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Merge tag 'efi-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi into...
[mirror_ubuntu-artful-kernel.git] / arch / powerpc / kvm / book3s_hv.c
CommitLineData
de56a948
PM		 1/*
2 * Copyright 2011 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com>
3 * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved.
4 *
5 * Authors:
6 * Paul Mackerras <paulus@au1.ibm.com>
7 * Alexander Graf <agraf@suse.de>
8 * Kevin Wolf <mail@kevin-wolf.de>
9 *
10 * Description: KVM functions specific to running on Book 3S
11 * processors in hypervisor mode (specifically POWER7 and later).
12 *
13 * This file is derived from arch/powerpc/kvm/book3s.c,
14 * by Alexander Graf <agraf@suse.de>.
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License, version 2, as
18 * published by the Free Software Foundation.
19 */
20
21#include <linux/kvm_host.h>
22#include <linux/err.h>
23#include <linux/slab.h>
24#include <linux/preempt.h>
174cd4b1 25#include <linux/sched/signal.h>
03441a34 26#include <linux/sched/stat.h>
de56a948 27#include <linux/delay.h>
66b15db6 28#include <linux/export.h>
de56a948
PM		 29#include <linux/fs.h>
30#include <linux/anon_inodes.h>
07f8ab25 31#include <linux/cpu.h>
de56a948 32#include <linux/cpumask.h>
aa04b4cc
PM		 33#include <linux/spinlock.h>
34#include <linux/page-flags.h>
2c9097e4 35#include <linux/srcu.h>
398a76c6 36#include <linux/miscdevice.h>
e23a808b 37#include <linux/debugfs.h>
de56a948
PM		 38
39#include <asm/reg.h>
40#include <asm/cputable.h>
41#include <asm/cacheflush.h>
42#include <asm/tlbflush.h>
7c0f6ba6 43#include <linux/uaccess.h>
de56a948
PM		 44#include <asm/io.h>
45#include <asm/kvm_ppc.h>
46#include <asm/kvm_book3s.h>
47#include <asm/mmu_context.h>
48#include <asm/lppaca.h>
49#include <asm/processor.h>
371fefd6 50#include <asm/cputhreads.h>
aa04b4cc 51#include <asm/page.h>
de1d9248 52#include <asm/hvcall.h>
ae3a197e 53#include <asm/switch_to.h>
512691d4 54#include <asm/smp.h>
66feed61 55#include <asm/dbell.h>
fd7bacbc 56#include <asm/hmi.h>
c57875f5 57#include <asm/pnv-pci.h>
7a84084c 58#include <asm/mmu.h>
f725758b
PM		 59#include <asm/opal.h>
60#include <asm/xics.h>
de56a948 61#include <linux/gfp.h>
de56a948
PM		 62#include <linux/vmalloc.h>
63#include <linux/highmem.h>
c77162de 64#include <linux/hugetlb.h>
c57875f5
SW		 65#include <linux/kvm_irqfd.h>
66#include <linux/irqbypass.h>
2ba9f0d8 67#include <linux/module.h>
7b5f8272 68#include <linux/compiler.h>
f725758b 69#include <linux/of.h>
de56a948 70
3a167bea
AK		 71#include "book3s.h"
72
3c78f78a
SW		 73#define CREATE_TRACE_POINTS
74#include "trace_hv.h"
75
de56a948
PM		 76/* #define EXIT_DEBUG */
77/* #define EXIT_DEBUG_SIMPLE */
78/* #define EXIT_DEBUG_INT */
79
913d3ff9
PM		 80/* Used to indicate that a guest page fault needs to be handled */
81#define RESUME_PAGE_FAULT (RESUME_GUEST | RESUME_FLAG_ARCH1)
f7af5209
SW		 82/* Used to indicate that a guest passthrough interrupt needs to be handled */
83#define RESUME_PASSTHROUGH (RESUME_GUEST | RESUME_FLAG_ARCH2)
913d3ff9 84
c7b67670
PM		 85/* Used as a "null" value for timebase values */
86#define TB_NIL (~(u64)0)
87
699a0ea0
PM		 88static DECLARE_BITMAP(default_enabled_hcalls, MAX_HCALL_OPCODE/4 + 1);
89
b4deba5c
PM		 90static int dynamic_mt_modes = 6;
91module_param(dynamic_mt_modes, int, S_IRUGO | S_IWUSR);
92MODULE_PARM_DESC(dynamic_mt_modes, "Set of allowed dynamic micro-threading modes: 0 (= none), 2, 4, or 6 (= 2 or 4)");
ec257165
PM		 93static int target_smt_mode;
94module_param(target_smt_mode, int, S_IRUGO | S_IWUSR);
95MODULE_PARM_DESC(target_smt_mode, "Target threads per core (0 = max)");
9678cdaa 96
520fe9c6
SW		 97#ifdef CONFIG_KVM_XICS
98static struct kernel_param_ops module_param_ops = {
99 .set = param_set_int,
100 .get = param_get_int,
101};
102
644abbb2
SW		 103module_param_cb(kvm_irq_bypass, &module_param_ops, &kvm_irq_bypass,
104 S_IRUGO | S_IWUSR);
105MODULE_PARM_DESC(kvm_irq_bypass, "Bypass passthrough interrupt optimization");
106
520fe9c6
SW		 107module_param_cb(h_ipi_redirect, &module_param_ops, &h_ipi_redirect,
108 S_IRUGO | S_IWUSR);
109MODULE_PARM_DESC(h_ipi_redirect, "Redirect H_IPI wakeup to a free host core");
110#endif
111
19ccb76a 112static void kvmppc_end_cede(struct kvm_vcpu *vcpu);
32fad281 113static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu);
19ccb76a 114
7b5f8272
SJS		 115static inline struct kvm_vcpu *next_runnable_thread(struct kvmppc_vcore *vc,
116 int *ip)
117{
118 int i = *ip;
119 struct kvm_vcpu *vcpu;
120
121 while (++i < MAX_SMT_THREADS) {
122 vcpu = READ_ONCE(vc->runnable_threads[i]);
123 if (vcpu) {
124 *ip = i;
125 return vcpu;
126 }
127 }
128 return NULL;
129}
130
131/* Used to traverse the list of runnable threads for a given vcore */
132#define for_each_runnable_thread(i, vcpu, vc) \
133 for (i = -1; (vcpu = next_runnable_thread(vc, &i)); )
134
66feed61
PM		 135static bool kvmppc_ipi_thread(int cpu)
136{
1704a81c
PM		 137 unsigned long msg = PPC_DBELL_TYPE(PPC_DBELL_SERVER);
138
139 /* On POWER9 we can use msgsnd to IPI any cpu */
140 if (cpu_has_feature(CPU_FTR_ARCH_300)) {
141 msg |= get_hard_smp_processor_id(cpu);
142 smp_mb();
143 __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
144 return true;
145 }
146
66feed61
PM		 147 /* On POWER8 for IPIs to threads in the same core, use msgsnd */
148 if (cpu_has_feature(CPU_FTR_ARCH_207S)) {
149 preempt_disable();
150 if (cpu_first_thread_sibling(cpu) ==
151 cpu_first_thread_sibling(smp_processor_id())) {
66feed61
PM		 152 msg |= cpu_thread_in_core(cpu);
153 smp_mb();
154 __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
155 preempt_enable();
156 return true;
157 }
158 preempt_enable();
159 }
160
161#if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP)
f725758b
PM		 162 if (cpu >= 0 && cpu < nr_cpu_ids) {
163 if (paca[cpu].kvm_hstate.xics_phys) {
164 xics_wake_cpu(cpu);
165 return true;
166 }
167 opal_int_set_mfrr(get_hard_smp_processor_id(cpu), IPI_PRIORITY);
66feed61
PM		 168 return true;
169 }
170#endif
171
172 return false;
173}
174
3a167bea 175static void kvmppc_fast_vcpu_kick_hv(struct kvm_vcpu *vcpu)
54695c30 176{
ec257165 177 int cpu;
8577370f 178 struct swait_queue_head *wqp;
54695c30
BH		 179
180 wqp = kvm_arch_vcpu_wq(vcpu);
8577370f
MT		 181 if (swait_active(wqp)) {
182 swake_up(wqp);
54695c30
BH		 183 ++vcpu->stat.halt_wakeup;
184 }
185
3deda5e5
PM		 186 cpu = READ_ONCE(vcpu->arch.thread_cpu);
187 if (cpu >= 0 && kvmppc_ipi_thread(cpu))
66feed61 188 return;
54695c30
BH		 189
190 /* CPU points to the first thread of the core */
ec257165 191 cpu = vcpu->cpu;
66feed61
PM		 192 if (cpu >= 0 && cpu < nr_cpu_ids && cpu_online(cpu))
193 smp_send_reschedule(cpu);
54695c30
BH		 194}
195
c7b67670
PM		 196/*
197 * We use the vcpu_load/put functions to measure stolen time.
198 * Stolen time is counted as time when either the vcpu is able to
199 * run as part of a virtual core, but the task running the vcore
200 * is preempted or sleeping, or when the vcpu needs something done
201 * in the kernel by the task running the vcpu, but that task is
202 * preempted or sleeping. Those two things have to be counted
203 * separately, since one of the vcpu tasks will take on the job
204 * of running the core, and the other vcpu tasks in the vcore will
205 * sleep waiting for it to do that, but that sleep shouldn't count
206 * as stolen time.
207 *
208 * Hence we accumulate stolen time when the vcpu can run as part of
209 * a vcore using vc->stolen_tb, and the stolen time when the vcpu
210 * needs its task to do other things in the kernel (for example,
211 * service a page fault) in busy_stolen. We don't accumulate
212 * stolen time for a vcore when it is inactive, or for a vcpu
213 * when it is in state RUNNING or NOTREADY. NOTREADY is a bit of
214 * a misnomer; it means that the vcpu task is not executing in
215 * the KVM_VCPU_RUN ioctl, i.e. it is in userspace or elsewhere in
216 * the kernel. We don't have any way of dividing up that time
217 * between time that the vcpu is genuinely stopped, time that
218 * the task is actively working on behalf of the vcpu, and time
219 * that the task is preempted, so we don't count any of it as
220 * stolen.
221 *
222 * Updates to busy_stolen are protected by arch.tbacct_lock;
2711e248
PM		 223 * updates to vc->stolen_tb are protected by the vcore->stoltb_lock
224 * lock. The stolen times are measured in units of timebase ticks.
225 * (Note that the != TB_NIL checks below are purely defensive;
226 * they should never fail.)
c7b67670
PM		 227 */
228
ec257165
PM		 229static void kvmppc_core_start_stolen(struct kvmppc_vcore *vc)
230{
231 unsigned long flags;
232
233 spin_lock_irqsave(&vc->stoltb_lock, flags);
234 vc->preempt_tb = mftb();
235 spin_unlock_irqrestore(&vc->stoltb_lock, flags);
236}
237
238static void kvmppc_core_end_stolen(struct kvmppc_vcore *vc)
239{
240 unsigned long flags;
241
242 spin_lock_irqsave(&vc->stoltb_lock, flags);
243 if (vc->preempt_tb != TB_NIL) {
244 vc->stolen_tb += mftb() - vc->preempt_tb;
245 vc->preempt_tb = TB_NIL;
246 }
247 spin_unlock_irqrestore(&vc->stoltb_lock, flags);
248}
249
3a167bea 250static void kvmppc_core_vcpu_load_hv(struct kvm_vcpu *vcpu, int cpu)
de56a948 251{
0456ec4f 252 struct kvmppc_vcore *vc = vcpu->arch.vcore;
bf3d32e1 253 unsigned long flags;
0456ec4f 254
2711e248
PM		 255 /*
256 * We can test vc->runner without taking the vcore lock,
257 * because only this task ever sets vc->runner to this
258 * vcpu, and once it is set to this vcpu, only this task
259 * ever sets it to NULL.
260 */
ec257165
PM		 261 if (vc->runner == vcpu && vc->vcore_state >= VCORE_SLEEPING)
262 kvmppc_core_end_stolen(vc);
263
2711e248 264 spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags);
c7b67670
PM		 265 if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST &&
266 vcpu->arch.busy_preempt != TB_NIL) {
267 vcpu->arch.busy_stolen += mftb() - vcpu->arch.busy_preempt;
268 vcpu->arch.busy_preempt = TB_NIL;
269 }
bf3d32e1 270 spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags);
de56a948
PM		 271}
272
3a167bea 273static void kvmppc_core_vcpu_put_hv(struct kvm_vcpu *vcpu)
de56a948 274{
0456ec4f 275 struct kvmppc_vcore *vc = vcpu->arch.vcore;
bf3d32e1 276 unsigned long flags;
0456ec4f 277
ec257165
PM		 278 if (vc->runner == vcpu && vc->vcore_state >= VCORE_SLEEPING)
279 kvmppc_core_start_stolen(vc);
280
2711e248 281 spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags);
c7b67670
PM		 282 if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST)
283 vcpu->arch.busy_preempt = mftb();
bf3d32e1 284 spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags);
de56a948
PM		 285}
286
3a167bea 287static void kvmppc_set_msr_hv(struct kvm_vcpu *vcpu, u64 msr)
de56a948 288{
c20875a3
PM		 289 /*
290 * Check for illegal transactional state bit combination
291 * and if we find it, force the TS field to a safe state.
