |
1953 | } | |
1954 | ||
1955 | static void radix_flush_cpu(struct kvm *kvm, int cpu, struct kvm_vcpu *vcpu) | |
1956 | { | |
1957 | int i; | |
1958 | ||
1959 | cpu = cpu_first_thread_sibling(cpu); | |
1960 | cpumask_set_cpu(cpu, &kvm->arch.need_tlb_flush); | |
1961 | /* | |
1962 | * Make sure setting of bit in need_tlb_flush precedes | |
1963 | * testing of cpu_in_guest bits. The matching barrier on | |
1964 | * the other side is the first smp_mb() in kvmppc_run_core(). | |
1965 | */ | |
1966 | smp_mb(); | |
1967 | for (i = 0; i < threads_per_core; ++i) | |
1968 | if (cpumask_test_cpu(cpu + i, &kvm->arch.cpu_in_guest)) | |
1969 | smp_call_function_single(cpu + i, do_nothing, NULL, 1); | |
1970 | } | |
1971 | ||
b4deba5c | 1972 | static void kvmppc_start_thread(struct kvm_vcpu *vcpu, struct kvmppc_vcore *vc) |
371fefd6 PM |
1973 | { |
1974 | int cpu; | |
1975 | struct paca_struct *tpaca; | |
ec257165 | 1976 | struct kvmppc_vcore *mvc = vc->master_vcore; |
a29ebeaf | 1977 | struct kvm *kvm = vc->kvm; |
371fefd6 | 1978 | |
b4deba5c PM |
1979 | cpu = vc->pcpu; |
1980 | if (vcpu) { | |
1981 | if (vcpu->arch.timer_running) { | |
1982 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); | |
1983 | vcpu->arch.timer_running = 0; | |
1984 | } | |
1985 | cpu += vcpu->arch.ptid; | |
1986 | vcpu->cpu = mvc->pcpu; | |
1987 | vcpu->arch.thread_cpu = cpu; | |
a29ebeaf PM |
1988 | |
1989 | /* | |
1990 | * With radix, the guest can do TLB invalidations itself, | |
1991 | * and it could choose to use the local form (tlbiel) if | |
1992 | * it is invalidating a translation that has only ever been | |
1993 | * used on one vcpu. However, that doesn't mean it has | |
1994 | * only ever been used on one physical cpu, since vcpus | |
1995 | * can move around between pcpus. To cope with this, when | |
1996 | * a vcpu moves from one pcpu to another, we need to tell | |
1997 | * any vcpus running on the same core as this vcpu previously | |
1998 | * ran to flush the TLB. The TLB is shared between threads, | |
1999 | * so we use a single bit in .need_tlb_flush for all 4 threads. | |
2000 | */ | |
2001 | if (kvm_is_radix(kvm) && vcpu->arch.prev_cpu != cpu) { | |
2002 | if (vcpu->arch.prev_cpu >= 0 && | |
2003 | cpu_first_thread_sibling(vcpu->arch.prev_cpu) != | |
2004 | cpu_first_thread_sibling(cpu)) | |
2005 | radix_flush_cpu(kvm, vcpu->arch.prev_cpu, vcpu); | |
2006 | vcpu->arch.prev_cpu = cpu; | |
2007 | } | |
2008 | cpumask_set_cpu(cpu, &kvm->arch.cpu_in_guest); | |
19ccb76a | 2009 | } |
371fefd6 | 2010 | tpaca = &paca[cpu]; |
5d5b99cd | 2011 | tpaca->kvm_hstate.kvm_vcpu = vcpu; |
ec257165 | 2012 | tpaca->kvm_hstate.ptid = cpu - mvc->pcpu; |
ec257165 | 2013 | /* Order stores to hstate.kvm_vcpu etc. before store to kvm_vcore */ |
371fefd6 | 2014 | smp_wmb(); |
b4deba5c | 2015 | tpaca->kvm_hstate.kvm_vcore = mvc; |
5d5b99cd | 2016 | if (cpu != smp_processor_id()) |
66feed61 | 2017 | kvmppc_ipi_thread(cpu); |
371fefd6 | 2018 | } |
de56a948 | 2019 | |
5d5b99cd | 2020 | static void kvmppc_wait_for_nap(void) |
371fefd6 | 2021 | { |
5d5b99cd PM |
2022 | int cpu = smp_processor_id(); |
2023 | int i, loops; | |
45c940ba | 2024 | int n_threads = threads_per_vcore(); |
371fefd6 | 2025 | |
45c940ba PM |
2026 | if (n_threads <= 1) |
2027 | return; | |
5d5b99cd PM |
2028 | for (loops = 0; loops < 1000000; ++loops) { |
2029 | /* | |
2030 | * Check if all threads are finished. | |
b4deba5c | 2031 | * We set the vcore pointer when starting a thread |
5d5b99cd | 2032 | * and the thread clears it when finished, so we look |
b4deba5c | 2033 | * for any threads that still have a non-NULL vcore ptr. |
5d5b99cd | 2034 | */ |
45c940ba | 2035 | for (i = 1; i < n_threads; ++i) |
b4deba5c | 2036 | if (paca[cpu + i].kvm_hstate.kvm_vcore) |
5d5b99cd | 2037 | break; |
45c940ba | 2038 | if (i == n_threads) { |
5d5b99cd PM |
2039 | HMT_medium(); |
2040 | return; | |
371fefd6 | 2041 | } |
5d5b99cd | 2042 | HMT_low(); |
371fefd6 PM |
2043 | } |
2044 | HMT_medium(); | |
45c940ba | 2045 | for (i = 1; i < n_threads; ++i) |
b4deba5c | 2046 | if (paca[cpu + i].kvm_hstate.kvm_vcore) |
5d5b99cd | 2047 | pr_err("KVM: CPU %d seems to be stuck\n", cpu + i); |
371fefd6 PM |
2048 | } |
2049 | ||
2050 | /* | |
2051 | * Check that we are on thread 0 and that any other threads in | |
7b444c67 PM |
2052 | * this core are off-line. Then grab the threads so they can't |
2053 | * enter the kernel. | |
371fefd6 PM |
2054 | */ |
2055 | static int on_primary_thread(void) | |
2056 | { | |
2057 | int cpu = smp_processor_id(); | |
3102f784 | 2058 | int thr; |
371fefd6 | 2059 | |
3102f784 ME |
2060 | /* Are we on a primary subcore? */ |
2061 | if (cpu_thread_in_subcore(cpu)) | |
371fefd6 | 2062 | return 0; |
3102f784 ME |
2063 | |
2064 | thr = 0; | |
2065 | while (++thr < threads_per_subcore) | |
371fefd6 PM |
2066 | if (cpu_online(cpu + thr)) |
2067 | return 0; | |
7b444c67 PM |
2068 | |
2069 | /* Grab all hw threads so they can't go into the kernel */ | |
3102f784 | 2070 | for (thr = 1; thr < threads_per_subcore; ++thr) { |
7b444c67 PM |
2071 | if (kvmppc_grab_hwthread(cpu + thr)) { |
2072 | /* Couldn't grab one; let the others go */ | |
2073 | do { | |
2074 | kvmppc_release_hwthread(cpu + thr); | |
2075 | } while (--thr > 0); | |
2076 | return 0; | |
2077 | } | |
2078 | } | |
371fefd6 PM |
2079 | return 1; |
2080 | } | |
2081 | ||
ec257165 PM |
2082 | /* |
2083 | * A list of virtual cores for each physical CPU. | |
2084 | * These are vcores that could run but their runner VCPU tasks are | |
2085 | * (or may be) preempted. | |
2086 | */ | |
2087 | struct preempted_vcore_list { | |
2088 | struct list_head list; | |
2089 | spinlock_t lock; | |
2090 | }; | |
2091 | ||
2092 | static DEFINE_PER_CPU(struct preempted_vcore_list, preempted_vcores); | |
2093 | ||
2094 | static void init_vcore_lists(void) | |
2095 | { | |
2096 | int cpu; | |
2097 | ||
2098 | for_each_possible_cpu(cpu) { | |
2099 | struct preempted_vcore_list *lp = &per_cpu(preempted_vcores, cpu); | |
2100 | spin_lock_init(&lp->lock); | |
2101 | INIT_LIST_HEAD(&lp->list); | |
2102 | } | |
2103 | } | |
2104 | ||
2105 | static void kvmppc_vcore_preempt(struct kvmppc_vcore *vc) | |
2106 | { | |
2107 | struct preempted_vcore_list *lp = this_cpu_ptr(&preempted_vcores); | |
2108 | ||
2109 | vc->vcore_state = VCORE_PREEMPT; | |
2110 | vc->pcpu = smp_processor_id(); | |
45c940ba | 2111 | if (vc->num_threads < threads_per_vcore()) { |
ec257165 PM |
2112 | spin_lock(&lp->lock); |
2113 | list_add_tail(&vc->preempt_list, &lp->list); | |
2114 | spin_unlock(&lp->lock); | |
2115 | } | |
2116 | ||
2117 | /* Start accumulating stolen time */ | |
2118 | kvmppc_core_start_stolen(vc); | |
2119 | } | |
2120 | ||
2121 | static void kvmppc_vcore_end_preempt(struct kvmppc_vcore *vc) | |
2122 | { | |
402813fe | 2123 | struct preempted_vcore_list *lp; |
ec257165 PM |
2124 | |
2125 | kvmppc_core_end_stolen(vc); | |
2126 | if (!list_empty(&vc->preempt_list)) { | |
402813fe | 2127 | lp = &per_cpu(preempted_vcores, vc->pcpu); |
ec257165 PM |
2128 | spin_lock(&lp->lock); |
2129 | list_del_init(&vc->preempt_list); | |
2130 | spin_unlock(&lp->lock); | |
2131 | } | |
2132 | vc->vcore_state = VCORE_INACTIVE; | |
2133 | } | |
2134 | ||
b4deba5c PM |
2135 | /* |
2136 | * This stores information about the virtual cores currently | |
2137 | * assigned to a physical core. | |
2138 | */ | |
ec257165 | 2139 | struct core_info { |
b4deba5c PM |
2140 | int n_subcores; |
2141 | int max_subcore_threads; | |
ec257165 | 2142 | int total_threads; |
b4deba5c PM |
2143 | int subcore_threads[MAX_SUBCORES]; |
2144 | struct kvm *subcore_vm[MAX_SUBCORES]; | |
2145 | struct list_head vcs[MAX_SUBCORES]; | |
ec257165 PM |
2146 | }; |
2147 | ||
b4deba5c PM |
2148 | /* |
2149 | * This mapping means subcores 0 and 1 can use threads 0-3 and 4-7 | |
2150 | * respectively in 2-way micro-threading (split-core) mode. | |
2151 | */ | |
2152 | static int subcore_thread_map[MAX_SUBCORES] = { 0, 4, 2, 6 }; | |
2153 | ||
ec257165 PM |
2154 | static void init_core_info(struct core_info *cip, struct kvmppc_vcore *vc) |
2155 | { | |
b4deba5c PM |
2156 | int sub; |
2157 | ||
ec257165 | 2158 | memset(cip, 0, sizeof(*cip)); |
b4deba5c PM |
2159 | cip->n_subcores = 1; |
2160 | cip->max_subcore_threads = vc->num_threads; | |
ec257165 | 2161 | cip->total_threads = vc->num_threads; |
b4deba5c PM |
2162 | cip->subcore_threads[0] = vc->num_threads; |
2163 | cip->subcore_vm[0] = vc->kvm; | |
2164 | for (sub = 0; sub < MAX_SUBCORES; ++sub) | |
2165 | INIT_LIST_HEAD(&cip->vcs[sub]); | |
2166 | list_add_tail(&vc->preempt_list, &cip->vcs[0]); | |
2167 | } | |
2168 | ||
2169 | static bool subcore_config_ok(int n_subcores, int n_threads) | |
2170 | { | |
2171 | /* Can only dynamically split if unsplit to begin with */ | |
2172 | if (n_subcores > 1 && threads_per_subcore < MAX_SMT_THREADS) | |
2173 | return false; | |
2174 | if (n_subcores > MAX_SUBCORES) | |
2175 | return false; | |
2176 | if (n_subcores > 1) { | |
2177 | if (!(dynamic_mt_modes & 2)) | |
2178 | n_subcores = 4; | |
2179 | if (n_subcores > 2 && !(dynamic_mt_modes & 4)) | |
2180 | return false; | |
2181 | } | |
2182 | ||
2183 | return n_subcores * roundup_pow_of_two(n_threads) <= MAX_SMT_THREADS; | |
ec257165 PM |
2184 | } |
2185 | ||
2186 | static void init_master_vcore(struct kvmppc_vcore *vc) | |
2187 | { | |
2188 | vc->master_vcore = vc; | |
2189 | vc->entry_exit_map = 0; | |
2190 | vc->in_guest = 0; | |
2191 | vc->napping_threads = 0; | |
2192 | vc->conferring_threads = 0; | |
2193 | } | |
2194 | ||
b4deba5c PM |
2195 | static bool can_dynamic_split(struct kvmppc_vcore *vc, struct core_info *cip) |