292 */
293 if ((msr & MSR_TS_MASK) == MSR_TS_MASK)
294 msr &= ~MSR_TS_MASK;
de56a948 295 vcpu->arch.shregs.msr = msr;
19ccb76a 296 kvmppc_end_cede(vcpu);
de56a948
PM		 297}
298
5358a963 299static void kvmppc_set_pvr_hv(struct kvm_vcpu *vcpu, u32 pvr)
de56a948
PM		 300{
301 vcpu->arch.pvr = pvr;
302}
303
2ee13be3
SJS		 304/* Dummy value used in computing PCR value below */
305#define PCR_ARCH_300 (PCR_ARCH_207 << 1)
306
5358a963 307static int kvmppc_set_arch_compat(struct kvm_vcpu *vcpu, u32 arch_compat)
388cc6e1 308{
2ee13be3 309 unsigned long host_pcr_bit = 0, guest_pcr_bit = 0;
388cc6e1
PM		 310 struct kvmppc_vcore *vc = vcpu->arch.vcore;
311
2ee13be3
SJS		 312 /* We can (emulate) our own architecture version and anything older */
313 if (cpu_has_feature(CPU_FTR_ARCH_300))
314 host_pcr_bit = PCR_ARCH_300;
315 else if (cpu_has_feature(CPU_FTR_ARCH_207S))
316 host_pcr_bit = PCR_ARCH_207;
317 else if (cpu_has_feature(CPU_FTR_ARCH_206))
318 host_pcr_bit = PCR_ARCH_206;
319 else
320 host_pcr_bit = PCR_ARCH_205;
321
322 /* Determine lowest PCR bit needed to run guest in given PVR level */
323 guest_pcr_bit = host_pcr_bit;
388cc6e1 324 if (arch_compat) {
388cc6e1
PM		 325 switch (arch_compat) {
326 case PVR_ARCH_205:
2ee13be3 327 guest_pcr_bit = PCR_ARCH_205;
388cc6e1
PM		 328 break;
329 case PVR_ARCH_206:
330 case PVR_ARCH_206p:
2ee13be3 331 guest_pcr_bit = PCR_ARCH_206;
5557ae0e
PM		 332 break;
333 case PVR_ARCH_207:
2ee13be3
SJS		 334 guest_pcr_bit = PCR_ARCH_207;
335 break;
336 case PVR_ARCH_300:
337 guest_pcr_bit = PCR_ARCH_300;
388cc6e1
PM		 338 break;
339 default:
340 return -EINVAL;
341 }
342 }
343
2ee13be3
SJS		 344 /* Check requested PCR bits don't exceed our capabilities */
345 if (guest_pcr_bit > host_pcr_bit)
346 return -EINVAL;
347
388cc6e1
PM		 348 spin_lock(&vc->lock);
349 vc->arch_compat = arch_compat;
2ee13be3
SJS		 350 /* Set all PCR bits for which guest_pcr_bit <= bit < host_pcr_bit */
351 vc->pcr = host_pcr_bit - guest_pcr_bit;
388cc6e1
PM		 352 spin_unlock(&vc->lock);
353
354 return 0;
355}
356
5358a963 357static void kvmppc_dump_regs(struct kvm_vcpu *vcpu)
de56a948
PM		 358{
359 int r;
360
361 pr_err("vcpu %p (%d):\n", vcpu, vcpu->vcpu_id);
362 pr_err("pc = %.16lx msr = %.16llx trap = %x\n",
363 vcpu->arch.pc, vcpu->arch.shregs.msr, vcpu->arch.trap);
364 for (r = 0; r < 16; ++r)
365 pr_err("r%2d = %.16lx r%d = %.16lx\n",
366 r, kvmppc_get_gpr(vcpu, r),
367 r+16, kvmppc_get_gpr(vcpu, r+16));
368 pr_err("ctr = %.16lx lr = %.16lx\n",
369 vcpu->arch.ctr, vcpu->arch.lr);
370 pr_err("srr0 = %.16llx srr1 = %.16llx\n",
371 vcpu->arch.shregs.srr0, vcpu->arch.shregs.srr1);
372 pr_err("sprg0 = %.16llx sprg1 = %.16llx\n",
373 vcpu->arch.shregs.sprg0, vcpu->arch.shregs.sprg1);
374 pr_err("sprg2 = %.16llx sprg3 = %.16llx\n",
375 vcpu->arch.shregs.sprg2, vcpu->arch.shregs.sprg3);
376 pr_err("cr = %.8x xer = %.16lx dsisr = %.8x\n",
377 vcpu->arch.cr, vcpu->arch.xer, vcpu->arch.shregs.dsisr);
378 pr_err("dar = %.16llx\n", vcpu->arch.shregs.dar);
379 pr_err("fault dar = %.16lx dsisr = %.8x\n",
380 vcpu->arch.fault_dar, vcpu->arch.fault_dsisr);
381 pr_err("SLB (%d entries):\n", vcpu->arch.slb_max);
382 for (r = 0; r < vcpu->arch.slb_max; ++r)
383 pr_err(" ESID = %.16llx VSID = %.16llx\n",
384 vcpu->arch.slb[r].orige, vcpu->arch.slb[r].origv);
385 pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n",
a0144e2a 386 vcpu->arch.vcore->lpcr, vcpu->kvm->arch.sdr1,
de56a948
PM		 387 vcpu->arch.last_inst);
388}
389
5358a963 390static struct kvm_vcpu *kvmppc_find_vcpu(struct kvm *kvm, int id)
a8606e20 391{
e09fefde 392 struct kvm_vcpu *ret;
a8606e20
PM		 393
394 mutex_lock(&kvm->lock);
e09fefde 395 ret = kvm_get_vcpu_by_id(kvm, id);
a8606e20
PM		 396 mutex_unlock(&kvm->lock);
397 return ret;
398}
399
400static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa)
401{
f13c13a0 402 vpa->__old_status |= LPPACA_OLD_SHARED_PROC;
02407552 403 vpa->yield_count = cpu_to_be32(1);
a8606e20
PM		 404}
405
55b665b0
PM		 406static int set_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *v,
407 unsigned long addr, unsigned long len)
408{
409 /* check address is cacheline aligned */
410 if (addr & (L1_CACHE_BYTES - 1))
411 return -EINVAL;
412 spin_lock(&vcpu->arch.vpa_update_lock);
413 if (v->next_gpa != addr || v->len != len) {
414 v->next_gpa = addr;
415 v->len = addr ? len : 0;
416 v->update_pending = 1;
417 }
418 spin_unlock(&vcpu->arch.vpa_update_lock);
419 return 0;
420}
421
2e25aa5f
PM		 422/* Length for a per-processor buffer is passed in at offset 4 in the buffer */
423struct reg_vpa {
424 u32 dummy;
425 union {
02407552
AG		 426 __be16 hword;
427 __be32 word;
2e25aa5f
PM		 428 } length;
429};
430
431static int vpa_is_registered(struct kvmppc_vpa *vpap)
432{
433 if (vpap->update_pending)
434 return vpap->next_gpa != 0;
435 return vpap->pinned_addr != NULL;
436}
437
a8606e20
PM		 438static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu,
439 unsigned long flags,
440 unsigned long vcpuid, unsigned long vpa)
441{
442 struct kvm *kvm = vcpu->kvm;
93e60249 443 unsigned long len, nb;
a8606e20
PM		 444 void *va;
445 struct kvm_vcpu *tvcpu;
2e25aa5f
PM		 446 int err;
447 int subfunc;
448 struct kvmppc_vpa *vpap;
a8606e20
PM		 449
450 tvcpu = kvmppc_find_vcpu(kvm, vcpuid);
451 if (!tvcpu)
452 return H_PARAMETER;
453
2e25aa5f
PM		 454 subfunc = (flags >> H_VPA_FUNC_SHIFT) & H_VPA_FUNC_MASK;
455 if (subfunc == H_VPA_REG_VPA || subfunc == H_VPA_REG_DTL ||
456 subfunc == H_VPA_REG_SLB) {
457 /* Registering new area - address must be cache-line aligned */
458 if ((vpa & (L1_CACHE_BYTES - 1)) || !vpa)
a8606e20 459 return H_PARAMETER;
2e25aa5f
PM		 460
461 /* convert logical addr to kernel addr and read length */
93e60249
PM		 462 va = kvmppc_pin_guest_page(kvm, vpa, &nb);
463 if (va == NULL)
b2b2f165 464 return H_PARAMETER;
2e25aa5f 465 if (subfunc == H_VPA_REG_VPA)
02407552 466 len = be16_to_cpu(((struct reg_vpa *)va)->length.hword);
a8606e20 467 else
02407552 468 len = be32_to_cpu(((struct reg_vpa *)va)->length.word);
c35635ef 469 kvmppc_unpin_guest_page(kvm, va, vpa, false);
2e25aa5f
PM		 470
471 /* Check length */
472 if (len > nb || len < sizeof(struct reg_vpa))
473 return H_PARAMETER;
474 } else {
475 vpa = 0;
476 len = 0;
477 }
478
479 err = H_PARAMETER;
480 vpap = NULL;
481 spin_lock(&tvcpu->arch.vpa_update_lock);
482
483 switch (subfunc) {
484 case H_VPA_REG_VPA: /* register VPA */
485 if (len < sizeof(struct lppaca))
a8606e20 486 break;
2e25aa5f
PM		 487 vpap = &tvcpu->arch.vpa;
488 err = 0;
489 break;
490
491 case H_VPA_REG_DTL: /* register DTL */
492 if (len < sizeof(struct dtl_entry))
a8606e20 493 break;
2e25aa5f
PM		 494 len -= len % sizeof(struct dtl_entry);
495
496 /* Check that they have previously registered a VPA */
497 err = H_RESOURCE;
498 if (!vpa_is_registered(&tvcpu->arch.vpa))
a8606e20 499 break;
2e25aa5f
PM		 500
501 vpap = &tvcpu->arch.dtl;
502 err = 0;
503 break;
504
505 case H_VPA_REG_SLB: /* register SLB shadow buffer */
506 /* Check that they have previously registered a VPA */
507 err = H_RESOURCE;
508 if (!vpa_is_registered(&tvcpu->arch.vpa))
a8606e20 509 break;
2e25aa5f
PM		 510
511 vpap = &tvcpu->arch.slb_shadow;
512 err = 0;
513 break;
514
515 case H_VPA_DEREG_VPA: /* deregister VPA */
516 /* Check they don't still have a DTL or SLB buf registered */
517 err = H_RESOURCE;
518 if (vpa_is_registered(&tvcpu->arch.dtl) ||
519 vpa_is_registered(&tvcpu->arch.slb_shadow))
a8606e20 520 break;
2e25aa5f
PM		 521
522 vpap = &tvcpu->arch.vpa;
523 err = 0;
524 break;
525
526 case H_VPA_DEREG_DTL: /* deregister DTL */
527 vpap = &tvcpu->arch.dtl;
528 err = 0;
529 break;
530
531 case H_VPA_DEREG_SLB: /* deregister SLB shadow buffer */
532 vpap = &tvcpu->arch.slb_shadow;
533 err = 0;
534 break;
535 }
536
537 if (vpap) {
538 vpap->next_gpa = vpa;
539 vpap->len = len;
540 vpap->update_pending = 1;
a8606e20 541 }
93e60249 542
2e25aa5f
PM		 543 spin_unlock(&tvcpu->arch.vpa_update_lock);
544
93e60249 545 return err;
a8606e20
PM		 546}
547
081f323b 548static void kvmppc_update_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *vpap)
2e25aa5f 549{
081f323b 550 struct kvm *kvm = vcpu->kvm;
2e25aa5f
PM		 551 void *va;
552 unsigned long nb;
081f323b 553 unsigned long gpa;
2e25aa5f 554
081f323b
PM		 555 /*
556 * We need to pin the page pointed to by vpap->next_gpa,
557 * but we can't call kvmppc_pin_guest_page under the lock
558 * as it does get_user_pages() and down_read(). So we
559 * have to drop the lock, pin the page, then get the lock
560 * again and check that a new area didn't get registered
561 * in the meantime.
562 */
563 for (;;) {
564 gpa = vpap->next_gpa;
565 spin_unlock(&vcpu->arch.vpa_update_lock);
566 va = NULL;
567 nb = 0;
568 if (gpa)
c35635ef 569 va = kvmppc_pin_guest_page(kvm, gpa, &nb);
081f323b
PM		 570 spin_lock(&vcpu->arch.vpa_update_lock);
571 if (gpa == vpap->next_gpa)
572 break;
573 /* sigh... unpin that one and try again */
574 if (va)
c35635ef 575 kvmppc_unpin_guest_page(kvm, va, gpa, false);
081f323b
PM		 576 }
577
578 vpap->update_pending = 0;
579 if (va && nb < vpap->len) {
580 /*
581 * If it's now too short, it must be that userspace
582 * has changed the mappings underlying guest memory,
583 * so unregister the region.
584 */
c35635ef 585 kvmppc_unpin_guest_page(kvm, va, gpa, false);
081f323b 586 va = NULL;
2e25aa5f
PM		 587 }
588 if (vpap->pinned_addr)
c35635ef
PM		 589 kvmppc_unpin_guest_page(kvm, vpap->pinned_addr, vpap->gpa,
590 vpap->dirty);
591 vpap->gpa = gpa;
2e25aa5f 592 vpap->pinned_addr = va;
c35635ef 593 vpap->dirty = false;
2e25aa5f
PM		 594 if (va)
595 vpap->pinned_end = va + vpap->len;
596}
597
598static void kvmppc_update_vpas(struct kvm_vcpu *vcpu)
599{
2f12f034
PM		 600 if (!(vcpu->arch.vpa.update_pending ||
601 vcpu->arch.slb_shadow.update_pending ||
602 vcpu->arch.dtl.update_pending))
603 return;
604
2e25aa5f
PM		 605 spin_lock(&vcpu->arch.vpa_update_lock);
606 if (vcpu->arch.vpa.update_pending) {
081f323b 607 kvmppc_update_vpa(vcpu, &vcpu->arch.vpa);
55b665b0
PM		 608 if (vcpu->arch.vpa.pinned_addr)
609 init_vpa(vcpu, vcpu->arch.vpa.pinned_addr);
2e25aa5f
PM		 610 }
611 if (vcpu->arch.dtl.update_pending) {
081f323b 612 kvmppc_update_vpa(vcpu, &vcpu->arch.dtl);
2e25aa5f
PM		 613 vcpu->arch.dtl_ptr = vcpu->arch.dtl.pinned_addr;
614 vcpu->arch.dtl_index = 0;
615 }
616 if (vcpu->arch.slb_shadow.update_pending)
081f323b 617 kvmppc_update_vpa(vcpu, &vcpu->arch.slb_shadow);
2e25aa5f
PM		 618 spin_unlock(&vcpu->arch.vpa_update_lock);
619}
620
c7b67670
PM		 621/*
622 * Return the accumulated stolen time for the vcore up until `now'.
623 * The caller should hold the vcore lock.
624 */
625static u64 vcore_stolen_time(struct kvmppc_vcore *vc, u64 now)
626{
627 u64 p;
2711e248 628 unsigned long flags;
c7b67670 629
2711e248
PM		 630 spin_lock_irqsave(&vc->stoltb_lock, flags);
631 p = vc->stolen_tb;
c7b67670 632 if (vc->vcore_state != VCORE_INACTIVE &&
2711e248
PM		 633 vc->preempt_tb != TB_NIL)
634 p += now - vc->preempt_tb;
635 spin_unlock_irqrestore(&vc->stoltb_lock, flags);
c7b67670
PM		 636 return p;
637}
638
0456ec4f
PM		 639static void kvmppc_create_dtl_entry(struct kvm_vcpu *vcpu,
640 struct kvmppc_vcore *vc)
641{
642 struct dtl_entry *dt;
643 struct lppaca *vpa;
c7b67670
PM		 644 unsigned long stolen;
645 unsigned long core_stolen;
646 u64 now;
0456ec4f
PM		 647
648 dt = vcpu->arch.dtl_ptr;
649 vpa = vcpu->arch.vpa.pinned_addr;
c7b67670
PM		 650 now = mftb();
651 core_stolen = vcore_stolen_time(vc, now);
652 stolen = core_stolen - vcpu->arch.stolen_logged;
653 vcpu->arch.stolen_logged = core_stolen;
bf3d32e1 654 spin_lock_irq(&vcpu->arch.tbacct_lock);
c7b67670
PM		 655 stolen += vcpu->arch.busy_stolen;
656 vcpu->arch.busy_stolen = 0;
bf3d32e1 657 spin_unlock_irq(&vcpu->arch.tbacct_lock);
0456ec4f
PM		 658 if (!dt || !vpa)
659 return;
660 memset(dt, 0, sizeof(struct dtl_entry));
661 dt->dispatch_reason = 7;
02407552
AG		 662 dt->processor_id = cpu_to_be16(vc->pcpu + vcpu->arch.ptid);
663 dt->timebase = cpu_to_be64(now + vc->tb_offset);
664 dt->enqueue_to_dispatch_time = cpu_to_be32(stolen);
665 dt->srr0 = cpu_to_be64(kvmppc_get_pc(vcpu));
666 dt->srr1 = cpu_to_be64(vcpu->arch.shregs.msr);
0456ec4f
PM		 667 ++dt;
668 if (dt == vcpu->arch.dtl.pinned_end)
669 dt = vcpu->arch.dtl.pinned_addr;
670 vcpu->arch.dtl_ptr = dt;
671 /* order writing *dt vs. writing vpa->dtl_idx */
672 smp_wmb();
02407552 673 vpa->dtl_idx = cpu_to_be64(++vcpu->arch.dtl_index);
c35635ef 674 vcpu->arch.dtl.dirty = true;
0456ec4f
PM		 675}
676
9642382e
MN		 677static bool kvmppc_power8_compatible(struct kvm_vcpu *vcpu)
678{
679 if (vcpu->arch.vcore->arch_compat >= PVR_ARCH_207)
680 return true;
681 if ((!vcpu->arch.vcore->arch_compat) &&
682 cpu_has_feature(CPU_FTR_ARCH_207S))
683 return true;
684 return false;
685}
686
687static int kvmppc_h_set_mode(struct kvm_vcpu *vcpu, unsigned long mflags,
688 unsigned long resource, unsigned long value1,
689 unsigned long value2)
690{
691 switch (resource) {
692 case H_SET_MODE_RESOURCE_SET_CIABR:
693 if (!kvmppc_power8_compatible(vcpu))
694 return H_P2;
695 if (value2)
696 return H_P4;
697 if (mflags)
698 return H_UNSUPPORTED_FLAG_START;
699 /* Guests can't breakpoint the hypervisor */
700 if ((value1 & CIABR_PRIV) == CIABR_PRIV_HYPER)
701 return H_P3;
702 vcpu->arch.ciabr = value1;
703 return H_SUCCESS;
704 case H_SET_MODE_RESOURCE_SET_DAWR:
705 if (!kvmppc_power8_compatible(vcpu))
706 return H_P2;
707 if (mflags)
708 return H_UNSUPPORTED_FLAG_START;
709 if (value2 & DABRX_HYP)
710 return H_P4;
711 vcpu->arch.dawr = value1;
712 vcpu->arch.dawrx = value2;
713 return H_SUCCESS;
714 default:
715 return H_TOO_HARD;
716 }
717}
718
90fd09f8
SB		 719static int kvm_arch_vcpu_yield_to(struct kvm_vcpu *target)
720{
721 struct kvmppc_vcore *vcore = target->arch.vcore;
722
723 /*
724 * We expect to have been called by the real mode handler
725 * (kvmppc_rm_h_confer()) which would have directly returned
726 * H_SUCCESS if the source vcore wasn't idle (e.g. if it may
727 * have useful work to do and should not confer) so we don't
728 * recheck that here.
729 */
730
731 spin_lock(&vcore->lock);
732 if (target->arch.state == KVMPPC_VCPU_RUNNABLE &&
ec257165
PM		 733 vcore->vcore_state != VCORE_INACTIVE &&
734 vcore->runner)
90fd09f8
SB		 735 target = vcore->runner;
736 spin_unlock(&vcore->lock);
737
738 return kvm_vcpu_yield_to(target);
739}
740
741static int kvmppc_get_yield_count(struct kvm_vcpu *vcpu)
742{
743 int yield_count = 0;
744 struct lppaca *lppaca;
745
746 spin_lock(&vcpu->arch.vpa_update_lock);
747 lppaca = (struct lppaca *)vcpu->arch.vpa.pinned_addr;
748 if (lppaca)
ecb6d618 749 yield_count = be32_to_cpu(lppaca->yield_count);
90fd09f8
SB		 750 spin_unlock(&vcpu->arch.vpa_update_lock);
751 return yield_count;
752}
753
a8606e20
PM		 754int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu)
755{
756 unsigned long req = kvmppc_get_gpr(vcpu, 3);
757 unsigned long target, ret = H_SUCCESS;
90fd09f8 758 int yield_count;
a8606e20 759 struct kvm_vcpu *tvcpu;
8e591cb7 760 int idx, rc;
a8606e20 761
699a0ea0
PM		 762 if (req <= MAX_HCALL_OPCODE &&
763 !test_bit(req/4, vcpu->kvm->arch.enabled_hcalls))
764 return RESUME_HOST;
765
a8606e20
PM		 766 switch (req) {
767 case H_CEDE:
a8606e20
PM		 768 break;
769 case H_PROD:
770 target = kvmppc_get_gpr(vcpu, 4);
771 tvcpu = kvmppc_find_vcpu(vcpu->kvm, target);
772 if (!tvcpu) {
773 ret = H_PARAMETER;
774 break;
775 }
776 tvcpu->arch.prodded = 1;
777 smp_mb();
8464c884
PM		 778 if (tvcpu->arch.ceded)
779 kvmppc_fast_vcpu_kick_hv(tvcpu);
a8606e20
PM		 780 break;
781 case H_CONFER:
42d7604d
PM		 782 target = kvmppc_get_gpr(vcpu, 4);
783 if (target == -1)
784 break;
785 tvcpu = kvmppc_find_vcpu(vcpu->kvm, target);
786 if (!tvcpu) {
787 ret = H_PARAMETER;
788 break;
789 }
90fd09f8
SB		 790 yield_count = kvmppc_get_gpr(vcpu, 5);
791 if (kvmppc_get_yield_count(tvcpu) != yield_count)
792 break;
793 kvm_arch_vcpu_yield_to(tvcpu);
a8606e20
PM		 794 break;
795 case H_REGISTER_VPA:
796 ret = do_h_register_vpa(vcpu, kvmppc_get_gpr(vcpu, 4),
797 kvmppc_get_gpr(vcpu, 5),
798 kvmppc_get_gpr(vcpu, 6));
799 break;
8e591cb7
ME		 800 case H_RTAS:
801 if (list_empty(&vcpu->kvm->arch.rtas_tokens))
802 return RESUME_HOST;
803
c9438092 804 idx = srcu_read_lock(&vcpu->kvm->srcu);
8e591cb7 805 rc = kvmppc_rtas_hcall(vcpu);
c9438092 806 srcu_read_unlock(&vcpu->kvm->srcu, idx);
8e591cb7
ME		 807
808 if (rc == -ENOENT)
809 return RESUME_HOST;
810 else if (rc == 0)
811 break;
812
813 /* Send the error out to userspace via KVM_RUN */
814 return rc;
99342cf8
DG		 815 case H_LOGICAL_CI_LOAD:
816 ret = kvmppc_h_logical_ci_load(vcpu);
817 if (ret == H_TOO_HARD)
818 return RESUME_HOST;
819 break;
820 case H_LOGICAL_CI_STORE:
821 ret = kvmppc_h_logical_ci_store(vcpu);
822 if (ret == H_TOO_HARD)
823 return RESUME_HOST;
824 break;
9642382e
MN		 825 case H_SET_MODE:
826 ret = kvmppc_h_set_mode(vcpu, kvmppc_get_gpr(vcpu, 4),
827 kvmppc_get_gpr(vcpu, 5),
828 kvmppc_get_gpr(vcpu, 6),
829 kvmppc_get_gpr(vcpu, 7));
830 if (ret == H_TOO_HARD)
831 return RESUME_HOST;
832 break;
bc5ad3f3
BH		 833 case H_XIRR:
834 case H_CPPR:
835 case H_EOI:
836 case H_IPI:
8e44ddc3
PM		 837 case H_IPOLL:
838 case H_XIRR_X:
bc5ad3f3
BH		 839 if (kvmppc_xics_enabled(vcpu)) {
840 ret = kvmppc_xics_hcall(vcpu, req);
841 break;
d3695aa4
AK		 842 }
843 return RESUME_HOST;
844 case H_PUT_TCE:
845 ret = kvmppc_h_put_tce(vcpu, kvmppc_get_gpr(vcpu, 4),
846 kvmppc_get_gpr(vcpu, 5),
847 kvmppc_get_gpr(vcpu, 6));
848 if (ret == H_TOO_HARD)
849 return RESUME_HOST;
850 break;
851 case H_PUT_TCE_INDIRECT:
852 ret = kvmppc_h_put_tce_indirect(vcpu, kvmppc_get_gpr(vcpu, 4),
853 kvmppc_get_gpr(vcpu, 5),
854 kvmppc_get_gpr(vcpu, 6),
855 kvmppc_get_gpr(vcpu, 7));
856 if (ret == H_TOO_HARD)
857 return RESUME_HOST;
858 break;
859 case H_STUFF_TCE:
860 ret = kvmppc_h_stuff_tce(vcpu, kvmppc_get_gpr(vcpu, 4),
861 kvmppc_get_gpr(vcpu, 5),
862 kvmppc_get_gpr(vcpu, 6),
863 kvmppc_get_gpr(vcpu, 7));
864 if (ret == H_TOO_HARD)
865 return RESUME_HOST;
866 break;
a8606e20
PM		 867 default:
868 return RESUME_HOST;
869 }
870 kvmppc_set_gpr(vcpu, 3, ret);
871 vcpu->arch.hcall_needed = 0;
872 return RESUME_GUEST;
873}
874
ae2113a4
PM		 875static int kvmppc_hcall_impl_hv(unsigned long cmd)
876{
877 switch (cmd) {
878 case H_CEDE:
879 case H_PROD:
880 case H_CONFER:
881 case H_REGISTER_VPA:
9642382e 882 case H_SET_MODE:
99342cf8
DG		 883 case H_LOGICAL_CI_LOAD:
884 case H_LOGICAL_CI_STORE:
ae2113a4
PM		 885#ifdef CONFIG_KVM_XICS
886 case H_XIRR:
887 case H_CPPR:
888 case H_EOI:
889 case H_IPI:
890 case H_IPOLL:
891 case H_XIRR_X:
892#endif
893 return 1;
894 }
895
896 /* See if it's in the real-mode table */
897 return kvmppc_hcall_impl_hv_realmode(cmd);
898}
899
a59c1d9e
MS		 900static int kvmppc_emulate_debug_inst(struct kvm_run *run,
901 struct kvm_vcpu *vcpu)
902{
903 u32 last_inst;
904
905 if (kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst) !=
906 EMULATE_DONE) {
907 /*
908 * Fetch failed, so return to guest and
909 * try executing it again.
910 */
911 return RESUME_GUEST;
912 }
913
914 if (last_inst == KVMPPC_INST_SW_BREAKPOINT) {
915 run->exit_reason = KVM_EXIT_DEBUG;
916 run->debug.arch.address = kvmppc_get_pc(vcpu);
917 return RESUME_HOST;
918 } else {
919 kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
920 return RESUME_GUEST;
921 }
922}
923
3a167bea
AK		 924static int kvmppc_handle_exit_hv(struct kvm_run *run, struct kvm_vcpu *vcpu,
925 struct task_struct *tsk)
de56a948
PM		 926{
927 int r = RESUME_HOST;
928
929 vcpu->stat.sum_exits++;
930
1c9e3d51
PM		 931 /*
932 * This can happen if an interrupt occurs in the last stages
933 * of guest entry or the first stages of guest exit (i.e. after
934 * setting paca->kvm_hstate.in_guest to KVM_GUEST_MODE_GUEST_HV
935 * and before setting it to KVM_GUEST_MODE_HOST_HV).
936 * That can happen due to a bug, or due to a machine check
937 * occurring at just the wrong time.
938 */
939 if (vcpu->arch.shregs.msr & MSR_HV) {
940 printk(KERN_EMERG "KVM trap in HV mode!\n");
941 printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n",
942 vcpu->arch.trap, kvmppc_get_pc(vcpu),
943 vcpu->arch.shregs.msr);
944 kvmppc_dump_regs(vcpu);
945 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
946 run->hw.hardware_exit_reason = vcpu->arch.trap;
947 return RESUME_HOST;
948 }
de56a948
PM		 949 run->exit_reason = KVM_EXIT_UNKNOWN;
950 run->ready_for_interrupt_injection = 1;
951 switch (vcpu->arch.trap) {
952 /* We're good on these - the host merely wanted to get our attention */
953 case BOOK3S_INTERRUPT_HV_DECREMENTER:
954 vcpu->stat.dec_exits++;
955 r = RESUME_GUEST;
956 break;
957 case BOOK3S_INTERRUPT_EXTERNAL:
5d00f66b 958 case BOOK3S_INTERRUPT_H_DOORBELL:
84f7139c 959 case BOOK3S_INTERRUPT_H_VIRT:
de56a948
PM		 960 vcpu->stat.ext_intr_exits++;
961 r = RESUME_GUEST;
962 break;
dee6f24c
MS		 963 /* HMI is hypervisor interrupt and host has handled it. Resume guest.*/
964 case BOOK3S_INTERRUPT_HMI:
de56a948
PM		 965 case BOOK3S_INTERRUPT_PERFMON:
966 r = RESUME_GUEST;
967 break;
b4072df4
PM		 968 case BOOK3S_INTERRUPT_MACHINE_CHECK:
969 /*
970 * Deliver a machine check interrupt to the guest.
971 * We have to do this, even if the host has handled the
972 * machine check, because machine checks use SRR0/1 and
973 * the interrupt might have trashed guest state in them.
974 */
975 kvmppc_book3s_queue_irqprio(vcpu,
976 BOOK3S_INTERRUPT_MACHINE_CHECK);
977 r = RESUME_GUEST;
978 break;
de56a948
PM		 979 case BOOK3S_INTERRUPT_PROGRAM:
980 {
981 ulong flags;
982 /*
983 * Normally program interrupts are delivered directly
984 * to the guest by the hardware, but we can get here
985 * as a result of a hypervisor emulation interrupt
986 * (e40) getting turned into a 700 by BML RTAS.
987 */
988 flags = vcpu->arch.shregs.msr & 0x1f0000ull;
989 kvmppc_core_queue_program(vcpu, flags);
990 r = RESUME_GUEST;
991 break;
992 }
993 case BOOK3S_INTERRUPT_SYSCALL:
994 {
995 /* hcall - punt to userspace */
996 int i;
997
27025a60
LPF		 998 /* hypercall with MSR_PR has already been handled in rmode,
999 * and never reaches here.
1000 */
1001
de56a948
PM		 1002 run->papr_hcall.nr = kvmppc_get_gpr(vcpu, 3);
1003 for (i = 0; i < 9; ++i)
1004 run->papr_hcall.args[i] = kvmppc_get_gpr(vcpu, 4 + i);
1005 run->exit_reason = KVM_EXIT_PAPR_HCALL;
1006 vcpu->arch.hcall_needed = 1;
1007 r = RESUME_HOST;
1008 break;
1009 }
1010 /*
342d3db7
PM		 1011 * We get these next two if the guest accesses a page which it thinks
1012 * it has mapped but which is not actually present, either because
1013 * it is for an emulated I/O device or because the corresonding
1014 * host page has been paged out. Any other HDSI/HISI interrupts
1015 * have been handled already.
de56a948
PM		 1016 */
1017 case BOOK3S_INTERRUPT_H_DATA_STORAGE:
913d3ff9 1018 r = RESUME_PAGE_FAULT;
de56a948
PM		 1019 break;
1020 case BOOK3S_INTERRUPT_H_INST_STORAGE:
913d3ff9
PM		 1021 vcpu->arch.fault_dar = kvmppc_get_pc(vcpu);
1022 vcpu->arch.fault_dsisr = 0;
1023 r = RESUME_PAGE_FAULT;
de56a948
PM		 1024 break;
1025 /*
1026 * This occurs if the guest executes an illegal instruction.
a59c1d9e
MS		 1027 * If the guest debug is disabled, generate a program interrupt
1028 * to the guest. If guest debug is enabled, we need to check
1029 * whether the instruction is a software breakpoint instruction.
1030 * Accordingly return to Guest or Host.
de56a948
PM		 1031 */
1032 case BOOK3S_INTERRUPT_H_EMUL_ASSIST:
4a157d61
PM		 1033 if (vcpu->arch.emul_inst != KVM_INST_FETCH_FAILED)
1034 vcpu->arch.last_inst = kvmppc_need_byteswap(vcpu) ?
1035 swab32(vcpu->arch.emul_inst) :
1036 vcpu->arch.emul_inst;
a59c1d9e
MS		 1037 if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) {
1038 r = kvmppc_emulate_debug_inst(run, vcpu);
1039 } else {
1040 kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
1041 r = RESUME_GUEST;
1042 }
bd3048b8
ME		 1043 break;
1044 /*
1045 * This occurs if the guest (kernel or userspace), does something that
1046 * is prohibited by HFSCR. We just generate a program interrupt to
1047 * the guest.