2196 | { | |
2197 | int n_threads = vc->num_threads; | |
2198 | int sub; | |
2199 | ||
2200 | if (!cpu_has_feature(CPU_FTR_ARCH_207S)) | |
2201 | return false; | |
2202 | ||
2203 | if (n_threads < cip->max_subcore_threads) | |
2204 | n_threads = cip->max_subcore_threads; | |
b009031f | 2205 | if (!subcore_config_ok(cip->n_subcores + 1, n_threads)) |
b4deba5c | 2206 | return false; |
b009031f | 2207 | cip->max_subcore_threads = n_threads; |
b4deba5c PM |
2208 | |
2209 | sub = cip->n_subcores; | |
2210 | ++cip->n_subcores; | |
2211 | cip->total_threads += vc->num_threads; | |
2212 | cip->subcore_threads[sub] = vc->num_threads; | |
2213 | cip->subcore_vm[sub] = vc->kvm; | |
2214 | init_master_vcore(vc); | |
28d057c8 | 2215 | list_move_tail(&vc->preempt_list, &cip->vcs[sub]); |
b4deba5c PM |
2216 | |
2217 | return true; | |
2218 | } | |
2219 | ||
b4deba5c PM |
2220 | /* |
2221 | * Work out whether it is possible to piggyback the execution of | |
2222 | * vcore *pvc onto the execution of the other vcores described in *cip. | |
2223 | */ | |
2224 | static bool can_piggyback(struct kvmppc_vcore *pvc, struct core_info *cip, | |
2225 | int target_threads) | |
2226 | { | |
b4deba5c PM |
2227 | if (cip->total_threads + pvc->num_threads > target_threads) |
2228 | return false; | |
b4deba5c | 2229 | |
b009031f | 2230 | return can_dynamic_split(pvc, cip); |
b4deba5c PM |
2231 | } |
2232 | ||
d911f0be PM |
2233 | static void prepare_threads(struct kvmppc_vcore *vc) |
2234 | { | |
7b5f8272 SJS |
2235 | int i; |
2236 | struct kvm_vcpu *vcpu; | |
d911f0be | 2237 | |
7b5f8272 | 2238 | for_each_runnable_thread(i, vcpu, vc) { |
d911f0be PM |
2239 | if (signal_pending(vcpu->arch.run_task)) |
2240 | vcpu->arch.ret = -EINTR; | |
2241 | else if (vcpu->arch.vpa.update_pending || | |
2242 | vcpu->arch.slb_shadow.update_pending || | |
2243 | vcpu->arch.dtl.update_pending) | |
2244 | vcpu->arch.ret = RESUME_GUEST; | |
2245 | else | |
2246 | continue; | |
2247 | kvmppc_remove_runnable(vc, vcpu); | |
2248 | wake_up(&vcpu->arch.cpu_run); | |
2249 | } | |
2250 | } | |
2251 | ||
ec257165 PM |
2252 | static void collect_piggybacks(struct core_info *cip, int target_threads) |
2253 | { | |
2254 | struct preempted_vcore_list *lp = this_cpu_ptr(&preempted_vcores); | |
2255 | struct kvmppc_vcore *pvc, *vcnext; | |
2256 | ||
2257 | spin_lock(&lp->lock); | |
2258 | list_for_each_entry_safe(pvc, vcnext, &lp->list, preempt_list) { | |
2259 | if (!spin_trylock(&pvc->lock)) | |
2260 | continue; | |
2261 | prepare_threads(pvc); | |
2262 | if (!pvc->n_runnable) { | |
2263 | list_del_init(&pvc->preempt_list); | |
2264 | if (pvc->runner == NULL) { | |
2265 | pvc->vcore_state = VCORE_INACTIVE; | |
2266 | kvmppc_core_end_stolen(pvc); | |
2267 | } | |
2268 | spin_unlock(&pvc->lock); | |
2269 | continue; | |
2270 | } | |
2271 | if (!can_piggyback(pvc, cip, target_threads)) { | |
2272 | spin_unlock(&pvc->lock); | |
2273 | continue; | |
2274 | } | |
2275 | kvmppc_core_end_stolen(pvc); | |
2276 | pvc->vcore_state = VCORE_PIGGYBACK; | |
2277 | if (cip->total_threads >= target_threads) | |
2278 | break; | |
2279 | } | |
2280 | spin_unlock(&lp->lock); | |
2281 | } | |
2282 | ||
2283 | static void post_guest_process(struct kvmppc_vcore *vc, bool is_master) | |
25fedfca | 2284 | { |
7b5f8272 | 2285 | int still_running = 0, i; |
25fedfca PM |
2286 | u64 now; |
2287 | long ret; | |
7b5f8272 | 2288 | struct kvm_vcpu *vcpu; |
25fedfca | 2289 | |
ec257165 | 2290 | spin_lock(&vc->lock); |
25fedfca | 2291 | now = get_tb(); |
7b5f8272 | 2292 | for_each_runnable_thread(i, vcpu, vc) { |
25fedfca PM |
2293 | /* cancel pending dec exception if dec is positive */ |
2294 | if (now < vcpu->arch.dec_expires && | |
2295 | kvmppc_core_pending_dec(vcpu)) | |
2296 | kvmppc_core_dequeue_dec(vcpu); | |
2297 | ||
2298 | trace_kvm_guest_exit(vcpu); | |
2299 | ||
2300 | ret = RESUME_GUEST; | |
2301 | if (vcpu->arch.trap) | |
2302 | ret = kvmppc_handle_exit_hv(vcpu->arch.kvm_run, vcpu, | |
2303 | vcpu->arch.run_task); | |
2304 | ||
2305 | vcpu->arch.ret = ret; | |
2306 | vcpu->arch.trap = 0; | |
2307 | ||
ec257165 PM |
2308 | if (is_kvmppc_resume_guest(vcpu->arch.ret)) { |
2309 | if (vcpu->arch.pending_exceptions) | |
2310 | kvmppc_core_prepare_to_enter(vcpu); | |
2311 | if (vcpu->arch.ceded) | |
25fedfca | 2312 | kvmppc_set_timer(vcpu); |
ec257165 PM |
2313 | else |
2314 | ++still_running; | |
2315 | } else { | |
25fedfca PM |
2316 | kvmppc_remove_runnable(vc, vcpu); |
2317 | wake_up(&vcpu->arch.cpu_run); | |
2318 | } | |
2319 | } | |
ec257165 PM |
2320 | list_del_init(&vc->preempt_list); |
2321 | if (!is_master) { | |
563a1e93 | 2322 | if (still_running > 0) { |
ec257165 | 2323 | kvmppc_vcore_preempt(vc); |
563a1e93 PM |
2324 | } else if (vc->runner) { |
2325 | vc->vcore_state = VCORE_PREEMPT; | |
2326 | kvmppc_core_start_stolen(vc); | |
2327 | } else { | |
2328 | vc->vcore_state = VCORE_INACTIVE; | |
2329 | } | |
ec257165 PM |
2330 | if (vc->n_runnable > 0 && vc->runner == NULL) { |
2331 | /* make sure there's a candidate runner awake */ | |
7b5f8272 SJS |
2332 | i = -1; |
2333 | vcpu = next_runnable_thread(vc, &i); | |
ec257165 PM |
2334 | wake_up(&vcpu->arch.cpu_run); |
2335 | } | |
2336 | } | |
2337 | spin_unlock(&vc->lock); | |
25fedfca PM |
2338 | } |
2339 | ||
b8e6a87c SW |
2340 | /* |
2341 | * Clear core from the list of active host cores as we are about to | |
2342 | * enter the guest. Only do this if it is the primary thread of the | |
2343 | * core (not if a subcore) that is entering the guest. | |
2344 | */ | |
3f7cd919 | 2345 | static inline int kvmppc_clear_host_core(unsigned int cpu) |
b8e6a87c SW |
2346 | { |
2347 | int core; | |
2348 | ||
2349 | if (!kvmppc_host_rm_ops_hv || cpu_thread_in_core(cpu)) | |
3f7cd919 | 2350 | return 0; |
b8e6a87c SW |
2351 | /* |
2352 | * Memory barrier can be omitted here as we will do a smp_wmb() | |
2353 | * later in kvmppc_start_thread and we need ensure that state is | |
2354 | * visible to other CPUs only after we enter guest. | |
2355 | */ | |
2356 | core = cpu >> threads_shift; | |
2357 | kvmppc_host_rm_ops_hv->rm_core[core].rm_state.in_host = 0; | |
3f7cd919 | 2358 | return 0; |
b8e6a87c SW |
2359 | } |
2360 | ||
2361 | /* | |
2362 | * Advertise this core as an active host core since we exited the guest | |
2363 | * Only need to do this if it is the primary thread of the core that is | |
2364 | * exiting. | |
2365 | */ | |
3f7cd919 | 2366 | static inline int kvmppc_set_host_core(unsigned int cpu) |
b8e6a87c SW |
2367 | { |
2368 | int core; | |
2369 | ||
2370 | if (!kvmppc_host_rm_ops_hv || cpu_thread_in_core(cpu)) | |
3f7cd919 | 2371 | return 0; |
b8e6a87c SW |
2372 | |
2373 | /* | |
2374 | * Memory barrier can be omitted here because we do a spin_unlock | |
2375 | * immediately after this which provides the memory barrier. | |
2376 | */ | |
2377 | core = cpu >> threads_shift; | |
2378 | kvmppc_host_rm_ops_hv->rm_core[core].rm_state.in_host = 1; | |
3f7cd919 | 2379 | return 0; |
b8e6a87c SW |
2380 | } |
2381 | ||
371fefd6 PM |
2382 | /* |
2383 | * Run a set of guest threads on a physical core. | |
2384 | * Called with vc->lock held. | |
2385 | */ | |
66feed61 | 2386 | static noinline void kvmppc_run_core(struct kvmppc_vcore *vc) |
371fefd6 | 2387 | { |
7b5f8272 | 2388 | struct kvm_vcpu *vcpu; |
d911f0be | 2389 | int i; |
2c9097e4 | 2390 | int srcu_idx; |
ec257165 PM |
2391 | struct core_info core_info; |
2392 | struct kvmppc_vcore *pvc, *vcnext; | |
b4deba5c PM |
2393 | struct kvm_split_mode split_info, *sip; |
2394 | int split, subcore_size, active; | |
2395 | int sub; | |
2396 | bool thr0_done; | |
2397 | unsigned long cmd_bit, stat_bit; | |
ec257165 PM |
2398 | int pcpu, thr; |
2399 | int target_threads; | |
45c940ba | 2400 | int controlled_threads; |
371fefd6 | 2401 | |
d911f0be PM |
2402 | /* |
2403 | * Remove from the list any threads that have a signal pending | |
2404 | * or need a VPA update done | |
2405 | */ | |
2406 | prepare_threads(vc); | |
2407 | ||
2408 | /* if the runner is no longer runnable, let the caller pick a new one */ | |
2409 | if (vc->runner->arch.state != KVMPPC_VCPU_RUNNABLE) | |
2410 | return; | |
081f323b PM |
2411 | |
2412 | /* | |
d911f0be | 2413 | * Initialize *vc. |
081f323b | 2414 | */ |
ec257165 | 2415 | init_master_vcore(vc); |
2711e248 | 2416 | vc->preempt_tb = TB_NIL; |
081f323b | 2417 | |
45c940ba PM |
2418 | /* |
2419 | * Number of threads that we will be controlling: the same as | |
2420 | * the number of threads per subcore, except on POWER9, | |
2421 | * where it's 1 because the threads are (mostly) independent. | |
2422 | */ | |
2423 | controlled_threads = threads_per_vcore(); | |
2424 | ||
7b444c67 | 2425 | /* |
3102f784 ME |
2426 | * Make sure we are running on primary threads, and that secondary |
2427 | * threads are offline. Also check if the number of threads in this | |
2428 | * guest are greater than the current system threads per guest. | |
7b444c67 | 2429 | */ |
45c940ba | 2430 | if ((controlled_threads > 1) && |
3102f784 | 2431 | ((vc->num_threads > threads_per_subcore) || !on_primary_thread())) { |
7b5f8272 | 2432 | for_each_runnable_thread(i, vcpu, vc) { |
7b444c67 | 2433 | vcpu->arch.ret = -EBUSY; |
25fedfca PM |
2434 | kvmppc_remove_runnable(vc, vcpu); |
2435 | wake_up(&vcpu->arch.cpu_run); | |
2436 | } | |
7b444c67 PM |
2437 | goto out; |
2438 | } | |
2439 | ||
ec257165 PM |
2440 | /* |
2441 | * See if we could run any other vcores on the physical core | |
2442 | * along with this one. | |
2443 | */ | |
2444 | init_core_info(&core_info, vc); | |
2445 | pcpu = smp_processor_id(); | |
45c940ba | 2446 | target_threads = controlled_threads; |
ec257165 PM |
2447 | if (target_smt_mode && target_smt_mode < target_threads) |
2448 | target_threads = target_smt_mode; | |
2449 | if (vc->num_threads < target_threads) | |
2450 | collect_piggybacks(&core_info, target_threads); | |
3102f784 | 2451 | |
b4deba5c PM |
2452 | /* Decide on micro-threading (split-core) mode */ |
2453 | subcore_size = threads_per_subcore; | |
2454 | cmd_bit = stat_bit = 0; | |
2455 | split = core_info.n_subcores; | |
2456 | sip = NULL; | |
2457 | if (split > 1) { | |
2458 | /* threads_per_subcore must be MAX_SMT_THREADS (8) here */ | |
2459 | if (split == 2 && (dynamic_mt_modes & 2)) { | |
2460 | cmd_bit = HID0_POWER8_1TO2LPAR; | |
2461 | stat_bit = HID0_POWER8_2LPARMODE; | |
2462 | } else { | |
2463 | split = 4; | |
2464 | cmd_bit = HID0_POWER8_1TO4LPAR; | |
2465 | stat_bit = HID0_POWER8_4LPARMODE; | |
2466 | } | |
2467 | subcore_size = MAX_SMT_THREADS / split; | |
2468 | sip = &split_info; | |
2469 | memset(&split_info, 0, sizeof(split_info)); | |
2470 | split_info.rpr = mfspr(SPRN_RPR); | |
2471 | split_info.pmmar = mfspr(SPRN_PMMAR); | |
2472 | split_info.ldbar = mfspr(SPRN_LDBAR); | |
2473 | split_info.subcore_size = subcore_size; | |
2474 | for (sub = 0; sub < core_info.n_subcores; ++sub) | |
2475 | split_info.master_vcs[sub] = | |
2476 | list_first_entry(&core_info.vcs[sub], | |
2477 | struct kvmppc_vcore, preempt_list); | |
2478 | /* order writes to split_info before kvm_split_mode pointer */ | |
2479 | smp_wmb(); | |
2480 | } | |
2481 | pcpu = smp_processor_id(); | |
45c940ba | 2482 | for (thr = 0; thr < controlled_threads; ++thr) |
b4deba5c PM |
2483 | paca[pcpu + thr].kvm_hstate.kvm_split_mode = sip; |
2484 | ||
2485 | /* Initiate micro-threading (split-core) if required */ | |
2486 | if (cmd_bit) { | |
2487 | unsigned long hid0 = mfspr(SPRN_HID0); | |
2488 | ||
2489 | hid0 |= cmd_bit | HID0_POWER8_DYNLPARDIS; | |
2490 | mb(); | |
2491 | mtspr(SPRN_HID0, hid0); | |
2492 | isync(); | |
2493 | for (;;) { | |
2494 | hid0 = mfspr(SPRN_HID0); | |
2495 | if (hid0 & stat_bit) | |
2496 | break; | |
2497 | cpu_relax(); | |
ec257165 | 2498 | } |
2e25aa5f | 2499 | } |
3102f784 | 2500 | |
b8e6a87c SW |
2501 | kvmppc_clear_host_core(pcpu); |
2502 | ||
b4deba5c PM |
2503 | /* Start all the threads */ |
2504 | active = 0; | |
2505 | for (sub = 0; sub < core_info.n_subcores; ++sub) { | |
2506 | thr = subcore_thread_map[sub]; | |
2507 | thr0_done = false; | |
2508 | active |= 1 << thr; | |
2509 | list_for_each_entry(pvc, &core_info.vcs[sub], preempt_list) { | |
2510 | pvc->pcpu = pcpu + thr; | |
7b5f8272 | 2511 | for_each_runnable_thread(i, vcpu, pvc) { |
b4deba5c PM |
2512 | kvmppc_start_thread(vcpu, pvc); |
2513 | kvmppc_create_dtl_entry(vcpu, pvc); | |
2514 | trace_kvm_guest_enter(vcpu); | |
2515 | if (!vcpu->arch.ptid) | |
2516 | thr0_done = true; | |
2517 | active |= 1 << (thr + vcpu->arch.ptid); | |
2518 | } | |
2519 | /* | |
2520 | * We need to start the first thread of each subcore | |
2521 | * even if it doesn't have a vcpu. | |
2522 | */ | |
2523 | if (pvc->master_vcore == pvc && !thr0_done) | |
2524 | kvmppc_start_thread(NULL, pvc); | |
2525 | thr += pvc->num_threads; | |
2526 | } | |
2e25aa5f | 2527 | } |
371fefd6 | 2528 | |
7f235328 GS |
2529 | /* |
2530 | * Ensure that split_info.do_nap is set after setting | |
2531 | * the vcore pointer in the PACA of the secondaries. | |
2532 | */ | |
2533 | smp_mb(); | |
2534 | if (cmd_bit) | |
2535 | split_info.do_nap = 1; /* ask secondaries to nap when done */ | |
2536 | ||
b4deba5c PM |
2537 | /* |
2538 | * When doing micro-threading, poke the inactive threads as well. | |
2539 | * This gets them to the nap instruction after kvm_do_nap, | |
2540 | * which reduces the time taken to unsplit later. | |
2541 | */ | |
2542 | if (split > 1) | |
2543 | for (thr = 1; thr < threads_per_subcore; ++thr) | |
2544 | if (!(active & (1 << thr))) | |
2545 | kvmppc_ipi_thread(pcpu + thr); | |
e0b7ec05 | 2546 | |
2f12f034 | 2547 | vc->vcore_state = VCORE_RUNNING; |
19ccb76a | 2548 | preempt_disable(); |
3c78f78a SW |
2549 | |
2550 | trace_kvmppc_run_core(vc, 0); | |
2551 | ||
b4deba5c PM |
2552 | for (sub = 0; sub < core_info.n_subcores; ++sub) |
2553 | list_for_each_entry(pvc, &core_info.vcs[sub], preempt_list) | |
2554 | spin_unlock(&pvc->lock); | |
de56a948 | 2555 | |
6edaa530 | 2556 | guest_enter(); |
2c9097e4 | 2557 | |
e0b7ec05 | 2558 | srcu_idx = srcu_read_lock(&vc->kvm->srcu); |
2c9097e4 | 2559 | |
e0b7ec05 | 2560 | __kvmppc_vcore_entry(); |
de56a948 | 2561 | |
ec257165 PM |
2562 | srcu_read_unlock(&vc->kvm->srcu, srcu_idx); |
2563 | ||
2564 | spin_lock(&vc->lock); | |
371fefd6 | 2565 | /* prevent other vcpu threads from doing kvmppc_start_thread() now */ |
19ccb76a | 2566 | vc->vcore_state = VCORE_EXITING; |
371fefd6 | 2567 | |
19ccb76a | 2568 | /* wait for secondary threads to finish writing their state to memory */ |
5d5b99cd | 2569 | kvmppc_wait_for_nap(); |
b4deba5c PM |
2570 | |
2571 | /* Return to whole-core mode if we split the core earlier */ | |
2572 | if (split > 1) { | |
2573 | unsigned long hid0 = mfspr(SPRN_HID0); | |
2574 | unsigned long loops = 0; | |
2575 | ||
2576 | hid0 &= ~HID0_POWER8_DYNLPARDIS; | |
2577 | stat_bit = HID0_POWER8_2LPARMODE | HID0_POWER8_4LPARMODE; | |
2578 | mb(); | |
2579 | mtspr(SPRN_HID0, hid0); | |
2580 | isync(); | |
2581 | for (;;) { | |
2582 | hid0 = mfspr(SPRN_HID0); | |
2583 | if (!(hid0 & stat_bit)) | |
2584 | break; | |
2585 | cpu_relax(); | |
2586 | ++loops; | |
2587 | } | |
2588 | split_info.do_nap = 0; | |
2589 | } | |
2590 | ||
2591 | /* Let secondaries go back to the offline loop */ | |
45c940ba | 2592 | for (i = 0; i < controlled_threads; ++i) { |
b4deba5c PM |
2593 | kvmppc_release_hwthread(pcpu + i); |
2594 | if (sip && sip->napped[i]) | |
2595 | kvmppc_ipi_thread(pcpu + i); | |
a29ebeaf | 2596 | cpumask_clear_cpu(pcpu + i, &vc->kvm->arch.cpu_in_guest); |
b4deba5c PM |
2597 | } |
2598 | ||
b8e6a87c SW |
2599 | kvmppc_set_host_core(pcpu); |
2600 | ||
371fefd6 | 2601 | spin_unlock(&vc->lock); |
2c9097e4 | 2602 | |
371fefd6 PM |
2603 | /* make sure updates to secondary vcpu structs are visible now */ |
2604 | smp_mb(); | |
6edaa530 | 2605 | guest_exit(); |
de56a948 | 2606 | |
b4deba5c PM |
2607 | for (sub = 0; sub < core_info.n_subcores; ++sub) |
2608 | list_for_each_entry_safe(pvc, vcnext, &core_info.vcs[sub], | |
2609 | preempt_list) | |
2610 | post_guest_process(pvc, pvc == vc); | |
de56a948 | 2611 | |
913d3ff9 | 2612 | spin_lock(&vc->lock); |
ec257165 | 2613 | preempt_enable(); |
de56a948 PM |
2614 | |
2615 | out: | |
19ccb76a | 2616 | vc->vcore_state = VCORE_INACTIVE; |
3c78f78a | 2617 | trace_kvmppc_run_core(vc, 1); |
371fefd6 PM |
2618 | } |
2619 | ||
19ccb76a PM |
2620 | /* |
2621 | * Wait for some other vcpu thread to execute us, and | |
2622 | * wake us up when we need to handle something in the host. | |
2623 | */ | |
ec257165 PM |
2624 | static void kvmppc_wait_for_exec(struct kvmppc_vcore *vc, |
2625 | struct kvm_vcpu *vcpu, int wait_state) | |
371fefd6 | 2626 | { |
371fefd6 PM |
2627 | DEFINE_WAIT(wait); |
2628 | ||
19ccb76a | 2629 | prepare_to_wait(&vcpu->arch.cpu_run, &wait, wait_state); |
ec257165 PM |
2630 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) { |
2631 | spin_unlock(&vc->lock); | |
19ccb76a | 2632 | schedule(); |
ec257165 PM |
2633 | spin_lock(&vc->lock); |
2634 | } | |
19ccb76a PM |
2635 | finish_wait(&vcpu->arch.cpu_run, &wait); |
2636 | } | |
2637 | ||
0cda69dd SJS |
2638 | static void grow_halt_poll_ns(struct kvmppc_vcore *vc) |
2639 | { | |
2640 | /* 10us base */ | |
2641 | if (vc->halt_poll_ns == 0 && halt_poll_ns_grow) | |
2642 | vc->halt_poll_ns = 10000; | |
2643 | else | |
2644 | vc->halt_poll_ns *= halt_poll_ns_grow; | |
0cda69dd SJS |
2645 | } |
2646 | ||
2647 | static void shrink_halt_poll_ns(struct kvmppc_vcore *vc) | |
2648 | { | |
2649 | if (halt_poll_ns_shrink == 0) | |
2650 | vc->halt_poll_ns = 0; | |
2651 | else | |
2652 | vc->halt_poll_ns /= halt_poll_ns_shrink; | |
2653 | } | |
2654 | ||
908a0935 SJS |
2655 | /* |
2656 | * Check to see if any of the runnable vcpus on the vcore have pending | |
0cda69dd SJS |
2657 | * exceptions or are no longer ceded |
2658 | */ | |
2659 | static int kvmppc_vcore_check_block(struct kvmppc_vcore *vc) | |
2660 | { | |
2661 | struct kvm_vcpu *vcpu; | |
2662 | int i; | |
2663 | ||
2664 | for_each_runnable_thread(i, vcpu, vc) { | |
8464c884 PM |
2665 | if (vcpu->arch.pending_exceptions || !vcpu->arch.ceded || |
2666 | vcpu->arch.prodded) | |
0cda69dd SJS |
2667 | return 1; |
2668 | } | |
2669 | ||
2670 | return 0; | |
2671 | } | |
2672 | ||
19ccb76a PM |
2673 | /* |
2674 | * All the vcpus in this vcore are idle, so wait for a decrementer | |
2675 | * or external interrupt to one of the vcpus. vc->lock is held. | |
2676 | */ | |
2677 | static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc) | |
2678 | { | |
2a27f514 | 2679 | ktime_t cur, start_poll, start_wait; |
0cda69dd | 2680 | int do_sleep = 1; |
0cda69dd | 2681 | u64 block_ns; |
8577370f | 2682 | DECLARE_SWAITQUEUE(wait); |
1bc5d59c | 2683 | |
0cda69dd | 2684 | /* Poll for pending exceptions and ceded state */ |
2a27f514 | 2685 | cur = start_poll = ktime_get(); |
0cda69dd | 2686 | if (vc->halt_poll_ns) { |
2a27f514 SJS |
2687 | ktime_t stop = ktime_add_ns(start_poll, vc->halt_poll_ns); |
2688 | ++vc->runner->stat.halt_attempted_poll; | |
1bc5d59c | 2689 | |
0cda69dd SJS |
2690 | vc->vcore_state = VCORE_POLLING; |
2691 | spin_unlock(&vc->lock); | |
2692 | ||
2693 | do { | |
2694 | if (kvmppc_vcore_check_block(vc)) { | |
2695 | do_sleep = 0; | |
2696 | break; | |
2697 | } | |
2698 | cur = ktime_get(); | |