1048 */
1049 case BOOK3S_INTERRUPT_H_FAC_UNAVAIL:
1050 kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
de56a948
PM		 1051 r = RESUME_GUEST;
1052 break;
f7af5209
SW		 1053 case BOOK3S_INTERRUPT_HV_RM_HARD:
1054 r = RESUME_PASSTHROUGH;
1055 break;
de56a948
PM		 1056 default:
1057 kvmppc_dump_regs(vcpu);
1058 printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n",
1059 vcpu->arch.trap, kvmppc_get_pc(vcpu),
1060 vcpu->arch.shregs.msr);
f3271d4c 1061 run->hw.hardware_exit_reason = vcpu->arch.trap;
de56a948 1062 r = RESUME_HOST;
de56a948
PM		 1063 break;
1064 }
1065
de56a948
PM		 1066 return r;
1067}
1068
3a167bea
AK		 1069static int kvm_arch_vcpu_ioctl_get_sregs_hv(struct kvm_vcpu *vcpu,
1070 struct kvm_sregs *sregs)
de56a948
PM		 1071{
1072 int i;
1073
de56a948 1074 memset(sregs, 0, sizeof(struct kvm_sregs));
87916442 1075 sregs->pvr = vcpu->arch.pvr;
de56a948
PM		 1076 for (i = 0; i < vcpu->arch.slb_max; i++) {
1077 sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige;
1078 sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv;
1079 }
1080
1081 return 0;
1082}
1083
3a167bea
AK		 1084static int kvm_arch_vcpu_ioctl_set_sregs_hv(struct kvm_vcpu *vcpu,
1085 struct kvm_sregs *sregs)
de56a948
PM		 1086{
1087 int i, j;
1088
9333e6c4
PM		 1089 /* Only accept the same PVR as the host's, since we can't spoof it */
1090 if (sregs->pvr != vcpu->arch.pvr)
1091 return -EINVAL;
de56a948
PM		 1092
1093 j = 0;
1094 for (i = 0; i < vcpu->arch.slb_nr; i++) {
1095 if (sregs->u.s.ppc64.slb[i].slbe & SLB_ESID_V) {
1096 vcpu->arch.slb[j].orige = sregs->u.s.ppc64.slb[i].slbe;
1097 vcpu->arch.slb[j].origv = sregs->u.s.ppc64.slb[i].slbv;
1098 ++j;
1099 }
1100 }
1101 vcpu->arch.slb_max = j;
1102
1103 return 0;
1104}
1105
a0840240
AK		 1106static void kvmppc_set_lpcr(struct kvm_vcpu *vcpu, u64 new_lpcr,
1107 bool preserve_top32)
a0144e2a 1108{
8f902b00 1109 struct kvm *kvm = vcpu->kvm;
a0144e2a
PM		 1110 struct kvmppc_vcore *vc = vcpu->arch.vcore;
1111 u64 mask;
1112
8f902b00 1113 mutex_lock(&kvm->lock);
a0144e2a 1114 spin_lock(&vc->lock);
d682916a
AB		 1115 /*
1116 * If ILE (interrupt little-endian) has changed, update the
1117 * MSR_LE bit in the intr_msr for each vcpu in this vcore.
1118 */
1119 if ((new_lpcr & LPCR_ILE) != (vc->lpcr & LPCR_ILE)) {
d682916a
AB		 1120 struct kvm_vcpu *vcpu;
1121 int i;
1122
d682916a
AB		 1123 kvm_for_each_vcpu(i, vcpu, kvm) {
1124 if (vcpu->arch.vcore != vc)
1125 continue;
1126 if (new_lpcr & LPCR_ILE)
1127 vcpu->arch.intr_msr |= MSR_LE;
1128 else
1129 vcpu->arch.intr_msr &= ~MSR_LE;
1130 }
d682916a
AB		 1131 }
1132
a0144e2a
PM		 1133 /*
1134 * Userspace can only modify DPFD (default prefetch depth),
1135 * ILE (interrupt little-endian) and TC (translation control).
8cf4ecc0 1136 * On POWER8 and POWER9 userspace can also modify AIL (alt. interrupt loc.).
a0144e2a
PM		 1137 */
1138 mask = LPCR_DPFD | LPCR_ILE | LPCR_TC;
e0622bd9
PM		 1139 if (cpu_has_feature(CPU_FTR_ARCH_207S))
1140 mask |= LPCR_AIL;
a0840240
AK		 1141
1142 /* Broken 32-bit version of LPCR must not clear top bits */
1143 if (preserve_top32)
1144 mask &= 0xFFFFFFFF;
a0144e2a
PM		 1145 vc->lpcr = (vc->lpcr & ~mask) | (new_lpcr & mask);
1146 spin_unlock(&vc->lock);
8f902b00 1147 mutex_unlock(&kvm->lock);
a0144e2a
PM		 1148}
1149
3a167bea
AK		 1150static int kvmppc_get_one_reg_hv(struct kvm_vcpu *vcpu, u64 id,
1151 union kvmppc_one_reg *val)
31f3438e 1152{
a136a8bd
PM		 1153 int r = 0;
1154 long int i;
31f3438e 1155
a136a8bd 1156 switch (id) {
a59c1d9e
MS		 1157 case KVM_REG_PPC_DEBUG_INST:
1158 *val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT);
1159 break;
31f3438e 1160 case KVM_REG_PPC_HIOR:
a136a8bd
PM		 1161 *val = get_reg_val(id, 0);
1162 break;
1163 case KVM_REG_PPC_DABR:
1164 *val = get_reg_val(id, vcpu->arch.dabr);
1165 break;
8563bf52
PM		 1166 case KVM_REG_PPC_DABRX:
1167 *val = get_reg_val(id, vcpu->arch.dabrx);
1168 break;
a136a8bd
PM		 1169 case KVM_REG_PPC_DSCR:
1170 *val = get_reg_val(id, vcpu->arch.dscr);
1171 break;
1172 case KVM_REG_PPC_PURR:
1173 *val = get_reg_val(id, vcpu->arch.purr);
1174 break;
1175 case KVM_REG_PPC_SPURR:
1176 *val = get_reg_val(id, vcpu->arch.spurr);
1177 break;
1178 case KVM_REG_PPC_AMR:
1179 *val = get_reg_val(id, vcpu->arch.amr);
1180 break;
1181 case KVM_REG_PPC_UAMOR:
1182 *val = get_reg_val(id, vcpu->arch.uamor);
1183 break;
b005255e 1184 case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRS:
a136a8bd
PM		 1185 i = id - KVM_REG_PPC_MMCR0;
1186 *val = get_reg_val(id, vcpu->arch.mmcr[i]);
1187 break;
1188 case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8:
1189 i = id - KVM_REG_PPC_PMC1;
1190 *val = get_reg_val(id, vcpu->arch.pmc[i]);
31f3438e 1191 break;
b005255e
MN		 1192 case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2:
1193 i = id - KVM_REG_PPC_SPMC1;
1194 *val = get_reg_val(id, vcpu->arch.spmc[i]);
1195 break;
14941789
PM		 1196 case KVM_REG_PPC_SIAR:
1197 *val = get_reg_val(id, vcpu->arch.siar);
1198 break;
1199 case KVM_REG_PPC_SDAR:
1200 *val = get_reg_val(id, vcpu->arch.sdar);
1201 break;
b005255e
MN		 1202 case KVM_REG_PPC_SIER:
1203 *val = get_reg_val(id, vcpu->arch.sier);
a8bd19ef 1204 break;
b005255e
MN		 1205 case KVM_REG_PPC_IAMR:
1206 *val = get_reg_val(id, vcpu->arch.iamr);
1207 break;
b005255e
MN		 1208 case KVM_REG_PPC_PSPB:
1209 *val = get_reg_val(id, vcpu->arch.pspb);
1210 break;
b005255e
MN		 1211 case KVM_REG_PPC_DPDES:
1212 *val = get_reg_val(id, vcpu->arch.vcore->dpdes);
1213 break;
88b02cf9
PM		 1214 case KVM_REG_PPC_VTB:
1215 *val = get_reg_val(id, vcpu->arch.vcore->vtb);
1216 break;
b005255e
MN		 1217 case KVM_REG_PPC_DAWR:
1218 *val = get_reg_val(id, vcpu->arch.dawr);
1219 break;
1220 case KVM_REG_PPC_DAWRX:
1221 *val = get_reg_val(id, vcpu->arch.dawrx);
1222 break;
1223 case KVM_REG_PPC_CIABR:
1224 *val = get_reg_val(id, vcpu->arch.ciabr);
1225 break;
b005255e
MN		 1226 case KVM_REG_PPC_CSIGR:
1227 *val = get_reg_val(id, vcpu->arch.csigr);
1228 break;
1229 case KVM_REG_PPC_TACR:
1230 *val = get_reg_val(id, vcpu->arch.tacr);
1231 break;
1232 case KVM_REG_PPC_TCSCR:
1233 *val = get_reg_val(id, vcpu->arch.tcscr);
1234 break;
1235 case KVM_REG_PPC_PID:
1236 *val = get_reg_val(id, vcpu->arch.pid);
1237 break;
1238 case KVM_REG_PPC_ACOP:
1239 *val = get_reg_val(id, vcpu->arch.acop);
1240 break;
1241 case KVM_REG_PPC_WORT:
1242 *val = get_reg_val(id, vcpu->arch.wort);
a8bd19ef 1243 break;
e9cf1e08
PM		 1244 case KVM_REG_PPC_TIDR:
1245 *val = get_reg_val(id, vcpu->arch.tid);
1246 break;
1247 case KVM_REG_PPC_PSSCR:
1248 *val = get_reg_val(id, vcpu->arch.psscr);
1249 break;
55b665b0
PM		 1250 case KVM_REG_PPC_VPA_ADDR:
1251 spin_lock(&vcpu->arch.vpa_update_lock);
1252 *val = get_reg_val(id, vcpu->arch.vpa.next_gpa);
1253 spin_unlock(&vcpu->arch.vpa_update_lock);
1254 break;
1255 case KVM_REG_PPC_VPA_SLB:
1256 spin_lock(&vcpu->arch.vpa_update_lock);
1257 val->vpaval.addr = vcpu->arch.slb_shadow.next_gpa;
1258 val->vpaval.length = vcpu->arch.slb_shadow.len;
1259 spin_unlock(&vcpu->arch.vpa_update_lock);
1260 break;
1261 case KVM_REG_PPC_VPA_DTL:
1262 spin_lock(&vcpu->arch.vpa_update_lock);
1263 val->vpaval.addr = vcpu->arch.dtl.next_gpa;
1264 val->vpaval.length = vcpu->arch.dtl.len;
1265 spin_unlock(&vcpu->arch.vpa_update_lock);
1266 break;
93b0f4dc
PM		 1267 case KVM_REG_PPC_TB_OFFSET:
1268 *val = get_reg_val(id, vcpu->arch.vcore->tb_offset);
1269 break;
a0144e2a 1270 case KVM_REG_PPC_LPCR:
a0840240 1271 case KVM_REG_PPC_LPCR_64:
a0144e2a
PM		 1272 *val = get_reg_val(id, vcpu->arch.vcore->lpcr);
1273 break;
4b8473c9
PM		 1274 case KVM_REG_PPC_PPR:
1275 *val = get_reg_val(id, vcpu->arch.ppr);
1276 break;
a7d80d01
MN		 1277#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1278 case KVM_REG_PPC_TFHAR:
1279 *val = get_reg_val(id, vcpu->arch.tfhar);
1280 break;
1281 case KVM_REG_PPC_TFIAR:
1282 *val = get_reg_val(id, vcpu->arch.tfiar);
1283 break;
1284 case KVM_REG_PPC_TEXASR:
1285 *val = get_reg_val(id, vcpu->arch.texasr);
1286 break;
1287 case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31:
1288 i = id - KVM_REG_PPC_TM_GPR0;
1289 *val = get_reg_val(id, vcpu->arch.gpr_tm[i]);
1290 break;
1291 case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63:
1292 {
1293 int j;
1294 i = id - KVM_REG_PPC_TM_VSR0;
1295 if (i < 32)
1296 for (j = 0; j < TS_FPRWIDTH; j++)
1297 val->vsxval[j] = vcpu->arch.fp_tm.fpr[i][j];
1298 else {
1299 if (cpu_has_feature(CPU_FTR_ALTIVEC))
1300 val->vval = vcpu->arch.vr_tm.vr[i-32];
1301 else
1302 r = -ENXIO;
1303 }
1304 break;
1305 }
1306 case KVM_REG_PPC_TM_CR:
1307 *val = get_reg_val(id, vcpu->arch.cr_tm);
1308 break;
0d808df0
PM		 1309 case KVM_REG_PPC_TM_XER:
1310 *val = get_reg_val(id, vcpu->arch.xer_tm);
1311 break;
a7d80d01
MN		 1312 case KVM_REG_PPC_TM_LR:
1313 *val = get_reg_val(id, vcpu->arch.lr_tm);
1314 break;
1315 case KVM_REG_PPC_TM_CTR:
1316 *val = get_reg_val(id, vcpu->arch.ctr_tm);
1317 break;
1318 case KVM_REG_PPC_TM_FPSCR:
1319 *val = get_reg_val(id, vcpu->arch.fp_tm.fpscr);
1320 break;
1321 case KVM_REG_PPC_TM_AMR:
1322 *val = get_reg_val(id, vcpu->arch.amr_tm);
1323 break;
1324 case KVM_REG_PPC_TM_PPR:
1325 *val = get_reg_val(id, vcpu->arch.ppr_tm);
1326 break;
1327 case KVM_REG_PPC_TM_VRSAVE:
1328 *val = get_reg_val(id, vcpu->arch.vrsave_tm);
1329 break;
1330 case KVM_REG_PPC_TM_VSCR:
1331 if (cpu_has_feature(CPU_FTR_ALTIVEC))
1332 *val = get_reg_val(id, vcpu->arch.vr_tm.vscr.u[3]);
1333 else
1334 r = -ENXIO;
1335 break;
1336 case KVM_REG_PPC_TM_DSCR:
1337 *val = get_reg_val(id, vcpu->arch.dscr_tm);
1338 break;
1339 case KVM_REG_PPC_TM_TAR:
1340 *val = get_reg_val(id, vcpu->arch.tar_tm);
1341 break;
1342#endif
388cc6e1
PM		 1343 case KVM_REG_PPC_ARCH_COMPAT:
1344 *val = get_reg_val(id, vcpu->arch.vcore->arch_compat);
1345 break;
31f3438e 1346 default:
a136a8bd 1347 r = -EINVAL;
31f3438e
PM		 1348 break;
1349 }
1350
1351 return r;
1352}
1353
3a167bea
AK		 1354static int kvmppc_set_one_reg_hv(struct kvm_vcpu *vcpu, u64 id,
1355 union kvmppc_one_reg *val)
31f3438e 1356{
a136a8bd
PM		 1357 int r = 0;
1358 long int i;
55b665b0 1359 unsigned long addr, len;
31f3438e 1360
a136a8bd 1361 switch (id) {
31f3438e 1362 case KVM_REG_PPC_HIOR:
31f3438e 1363 /* Only allow this to be set to zero */
a136a8bd 1364 if (set_reg_val(id, *val))
31f3438e
PM		 1365 r = -EINVAL;
1366 break;
a136a8bd
PM		 1367 case KVM_REG_PPC_DABR:
1368 vcpu->arch.dabr = set_reg_val(id, *val);
1369 break;
8563bf52
PM		 1370 case KVM_REG_PPC_DABRX:
1371 vcpu->arch.dabrx = set_reg_val(id, *val) & ~DABRX_HYP;
1372 break;
a136a8bd
PM		 1373 case KVM_REG_PPC_DSCR:
1374 vcpu->arch.dscr = set_reg_val(id, *val);
1375 break;
1376 case KVM_REG_PPC_PURR:
1377 vcpu->arch.purr = set_reg_val(id, *val);
1378 break;
1379 case KVM_REG_PPC_SPURR:
1380 vcpu->arch.spurr = set_reg_val(id, *val);
1381 break;
1382 case KVM_REG_PPC_AMR:
1383 vcpu->arch.amr = set_reg_val(id, *val);
1384 break;
1385 case KVM_REG_PPC_UAMOR:
1386 vcpu->arch.uamor = set_reg_val(id, *val);
1387 break;
b005255e 1388 case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRS:
a136a8bd
PM		 1389 i = id - KVM_REG_PPC_MMCR0;
1390 vcpu->arch.mmcr[i] = set_reg_val(id, *val);
1391 break;
1392 case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8:
1393 i = id - KVM_REG_PPC_PMC1;
1394 vcpu->arch.pmc[i] = set_reg_val(id, *val);
1395 break;
b005255e
MN		 1396 case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2:
1397 i = id - KVM_REG_PPC_SPMC1;
1398 vcpu->arch.spmc[i] = set_reg_val(id, *val);
1399 break;
14941789
PM		 1400 case KVM_REG_PPC_SIAR:
1401 vcpu->arch.siar = set_reg_val(id, *val);
1402 break;
1403 case KVM_REG_PPC_SDAR:
1404 vcpu->arch.sdar = set_reg_val(id, *val);
1405 break;
b005255e
MN		 1406 case KVM_REG_PPC_SIER:
1407 vcpu->arch.sier = set_reg_val(id, *val);
a8bd19ef 1408 break;
b005255e
MN		 1409 case KVM_REG_PPC_IAMR:
1410 vcpu->arch.iamr = set_reg_val(id, *val);
1411 break;
b005255e
MN		 1412 case KVM_REG_PPC_PSPB:
1413 vcpu->arch.pspb = set_reg_val(id, *val);
1414 break;
b005255e
MN		 1415 case KVM_REG_PPC_DPDES:
1416 vcpu->arch.vcore->dpdes = set_reg_val(id, *val);
1417 break;
88b02cf9
PM		 1418 case KVM_REG_PPC_VTB:
1419 vcpu->arch.vcore->vtb = set_reg_val(id, *val);
1420 break;
b005255e
MN		 1421 case KVM_REG_PPC_DAWR:
1422 vcpu->arch.dawr = set_reg_val(id, *val);
1423 break;
1424 case KVM_REG_PPC_DAWRX:
1425 vcpu->arch.dawrx = set_reg_val(id, *val) & ~DAWRX_HYP;
1426 break;
1427 case KVM_REG_PPC_CIABR:
1428 vcpu->arch.ciabr = set_reg_val(id, *val);
1429 /* Don't allow setting breakpoints in hypervisor code */
1430 if ((vcpu->arch.ciabr & CIABR_PRIV) == CIABR_PRIV_HYPER)
1431 vcpu->arch.ciabr &= ~CIABR_PRIV; /* disable */
1432 break;
b005255e
MN		 1433 case KVM_REG_PPC_CSIGR:
1434 vcpu->arch.csigr = set_reg_val(id, *val);
1435 break;
1436 case KVM_REG_PPC_TACR:
1437 vcpu->arch.tacr = set_reg_val(id, *val);
1438 break;
1439 case KVM_REG_PPC_TCSCR:
1440 vcpu->arch.tcscr = set_reg_val(id, *val);
1441 break;
1442 case KVM_REG_PPC_PID:
1443 vcpu->arch.pid = set_reg_val(id, *val);
1444 break;
1445 case KVM_REG_PPC_ACOP:
1446 vcpu->arch.acop = set_reg_val(id, *val);
1447 break;
1448 case KVM_REG_PPC_WORT:
1449 vcpu->arch.wort = set_reg_val(id, *val);
a8bd19ef 1450 break;
e9cf1e08
PM		 1451 case KVM_REG_PPC_TIDR:
1452 vcpu->arch.tid = set_reg_val(id, *val);
1453 break;
1454 case KVM_REG_PPC_PSSCR:
1455 vcpu->arch.psscr = set_reg_val(id, *val) & PSSCR_GUEST_VIS;
1456 break;
55b665b0
PM		 1457 case KVM_REG_PPC_VPA_ADDR:
1458 addr = set_reg_val(id, *val);
1459 r = -EINVAL;
1460 if (!addr && (vcpu->arch.slb_shadow.next_gpa ||
1461 vcpu->arch.dtl.next_gpa))
1462 break;
1463 r = set_vpa(vcpu, &vcpu->arch.vpa, addr, sizeof(struct lppaca));
1464 break;
1465 case KVM_REG_PPC_VPA_SLB:
1466 addr = val->vpaval.addr;
1467 len = val->vpaval.length;
1468 r = -EINVAL;
1469 if (addr && !vcpu->arch.vpa.next_gpa)
1470 break;
1471 r = set_vpa(vcpu, &vcpu->arch.slb_shadow, addr, len);
1472 break;
1473 case KVM_REG_PPC_VPA_DTL:
1474 addr = val->vpaval.addr;
1475 len = val->vpaval.length;
1476 r = -EINVAL;
9f8c8c78
PM		 1477 if (addr && (len < sizeof(struct dtl_entry) ||
1478 !vcpu->arch.vpa.next_gpa))
55b665b0
PM		 1479 break;
1480 len -= len % sizeof(struct dtl_entry);
1481 r = set_vpa(vcpu, &vcpu->arch.dtl, addr, len);
1482 break;
93b0f4dc
PM		 1483 case KVM_REG_PPC_TB_OFFSET:
1484 /* round up to multiple of 2^24 */
1485 vcpu->arch.vcore->tb_offset =
1486 ALIGN(set_reg_val(id, *val), 1UL << 24);
1487 break;
a0144e2a 1488 case KVM_REG_PPC_LPCR:
a0840240
AK		 1489 kvmppc_set_lpcr(vcpu, set_reg_val(id, *val), true);
1490 break;
1491 case KVM_REG_PPC_LPCR_64:
1492 kvmppc_set_lpcr(vcpu, set_reg_val(id, *val), false);
a0144e2a 1493 break;
4b8473c9
PM		 1494 case KVM_REG_PPC_PPR:
1495 vcpu->arch.ppr = set_reg_val(id, *val);
1496 break;
a7d80d01
MN		 1497#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1498 case KVM_REG_PPC_TFHAR:
1499 vcpu->arch.tfhar = set_reg_val(id, *val);
1500 break;
1501 case KVM_REG_PPC_TFIAR:
1502 vcpu->arch.tfiar = set_reg_val(id, *val);
1503 break;
1504 case KVM_REG_PPC_TEXASR:
1505 vcpu->arch.texasr = set_reg_val(id, *val);
1506 break;
1507 case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31:
1508 i = id - KVM_REG_PPC_TM_GPR0;
1509 vcpu->arch.gpr_tm[i] = set_reg_val(id, *val);
1510 break;
1511 case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63:
1512 {
1513 int j;
1514 i = id - KVM_REG_PPC_TM_VSR0;
1515 if (i < 32)
1516 for (j = 0; j < TS_FPRWIDTH; j++)
1517 vcpu->arch.fp_tm.fpr[i][j] = val->vsxval[j];
1518 else
1519 if (cpu_has_feature(CPU_FTR_ALTIVEC))
1520 vcpu->arch.vr_tm.vr[i-32] = val->vval;
1521 else
1522 r = -ENXIO;
1523 break;
1524 }
1525 case KVM_REG_PPC_TM_CR:
1526 vcpu->arch.cr_tm = set_reg_val(id, *val);
1527 break;
0d808df0
PM		 1528 case KVM_REG_PPC_TM_XER:
1529 vcpu->arch.xer_tm = set_reg_val(id, *val);
1530 break;
a7d80d01
MN		 1531 case KVM_REG_PPC_TM_LR:
1532 vcpu->arch.lr_tm = set_reg_val(id, *val);
1533 break;
1534 case KVM_REG_PPC_TM_CTR:
1535 vcpu->arch.ctr_tm = set_reg_val(id, *val);
1536 break;
1537 case KVM_REG_PPC_TM_FPSCR:
1538 vcpu->arch.fp_tm.fpscr = set_reg_val(id, *val);
1539 break;
1540 case KVM_REG_PPC_TM_AMR:
1541 vcpu->arch.amr_tm = set_reg_val(id, *val);
1542 break;
1543 case KVM_REG_PPC_TM_PPR:
1544 vcpu->arch.ppr_tm = set_reg_val(id, *val);
1545 break;
1546 case KVM_REG_PPC_TM_VRSAVE:
1547 vcpu->arch.vrsave_tm = set_reg_val(id, *val);
1548 break;
1549 case KVM_REG_PPC_TM_VSCR:
1550 if (cpu_has_feature(CPU_FTR_ALTIVEC))
1551 vcpu->arch.vr.vscr.u[3] = set_reg_val(id, *val);
1552 else
1553 r = - ENXIO;
1554 break;
1555 case KVM_REG_PPC_TM_DSCR:
1556 vcpu->arch.dscr_tm = set_reg_val(id, *val);
1557 break;
1558 case KVM_REG_PPC_TM_TAR:
1559 vcpu->arch.tar_tm = set_reg_val(id, *val);
1560 break;
1561#endif
388cc6e1
PM		 1562 case KVM_REG_PPC_ARCH_COMPAT:
1563 r = kvmppc_set_arch_compat(vcpu, set_reg_val(id, *val));
1564 break;
31f3438e 1565 default:
a136a8bd 1566 r = -EINVAL;
31f3438e
PM		 1567 break;
1568 }
1569
1570 return r;
1571}
1572
45c940ba
PM		 1573/*
1574 * On POWER9, threads are independent and can be in different partitions.
1575 * Therefore we consider each thread to be a subcore.
1576 * There is a restriction that all threads have to be in the same
1577 * MMU mode (radix or HPT), unfortunately, but since we only support
1578 * HPT guests on a HPT host so far, that isn't an impediment yet.
1579 */
1580static int threads_per_vcore(void)
1581{
1582 if (cpu_has_feature(CPU_FTR_ARCH_300))
1583 return 1;
1584 return threads_per_subcore;
1585}
1586
de9bdd1a
SS		 1587static struct kvmppc_vcore *kvmppc_vcore_create(struct kvm *kvm, int core)
1588{
1589 struct kvmppc_vcore *vcore;
1590
1591 vcore = kzalloc(sizeof(struct kvmppc_vcore), GFP_KERNEL);
1592
1593 if (vcore == NULL)
1594 return NULL;
1595
de9bdd1a 1596 spin_lock_init(&vcore->lock);
2711e248 1597 spin_lock_init(&vcore->stoltb_lock);
8577370f 1598 init_swait_queue_head(&vcore->wq);
de9bdd1a
SS		 1599 vcore->preempt_tb = TB_NIL;
1600 vcore->lpcr = kvm->arch.lpcr;
45c940ba 1601 vcore->first_vcpuid = core * threads_per_vcore();
de9bdd1a 1602 vcore->kvm = kvm;
ec257165 1603 INIT_LIST_HEAD(&vcore->preempt_list);
de9bdd1a
SS		 1604
1605 return vcore;
1606}
1607
b6c295df
PM		 1608#ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING
1609static struct debugfs_timings_element {
1610 const char *name;
1611 size_t offset;
1612} timings[] = {
1613 {"rm_entry", offsetof(struct kvm_vcpu, arch.rm_entry)},
1614 {"rm_intr", offsetof(struct kvm_vcpu, arch.rm_intr)},
1615 {"rm_exit", offsetof(struct kvm_vcpu, arch.rm_exit)},
1616 {"guest", offsetof(struct kvm_vcpu, arch.guest_time)},
1617 {"cede", offsetof(struct kvm_vcpu, arch.cede_time)},
1618};
1619
1620#define N_TIMINGS (sizeof(timings) / sizeof(timings[0]))
1621
1622struct debugfs_timings_state {
1623 struct kvm_vcpu *vcpu;
1624 unsigned int buflen;
1625 char buf[N_TIMINGS * 100];
1626};
1627
1628static int debugfs_timings_open(struct inode *inode, struct file *file)
1629{
1630 struct kvm_vcpu *vcpu = inode->i_private;
1631 struct debugfs_timings_state *p;
1632
1633 p = kzalloc(sizeof(*p), GFP_KERNEL);
1634 if (!p)
1635 return -ENOMEM;
1636
1637 kvm_get_kvm(vcpu->kvm);
1638 p->vcpu = vcpu;
1639 file->private_data = p;
1640
1641 return nonseekable_open(inode, file);
1642}
1643
1644static int debugfs_timings_release(struct inode *inode, struct file *file)
1645{
1646 struct debugfs_timings_state *p = file->private_data;
1647
1648 kvm_put_kvm(p->vcpu->kvm);
1649 kfree(p);
1650 return 0;
1651}
1652
1653static ssize_t debugfs_timings_read(struct file *file, char __user *buf,
1654 size_t len, loff_t *ppos)
1655{
1656 struct debugfs_timings_state *p = file->private_data;
1657 struct kvm_vcpu *vcpu = p->vcpu;
1658 char *s, *buf_end;
1659 struct kvmhv_tb_accumulator tb;
1660 u64 count;
1661 loff_t pos;
1662 ssize_t n;
1663 int i, loops;
1664 bool ok;
1665
1666 if (!p->buflen) {
1667 s = p->buf;
1668 buf_end = s + sizeof(p->buf);
1669 for (i = 0; i < N_TIMINGS; ++i) {
1670 struct kvmhv_tb_accumulator *acc;
1671
1672 acc = (struct kvmhv_tb_accumulator *)
1673 ((unsigned long)vcpu + timings[i].offset);
1674 ok = false;
1675 for (loops = 0; loops < 1000; ++loops) {
1676 count = acc->seqcount;
1677 if (!(count & 1)) {
1678 smp_rmb();
1679 tb = *acc;
1680 smp_rmb();
1681 if (count == acc->seqcount) {
1682 ok = true;
1683 break;
1684 }
1685 }
1686 udelay(1);
1687 }
1688 if (!ok)
1689 snprintf(s, buf_end - s, "%s: stuck\n",
1690 timings[i].name);
1691 else
1692 snprintf(s, buf_end - s,
1693 "%s: %llu %llu %llu %llu\n",
1694 timings[i].name, count / 2,
1695 tb_to_ns(tb.tb_total),
1696 tb_to_ns(tb.tb_min),
1697 tb_to_ns(tb.tb_max));
1698 s += strlen(s);
1699 }
1700 p->buflen = s - p->buf;
1701 }
1702
1703 pos = *ppos;
1704 if (pos >= p->buflen)
1705 return 0;
1706 if (len > p->buflen - pos)
1707 len = p->buflen - pos;
1708 n = copy_to_user(buf, p->buf + pos, len);
1709 if (n) {
1710 if (n == len)
1711 return -EFAULT;
1712 len -= n;
1713 }
1714 *ppos = pos + len;
1715 return len;
1716}
1717
1718static ssize_t debugfs_timings_write(struct file *file, const char __user *buf,
1719 size_t len, loff_t *ppos)
1720{
1721 return -EACCES;
1722}
1723
1724static const struct file_operations debugfs_timings_ops = {
1725 .owner = THIS_MODULE,
1726 .open = debugfs_timings_open,
1727 .release = debugfs_timings_release,
1728 .read = debugfs_timings_read,
1729 .write = debugfs_timings_write,
1730 .llseek = generic_file_llseek,
1731};
1732
1733/* Create a debugfs directory for the vcpu */
1734static void debugfs_vcpu_init(struct kvm_vcpu *vcpu, unsigned int id)
1735{
1736 char buf[16];
1737 struct kvm *kvm = vcpu->kvm;
1738
1739 snprintf(buf, sizeof(buf), "vcpu%u", id);
1740 if (IS_ERR_OR_NULL(kvm->arch.debugfs_dir))
1741 return;
1742 vcpu->arch.debugfs_dir = debugfs_create_dir(buf, kvm->arch.debugfs_dir);
1743 if (IS_ERR_OR_NULL(vcpu->arch.debugfs_dir))
1744 return;
1745 vcpu->arch.debugfs_timings =
1746 debugfs_create_file("timings", 0444, vcpu->arch.debugfs_dir,
1747 vcpu, &debugfs_timings_ops);
1748}
1749
1750#else /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */
1751static void debugfs_vcpu_init(struct kvm_vcpu *vcpu, unsigned int id)
1752{
1753}
1754#endif /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */
1755
3a167bea
AK		 1756static struct kvm_vcpu *kvmppc_core_vcpu_create_hv(struct kvm *kvm,
1757 unsigned int id)
de56a948
PM		 1758{
1759 struct kvm_vcpu *vcpu;
371fefd6
PM		 1760 int err = -EINVAL;
1761 int core;
1762 struct kvmppc_vcore *vcore;
de56a948 1763
45c940ba 1764 core = id / threads_per_vcore();
371fefd6
PM		 1765 if (core >= KVM_MAX_VCORES)
1766 goto out;
1767
1768 err = -ENOMEM;
6b75e6bf 1769 vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
de56a948
PM		 1770 if (!vcpu)
1771 goto out;
1772
1773 err = kvm_vcpu_init(vcpu, kvm, id);
1774 if (err)
1775 goto free_vcpu;
1776
1777 vcpu->arch.shared = &vcpu->arch.shregs;
5deb8e7a
AG		 1778#ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE
1779 /*
1780 * The shared struct is never shared on HV,
1781 * so we can always use host endianness
1782 */
1783#ifdef __BIG_ENDIAN__
1784 vcpu->arch.shared_big_endian = true;
1785#else
1786 vcpu->arch.shared_big_endian = false;
1787#endif
1788#endif
de56a948
PM		 1789 vcpu->arch.mmcr[0] = MMCR0_FC;
1790 vcpu->arch.ctrl = CTRL_RUNLATCH;
1791 /* default to host PVR, since we can't spoof it */
3a167bea 1792 kvmppc_set_pvr_hv(vcpu, mfspr(SPRN_PVR));