2699 | } while (single_task_running() && ktime_before(cur, stop)); | |
2700 | ||
2701 | spin_lock(&vc->lock); | |
2702 | vc->vcore_state = VCORE_INACTIVE; | |
2703 | ||
2a27f514 SJS |
2704 | if (!do_sleep) { |
2705 | ++vc->runner->stat.halt_successful_poll; | |
0cda69dd | 2706 | goto out; |
2a27f514 | 2707 | } |
1bc5d59c SW |
2708 | } |
2709 | ||
0cda69dd SJS |
2710 | prepare_to_swait(&vc->wq, &wait, TASK_INTERRUPTIBLE); |
2711 | ||
2712 | if (kvmppc_vcore_check_block(vc)) { | |
8577370f | 2713 | finish_swait(&vc->wq, &wait); |
0cda69dd | 2714 | do_sleep = 0; |
2a27f514 SJS |
2715 | /* If we polled, count this as a successful poll */ |
2716 | if (vc->halt_poll_ns) | |
2717 | ++vc->runner->stat.halt_successful_poll; | |
0cda69dd | 2718 | goto out; |
1bc5d59c SW |
2719 | } |
2720 | ||
2a27f514 SJS |
2721 | start_wait = ktime_get(); |
2722 | ||
19ccb76a | 2723 | vc->vcore_state = VCORE_SLEEPING; |
3c78f78a | 2724 | trace_kvmppc_vcore_blocked(vc, 0); |
19ccb76a | 2725 | spin_unlock(&vc->lock); |
913d3ff9 | 2726 | schedule(); |
8577370f | 2727 | finish_swait(&vc->wq, &wait); |
19ccb76a PM |
2728 | spin_lock(&vc->lock); |
2729 | vc->vcore_state = VCORE_INACTIVE; | |
3c78f78a | 2730 | trace_kvmppc_vcore_blocked(vc, 1); |
2a27f514 | 2731 | ++vc->runner->stat.halt_successful_wait; |
0cda69dd SJS |
2732 | |
2733 | cur = ktime_get(); | |
2734 | ||
2735 | out: | |
2a27f514 SJS |
2736 | block_ns = ktime_to_ns(cur) - ktime_to_ns(start_poll); |
2737 | ||
2738 | /* Attribute wait time */ | |
2739 | if (do_sleep) { | |
2740 | vc->runner->stat.halt_wait_ns += | |
2741 | ktime_to_ns(cur) - ktime_to_ns(start_wait); | |
2742 | /* Attribute failed poll time */ | |
2743 | if (vc->halt_poll_ns) | |
2744 | vc->runner->stat.halt_poll_fail_ns += | |
2745 | ktime_to_ns(start_wait) - | |
2746 | ktime_to_ns(start_poll); | |
2747 | } else { | |
2748 | /* Attribute successful poll time */ | |
2749 | if (vc->halt_poll_ns) | |
2750 | vc->runner->stat.halt_poll_success_ns += | |
2751 | ktime_to_ns(cur) - | |
2752 | ktime_to_ns(start_poll); | |
2753 | } | |
0cda69dd SJS |
2754 | |
2755 | /* Adjust poll time */ | |
307d93e4 | 2756 | if (halt_poll_ns) { |
0cda69dd SJS |
2757 | if (block_ns <= vc->halt_poll_ns) |
2758 | ; | |
2759 | /* We slept and blocked for longer than the max halt time */ | |
307d93e4 | 2760 | else if (vc->halt_poll_ns && block_ns > halt_poll_ns) |
0cda69dd SJS |
2761 | shrink_halt_poll_ns(vc); |
2762 | /* We slept and our poll time is too small */ | |
307d93e4 SJS |
2763 | else if (vc->halt_poll_ns < halt_poll_ns && |
2764 | block_ns < halt_poll_ns) | |
0cda69dd | 2765 | grow_halt_poll_ns(vc); |
e03f3921 SJS |
2766 | if (vc->halt_poll_ns > halt_poll_ns) |
2767 | vc->halt_poll_ns = halt_poll_ns; | |
0cda69dd SJS |
2768 | } else |
2769 | vc->halt_poll_ns = 0; | |
2770 | ||
2771 | trace_kvmppc_vcore_wakeup(do_sleep, block_ns); | |
19ccb76a | 2772 | } |
371fefd6 | 2773 | |
19ccb76a PM |
2774 | static int kvmppc_run_vcpu(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) |
2775 | { | |
7b5f8272 | 2776 | int n_ceded, i; |
19ccb76a | 2777 | struct kvmppc_vcore *vc; |
7b5f8272 | 2778 | struct kvm_vcpu *v; |
9e368f29 | 2779 | |
3c78f78a SW |
2780 | trace_kvmppc_run_vcpu_enter(vcpu); |
2781 | ||
371fefd6 PM |
2782 | kvm_run->exit_reason = 0; |
2783 | vcpu->arch.ret = RESUME_GUEST; | |
2784 | vcpu->arch.trap = 0; | |
2f12f034 | 2785 | kvmppc_update_vpas(vcpu); |
371fefd6 | 2786 | |
371fefd6 PM |
2787 | /* |
2788 | * Synchronize with other threads in this virtual core | |
2789 | */ | |
2790 | vc = vcpu->arch.vcore; | |
2791 | spin_lock(&vc->lock); | |
19ccb76a | 2792 | vcpu->arch.ceded = 0; |
371fefd6 PM |
2793 | vcpu->arch.run_task = current; |
2794 | vcpu->arch.kvm_run = kvm_run; | |
c7b67670 | 2795 | vcpu->arch.stolen_logged = vcore_stolen_time(vc, mftb()); |
19ccb76a | 2796 | vcpu->arch.state = KVMPPC_VCPU_RUNNABLE; |
c7b67670 | 2797 | vcpu->arch.busy_preempt = TB_NIL; |
7b5f8272 | 2798 | WRITE_ONCE(vc->runnable_threads[vcpu->arch.ptid], vcpu); |
371fefd6 PM |
2799 | ++vc->n_runnable; |
2800 | ||
19ccb76a PM |
2801 | /* |
2802 | * This happens the first time this is called for a vcpu. | |
2803 | * If the vcore is already running, we may be able to start | |
2804 | * this thread straight away and have it join in. | |
2805 | */ | |
8455d79e | 2806 | if (!signal_pending(current)) { |
ec257165 PM |
2807 | if (vc->vcore_state == VCORE_PIGGYBACK) { |
2808 | struct kvmppc_vcore *mvc = vc->master_vcore; | |
2809 | if (spin_trylock(&mvc->lock)) { | |
2810 | if (mvc->vcore_state == VCORE_RUNNING && | |
2811 | !VCORE_IS_EXITING(mvc)) { | |
2812 | kvmppc_create_dtl_entry(vcpu, vc); | |
b4deba5c | 2813 | kvmppc_start_thread(vcpu, vc); |
ec257165 PM |
2814 | trace_kvm_guest_enter(vcpu); |
2815 | } | |
2816 | spin_unlock(&mvc->lock); | |
2817 | } | |
2818 | } else if (vc->vcore_state == VCORE_RUNNING && | |
2819 | !VCORE_IS_EXITING(vc)) { | |
2f12f034 | 2820 | kvmppc_create_dtl_entry(vcpu, vc); |
b4deba5c | 2821 | kvmppc_start_thread(vcpu, vc); |
3c78f78a | 2822 | trace_kvm_guest_enter(vcpu); |
8455d79e | 2823 | } else if (vc->vcore_state == VCORE_SLEEPING) { |
8577370f | 2824 | swake_up(&vc->wq); |
371fefd6 PM |
2825 | } |
2826 | ||
8455d79e | 2827 | } |
371fefd6 | 2828 | |
19ccb76a PM |
2829 | while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE && |
2830 | !signal_pending(current)) { | |
ec257165 PM |
2831 | if (vc->vcore_state == VCORE_PREEMPT && vc->runner == NULL) |
2832 | kvmppc_vcore_end_preempt(vc); | |
2833 | ||
8455d79e | 2834 | if (vc->vcore_state != VCORE_INACTIVE) { |
ec257165 | 2835 | kvmppc_wait_for_exec(vc, vcpu, TASK_INTERRUPTIBLE); |
19ccb76a PM |
2836 | continue; |
2837 | } | |
7b5f8272 | 2838 | for_each_runnable_thread(i, v, vc) { |
7e28e60e | 2839 | kvmppc_core_prepare_to_enter(v); |
19ccb76a PM |
2840 | if (signal_pending(v->arch.run_task)) { |
2841 | kvmppc_remove_runnable(vc, v); | |
2842 | v->stat.signal_exits++; | |
2843 | v->arch.kvm_run->exit_reason = KVM_EXIT_INTR; | |
2844 | v->arch.ret = -EINTR; | |
2845 | wake_up(&v->arch.cpu_run); | |
2846 | } | |
2847 | } | |
8455d79e PM |
2848 | if (!vc->n_runnable || vcpu->arch.state != KVMPPC_VCPU_RUNNABLE) |
2849 | break; | |
8455d79e | 2850 | n_ceded = 0; |
7b5f8272 | 2851 | for_each_runnable_thread(i, v, vc) { |
8464c884 | 2852 | if (!v->arch.pending_exceptions && !v->arch.prodded) |
8455d79e | 2853 | n_ceded += v->arch.ceded; |
4619ac88 PM |
2854 | else |
2855 | v->arch.ceded = 0; | |
2856 | } | |
25fedfca PM |
2857 | vc->runner = vcpu; |
2858 | if (n_ceded == vc->n_runnable) { | |
8455d79e | 2859 | kvmppc_vcore_blocked(vc); |
c56dadf3 | 2860 | } else if (need_resched()) { |
ec257165 | 2861 | kvmppc_vcore_preempt(vc); |
25fedfca PM |
2862 | /* Let something else run */ |
2863 | cond_resched_lock(&vc->lock); | |
ec257165 PM |
2864 | if (vc->vcore_state == VCORE_PREEMPT) |
2865 | kvmppc_vcore_end_preempt(vc); | |
25fedfca | 2866 | } else { |
8455d79e | 2867 | kvmppc_run_core(vc); |
25fedfca | 2868 | } |
0456ec4f | 2869 | vc->runner = NULL; |
19ccb76a | 2870 | } |
371fefd6 | 2871 | |
8455d79e PM |
2872 | while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE && |
2873 | (vc->vcore_state == VCORE_RUNNING || | |
5fc3e64f PM |
2874 | vc->vcore_state == VCORE_EXITING || |
2875 | vc->vcore_state == VCORE_PIGGYBACK)) | |
ec257165 | 2876 | kvmppc_wait_for_exec(vc, vcpu, TASK_UNINTERRUPTIBLE); |
8455d79e | 2877 | |
5fc3e64f PM |
2878 | if (vc->vcore_state == VCORE_PREEMPT && vc->runner == NULL) |
2879 | kvmppc_vcore_end_preempt(vc); | |
2880 | ||
8455d79e PM |
2881 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) { |
2882 | kvmppc_remove_runnable(vc, vcpu); | |
2883 | vcpu->stat.signal_exits++; | |
2884 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
2885 | vcpu->arch.ret = -EINTR; | |
2886 | } | |
2887 | ||
2888 | if (vc->n_runnable && vc->vcore_state == VCORE_INACTIVE) { | |
2889 | /* Wake up some vcpu to run the core */ | |
7b5f8272 SJS |
2890 | i = -1; |
2891 | v = next_runnable_thread(vc, &i); | |
8455d79e | 2892 | wake_up(&v->arch.cpu_run); |
371fefd6 PM |
2893 | } |
2894 | ||
3c78f78a | 2895 | trace_kvmppc_run_vcpu_exit(vcpu, kvm_run); |
371fefd6 | 2896 | spin_unlock(&vc->lock); |
371fefd6 | 2897 | return vcpu->arch.ret; |
de56a948 PM |
2898 | } |
2899 | ||
3a167bea | 2900 | static int kvmppc_vcpu_run_hv(struct kvm_run *run, struct kvm_vcpu *vcpu) |
a8606e20 PM |
2901 | { |
2902 | int r; | |
913d3ff9 | 2903 | int srcu_idx; |
a8606e20 | 2904 | |
af8f38b3 AG |
2905 | if (!vcpu->arch.sane) { |
2906 | run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
2907 | return -EINVAL; | |
2908 | } | |
2909 | ||
25051b5a SW |
2910 | kvmppc_core_prepare_to_enter(vcpu); |
2911 | ||
19ccb76a PM |
2912 | /* No need to go into the guest when all we'll do is come back out */ |
2913 | if (signal_pending(current)) { | |
2914 | run->exit_reason = KVM_EXIT_INTR; | |
2915 | return -EINTR; | |
2916 | } | |
2917 | ||
32fad281 | 2918 | atomic_inc(&vcpu->kvm->arch.vcpus_running); |
31037eca | 2919 | /* Order vcpus_running vs. hpte_setup_done, see kvmppc_alloc_reset_hpt */ |
32fad281 PM |
2920 | smp_mb(); |
2921 | ||
c17b98cf | 2922 | /* On the first time here, set up HTAB and VRMA */ |
8cf4ecc0 | 2923 | if (!kvm_is_radix(vcpu->kvm) && !vcpu->kvm->arch.hpte_setup_done) { |
32fad281 | 2924 | r = kvmppc_hv_setup_htab_rma(vcpu); |
c77162de | 2925 | if (r) |
32fad281 | 2926 | goto out; |
c77162de | 2927 | } |
19ccb76a | 2928 | |
579e633e AB |
2929 | flush_all_to_thread(current); |
2930 | ||
19ccb76a | 2931 | vcpu->arch.wqp = &vcpu->arch.vcore->wq; |
342d3db7 | 2932 | vcpu->arch.pgdir = current->mm->pgd; |
c7b67670 | 2933 | vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; |
19ccb76a | 2934 | |
a8606e20 PM |
2935 | do { |
2936 | r = kvmppc_run_vcpu(run, vcpu); | |
2937 | ||
2938 | if (run->exit_reason == KVM_EXIT_PAPR_HCALL && | |
2939 | !(vcpu->arch.shregs.msr & MSR_PR)) { | |
3c78f78a | 2940 | trace_kvm_hcall_enter(vcpu); |
a8606e20 | 2941 | r = kvmppc_pseries_do_hcall(vcpu); |
3c78f78a | 2942 | trace_kvm_hcall_exit(vcpu, r); |
7e28e60e | 2943 | kvmppc_core_prepare_to_enter(vcpu); |
913d3ff9 PM |
2944 | } else if (r == RESUME_PAGE_FAULT) { |
2945 | srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
2946 | r = kvmppc_book3s_hv_page_fault(run, vcpu, | |
2947 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); | |
2948 | srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); | |
f7af5209 SW |
2949 | } else if (r == RESUME_PASSTHROUGH) |
2950 | r = kvmppc_xics_rm_complete(vcpu, 0); | |
e59d24e6 | 2951 | } while (is_kvmppc_resume_guest(r)); |
32fad281 PM |
2952 | |
2953 | out: | |
c7b67670 | 2954 | vcpu->arch.state = KVMPPC_VCPU_NOTREADY; |
32fad281 | 2955 | atomic_dec(&vcpu->kvm->arch.vcpus_running); |
a8606e20 PM |
2956 | return r; |
2957 | } | |
2958 | ||
5b74716e BH |
2959 | static void kvmppc_add_seg_page_size(struct kvm_ppc_one_seg_page_size **sps, |
2960 | int linux_psize) | |
2961 | { | |
2962 | struct mmu_psize_def *def = &mmu_psize_defs[linux_psize]; | |
2963 | ||
2964 | if (!def->shift) | |
2965 | return; | |
2966 | (*sps)->page_shift = def->shift; | |
2967 | (*sps)->slb_enc = def->sllp; | |
2968 | (*sps)->enc[0].page_shift = def->shift; | |
b1022fbd | 2969 | (*sps)->enc[0].pte_enc = def->penc[linux_psize]; |
1f365bb0 AK |
2970 | /* |
2971 | * Add 16MB MPSS support if host supports it | |
2972 | */ | |
2973 | if (linux_psize != MMU_PAGE_16M && def->penc[MMU_PAGE_16M] != -1) { | |
2974 | (*sps)->enc[1].page_shift = 24; | |
2975 | (*sps)->enc[1].pte_enc = def->penc[MMU_PAGE_16M]; | |
2976 | } | |
5b74716e BH |
2977 | (*sps)++; |
2978 | } | |
2979 | ||
3a167bea AK |
2980 | static int kvm_vm_ioctl_get_smmu_info_hv(struct kvm *kvm, |
2981 | struct kvm_ppc_smmu_info *info) | |
5b74716e BH |
2982 | { |
2983 | struct kvm_ppc_one_seg_page_size *sps; | |
2984 | ||
8cf4ecc0 PM |
2985 | /* |
2986 | * Since we don't yet support HPT guests on a radix host, | |
2987 | * return an error if the host uses radix. | |
2988 | */ | |
2989 | if (radix_enabled()) | |
2990 | return -EINVAL; | |
2991 | ||
5b74716e BH |
2992 | info->flags = KVM_PPC_PAGE_SIZES_REAL; |
2993 | if (mmu_has_feature(MMU_FTR_1T_SEGMENT)) | |
2994 | info->flags |= KVM_PPC_1T_SEGMENTS; | |
2995 | info->slb_size = mmu_slb_size; | |
2996 | ||
2997 | /* We only support these sizes for now, and no muti-size segments */ | |
2998 | sps = &info->sps[0]; | |
2999 | kvmppc_add_seg_page_size(&sps, MMU_PAGE_4K); | |
3000 | kvmppc_add_seg_page_size(&sps, MMU_PAGE_64K); | |
3001 | kvmppc_add_seg_page_size(&sps, MMU_PAGE_16M); | |
3002 | ||
3003 | return 0; | |
3004 | } | |
3005 | ||
82ed3616 PM |
3006 | /* |
3007 | * Get (and clear) the dirty memory log for a memory slot. | |
3008 | */ | |
3a167bea AK |
3009 | static int kvm_vm_ioctl_get_dirty_log_hv(struct kvm *kvm, |
3010 | struct kvm_dirty_log *log) | |
82ed3616 | 3011 | { |
9f6b8029 | 3012 | struct kvm_memslots *slots; |
82ed3616 | 3013 | struct kvm_memory_slot *memslot; |
8f7b79b8 | 3014 | int i, r; |
82ed3616 | 3015 | unsigned long n; |
8f7b79b8 PM |
3016 | unsigned long *buf; |
3017 | struct kvm_vcpu *vcpu; | |
82ed3616 PM |
3018 | |
3019 | mutex_lock(&kvm->slots_lock); | |
3020 | ||
3021 | r = -EINVAL; | |
bbacc0c1 | 3022 | if (log->slot >= KVM_USER_MEM_SLOTS) |
82ed3616 PM |
3023 | goto out; |
3024 | ||
9f6b8029 PB |
3025 | slots = kvm_memslots(kvm); |
3026 | memslot = id_to_memslot(slots, log->slot); | |
82ed3616 PM |
3027 | r = -ENOENT; |
3028 | if (!memslot->dirty_bitmap) | |
3029 | goto out; | |
3030 | ||
8f7b79b8 PM |
3031 | /* |
3032 | * Use second half of bitmap area because radix accumulates | |
3033 | * bits in the first half. | |
3034 | */ | |
82ed3616 | 3035 | n = kvm_dirty_bitmap_bytes(memslot); |
8f7b79b8 PM |
3036 | buf = memslot->dirty_bitmap + n / sizeof(long); |
3037 | memset(buf, 0, n); | |
82ed3616 | 3038 | |
8f7b79b8 PM |
3039 | if (kvm_is_radix(kvm)) |
3040 | r = kvmppc_hv_get_dirty_log_radix(kvm, memslot, buf); | |
3041 | else | |
3042 | r = kvmppc_hv_get_dirty_log_hpt(kvm, memslot, buf); | |
82ed3616 PM |
3043 | if (r) |
3044 | goto out; | |
3045 | ||
8f7b79b8 PM |
3046 | /* Harvest dirty bits from VPA and DTL updates */ |
3047 | /* Note: we never modify the SLB shadow buffer areas */ | |
3048 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
3049 | spin_lock(&vcpu->arch.vpa_update_lock); | |
3050 | kvmppc_harvest_vpa_dirty(&vcpu->arch.vpa, memslot, buf); | |
3051 | kvmppc_harvest_vpa_dirty(&vcpu->arch.dtl, memslot, buf); | |
3052 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
3053 | } | |
3054 | ||
82ed3616 | 3055 | r = -EFAULT; |
8f7b79b8 | 3056 | if (copy_to_user(log->dirty_bitmap, buf, n)) |
82ed3616 PM |
3057 | goto out; |
3058 | ||
3059 | r = 0; | |
3060 | out: | |
3061 | mutex_unlock(&kvm->slots_lock); | |
3062 | return r; | |
3063 | } | |
3064 | ||
3a167bea AK |
3065 | static void kvmppc_core_free_memslot_hv(struct kvm_memory_slot *free, |
3066 | struct kvm_memory_slot *dont) | |
a66b48c3 PM |
3067 | { |
3068 | if (!dont || free->arch.rmap != dont->arch.rmap) { | |
3069 | vfree(free->arch.rmap); | |
3070 | free->arch.rmap = NULL; | |
b2b2f165 | 3071 | } |
a66b48c3 PM |
3072 | } |
3073 | ||
3a167bea AK |
3074 | static int kvmppc_core_create_memslot_hv(struct kvm_memory_slot *slot, |
3075 | unsigned long npages) | |
a66b48c3 | 3076 | { |
8cf4ecc0 PM |
3077 | /* |
3078 | * For now, if radix_enabled() then we only support radix guests, | |
3079 | * and in that case we don't need the rmap array. | |
3080 | */ | |
3081 | if (radix_enabled()) { | |
3082 | slot->arch.rmap = NULL; | |
3083 | return 0; | |
3084 | } | |
3085 | ||
a66b48c3 PM |
3086 | slot->arch.rmap = vzalloc(npages * sizeof(*slot->arch.rmap)); |
3087 | if (!slot->arch.rmap) | |
3088 | return -ENOMEM; | |
aa04b4cc | 3089 | |
c77162de PM |
3090 | return 0; |
3091 | } | |
aa04b4cc | 3092 | |
3a167bea AK |
3093 | static int kvmppc_core_prepare_memory_region_hv(struct kvm *kvm, |
3094 | struct kvm_memory_slot *memslot, | |
09170a49 | 3095 | const struct kvm_userspace_memory_region *mem) |
c77162de | 3096 | { |
a66b48c3 | 3097 | return 0; |
c77162de PM |
3098 | } |
3099 | ||
3a167bea | 3100 | static void kvmppc_core_commit_memory_region_hv(struct kvm *kvm, |
09170a49 | 3101 | const struct kvm_userspace_memory_region *mem, |
f36f3f28 PB |
3102 | const struct kvm_memory_slot *old, |
3103 | const struct kvm_memory_slot *new) | |
c77162de | 3104 | { |
dfe49dbd | 3105 | unsigned long npages = mem->memory_size >> PAGE_SHIFT; |
9f6b8029 | 3106 | struct kvm_memslots *slots; |
dfe49dbd PM |
3107 | struct kvm_memory_slot *memslot; |
3108 | ||
a56ee9f8 YX |
3109 | /* |
3110 | * If we are making a new memslot, it might make | |
3111 | * some address that was previously cached as emulated | |
3112 | * MMIO be no longer emulated MMIO, so invalidate | |
3113 | * all the caches of emulated MMIO translations. | |
3114 | */ | |
3115 | if (npages) | |
3116 | atomic64_inc(&kvm->arch.mmio_update); | |
3117 | ||
8f7b79b8 | 3118 | if (npages && old->npages && !kvm_is_radix(kvm)) { |
dfe49dbd PM |
3119 | /* |
3120 | * If modifying a memslot, reset all the rmap dirty bits. | |
3121 | * If this is a new memslot, we don't need to do anything | |
3122 | * since the rmap array starts out as all zeroes, | |
3123 | * i.e. no pages are dirty. | |
3124 | */ | |
9f6b8029 PB |
3125 | slots = kvm_memslots(kvm); |
3126 | memslot = id_to_memslot(slots, mem->slot); | |
8f7b79b8 | 3127 | kvmppc_hv_get_dirty_log_hpt(kvm, memslot, NULL); |
dfe49dbd | 3128 | } |
c77162de PM |
3129 | } |
3130 | ||
a0144e2a PM |
3131 | /* |
3132 | * Update LPCR values in kvm->arch and in vcores. | |
3133 | * Caller must hold kvm->lock. | |
3134 | */ | |
3135 | void kvmppc_update_lpcr(struct kvm *kvm, unsigned long lpcr, unsigned long mask) | |
3136 | { | |
3137 | long int i; | |
3138 | u32 cores_done = 0; | |
3139 | ||
3140 | if ((kvm->arch.lpcr & mask) == lpcr) | |
3141 | return; | |
3142 | ||
3143 | kvm->arch.lpcr = (kvm->arch.lpcr & ~mask) | lpcr; | |
3144 | ||
3145 | for (i = 0; i < KVM_MAX_VCORES; ++i) { | |
3146 | struct kvmppc_vcore *vc = kvm->arch.vcores[i]; | |
3147 | if (!vc) | |
3148 | continue; | |
3149 | spin_lock(&vc->lock); | |
3150 | vc->lpcr = (vc->lpcr & ~mask) | lpcr; | |
3151 | spin_unlock(&vc->lock); | |
3152 | if (++cores_done >= kvm->arch.online_vcores) | |
3153 | break; | |
3154 | } | |
3155 | } | |
3156 | ||
3a167bea AK |
3157 | static void kvmppc_mmu_destroy_hv(struct kvm_vcpu *vcpu) |
3158 | { | |
3159 | return; | |
3160 | } | |
3161 | ||
7a84084c PM |
3162 | static void kvmppc_setup_partition_table(struct kvm *kvm) |
3163 | { | |
3164 | unsigned long dw0, dw1; | |
3165 | ||
8cf4ecc0 PM |
3166 | if (!kvm_is_radix(kvm)) { |
3167 | /* PS field - page size for VRMA */ | |
3168 | dw0 = ((kvm->arch.vrma_slb_v & SLB_VSID_L) >> 1) | | |
3169 | ((kvm->arch.vrma_slb_v & SLB_VSID_LP) << 1); | |
3170 | /* HTABSIZE and HTABORG fields */ | |
3171 | dw0 |= kvm->arch.sdr1; | |
7a84084c | 3172 | |
8cf4ecc0 PM |
3173 | /* Second dword as set by userspace */ |
3174 | dw1 = kvm->arch.process_table; | |
3175 | } else { | |
3176 | dw0 = PATB_HR | radix__get_tree_size() | | |
3177 | __pa(kvm->arch.pgtable) | RADIX_PGD_INDEX_SIZE; | |
3178 | dw1 = PATB_GR | kvm->arch.process_table; | |
3179 | } | |
7a84084c PM |