2e25aa5f 1793 spin_lock_init(&vcpu->arch.vpa_update_lock);
c7b67670
PM		 1794 spin_lock_init(&vcpu->arch.tbacct_lock);
1795 vcpu->arch.busy_preempt = TB_NIL;
d682916a 1796 vcpu->arch.intr_msr = MSR_SF | MSR_ME;
de56a948 1797
de56a948
PM		 1798 kvmppc_mmu_book3s_hv_init(vcpu);
1799
8455d79e 1800 vcpu->arch.state = KVMPPC_VCPU_NOTREADY;
371fefd6
PM		 1801
1802 init_waitqueue_head(&vcpu->arch.cpu_run);
1803
1804 mutex_lock(&kvm->lock);
1805 vcore = kvm->arch.vcores[core];
1806 if (!vcore) {
de9bdd1a 1807 vcore = kvmppc_vcore_create(kvm, core);
371fefd6 1808 kvm->arch.vcores[core] = vcore;
1b400ba0 1809 kvm->arch.online_vcores++;
371fefd6
PM		 1810 }
1811 mutex_unlock(&kvm->lock);
1812
1813 if (!vcore)
1814 goto free_vcpu;
1815
1816 spin_lock(&vcore->lock);
1817 ++vcore->num_threads;
371fefd6
PM		 1818 spin_unlock(&vcore->lock);
1819 vcpu->arch.vcore = vcore;
e0b7ec05 1820 vcpu->arch.ptid = vcpu->vcpu_id - vcore->first_vcpuid;
ec257165 1821 vcpu->arch.thread_cpu = -1;
a29ebeaf 1822 vcpu->arch.prev_cpu = -1;
371fefd6 1823
af8f38b3
AG		 1824 vcpu->arch.cpu_type = KVM_CPU_3S_64;
1825 kvmppc_sanity_check(vcpu);
1826
b6c295df
PM		 1827 debugfs_vcpu_init(vcpu, id);
1828
de56a948
PM		 1829 return vcpu;
1830
1831free_vcpu:
6b75e6bf 1832 kmem_cache_free(kvm_vcpu_cache, vcpu);
de56a948
PM		 1833out:
1834 return ERR_PTR(err);
1835}
1836
c35635ef
PM		 1837static void unpin_vpa(struct kvm *kvm, struct kvmppc_vpa *vpa)
1838{
1839 if (vpa->pinned_addr)
1840 kvmppc_unpin_guest_page(kvm, vpa->pinned_addr, vpa->gpa,
1841 vpa->dirty);
1842}
1843
3a167bea 1844static void kvmppc_core_vcpu_free_hv(struct kvm_vcpu *vcpu)
de56a948 1845{
2e25aa5f 1846 spin_lock(&vcpu->arch.vpa_update_lock);
c35635ef
PM		 1847 unpin_vpa(vcpu->kvm, &vcpu->arch.dtl);
1848 unpin_vpa(vcpu->kvm, &vcpu->arch.slb_shadow);
1849 unpin_vpa(vcpu->kvm, &vcpu->arch.vpa);
2e25aa5f 1850 spin_unlock(&vcpu->arch.vpa_update_lock);
de56a948 1851 kvm_vcpu_uninit(vcpu);
6b75e6bf 1852 kmem_cache_free(kvm_vcpu_cache, vcpu);
de56a948
PM		 1853}
1854
3a167bea
AK		 1855static int kvmppc_core_check_requests_hv(struct kvm_vcpu *vcpu)
1856{
1857 /* Indicate we want to get back into the guest */
1858 return 1;
1859}
1860
19ccb76a 1861static void kvmppc_set_timer(struct kvm_vcpu *vcpu)
371fefd6 1862{
19ccb76a 1863 unsigned long dec_nsec, now;
371fefd6 1864
19ccb76a
PM		 1865 now = get_tb();
1866 if (now > vcpu->arch.dec_expires) {
1867 /* decrementer has already gone negative */
1868 kvmppc_core_queue_dec(vcpu);
7e28e60e 1869 kvmppc_core_prepare_to_enter(vcpu);
19ccb76a 1870 return;
371fefd6 1871 }
19ccb76a
PM		 1872 dec_nsec = (vcpu->arch.dec_expires - now) * NSEC_PER_SEC
1873 / tb_ticks_per_sec;
8b0e1953 1874 hrtimer_start(&vcpu->arch.dec_timer, dec_nsec, HRTIMER_MODE_REL);
19ccb76a 1875 vcpu->arch.timer_running = 1;
371fefd6
PM		 1876}
1877
19ccb76a 1878static void kvmppc_end_cede(struct kvm_vcpu *vcpu)
371fefd6 1879{
19ccb76a
PM		 1880 vcpu->arch.ceded = 0;
1881 if (vcpu->arch.timer_running) {
1882 hrtimer_try_to_cancel(&vcpu->arch.dec_timer);
1883 vcpu->arch.timer_running = 0;
1884 }
371fefd6
PM		 1885}
1886
e0b7ec05 1887extern void __kvmppc_vcore_entry(void);
de56a948 1888
371fefd6
PM		 1889static void kvmppc_remove_runnable(struct kvmppc_vcore *vc,
1890 struct kvm_vcpu *vcpu)
de56a948 1891{
c7b67670
PM		 1892 u64 now;
1893
371fefd6
PM		 1894 if (vcpu->arch.state != KVMPPC_VCPU_RUNNABLE)
1895 return;
bf3d32e1 1896 spin_lock_irq(&vcpu->arch.tbacct_lock);
c7b67670
PM		 1897 now = mftb();
1898 vcpu->arch.busy_stolen += vcore_stolen_time(vc, now) -
1899 vcpu->arch.stolen_logged;
1900 vcpu->arch.busy_preempt = now;
1901 vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST;
bf3d32e1 1902 spin_unlock_irq(&vcpu->arch.tbacct_lock);
371fefd6 1903 --vc->n_runnable;
7b5f8272 1904 WRITE_ONCE(vc->runnable_threads[vcpu->arch.ptid], NULL);
371fefd6
PM		 1905}
1906
f0888f70
PM		 1907static int kvmppc_grab_hwthread(int cpu)
1908{
1909 struct paca_struct *tpaca;
b754c739 1910 long timeout = 10000;
f0888f70
PM		 1911
1912 tpaca = &paca[cpu];
1913
1914 /* Ensure the thread won't go into the kernel if it wakes */
7b444c67 1915 tpaca->kvm_hstate.kvm_vcpu = NULL;
b4deba5c 1916 tpaca->kvm_hstate.kvm_vcore = NULL;
5d5b99cd
PM		 1917 tpaca->kvm_hstate.napping = 0;
1918 smp_wmb();
1919 tpaca->kvm_hstate.hwthread_req = 1;
f0888f70
PM		 1920
1921 /*
1922 * If the thread is already executing in the kernel (e.g. handling
1923 * a stray interrupt), wait for it to get back to nap mode.
1924 * The smp_mb() is to ensure that our setting of hwthread_req
1925 * is visible before we look at hwthread_state, so if this
1926 * races with the code at system_reset_pSeries and the thread
1927 * misses our setting of hwthread_req, we are sure to see its
1928 * setting of hwthread_state, and vice versa.
1929 */
1930 smp_mb();
1931 while (tpaca->kvm_hstate.hwthread_state == KVM_HWTHREAD_IN_KERNEL) {
1932 if (--timeout <= 0) {
1933 pr_err("KVM: couldn't grab cpu %d\n", cpu);
1934 return -EBUSY;
1935 }
1936 udelay(1);
1937 }
1938 return 0;
1939}
1940
1941static void kvmppc_release_hwthread(int cpu)
1942{
1943 struct paca_struct *tpaca;
1944
1945 tpaca = &paca[cpu];
1946 tpaca->kvm_hstate.hwthread_req = 0;
1947 tpaca->kvm_hstate.kvm_vcpu = NULL;
b4deba5c
PM		 1948 tpaca->kvm_hstate.kvm_vcore = NULL;
1949 tpaca->kvm_hstate.kvm_split_mode = NULL;
f0888f70
PM		 1950}
1951
a29ebeaf
PM		 1952static void do_nothing(void *x)
1953{
1954}
1955
1956static void radix_flush_cpu(struct kvm *kvm, int cpu, struct kvm_vcpu *vcpu)
1957{
1958 int i;
1959
1960 cpu = cpu_first_thread_sibling(cpu);
1961 cpumask_set_cpu(cpu, &kvm->arch.need_tlb_flush);
1962 /*
1963 * Make sure setting of bit in need_tlb_flush precedes
1964 * testing of cpu_in_guest bits. The matching barrier on
1965 * the other side is the first smp_mb() in kvmppc_run_core().
1966 */
1967 smp_mb();
1968 for (i = 0; i < threads_per_core; ++i)
1969 if (cpumask_test_cpu(cpu + i, &kvm->arch.cpu_in_guest))
1970 smp_call_function_single(cpu + i, do_nothing, NULL, 1);
1971}
1972
b4deba5c 1973static void kvmppc_start_thread(struct kvm_vcpu *vcpu, struct kvmppc_vcore *vc)
371fefd6
PM		 1974{
1975 int cpu;
1976 struct paca_struct *tpaca;
ec257165 1977 struct kvmppc_vcore *mvc = vc->master_vcore;
a29ebeaf 1978 struct kvm *kvm = vc->kvm;
371fefd6 1979
b4deba5c
PM		 1980 cpu = vc->pcpu;
1981 if (vcpu) {
1982 if (vcpu->arch.timer_running) {
1983 hrtimer_try_to_cancel(&vcpu->arch.dec_timer);
1984 vcpu->arch.timer_running = 0;
1985 }
1986 cpu += vcpu->arch.ptid;
1987 vcpu->cpu = mvc->pcpu;
1988 vcpu->arch.thread_cpu = cpu;
a29ebeaf
PM		 1989
1990 /*
1991 * With radix, the guest can do TLB invalidations itself,
1992 * and it could choose to use the local form (tlbiel) if
1993 * it is invalidating a translation that has only ever been
1994 * used on one vcpu. However, that doesn't mean it has
1995 * only ever been used on one physical cpu, since vcpus
1996 * can move around between pcpus. To cope with this, when
1997 * a vcpu moves from one pcpu to another, we need to tell
1998 * any vcpus running on the same core as this vcpu previously
1999 * ran to flush the TLB. The TLB is shared between threads,
2000 * so we use a single bit in .need_tlb_flush for all 4 threads.
2001 */
2002 if (kvm_is_radix(kvm) && vcpu->arch.prev_cpu != cpu) {
2003 if (vcpu->arch.prev_cpu >= 0 &&
2004 cpu_first_thread_sibling(vcpu->arch.prev_cpu) !=
2005 cpu_first_thread_sibling(cpu))
2006 radix_flush_cpu(kvm, vcpu->arch.prev_cpu, vcpu);
2007 vcpu->arch.prev_cpu = cpu;
2008 }
2009 cpumask_set_cpu(cpu, &kvm->arch.cpu_in_guest);
19ccb76a 2010 }
371fefd6 2011 tpaca = &paca[cpu];
5d5b99cd 2012 tpaca->kvm_hstate.kvm_vcpu = vcpu;
ec257165 2013 tpaca->kvm_hstate.ptid = cpu - mvc->pcpu;
ec257165 2014 /* Order stores to hstate.kvm_vcpu etc. before store to kvm_vcore */
371fefd6 2015 smp_wmb();
b4deba5c 2016 tpaca->kvm_hstate.kvm_vcore = mvc;
5d5b99cd 2017 if (cpu != smp_processor_id())
66feed61 2018 kvmppc_ipi_thread(cpu);
371fefd6 2019}
de56a948 2020
5d5b99cd 2021static void kvmppc_wait_for_nap(void)
371fefd6 2022{
5d5b99cd
PM		 2023 int cpu = smp_processor_id();
2024 int i, loops;
45c940ba 2025 int n_threads = threads_per_vcore();
371fefd6 2026
45c940ba
PM		 2027 if (n_threads <= 1)
2028 return;
5d5b99cd
PM		 2029 for (loops = 0; loops < 1000000; ++loops) {
2030 /*
2031 * Check if all threads are finished.
b4deba5c 2032 * We set the vcore pointer when starting a thread
5d5b99cd 2033 * and the thread clears it when finished, so we look
b4deba5c 2034 * for any threads that still have a non-NULL vcore ptr.
5d5b99cd 2035 */
45c940ba 2036 for (i = 1; i < n_threads; ++i)
b4deba5c 2037 if (paca[cpu + i].kvm_hstate.kvm_vcore)
5d5b99cd 2038 break;
45c940ba 2039 if (i == n_threads) {
5d5b99cd
PM		 2040 HMT_medium();
2041 return;
371fefd6 2042 }
5d5b99cd 2043 HMT_low();
371fefd6
PM		 2044 }
2045 HMT_medium();
45c940ba 2046 for (i = 1; i < n_threads; ++i)
b4deba5c 2047 if (paca[cpu + i].kvm_hstate.kvm_vcore)
5d5b99cd 2048 pr_err("KVM: CPU %d seems to be stuck\n", cpu + i);
371fefd6
PM		 2049}
2050
2051/*
2052 * Check that we are on thread 0 and that any other threads in
7b444c67
PM		 2053 * this core are off-line. Then grab the threads so they can't
2054 * enter the kernel.
371fefd6
PM		 2055 */
2056static int on_primary_thread(void)
2057{
2058 int cpu = smp_processor_id();
3102f784 2059 int thr;
371fefd6 2060
3102f784
ME		 2061 /* Are we on a primary subcore? */
2062 if (cpu_thread_in_subcore(cpu))
371fefd6 2063 return 0;
3102f784
ME		 2064
2065 thr = 0;
2066 while (++thr < threads_per_subcore)
371fefd6
PM		 2067 if (cpu_online(cpu + thr))
2068 return 0;
7b444c67
PM		 2069
2070 /* Grab all hw threads so they can't go into the kernel */
3102f784 2071 for (thr = 1; thr < threads_per_subcore; ++thr) {
7b444c67
PM		 2072 if (kvmppc_grab_hwthread(cpu + thr)) {
2073 /* Couldn't grab one; let the others go */
2074 do {
2075 kvmppc_release_hwthread(cpu + thr);
2076 } while (--thr > 0);
2077 return 0;
2078 }
2079 }
371fefd6
PM		 2080 return 1;
2081}
2082
ec257165
PM		 2083/*
2084 * A list of virtual cores for each physical CPU.
2085 * These are vcores that could run but their runner VCPU tasks are
2086 * (or may be) preempted.
2087 */
2088struct preempted_vcore_list {
2089 struct list_head list;
2090 spinlock_t lock;
2091};
2092
2093static DEFINE_PER_CPU(struct preempted_vcore_list, preempted_vcores);
2094
2095static void init_vcore_lists(void)
2096{
2097 int cpu;
2098
2099 for_each_possible_cpu(cpu) {
2100 struct preempted_vcore_list *lp = &per_cpu(preempted_vcores, cpu);
2101 spin_lock_init(&lp->lock);
2102 INIT_LIST_HEAD(&lp->list);
2103 }
2104}
2105
2106static void kvmppc_vcore_preempt(struct kvmppc_vcore *vc)
2107{
2108 struct preempted_vcore_list *lp = this_cpu_ptr(&preempted_vcores);
2109
2110 vc->vcore_state = VCORE_PREEMPT;
2111 vc->pcpu = smp_processor_id();
45c940ba 2112 if (vc->num_threads < threads_per_vcore()) {
ec257165
PM		 2113 spin_lock(&lp->lock);
2114 list_add_tail(&vc->preempt_list, &lp->list);
2115 spin_unlock(&lp->lock);
2116 }
2117
2118 /* Start accumulating stolen time */
2119 kvmppc_core_start_stolen(vc);
2120}
2121
2122static void kvmppc_vcore_end_preempt(struct kvmppc_vcore *vc)
2123{
402813fe 2124 struct preempted_vcore_list *lp;
ec257165
PM		 2125
2126 kvmppc_core_end_stolen(vc);
2127 if (!list_empty(&vc->preempt_list)) {
402813fe 2128 lp = &per_cpu(preempted_vcores, vc->pcpu);
ec257165
PM		 2129 spin_lock(&lp->lock);
2130 list_del_init(&vc->preempt_list);
2131 spin_unlock(&lp->lock);
2132 }
2133 vc->vcore_state = VCORE_INACTIVE;
2134}
2135
b4deba5c
PM		 2136/*
2137 * This stores information about the virtual cores currently
2138 * assigned to a physical core.