3180 | |
3181 | mmu_partition_table_set_entry(kvm->arch.lpid, dw0, dw1); | |
3182 | } | |
3183 | ||
32fad281 | 3184 | static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu) |
c77162de PM |
3185 | { |
3186 | int err = 0; | |
3187 | struct kvm *kvm = vcpu->kvm; | |
c77162de PM |
3188 | unsigned long hva; |
3189 | struct kvm_memory_slot *memslot; | |
3190 | struct vm_area_struct *vma; | |
a0144e2a | 3191 | unsigned long lpcr = 0, senc; |
c77162de | 3192 | unsigned long psize, porder; |
2c9097e4 | 3193 | int srcu_idx; |
c77162de PM |
3194 | |
3195 | mutex_lock(&kvm->lock); | |
31037eca | 3196 | if (kvm->arch.hpte_setup_done) |
c77162de | 3197 | goto out; /* another vcpu beat us to it */ |
aa04b4cc | 3198 | |
32fad281 | 3199 | /* Allocate hashed page table (if not done already) and reset it */ |
3f9d4f5a | 3200 | if (!kvm->arch.hpt.virt) { |
aae0777f DG |
3201 | int order = KVM_DEFAULT_HPT_ORDER; |
3202 | struct kvm_hpt_info info; | |
3203 | ||
3204 | err = kvmppc_allocate_hpt(&info, order); | |
3205 | /* If we get here, it means userspace didn't specify a | |
3206 | * size explicitly. So, try successively smaller | |
3207 | * sizes if the default failed. */ | |
3208 | while ((err == -ENOMEM) && --order >= PPC_MIN_HPT_ORDER) | |
3209 | err = kvmppc_allocate_hpt(&info, order); | |
3210 | ||
3211 | if (err < 0) { | |
32fad281 PM |
3212 | pr_err("KVM: Couldn't alloc HPT\n"); |
3213 | goto out; | |
3214 | } | |
aae0777f DG |
3215 | |
3216 | kvmppc_set_hpt(kvm, &info); | |
32fad281 PM |
3217 | } |
3218 | ||
c77162de | 3219 | /* Look up the memslot for guest physical address 0 */ |
2c9097e4 | 3220 | srcu_idx = srcu_read_lock(&kvm->srcu); |
c77162de | 3221 | memslot = gfn_to_memslot(kvm, 0); |
aa04b4cc | 3222 | |
c77162de PM |
3223 | /* We must have some memory at 0 by now */ |
3224 | err = -EINVAL; | |
3225 | if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) | |
2c9097e4 | 3226 | goto out_srcu; |
c77162de PM |
3227 | |
3228 | /* Look up the VMA for the start of this memory slot */ | |
3229 | hva = memslot->userspace_addr; | |
3230 | down_read(¤t->mm->mmap_sem); | |
3231 | vma = find_vma(current->mm, hva); | |
3232 | if (!vma || vma->vm_start > hva || (vma->vm_flags & VM_IO)) | |
3233 | goto up_out; | |
3234 | ||
3235 | psize = vma_kernel_pagesize(vma); | |
da9d1d7f | 3236 | porder = __ilog2(psize); |
c77162de | 3237 | |
c77162de PM |
3238 | up_read(¤t->mm->mmap_sem); |
3239 | ||
c17b98cf PM |
3240 | /* We can handle 4k, 64k or 16M pages in the VRMA */ |
3241 | err = -EINVAL; | |
3242 | if (!(psize == 0x1000 || psize == 0x10000 || | |
3243 | psize == 0x1000000)) | |
3244 | goto out_srcu; | |
c77162de | 3245 | |
c17b98cf PM |
3246 | senc = slb_pgsize_encoding(psize); |
3247 | kvm->arch.vrma_slb_v = senc | SLB_VSID_B_1T | | |
3248 | (VRMA_VSID << SLB_VSID_SHIFT_1T); | |
c17b98cf PM |
3249 | /* Create HPTEs in the hash page table for the VRMA */ |
3250 | kvmppc_map_vrma(vcpu, memslot, porder); | |
aa04b4cc | 3251 | |
7a84084c PM |
3252 | /* Update VRMASD field in the LPCR */ |
3253 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) { | |
3254 | /* the -4 is to account for senc values starting at 0x10 */ | |
3255 | lpcr = senc << (LPCR_VRMASD_SH - 4); | |
3256 | kvmppc_update_lpcr(kvm, lpcr, LPCR_VRMASD); | |
3257 | } else { | |
3258 | kvmppc_setup_partition_table(kvm); | |
3259 | } | |
a0144e2a | 3260 | |
31037eca | 3261 | /* Order updates to kvm->arch.lpcr etc. vs. hpte_setup_done */ |
c77162de | 3262 | smp_wmb(); |
31037eca | 3263 | kvm->arch.hpte_setup_done = 1; |
c77162de | 3264 | err = 0; |
2c9097e4 PM |
3265 | out_srcu: |
3266 | srcu_read_unlock(&kvm->srcu, srcu_idx); | |
c77162de PM |
3267 | out: |
3268 | mutex_unlock(&kvm->lock); | |
3269 | return err; | |
b2b2f165 | 3270 | |
c77162de PM |
3271 | up_out: |
3272 | up_read(¤t->mm->mmap_sem); | |
505d6421 | 3273 | goto out_srcu; |
de56a948 PM |
3274 | } |
3275 | ||
79b6c247 SW |
3276 | #ifdef CONFIG_KVM_XICS |
3277 | /* | |
3278 | * Allocate a per-core structure for managing state about which cores are | |
3279 | * running in the host versus the guest and for exchanging data between | |
3280 | * real mode KVM and CPU running in the host. | |
3281 | * This is only done for the first VM. | |
3282 | * The allocated structure stays even if all VMs have stopped. | |
3283 | * It is only freed when the kvm-hv module is unloaded. | |
3284 | * It's OK for this routine to fail, we just don't support host | |
3285 | * core operations like redirecting H_IPI wakeups. | |
3286 | */ | |
3287 | void kvmppc_alloc_host_rm_ops(void) | |
3288 | { | |
3289 | struct kvmppc_host_rm_ops *ops; | |
3290 | unsigned long l_ops; | |
3291 | int cpu, core; | |
3292 | int size; | |
3293 | ||
3294 | /* Not the first time here ? */ | |
3295 | if (kvmppc_host_rm_ops_hv != NULL) | |
3296 | return; | |
3297 | ||
3298 | ops = kzalloc(sizeof(struct kvmppc_host_rm_ops), GFP_KERNEL); | |
3299 | if (!ops) | |
3300 | return; | |
3301 | ||
3302 | size = cpu_nr_cores() * sizeof(struct kvmppc_host_rm_core); | |
3303 | ops->rm_core = kzalloc(size, GFP_KERNEL); | |
3304 | ||
3305 | if (!ops->rm_core) { | |
3306 | kfree(ops); | |
3307 | return; | |
3308 | } | |
3309 | ||
6f3bb809 SW |
3310 | get_online_cpus(); |
3311 | ||
79b6c247 SW |
3312 | for (cpu = 0; cpu < nr_cpu_ids; cpu += threads_per_core) { |
3313 | if (!cpu_online(cpu)) | |
3314 | continue; | |
3315 | ||
3316 | core = cpu >> threads_shift; | |
3317 | ops->rm_core[core].rm_state.in_host = 1; | |
3318 | } | |
3319 | ||
0c2a6606 SW |
3320 | ops->vcpu_kick = kvmppc_fast_vcpu_kick_hv; |
3321 | ||
79b6c247 SW |
3322 | /* |
3323 | * Make the contents of the kvmppc_host_rm_ops structure visible | |
3324 | * to other CPUs before we assign it to the global variable. | |
3325 | * Do an atomic assignment (no locks used here), but if someone | |
3326 | * beats us to it, just free our copy and return. | |
3327 | */ | |
3328 | smp_wmb(); | |
3329 | l_ops = (unsigned long) ops; | |
3330 | ||
3331 | if (cmpxchg64((unsigned long *)&kvmppc_host_rm_ops_hv, 0, l_ops)) { | |
6f3bb809 | 3332 | put_online_cpus(); |
79b6c247 SW |
3333 | kfree(ops->rm_core); |
3334 | kfree(ops); | |
6f3bb809 | 3335 | return; |
79b6c247 | 3336 | } |
6f3bb809 | 3337 | |
3f7cd919 AMG |
3338 | cpuhp_setup_state_nocalls(CPUHP_KVM_PPC_BOOK3S_PREPARE, |
3339 | "ppc/kvm_book3s:prepare", | |
3340 | kvmppc_set_host_core, | |
3341 | kvmppc_clear_host_core); | |
6f3bb809 | 3342 | put_online_cpus(); |
79b6c247 SW |
3343 | } |
3344 | ||
3345 | void kvmppc_free_host_rm_ops(void) | |
3346 | { | |
3347 | if (kvmppc_host_rm_ops_hv) { | |
3f7cd919 | 3348 | cpuhp_remove_state_nocalls(CPUHP_KVM_PPC_BOOK3S_PREPARE); |
79b6c247 SW |
3349 | kfree(kvmppc_host_rm_ops_hv->rm_core); |
3350 | kfree(kvmppc_host_rm_ops_hv); | |
3351 | kvmppc_host_rm_ops_hv = NULL; | |
3352 | } | |
3353 | } | |
3354 | #endif | |
3355 | ||
3a167bea | 3356 | static int kvmppc_core_init_vm_hv(struct kvm *kvm) |
de56a948 | 3357 | { |
32fad281 | 3358 | unsigned long lpcr, lpid; |
e23a808b | 3359 | char buf[32]; |
8cf4ecc0 | 3360 | int ret; |
de56a948 | 3361 | |
32fad281 PM |
3362 | /* Allocate the guest's logical partition ID */ |
3363 | ||
3364 | lpid = kvmppc_alloc_lpid(); | |
5d226ae5 | 3365 | if ((long)lpid < 0) |
32fad281 PM |
3366 | return -ENOMEM; |
3367 | kvm->arch.lpid = lpid; | |
de56a948 | 3368 | |
79b6c247 SW |
3369 | kvmppc_alloc_host_rm_ops(); |
3370 | ||
1b400ba0 PM |
3371 | /* |
3372 | * Since we don't flush the TLB when tearing down a VM, | |
3373 | * and this lpid might have previously been used, | |
3374 | * make sure we flush on each core before running the new VM. | |
7c5b06ca PM |
3375 | * On POWER9, the tlbie in mmu_partition_table_set_entry() |
3376 | * does this flush for us. | |
1b400ba0 | 3377 | */ |
7c5b06ca PM |
3378 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
3379 | cpumask_setall(&kvm->arch.need_tlb_flush); | |
1b400ba0 | 3380 | |
699a0ea0 PM |
3381 | /* Start out with the default set of hcalls enabled */ |
3382 | memcpy(kvm->arch.enabled_hcalls, default_enabled_hcalls, | |
3383 | sizeof(kvm->arch.enabled_hcalls)); | |
3384 | ||
7a84084c PM |
3385 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
3386 | kvm->arch.host_sdr1 = mfspr(SPRN_SDR1); | |
aa04b4cc | 3387 | |
c17b98cf PM |
3388 | /* Init LPCR for virtual RMA mode */ |
3389 | kvm->arch.host_lpid = mfspr(SPRN_LPID); | |
3390 | kvm->arch.host_lpcr = lpcr = mfspr(SPRN_LPCR); | |
3391 | lpcr &= LPCR_PECE | LPCR_LPES; | |
3392 | lpcr |= (4UL << LPCR_DPFD_SH) | LPCR_HDICE | | |
3393 | LPCR_VPM0 | LPCR_VPM1; | |
3394 | kvm->arch.vrma_slb_v = SLB_VSID_B_1T | | |
3395 | (VRMA_VSID << SLB_VSID_SHIFT_1T); | |
3396 | /* On POWER8 turn on online bit to enable PURR/SPURR */ | |
3397 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) | |
3398 | lpcr |= LPCR_ONL; | |
84f7139c PM |
3399 | /* |
3400 | * On POWER9, VPM0 bit is reserved (VPM0=1 behaviour is assumed) | |
3401 | * Set HVICE bit to enable hypervisor virtualization interrupts. | |
3402 | */ | |
3403 | if (cpu_has_feature(CPU_FTR_ARCH_300)) { | |
7a84084c | 3404 | lpcr &= ~LPCR_VPM0; |
84f7139c PM |
3405 | lpcr |= LPCR_HVICE; |
3406 | } | |
3407 | ||
8cf4ecc0 PM |
3408 | /* |
3409 | * For now, if the host uses radix, the guest must be radix. | |
3410 | */ | |
3411 | if (radix_enabled()) { | |
3412 | kvm->arch.radix = 1; | |
3413 | lpcr &= ~LPCR_VPM1; | |
3414 | lpcr |= LPCR_UPRT | LPCR_GTSE | LPCR_HR; | |
3415 | ret = kvmppc_init_vm_radix(kvm); | |
3416 | if (ret) { | |
3417 | kvmppc_free_lpid(kvm->arch.lpid); | |
3418 | return ret; | |
3419 | } | |
3420 | kvmppc_setup_partition_table(kvm); | |
3421 | } | |
3422 | ||
9e368f29 | 3423 | kvm->arch.lpcr = lpcr; |
aa04b4cc | 3424 | |
5e985969 DG |
3425 | /* Initialization for future HPT resizes */ |
3426 | kvm->arch.resize_hpt = NULL; | |
3427 | ||
7c5b06ca PM |
3428 | /* |
3429 | * Work out how many sets the TLB has, for the use of | |
3430 | * the TLB invalidation loop in book3s_hv_rmhandlers.S. | |
3431 | */ | |
8cf4ecc0 PM |
3432 | if (kvm_is_radix(kvm)) |
3433 | kvm->arch.tlb_sets = POWER9_TLB_SETS_RADIX; /* 128 */ | |
3434 | else if (cpu_has_feature(CPU_FTR_ARCH_300)) | |
7c5b06ca PM |
3435 | kvm->arch.tlb_sets = POWER9_TLB_SETS_HASH; /* 256 */ |
3436 | else if (cpu_has_feature(CPU_FTR_ARCH_207S)) | |
3437 | kvm->arch.tlb_sets = POWER8_TLB_SETS; /* 512 */ | |
3438 | else | |
3439 | kvm->arch.tlb_sets = POWER7_TLB_SETS; /* 128 */ | |
3440 | ||
512691d4 | 3441 | /* |
441c19c8 ME |
3442 | * Track that we now have a HV mode VM active. This blocks secondary |
3443 | * CPU threads from coming online. | |
8cf4ecc0 PM |
3444 | * On POWER9, we only need to do this for HPT guests on a radix |
3445 | * host, which is not yet supported. | |
512691d4 | 3446 | */ |
8cf4ecc0 PM |
3447 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
3448 | kvm_hv_vm_activated(); | |
512691d4 | 3449 | |
e23a808b PM |
3450 | /* |
3451 | * Create a debugfs directory for the VM | |
3452 | */ | |
3453 | snprintf(buf, sizeof(buf), "vm%d", current->pid); | |
3454 | kvm->arch.debugfs_dir = debugfs_create_dir(buf, kvm_debugfs_dir); | |
3455 | if (!IS_ERR_OR_NULL(kvm->arch.debugfs_dir)) | |
3456 | kvmppc_mmu_debugfs_init(kvm); | |
3457 | ||
54738c09 | 3458 | return 0; |
de56a948 PM |
3459 | } |
3460 | ||
f1378b1c PM |
3461 | static void kvmppc_free_vcores(struct kvm *kvm) |
3462 | { | |
3463 | long int i; | |
3464 | ||
23316316 | 3465 | for (i = 0; i < KVM_MAX_VCORES; ++i) |
f1378b1c PM |
3466 | kfree(kvm->arch.vcores[i]); |
3467 | kvm->arch.online_vcores = 0; | |
3468 | } | |
3469 | ||
3a167bea | 3470 | static void kvmppc_core_destroy_vm_hv(struct kvm *kvm) |
de56a948 | 3471 | { |
e23a808b PM |
3472 | debugfs_remove_recursive(kvm->arch.debugfs_dir); |
3473 | ||
8cf4ecc0 PM |
3474 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
3475 | kvm_hv_vm_deactivated(); | |
512691d4 | 3476 | |
f1378b1c | 3477 | kvmppc_free_vcores(kvm); |
aa04b4cc | 3478 | |
8cf4ecc0 PM |
3479 | kvmppc_free_lpid(kvm->arch.lpid); |
3480 | ||
5a319350 PM |
3481 | if (kvm_is_radix(kvm)) |
3482 | kvmppc_free_radix(kvm); | |
3483 | else | |
aae0777f | 3484 | kvmppc_free_hpt(&kvm->arch.hpt); |
c57875f5 SW |
3485 | |
3486 | kvmppc_free_pimap(kvm); | |
de56a948 PM |
3487 | } |
3488 | ||
3a167bea AK |
3489 | /* We don't need to emulate any privileged instructions or dcbz */ |
3490 | static int kvmppc_core_emulate_op_hv(struct kvm_run *run, struct kvm_vcpu *vcpu, | |
3491 | unsigned int inst, int *advance) | |
de56a948 | 3492 | { |
3a167bea | 3493 | return EMULATE_FAIL; |
de56a948 PM |
3494 | } |
3495 | ||
3a167bea AK |
3496 | static int kvmppc_core_emulate_mtspr_hv(struct kvm_vcpu *vcpu, int sprn, |
3497 | ulong spr_val) | |
de56a948 PM |
3498 | { |
3499 | return EMULATE_FAIL; | |
3500 | } | |
3501 | ||
3a167bea AK |
3502 | static int kvmppc_core_emulate_mfspr_hv(struct kvm_vcpu *vcpu, int sprn, |
3503 | ulong *spr_val) | |
de56a948 PM |
3504 | { |
3505 | return EMULATE_FAIL; | |
3506 | } | |
3507 | ||
3a167bea | 3508 | static int kvmppc_core_check_processor_compat_hv(void) |
de56a948 | 3509 | { |
c17b98cf PM |
3510 | if (!cpu_has_feature(CPU_FTR_HVMODE) || |
3511 | !cpu_has_feature(CPU_FTR_ARCH_206)) | |
3a167bea | 3512 | return -EIO; |
50de596d | 3513 | |
3a167bea | 3514 | return 0; |
de56a948 PM |
3515 | } |
3516 | ||
8daaafc8 SW |
3517 | #ifdef CONFIG_KVM_XICS |
3518 | ||
3519 | void kvmppc_free_pimap(struct kvm *kvm) | |
3520 | { | |
3521 | kfree(kvm->arch.pimap); | |
3522 | } | |
3523 | ||
c57875f5 | 3524 | static struct kvmppc_passthru_irqmap *kvmppc_alloc_pimap(void) |
8daaafc8 SW |
3525 | { |
3526 | return kzalloc(sizeof(struct kvmppc_passthru_irqmap), GFP_KERNEL); | |
3527 | } | |
c57875f5 SW |
3528 | |
3529 | static int kvmppc_set_passthru_irq(struct kvm *kvm, int host_irq, int guest_gsi) | |
3530 | { | |
3531 | struct irq_desc *desc; | |
3532 | struct kvmppc_irq_map *irq_map; | |
3533 | struct kvmppc_passthru_irqmap *pimap; | |
3534 | struct irq_chip *chip; | |
3535 | int i; | |
3536 | ||
644abbb2 SW |
3537 | if (!kvm_irq_bypass) |
3538 | return 1; | |
3539 | ||
c57875f5 SW |
3540 | desc = irq_to_desc(host_irq); |
3541 | if (!desc) | |
3542 | return -EIO; | |
3543 | ||
3544 | mutex_lock(&kvm->lock); | |
3545 | ||
3546 | pimap = kvm->arch.pimap; | |
3547 | if (pimap == NULL) { | |
3548 | /* First call, allocate structure to hold IRQ map */ | |
3549 | pimap = kvmppc_alloc_pimap(); | |
3550 | if (pimap == NULL) { | |
3551 | mutex_unlock(&kvm->lock); | |
3552 | return -ENOMEM; | |
3553 | } | |
3554 | kvm->arch.pimap = pimap; | |
3555 | } | |
3556 | ||
3557 | /* | |
3558 | * For now, we only support interrupts for which the EOI operation | |
3559 | * is an OPAL call followed by a write to XIRR, since that's | |
3560 | * what our real-mode EOI code does. | |
3561 | */ | |
3562 | chip = irq_data_get_irq_chip(&desc->irq_data); | |
3563 | if (!chip || !is_pnv_opal_msi(chip)) { | |
3564 | pr_warn("kvmppc_set_passthru_irq_hv: Could not assign IRQ map for (%d,%d)\n", | |
3565 | host_irq, guest_gsi); | |
3566 | mutex_unlock(&kvm->lock); | |
3567 | return -ENOENT; | |
3568 | } | |
3569 | ||
3570 | /* | |
3571 | * See if we already have an entry for this guest IRQ number. | |
3572 | * If it's mapped to a hardware IRQ number, that's an error, | |
3573 | * otherwise re-use this entry. | |
3574 | */ | |
3575 | for (i = 0; i < pimap->n_mapped; i++) { | |
3576 | if (guest_gsi == pimap->mapped[i].v_hwirq) { | |
3577 | if (pimap->mapped[i].r_hwirq) { | |
3578 | mutex_unlock(&kvm->lock); | |
3579 | return -EINVAL; | |
3580 | } | |
3581 | break; | |
3582 | } | |
3583 | } | |
3584 | ||
3585 | if (i == KVMPPC_PIRQ_MAPPED) { | |
3586 | mutex_unlock(&kvm->lock); | |
3587 | return -EAGAIN; /* table is full */ | |
3588 | } | |
3589 | ||
3590 | irq_map = &pimap->mapped[i]; | |
3591 | ||
3592 | irq_map->v_hwirq = guest_gsi; | |
c57875f5 SW |
3593 | irq_map->desc = desc; |
3594 | ||
e3c13e56 SW |
3595 | /* |
3596 | * Order the above two stores before the next to serialize with | |
3597 | * the KVM real mode handler. | |
3598 | */ | |
3599 | smp_wmb(); | |
3600 | irq_map->r_hwirq = desc->irq_data.hwirq; | |
3601 | ||
c57875f5 SW |
3602 | if (i == pimap->n_mapped) |
3603 | pimap->n_mapped++; | |
3604 | ||
5d375199 PM |
3605 | kvmppc_xics_set_mapped(kvm, guest_gsi, desc->irq_data.hwirq); |
3606 | ||
c57875f5 SW |
3607 | mutex_unlock(&kvm->lock); |
3608 | ||
3609 | return 0; | |
3610 | } | |
3611 | ||
3612 | static int kvmppc_clr_passthru_irq(struct kvm *kvm, int host_irq, int guest_gsi) | |
3613 | { | |
3614 | struct irq_desc *desc; | |
3615 | struct kvmppc_passthru_irqmap *pimap; | |
3616 | int i; | |
3617 | ||
644abbb2 SW |
3618 | if (!kvm_irq_bypass) |
3619 | return 0; | |
3620 | ||
c57875f5 SW |
3621 | desc = irq_to_desc(host_irq); |
3622 | if (!desc) | |
3623 | return -EIO; | |
3624 | ||
3625 | mutex_lock(&kvm->lock); | |
3626 | ||
3627 | if (kvm->arch.pimap == NULL) { | |
3628 | mutex_unlock(&kvm->lock); | |
3629 | return 0; | |
3630 | } | |
3631 | pimap = kvm->arch.pimap; | |
3632 | ||
3633 | for (i = 0; i < pimap->n_mapped; i++) { | |
3634 | if (guest_gsi == pimap->mapped[i].v_hwirq) | |
3635 | break; | |
3636 | } | |
3637 | ||
3638 | if (i == pimap->n_mapped) { | |
3639 | mutex_unlock(&kvm->lock); | |
3640 | return -ENODEV; | |
3641 | } | |
3642 | ||
5d375199 PM |
3643 | kvmppc_xics_clr_mapped(kvm, guest_gsi, pimap->mapped[i].r_hwirq); |
3644 | ||
c57875f5 SW |
3645 | /* invalidate the entry */ |
3646 | pimap->mapped[i].r_hwirq = 0; | |
3647 | ||
3648 | /* | |
3649 | * We don't free this structure even when the count goes to | |
3650 | * zero. The structure is freed when we destroy the VM. | |
3651 | */ | |
3652 | ||
3653 | mutex_unlock(&kvm->lock); | |
3654 | return 0; | |
3655 | } | |
3656 | ||
3657 | static int kvmppc_irq_bypass_add_producer_hv(struct irq_bypass_consumer *cons, | |
3658 | struct irq_bypass_producer *prod) | |
3659 | { | |
3660 | int ret = 0; | |
3661 | struct kvm_kernel_irqfd *irqfd = | |
3662 | container_of(cons, struct kvm_kernel_irqfd, consumer); | |
3663 | ||
3664 | irqfd->producer = prod; | |
3665 | ||
3666 | ret = kvmppc_set_passthru_irq(irqfd->kvm, prod->irq, irqfd->gsi); | |
3667 | if (ret) | |
3668 | pr_info("kvmppc_set_passthru_irq (irq %d, gsi %d) fails: %d\n", | |
3669 | prod->irq, irqfd->gsi, ret); | |
3670 | ||
3671 | return ret; | |
3672 | } | |
3673 | ||
3674 | static void kvmppc_irq_bypass_del_producer_hv(struct irq_bypass_consumer *cons, | |
3675 | struct irq_bypass_producer *prod) | |
3676 | { | |
3677 | int ret; | |
3678 | struct kvm_kernel_irqfd *irqfd = | |
3679 | container_of(cons, struct kvm_kernel_irqfd, consumer); | |
3680 | ||
3681 | irqfd->producer = NULL; | |
3682 | ||
3683 | /* | |
3684 | * When producer of consumer is unregistered, we change back to | |
3685 | * default external interrupt handling mode - KVM real mode | |
3686 | * will switch back to host. | |
3687 | */ | |
3688 | ret = kvmppc_clr_passthru_irq(irqfd->kvm, prod->irq, irqfd->gsi); | |
3689 | if (ret) | |
3690 | pr_warn("kvmppc_clr_passthru_irq (irq %d, gsi %d) fails: %d\n", | |
3691 | prod->irq, irqfd->gsi, ret); | |
3692 | } | |
8daaafc8 SW |
3693 | #endif |
3694 | ||
3a167bea AK |
3695 | static long kvm_arch_vm_ioctl_hv(struct file *filp, |
3696 | unsigned int ioctl, unsigned long arg) | |
3697 | { | |