2139 */
ec257165 2140struct core_info {
b4deba5c
PM		 2141 int n_subcores;
2142 int max_subcore_threads;
ec257165 2143 int total_threads;
b4deba5c
PM		 2144 int subcore_threads[MAX_SUBCORES];
2145 struct kvm *subcore_vm[MAX_SUBCORES];
2146 struct list_head vcs[MAX_SUBCORES];
ec257165
PM		 2147};
2148
b4deba5c
PM		 2149/*
2150 * This mapping means subcores 0 and 1 can use threads 0-3 and 4-7
2151 * respectively in 2-way micro-threading (split-core) mode.
2152 */
2153static int subcore_thread_map[MAX_SUBCORES] = { 0, 4, 2, 6 };
2154
ec257165
PM		 2155static void init_core_info(struct core_info *cip, struct kvmppc_vcore *vc)
2156{
b4deba5c
PM		 2157 int sub;
2158
ec257165 2159 memset(cip, 0, sizeof(*cip));
b4deba5c
PM		 2160 cip->n_subcores = 1;
2161 cip->max_subcore_threads = vc->num_threads;
ec257165 2162 cip->total_threads = vc->num_threads;
b4deba5c
PM		 2163 cip->subcore_threads[0] = vc->num_threads;
2164 cip->subcore_vm[0] = vc->kvm;
2165 for (sub = 0; sub < MAX_SUBCORES; ++sub)
2166 INIT_LIST_HEAD(&cip->vcs[sub]);
2167 list_add_tail(&vc->preempt_list, &cip->vcs[0]);
2168}
2169
2170static bool subcore_config_ok(int n_subcores, int n_threads)
2171{
2172 /* Can only dynamically split if unsplit to begin with */
2173 if (n_subcores > 1 && threads_per_subcore < MAX_SMT_THREADS)
2174 return false;
2175 if (n_subcores > MAX_SUBCORES)
2176 return false;
2177 if (n_subcores > 1) {
2178 if (!(dynamic_mt_modes & 2))
2179 n_subcores = 4;
2180 if (n_subcores > 2 && !(dynamic_mt_modes & 4))
2181 return false;
2182 }
2183
2184 return n_subcores * roundup_pow_of_two(n_threads) <= MAX_SMT_THREADS;
ec257165
PM		 2185}
2186
2187static void init_master_vcore(struct kvmppc_vcore *vc)
2188{
2189 vc->master_vcore = vc;
2190 vc->entry_exit_map = 0;
2191 vc->in_guest = 0;
2192 vc->napping_threads = 0;
2193 vc->conferring_threads = 0;
2194}
2195
b4deba5c
PM		 2196static bool can_dynamic_split(struct kvmppc_vcore *vc, struct core_info *cip)
2197{
2198 int n_threads = vc->num_threads;
2199 int sub;
2200
2201 if (!cpu_has_feature(CPU_FTR_ARCH_207S))
2202 return false;
2203
2204 if (n_threads < cip->max_subcore_threads)
2205 n_threads = cip->max_subcore_threads;
b009031f 2206 if (!subcore_config_ok(cip->n_subcores + 1, n_threads))
b4deba5c 2207 return false;
b009031f 2208 cip->max_subcore_threads = n_threads;
b4deba5c
PM		 2209
2210 sub = cip->n_subcores;
2211 ++cip->n_subcores;
2212 cip->total_threads += vc->num_threads;
2213 cip->subcore_threads[sub] = vc->num_threads;
2214 cip->subcore_vm[sub] = vc->kvm;
2215 init_master_vcore(vc);
28d057c8 2216 list_move_tail(&vc->preempt_list, &cip->vcs[sub]);
b4deba5c
PM		 2217
2218 return true;
2219}
2220
b4deba5c
PM		 2221/*
2222 * Work out whether it is possible to piggyback the execution of
2223 * vcore *pvc onto the execution of the other vcores described in *cip.
2224 */
2225static bool can_piggyback(struct kvmppc_vcore *pvc, struct core_info *cip,
2226 int target_threads)
2227{
b4deba5c
PM		 2228 if (cip->total_threads + pvc->num_threads > target_threads)
2229 return false;
b4deba5c 2230
b009031f 2231 return can_dynamic_split(pvc, cip);
b4deba5c
PM		 2232}
2233
d911f0be
PM		 2234static void prepare_threads(struct kvmppc_vcore *vc)
2235{
7b5f8272
SJS		 2236 int i;
2237 struct kvm_vcpu *vcpu;
d911f0be 2238
7b5f8272 2239 for_each_runnable_thread(i, vcpu, vc) {
d911f0be
PM		 2240 if (signal_pending(vcpu->arch.run_task))
2241 vcpu->arch.ret = -EINTR;
2242 else if (vcpu->arch.vpa.update_pending ||
2243 vcpu->arch.slb_shadow.update_pending ||
2244 vcpu->arch.dtl.update_pending)
2245 vcpu->arch.ret = RESUME_GUEST;
2246 else
2247 continue;
2248 kvmppc_remove_runnable(vc, vcpu);
2249 wake_up(&vcpu->arch.cpu_run);
2250 }
2251}
2252
ec257165
PM		 2253static void collect_piggybacks(struct core_info *cip, int target_threads)
2254{
2255 struct preempted_vcore_list *lp = this_cpu_ptr(&preempted_vcores);
2256 struct kvmppc_vcore *pvc, *vcnext;
2257
2258 spin_lock(&lp->lock);
2259 list_for_each_entry_safe(pvc, vcnext, &lp->list, preempt_list) {
2260 if (!spin_trylock(&pvc->lock))
2261 continue;
2262 prepare_threads(pvc);
2263 if (!pvc->n_runnable) {
2264 list_del_init(&pvc->preempt_list);
2265 if (pvc->runner == NULL) {
2266 pvc->vcore_state = VCORE_INACTIVE;
2267 kvmppc_core_end_stolen(pvc);
2268 }
2269 spin_unlock(&pvc->lock);
2270 continue;
2271 }
2272 if (!can_piggyback(pvc, cip, target_threads)) {
2273 spin_unlock(&pvc->lock);
2274 continue;
2275 }
2276 kvmppc_core_end_stolen(pvc);
2277 pvc->vcore_state = VCORE_PIGGYBACK;
2278 if (cip->total_threads >= target_threads)
2279 break;
2280 }
2281 spin_unlock(&lp->lock);
2282}
2283
2284static void post_guest_process(struct kvmppc_vcore *vc, bool is_master)
25fedfca 2285{
7b5f8272 2286 int still_running = 0, i;
25fedfca
PM		 2287 u64 now;
2288 long ret;
7b5f8272 2289 struct kvm_vcpu *vcpu;
25fedfca 2290
ec257165 2291 spin_lock(&vc->lock);
25fedfca 2292 now = get_tb();
7b5f8272 2293 for_each_runnable_thread(i, vcpu, vc) {
25fedfca
PM		 2294 /* cancel pending dec exception if dec is positive */
2295 if (now < vcpu->arch.dec_expires &&
2296 kvmppc_core_pending_dec(vcpu))
2297 kvmppc_core_dequeue_dec(vcpu);
2298
2299 trace_kvm_guest_exit(vcpu);
2300
2301 ret = RESUME_GUEST;
2302 if (vcpu->arch.trap)
2303 ret = kvmppc_handle_exit_hv(vcpu->arch.kvm_run, vcpu,
2304 vcpu->arch.run_task);
2305
2306 vcpu->arch.ret = ret;
2307 vcpu->arch.trap = 0;
2308
ec257165
PM		 2309 if (is_kvmppc_resume_guest(vcpu->arch.ret)) {
2310 if (vcpu->arch.pending_exceptions)
2311 kvmppc_core_prepare_to_enter(vcpu);
2312 if (vcpu->arch.ceded)
25fedfca 2313 kvmppc_set_timer(vcpu);
ec257165
PM		 2314 else
2315 ++still_running;
2316 } else {
25fedfca
PM		 2317 kvmppc_remove_runnable(vc, vcpu);
2318 wake_up(&vcpu->arch.cpu_run);
2319 }
2320 }
ec257165
PM		 2321 list_del_init(&vc->preempt_list);
2322 if (!is_master) {
563a1e93 2323 if (still_running > 0) {
ec257165 2324 kvmppc_vcore_preempt(vc);
563a1e93
PM		 2325 } else if (vc->runner) {
2326 vc->vcore_state = VCORE_PREEMPT;
2327 kvmppc_core_start_stolen(vc);
2328 } else {
2329 vc->vcore_state = VCORE_INACTIVE;
2330 }
ec257165
PM		 2331 if (vc->n_runnable > 0 && vc->runner == NULL) {
2332 /* make sure there's a candidate runner awake */
7b5f8272
SJS		 2333 i = -1;
2334 vcpu = next_runnable_thread(vc, &i);
ec257165
PM		 2335 wake_up(&vcpu->arch.cpu_run);
2336 }
2337 }
2338 spin_unlock(&vc->lock);
25fedfca
PM		 2339}
2340
b8e6a87c
SW		 2341/*
2342 * Clear core from the list of active host cores as we are about to
2343 * enter the guest. Only do this if it is the primary thread of the
2344 * core (not if a subcore) that is entering the guest.
2345 */
3f7cd919 2346static inline int kvmppc_clear_host_core(unsigned int cpu)
b8e6a87c
SW		 2347{
2348 int core;
2349
2350 if (!kvmppc_host_rm_ops_hv || cpu_thread_in_core(cpu))
3f7cd919 2351 return 0;
b8e6a87c
SW		 2352 /*
2353 * Memory barrier can be omitted here as we will do a smp_wmb()
2354 * later in kvmppc_start_thread and we need ensure that state is
2355 * visible to other CPUs only after we enter guest.
2356 */
2357 core = cpu >> threads_shift;
2358 kvmppc_host_rm_ops_hv->rm_core[core].rm_state.in_host = 0;
3f7cd919 2359 return 0;
b8e6a87c
SW		 2360}
2361
2362/*
2363 * Advertise this core as an active host core since we exited the guest
2364 * Only need to do this if it is the primary thread of the core that is
2365 * exiting.
2366 */
3f7cd919 2367static inline int kvmppc_set_host_core(unsigned int cpu)
b8e6a87c
SW		 2368{
2369 int core;
2370
2371 if (!kvmppc_host_rm_ops_hv || cpu_thread_in_core(cpu))
3f7cd919 2372 return 0;
b8e6a87c
SW		 2373
2374 /*
2375 * Memory barrier can be omitted here because we do a spin_unlock
2376 * immediately after this which provides the memory barrier.
2377 */
2378 core = cpu >> threads_shift;
2379 kvmppc_host_rm_ops_hv->rm_core[core].rm_state.in_host = 1;
3f7cd919 2380 return 0;
b8e6a87c
SW		 2381}
2382
371fefd6
PM		 2383/*
2384 * Run a set of guest threads on a physical core.
2385 * Called with vc->lock held.
2386 */
66feed61 2387static noinline void kvmppc_run_core(struct kvmppc_vcore *vc)
371fefd6 2388{
7b5f8272 2389 struct kvm_vcpu *vcpu;
d911f0be 2390 int i;
2c9097e4 2391 int srcu_idx;
ec257165
PM		 2392 struct core_info core_info;
2393 struct kvmppc_vcore *pvc, *vcnext;
b4deba5c
PM		 2394 struct kvm_split_mode split_info, *sip;
2395 int split, subcore_size, active;
2396 int sub;
2397 bool thr0_done;
2398 unsigned long cmd_bit, stat_bit;
ec257165
PM		 2399 int pcpu, thr;
2400 int target_threads;
45c940ba 2401 int controlled_threads;
371fefd6 2402
d911f0be
PM		 2403 /*
2404 * Remove from the list any threads that have a signal pending
2405 * or need a VPA update done
2406 */
2407 prepare_threads(vc);
2408
2409 /* if the runner is no longer runnable, let the caller pick a new one */
2410 if (vc->runner->arch.state != KVMPPC_VCPU_RUNNABLE)
2411 return;
081f323b
PM		 2412
2413 /*
d911f0be 2414 * Initialize *vc.
081f323b 2415 */
ec257165 2416 init_master_vcore(vc);
2711e248 2417 vc->preempt_tb = TB_NIL;
081f323b 2418
45c940ba
PM		 2419 /*
2420 * Number of threads that we will be controlling: the same as
2421 * the number of threads per subcore, except on POWER9,
2422 * where it's 1 because the threads are (mostly) independent.
2423 */
2424 controlled_threads = threads_per_vcore();
2425
7b444c67 2426 /*
3102f784
ME		 2427 * Make sure we are running on primary threads, and that secondary
2428 * threads are offline. Also check if the number of threads in this
2429 * guest are greater than the current system threads per guest.
7b444c67 2430 */
45c940ba 2431 if ((controlled_threads > 1) &&
3102f784 2432 ((vc->num_threads > threads_per_subcore) || !on_primary_thread())) {
7b5f8272 2433 for_each_runnable_thread(i, vcpu, vc) {
7b444c67 2434 vcpu->arch.ret = -EBUSY;
25fedfca
PM		 2435 kvmppc_remove_runnable(vc, vcpu);
2436 wake_up(&vcpu->arch.cpu_run);
2437 }
7b444c67
PM		 2438 goto out;
2439 }
2440
ec257165
PM		 2441 /*
2442 * See if we could run any other vcores on the physical core
2443 * along with this one.
2444 */
2445 init_core_info(&core_info, vc);
2446 pcpu = smp_processor_id();
45c940ba 2447 target_threads = controlled_threads;
ec257165
PM		 2448 if (target_smt_mode && target_smt_mode < target_threads)
2449 target_threads = target_smt_mode;
2450 if (vc->num_threads < target_threads)
2451 collect_piggybacks(&core_info, target_threads);
3102f784 2452
b4deba5c
PM		 2453 /* Decide on micro-threading (split-core) mode */
2454 subcore_size = threads_per_subcore;
2455 cmd_bit = stat_bit = 0;
2456 split = core_info.n_subcores;
2457 sip = NULL;
2458 if (split > 1) {
2459 /* threads_per_subcore must be MAX_SMT_THREADS (8) here */
2460 if (split == 2 && (dynamic_mt_modes & 2)) {
2461 cmd_bit = HID0_POWER8_1TO2LPAR;
2462 stat_bit = HID0_POWER8_2LPARMODE;
2463 } else {
2464 split = 4;
2465 cmd_bit = HID0_POWER8_1TO4LPAR;
2466 stat_bit = HID0_POWER8_4LPARMODE;
2467 }
2468 subcore_size = MAX_SMT_THREADS / split;
2469 sip = &split_info;
2470 memset(&split_info, 0, sizeof(split_info));
2471 split_info.rpr = mfspr(SPRN_RPR);
2472 split_info.pmmar = mfspr(SPRN_PMMAR);
2473 split_info.ldbar = mfspr(SPRN_LDBAR);
2474 split_info.subcore_size = subcore_size;
2475 for (sub = 0; sub < core_info.n_subcores; ++sub)
2476 split_info.master_vcs[sub] =
2477 list_first_entry(&core_info.vcs[sub],
2478 struct kvmppc_vcore, preempt_list);
2479 /* order writes to split_info before kvm_split_mode pointer */
2480 smp_wmb();
2481 }
2482 pcpu = smp_processor_id();
45c940ba 2483 for (thr = 0; thr < controlled_threads; ++thr)
b4deba5c
PM		 2484 paca[pcpu + thr].kvm_hstate.kvm_split_mode = sip;
2485
2486 /* Initiate micro-threading (split-core) if required */
2487 if (cmd_bit) {
2488 unsigned long hid0 = mfspr(SPRN_HID0);
2489
2490 hid0 |= cmd_bit | HID0_POWER8_DYNLPARDIS;
2491 mb();
2492 mtspr(SPRN_HID0, hid0);
2493 isync();
2494 for (;;) {
2495 hid0 = mfspr(SPRN_HID0);
2496 if (hid0 & stat_bit)
2497 break;
2498 cpu_relax();
ec257165 2499 }
2e25aa5f 2500 }
3102f784 2501
b8e6a87c
SW		 2502 kvmppc_clear_host_core(pcpu);
2503
b4deba5c
PM		 2504 /* Start all the threads */
2505 active = 0;
2506 for (sub = 0; sub < core_info.n_subcores; ++sub) {
2507 thr = subcore_thread_map[sub];
2508 thr0_done = false;
2509 active |= 1 << thr;
2510 list_for_each_entry(pvc, &core_info.vcs[sub], preempt_list) {
2511 pvc->pcpu = pcpu + thr;
7b5f8272 2512 for_each_runnable_thread(i, vcpu, pvc) {
b4deba5c
PM		 2513 kvmppc_start_thread(vcpu, pvc);
2514 kvmppc_create_dtl_entry(vcpu, pvc);
2515 trace_kvm_guest_enter(vcpu);
2516 if (!vcpu->arch.ptid)
2517 thr0_done = true;
2518 active |= 1 << (thr + vcpu->arch.ptid);
2519 }
2520 /*
2521 * We need to start the first thread of each subcore
2522 * even if it doesn't have a vcpu.