3698 | struct kvm *kvm __maybe_unused = filp->private_data; | |
3699 | void __user *argp = (void __user *)arg; | |
3700 | long r; | |
3701 | ||
3702 | switch (ioctl) { | |
3703 | ||
3a167bea AK |
3704 | case KVM_PPC_ALLOCATE_HTAB: { |
3705 | u32 htab_order; | |
3706 | ||
3707 | r = -EFAULT; | |
3708 | if (get_user(htab_order, (u32 __user *)argp)) | |
3709 | break; | |
f98a8bf9 | 3710 | r = kvmppc_alloc_reset_hpt(kvm, htab_order); |
3a167bea AK |
3711 | if (r) |
3712 | break; | |
3a167bea AK |
3713 | r = 0; |
3714 | break; | |
3715 | } | |
3716 | ||
3717 | case KVM_PPC_GET_HTAB_FD: { | |
3718 | struct kvm_get_htab_fd ghf; | |
3719 | ||
3720 | r = -EFAULT; | |
3721 | if (copy_from_user(&ghf, argp, sizeof(ghf))) | |
3722 | break; | |
3723 | r = kvm_vm_ioctl_get_htab_fd(kvm, &ghf); | |
3724 | break; | |
3725 | } | |
3726 | ||
5e985969 DG |
3727 | case KVM_PPC_RESIZE_HPT_PREPARE: { |
3728 | struct kvm_ppc_resize_hpt rhpt; | |
3729 | ||
3730 | r = -EFAULT; | |
3731 | if (copy_from_user(&rhpt, argp, sizeof(rhpt))) | |
3732 | break; | |
3733 | ||
3734 | r = kvm_vm_ioctl_resize_hpt_prepare(kvm, &rhpt); | |
3735 | break; | |
3736 | } | |
3737 | ||
3738 | case KVM_PPC_RESIZE_HPT_COMMIT: { | |
3739 | struct kvm_ppc_resize_hpt rhpt; | |
3740 | ||
3741 | r = -EFAULT; | |
3742 | if (copy_from_user(&rhpt, argp, sizeof(rhpt))) | |
3743 | break; | |
3744 | ||
3745 | r = kvm_vm_ioctl_resize_hpt_commit(kvm, &rhpt); | |
3746 | break; | |
3747 | } | |
3748 | ||
3a167bea AK |
3749 | default: |
3750 | r = -ENOTTY; | |
3751 | } | |
3752 | ||
3753 | return r; | |
3754 | } | |
3755 | ||
699a0ea0 PM |
3756 | /* |
3757 | * List of hcall numbers to enable by default. | |
3758 | * For compatibility with old userspace, we enable by default | |
3759 | * all hcalls that were implemented before the hcall-enabling | |
3760 | * facility was added. Note this list should not include H_RTAS. | |
3761 | */ | |
3762 | static unsigned int default_hcall_list[] = { | |
3763 | H_REMOVE, | |
3764 | H_ENTER, | |
3765 | H_READ, | |
3766 | H_PROTECT, | |
3767 | H_BULK_REMOVE, | |
3768 | H_GET_TCE, | |
3769 | H_PUT_TCE, | |
3770 | H_SET_DABR, | |
3771 | H_SET_XDABR, | |
3772 | H_CEDE, | |
3773 | H_PROD, | |
3774 | H_CONFER, | |
3775 | H_REGISTER_VPA, | |
3776 | #ifdef CONFIG_KVM_XICS | |
3777 | H_EOI, | |
3778 | H_CPPR, | |
3779 | H_IPI, | |
3780 | H_IPOLL, | |
3781 | H_XIRR, | |
3782 | H_XIRR_X, | |
3783 | #endif | |
3784 | 0 | |
3785 | }; | |
3786 | ||
3787 | static void init_default_hcalls(void) | |
3788 | { | |
3789 | int i; | |
ae2113a4 | 3790 | unsigned int hcall; |
699a0ea0 | 3791 | |
ae2113a4 PM |
3792 | for (i = 0; default_hcall_list[i]; ++i) { |
3793 | hcall = default_hcall_list[i]; | |
3794 | WARN_ON(!kvmppc_hcall_impl_hv(hcall)); | |
3795 | __set_bit(hcall / 4, default_enabled_hcalls); | |
3796 | } | |
699a0ea0 PM |
3797 | } |
3798 | ||
c9270132 PM |
3799 | static int kvmhv_configure_mmu(struct kvm *kvm, struct kvm_ppc_mmuv3_cfg *cfg) |
3800 | { | |
468808bd | 3801 | unsigned long lpcr; |
8cf4ecc0 | 3802 | int radix; |
468808bd PM |
3803 | |
3804 | /* If not on a POWER9, reject it */ | |
3805 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) | |
3806 | return -ENODEV; | |
3807 | ||
3808 | /* If any unknown flags set, reject it */ | |
3809 | if (cfg->flags & ~(KVM_PPC_MMUV3_RADIX | KVM_PPC_MMUV3_GTSE)) | |
3810 | return -EINVAL; | |
3811 | ||
8cf4ecc0 PM |
3812 | /* We can't change a guest to/from radix yet */ |
3813 | radix = !!(cfg->flags & KVM_PPC_MMUV3_RADIX); | |
3814 | if (radix != kvm_is_radix(kvm)) | |
468808bd PM |
3815 | return -EINVAL; |
3816 | ||
3817 | /* GR (guest radix) bit in process_table field must match */ | |
8cf4ecc0 | 3818 | if (!!(cfg->process_table & PATB_GR) != radix) |
468808bd PM |
3819 | return -EINVAL; |
3820 | ||
3821 | /* Process table size field must be reasonable, i.e. <= 24 */ | |
3822 | if ((cfg->process_table & PRTS_MASK) > 24) | |
3823 | return -EINVAL; | |
3824 | ||
3825 | kvm->arch.process_table = cfg->process_table; | |
3826 | kvmppc_setup_partition_table(kvm); | |
3827 | ||
3828 | lpcr = (cfg->flags & KVM_PPC_MMUV3_GTSE) ? LPCR_GTSE : 0; | |
3829 | kvmppc_update_lpcr(kvm, lpcr, LPCR_GTSE); | |
3830 | ||
3831 | return 0; | |
c9270132 PM |
3832 | } |
3833 | ||
cbbc58d4 | 3834 | static struct kvmppc_ops kvm_ops_hv = { |
3a167bea AK |
3835 | .get_sregs = kvm_arch_vcpu_ioctl_get_sregs_hv, |
3836 | .set_sregs = kvm_arch_vcpu_ioctl_set_sregs_hv, | |
3837 | .get_one_reg = kvmppc_get_one_reg_hv, | |
3838 | .set_one_reg = kvmppc_set_one_reg_hv, | |
3839 | .vcpu_load = kvmppc_core_vcpu_load_hv, | |
3840 | .vcpu_put = kvmppc_core_vcpu_put_hv, | |
3841 | .set_msr = kvmppc_set_msr_hv, | |
3842 | .vcpu_run = kvmppc_vcpu_run_hv, | |
3843 | .vcpu_create = kvmppc_core_vcpu_create_hv, | |
3844 | .vcpu_free = kvmppc_core_vcpu_free_hv, | |
3845 | .check_requests = kvmppc_core_check_requests_hv, | |
3846 | .get_dirty_log = kvm_vm_ioctl_get_dirty_log_hv, | |
3847 | .flush_memslot = kvmppc_core_flush_memslot_hv, | |
3848 | .prepare_memory_region = kvmppc_core_prepare_memory_region_hv, | |
3849 | .commit_memory_region = kvmppc_core_commit_memory_region_hv, | |
3850 | .unmap_hva = kvm_unmap_hva_hv, | |
3851 | .unmap_hva_range = kvm_unmap_hva_range_hv, | |
3852 | .age_hva = kvm_age_hva_hv, | |
3853 | .test_age_hva = kvm_test_age_hva_hv, | |
3854 | .set_spte_hva = kvm_set_spte_hva_hv, | |
3855 | .mmu_destroy = kvmppc_mmu_destroy_hv, | |
3856 | .free_memslot = kvmppc_core_free_memslot_hv, | |
3857 | .create_memslot = kvmppc_core_create_memslot_hv, | |
3858 | .init_vm = kvmppc_core_init_vm_hv, | |
3859 | .destroy_vm = kvmppc_core_destroy_vm_hv, | |
3a167bea AK |
3860 | .get_smmu_info = kvm_vm_ioctl_get_smmu_info_hv, |
3861 | .emulate_op = kvmppc_core_emulate_op_hv, | |
3862 | .emulate_mtspr = kvmppc_core_emulate_mtspr_hv, | |
3863 | .emulate_mfspr = kvmppc_core_emulate_mfspr_hv, | |
3864 | .fast_vcpu_kick = kvmppc_fast_vcpu_kick_hv, | |
3865 | .arch_vm_ioctl = kvm_arch_vm_ioctl_hv, | |
ae2113a4 | 3866 | .hcall_implemented = kvmppc_hcall_impl_hv, |
c57875f5 SW |
3867 | #ifdef CONFIG_KVM_XICS |
3868 | .irq_bypass_add_producer = kvmppc_irq_bypass_add_producer_hv, | |
3869 | .irq_bypass_del_producer = kvmppc_irq_bypass_del_producer_hv, | |
3870 | #endif | |
c9270132 PM |
3871 | .configure_mmu = kvmhv_configure_mmu, |
3872 | .get_rmmu_info = kvmhv_get_rmmu_info, | |
3a167bea AK |
3873 | }; |
3874 | ||
fd7bacbc MS |
3875 | static int kvm_init_subcore_bitmap(void) |
3876 | { | |
3877 | int i, j; | |
3878 | int nr_cores = cpu_nr_cores(); | |
3879 | struct sibling_subcore_state *sibling_subcore_state; | |
3880 | ||
3881 | for (i = 0; i < nr_cores; i++) { | |
3882 | int first_cpu = i * threads_per_core; | |
3883 | int node = cpu_to_node(first_cpu); | |
3884 | ||
3885 | /* Ignore if it is already allocated. */ | |
3886 | if (paca[first_cpu].sibling_subcore_state) | |
3887 | continue; | |
3888 | ||
3889 | sibling_subcore_state = | |
3890 | kmalloc_node(sizeof(struct sibling_subcore_state), | |
3891 | GFP_KERNEL, node); | |
3892 | if (!sibling_subcore_state) | |
3893 | return -ENOMEM; | |
3894 | ||
3895 | memset(sibling_subcore_state, 0, | |
3896 | sizeof(struct sibling_subcore_state)); | |
3897 | ||
3898 | for (j = 0; j < threads_per_core; j++) { | |
3899 | int cpu = first_cpu + j; | |
3900 | ||
3901 | paca[cpu].sibling_subcore_state = sibling_subcore_state; | |
3902 | } | |
3903 | } | |
3904 | return 0; | |
3905 | } | |
3906 | ||
5a319350 PM |
3907 | static int kvmppc_radix_possible(void) |
3908 | { | |
3909 | return cpu_has_feature(CPU_FTR_ARCH_300) && radix_enabled(); | |
3910 | } | |
3911 | ||
3a167bea | 3912 | static int kvmppc_book3s_init_hv(void) |
de56a948 PM |
3913 | { |
3914 | int r; | |
cbbc58d4 AK |
3915 | /* |
3916 | * FIXME!! Do we need to check on all cpus ? | |
3917 | */ | |
3918 | r = kvmppc_core_check_processor_compat_hv(); | |
3919 | if (r < 0) | |
739e2425 | 3920 | return -ENODEV; |
de56a948 | 3921 | |
fd7bacbc MS |
3922 | r = kvm_init_subcore_bitmap(); |
3923 | if (r) | |
3924 | return r; | |
3925 | ||
f725758b PM |
3926 | /* |
3927 | * We need a way of accessing the XICS interrupt controller, | |
3928 | * either directly, via paca[cpu].kvm_hstate.xics_phys, or | |
3929 | * indirectly, via OPAL. | |
3930 | */ | |
3931 | #ifdef CONFIG_SMP | |
3932 | if (!get_paca()->kvm_hstate.xics_phys) { | |
3933 | struct device_node *np; | |
3934 | ||
3935 | np = of_find_compatible_node(NULL, NULL, "ibm,opal-intc"); | |
3936 | if (!np) { | |
3937 | pr_err("KVM-HV: Cannot determine method for accessing XICS\n"); | |
3938 | return -ENODEV; | |
3939 | } | |
3940 | } | |
3941 | #endif | |
3942 | ||
cbbc58d4 AK |
3943 | kvm_ops_hv.owner = THIS_MODULE; |
3944 | kvmppc_hv_ops = &kvm_ops_hv; | |
de56a948 | 3945 | |
699a0ea0 PM |
3946 | init_default_hcalls(); |
3947 | ||
ec257165 PM |
3948 | init_vcore_lists(); |
3949 | ||
cbbc58d4 | 3950 | r = kvmppc_mmu_hv_init(); |
5a319350 PM |
3951 | if (r) |
3952 | return r; | |
3953 | ||
3954 | if (kvmppc_radix_possible()) | |
3955 | r = kvmppc_radix_init(); | |
de56a948 PM |
3956 | return r; |
3957 | } | |
3958 | ||
3a167bea | 3959 | static void kvmppc_book3s_exit_hv(void) |
de56a948 | 3960 | { |
79b6c247 | 3961 | kvmppc_free_host_rm_ops(); |
5a319350 PM |
3962 | if (kvmppc_radix_possible()) |
3963 | kvmppc_radix_exit(); | |
cbbc58d4 | 3964 | kvmppc_hv_ops = NULL; |
de56a948 PM |
3965 | } |
3966 | ||
3a167bea AK |
3967 | module_init(kvmppc_book3s_init_hv); |
3968 | module_exit(kvmppc_book3s_exit_hv); | |
2ba9f0d8 | 3969 | MODULE_LICENSE("GPL"); |
398a76c6 AG |
3970 | MODULE_ALIAS_MISCDEV(KVM_MINOR); |
3971 | MODULE_ALIAS("devname:kvm"); | |
7c5b06ca | 3972 |