2523 */
2524 if (pvc->master_vcore == pvc && !thr0_done)
2525 kvmppc_start_thread(NULL, pvc);
2526 thr += pvc->num_threads;
2527 }
2e25aa5f 2528 }
371fefd6 2529
7f235328
GS		 2530 /*
2531 * Ensure that split_info.do_nap is set after setting
2532 * the vcore pointer in the PACA of the secondaries.
2533 */
2534 smp_mb();
2535 if (cmd_bit)
2536 split_info.do_nap = 1; /* ask secondaries to nap when done */
2537
b4deba5c
PM		 2538 /*
2539 * When doing micro-threading, poke the inactive threads as well.
2540 * This gets them to the nap instruction after kvm_do_nap,
2541 * which reduces the time taken to unsplit later.
2542 */
2543 if (split > 1)
2544 for (thr = 1; thr < threads_per_subcore; ++thr)
2545 if (!(active & (1 << thr)))
2546 kvmppc_ipi_thread(pcpu + thr);
e0b7ec05 2547
2f12f034 2548 vc->vcore_state = VCORE_RUNNING;
19ccb76a 2549 preempt_disable();
3c78f78a
SW		 2550
2551 trace_kvmppc_run_core(vc, 0);
2552
b4deba5c
PM		 2553 for (sub = 0; sub < core_info.n_subcores; ++sub)
2554 list_for_each_entry(pvc, &core_info.vcs[sub], preempt_list)
2555 spin_unlock(&pvc->lock);
de56a948 2556
6edaa530 2557 guest_enter();
2c9097e4 2558
e0b7ec05 2559 srcu_idx = srcu_read_lock(&vc->kvm->srcu);
2c9097e4 2560
e0b7ec05 2561 __kvmppc_vcore_entry();
de56a948 2562
ec257165
PM		 2563 srcu_read_unlock(&vc->kvm->srcu, srcu_idx);
2564
2565 spin_lock(&vc->lock);
371fefd6 2566 /* prevent other vcpu threads from doing kvmppc_start_thread() now */
19ccb76a 2567 vc->vcore_state = VCORE_EXITING;
371fefd6 2568
19ccb76a 2569 /* wait for secondary threads to finish writing their state to memory */
5d5b99cd 2570 kvmppc_wait_for_nap();
b4deba5c
PM		 2571
2572 /* Return to whole-core mode if we split the core earlier */
2573 if (split > 1) {
2574 unsigned long hid0 = mfspr(SPRN_HID0);
2575 unsigned long loops = 0;
2576
2577 hid0 &= ~HID0_POWER8_DYNLPARDIS;
2578 stat_bit = HID0_POWER8_2LPARMODE | HID0_POWER8_4LPARMODE;
2579 mb();
2580 mtspr(SPRN_HID0, hid0);
2581 isync();
2582 for (;;) {
2583 hid0 = mfspr(SPRN_HID0);
2584 if (!(hid0 & stat_bit))
2585 break;
2586 cpu_relax();
2587 ++loops;
2588 }
2589 split_info.do_nap = 0;
2590 }
2591
2592 /* Let secondaries go back to the offline loop */
45c940ba 2593 for (i = 0; i < controlled_threads; ++i) {
b4deba5c
PM		 2594 kvmppc_release_hwthread(pcpu + i);
2595 if (sip && sip->napped[i])
2596 kvmppc_ipi_thread(pcpu + i);
a29ebeaf 2597 cpumask_clear_cpu(pcpu + i, &vc->kvm->arch.cpu_in_guest);
b4deba5c
PM		 2598 }
2599
b8e6a87c
SW		 2600 kvmppc_set_host_core(pcpu);
2601
371fefd6 2602 spin_unlock(&vc->lock);
2c9097e4 2603
371fefd6
PM		 2604 /* make sure updates to secondary vcpu structs are visible now */
2605 smp_mb();
6edaa530 2606 guest_exit();
de56a948 2607
b4deba5c
PM		 2608 for (sub = 0; sub < core_info.n_subcores; ++sub)
2609 list_for_each_entry_safe(pvc, vcnext, &core_info.vcs[sub],
2610 preempt_list)
2611 post_guest_process(pvc, pvc == vc);
de56a948 2612
913d3ff9 2613 spin_lock(&vc->lock);
ec257165 2614 preempt_enable();
de56a948
PM		 2615
2616 out:
19ccb76a 2617 vc->vcore_state = VCORE_INACTIVE;
3c78f78a 2618 trace_kvmppc_run_core(vc, 1);
371fefd6
PM		 2619}
2620
19ccb76a
PM		 2621/*
2622 * Wait for some other vcpu thread to execute us, and
2623 * wake us up when we need to handle something in the host.
2624 */
ec257165
PM		 2625static void kvmppc_wait_for_exec(struct kvmppc_vcore *vc,
2626 struct kvm_vcpu *vcpu, int wait_state)
371fefd6 2627{
371fefd6
PM		 2628 DEFINE_WAIT(wait);
2629
19ccb76a 2630 prepare_to_wait(&vcpu->arch.cpu_run, &wait, wait_state);
ec257165
PM		 2631 if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) {
2632 spin_unlock(&vc->lock);
19ccb76a 2633 schedule();
ec257165
PM		 2634 spin_lock(&vc->lock);
2635 }
19ccb76a
PM		 2636 finish_wait(&vcpu->arch.cpu_run, &wait);
2637}
2638
0cda69dd
SJS		 2639static void grow_halt_poll_ns(struct kvmppc_vcore *vc)
2640{
2641 /* 10us base */
2642 if (vc->halt_poll_ns == 0 && halt_poll_ns_grow)
2643 vc->halt_poll_ns = 10000;
2644 else
2645 vc->halt_poll_ns *= halt_poll_ns_grow;
0cda69dd
SJS		 2646}
2647
2648static void shrink_halt_poll_ns(struct kvmppc_vcore *vc)
2649{
2650 if (halt_poll_ns_shrink == 0)
2651 vc->halt_poll_ns = 0;
2652 else
2653 vc->halt_poll_ns /= halt_poll_ns_shrink;
2654}
2655
908a0935
SJS		 2656/*
2657 * Check to see if any of the runnable vcpus on the vcore have pending
0cda69dd
SJS		 2658 * exceptions or are no longer ceded
2659 */
2660static int kvmppc_vcore_check_block(struct kvmppc_vcore *vc)
2661{
2662 struct kvm_vcpu *vcpu;
2663 int i;
2664
2665 for_each_runnable_thread(i, vcpu, vc) {
8464c884
PM		 2666 if (vcpu->arch.pending_exceptions || !vcpu->arch.ceded ||
2667 vcpu->arch.prodded)
0cda69dd
SJS		 2668 return 1;
2669 }
2670
2671 return 0;
2672}
2673
19ccb76a
PM		 2674/*
2675 * All the vcpus in this vcore are idle, so wait for a decrementer
2676 * or external interrupt to one of the vcpus. vc->lock is held.
2677 */
2678static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc)
2679{
2a27f514 2680 ktime_t cur, start_poll, start_wait;
0cda69dd 2681 int do_sleep = 1;
0cda69dd 2682 u64 block_ns;
8577370f 2683 DECLARE_SWAITQUEUE(wait);
1bc5d59c 2684
0cda69dd 2685 /* Poll for pending exceptions and ceded state */
2a27f514 2686 cur = start_poll = ktime_get();
0cda69dd 2687 if (vc->halt_poll_ns) {
2a27f514
SJS		 2688 ktime_t stop = ktime_add_ns(start_poll, vc->halt_poll_ns);
2689 ++vc->runner->stat.halt_attempted_poll;
1bc5d59c 2690
0cda69dd
SJS		 2691 vc->vcore_state = VCORE_POLLING;
2692 spin_unlock(&vc->lock);
2693
2694 do {
2695 if (kvmppc_vcore_check_block(vc)) {
2696 do_sleep = 0;
2697 break;
2698 }
2699 cur = ktime_get();
2700 } while (single_task_running() && ktime_before(cur, stop));
2701
2702 spin_lock(&vc->lock);
2703 vc->vcore_state = VCORE_INACTIVE;
2704
2a27f514
SJS		 2705 if (!do_sleep) {
2706 ++vc->runner->stat.halt_successful_poll;
0cda69dd 2707 goto out;
2a27f514 2708 }
1bc5d59c
SW		 2709 }
2710
0cda69dd
SJS		 2711 prepare_to_swait(&vc->wq, &wait, TASK_INTERRUPTIBLE);
2712
2713 if (kvmppc_vcore_check_block(vc)) {
8577370f 2714 finish_swait(&vc->wq, &wait);
0cda69dd 2715 do_sleep = 0;
2a27f514
SJS		 2716 /* If we polled, count this as a successful poll */
2717 if (vc->halt_poll_ns)
2718 ++vc->runner->stat.halt_successful_poll;
0cda69dd 2719 goto out;
1bc5d59c
SW		 2720 }
2721
2a27f514
SJS		 2722 start_wait = ktime_get();
2723
19ccb76a 2724 vc->vcore_state = VCORE_SLEEPING;
3c78f78a 2725 trace_kvmppc_vcore_blocked(vc, 0);
19ccb76a 2726 spin_unlock(&vc->lock);
913d3ff9 2727 schedule();
8577370f 2728 finish_swait(&vc->wq, &wait);
19ccb76a
PM		 2729 spin_lock(&vc->lock);
2730 vc->vcore_state = VCORE_INACTIVE;
3c78f78a 2731 trace_kvmppc_vcore_blocked(vc, 1);
2a27f514 2732 ++vc->runner->stat.halt_successful_wait;
0cda69dd
SJS		 2733
2734 cur = ktime_get();
2735
2736out:
2a27f514
SJS		 2737 block_ns = ktime_to_ns(cur) - ktime_to_ns(start_poll);
2738
2739 /* Attribute wait time */
2740 if (do_sleep) {
2741 vc->runner->stat.halt_wait_ns +=
2742 ktime_to_ns(cur) - ktime_to_ns(start_wait);
2743 /* Attribute failed poll time */
2744 if (vc->halt_poll_ns)
2745 vc->runner->stat.halt_poll_fail_ns +=
2746 ktime_to_ns(start_wait) -
2747 ktime_to_ns(start_poll);
2748 } else {
2749 /* Attribute successful poll time */
2750 if (vc->halt_poll_ns)
2751 vc->runner->stat.halt_poll_success_ns +=
2752 ktime_to_ns(cur) -
2753 ktime_to_ns(start_poll);
2754 }
0cda69dd
SJS		 2755
2756 /* Adjust poll time */
307d93e4 2757 if (halt_poll_ns) {
0cda69dd
SJS		 2758 if (block_ns <= vc->halt_poll_ns)
2759 ;
2760 /* We slept and blocked for longer than the max halt time */
307d93e4 2761 else if (vc->halt_poll_ns && block_ns > halt_poll_ns)
0cda69dd
SJS		 2762 shrink_halt_poll_ns(vc);
2763 /* We slept and our poll time is too small */
307d93e4
SJS		 2764 else if (vc->halt_poll_ns < halt_poll_ns &&
2765 block_ns < halt_poll_ns)
0cda69dd 2766 grow_halt_poll_ns(vc);
e03f3921
SJS		 2767 if (vc->halt_poll_ns > halt_poll_ns)
2768 vc->halt_poll_ns = halt_poll_ns;
0cda69dd
SJS		 2769 } else
2770 vc->halt_poll_ns = 0;
2771
2772 trace_kvmppc_vcore_wakeup(do_sleep, block_ns);
19ccb76a 2773}
371fefd6 2774
19ccb76a
PM		 2775static int kvmppc_run_vcpu(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
2776{
7b5f8272 2777 int n_ceded, i;
19ccb76a 2778 struct kvmppc_vcore *vc;
7b5f8272 2779 struct kvm_vcpu *v;
9e368f29 2780
3c78f78a
SW		 2781 trace_kvmppc_run_vcpu_enter(vcpu);
2782
371fefd6
PM		 2783 kvm_run->exit_reason = 0;
2784 vcpu->arch.ret = RESUME_GUEST;
2785 vcpu->arch.trap = 0;
2f12f034 2786 kvmppc_update_vpas(vcpu);
371fefd6 2787
371fefd6
PM		 2788 /*
2789 * Synchronize with other threads in this virtual core
2790 */
2791 vc = vcpu->arch.vcore;
2792 spin_lock(&vc->lock);
19ccb76a 2793 vcpu->arch.ceded = 0;
371fefd6
PM		 2794 vcpu->arch.run_task = current;
2795 vcpu->arch.kvm_run = kvm_run;
c7b67670 2796 vcpu->arch.stolen_logged = vcore_stolen_time(vc, mftb());
19ccb76a 2797 vcpu->arch.state = KVMPPC_VCPU_RUNNABLE;
c7b67670 2798 vcpu->arch.busy_preempt = TB_NIL;
7b5f8272 2799 WRITE_ONCE(vc->runnable_threads[vcpu->arch.ptid], vcpu);
371fefd6
PM		 2800 ++vc->n_runnable;
2801
19ccb76a
PM		 2802 /*
2803 * This happens the first time this is called for a vcpu.
2804 * If the vcore is already running, we may be able to start
2805 * this thread straight away and have it join in.
2806 */
8455d79e 2807 if (!signal_pending(current)) {
ec257165
PM		 2808 if (vc->vcore_state == VCORE_PIGGYBACK) {
2809 struct kvmppc_vcore *mvc = vc->master_vcore;
2810 if (spin_trylock(&mvc->lock)) {
2811 if (mvc->vcore_state == VCORE_RUNNING &&
2812 !VCORE_IS_EXITING(mvc)) {
2813 kvmppc_create_dtl_entry(vcpu, vc);
b4deba5c 2814 kvmppc_start_thread(vcpu, vc);
ec257165
PM		 2815 trace_kvm_guest_enter(vcpu);
2816 }
2817 spin_unlock(&mvc->lock);
2818 }
2819 } else if (vc->vcore_state == VCORE_RUNNING &&
2820 !VCORE_IS_EXITING(vc)) {
2f12f034 2821 kvmppc_create_dtl_entry(vcpu, vc);
b4deba5c 2822 kvmppc_start_thread(vcpu, vc);
3c78f78a 2823 trace_kvm_guest_enter(vcpu);
8455d79e 2824 } else if (vc->vcore_state == VCORE_SLEEPING) {
8577370f 2825 swake_up(&vc->wq);
371fefd6
PM		 2826 }
2827
8455d79e 2828 }
371fefd6 2829
19ccb76a
PM		 2830 while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE &&
2831 !signal_pending(current)) {
ec257165
PM		 2832 if (vc->vcore_state == VCORE_PREEMPT && vc->runner == NULL)
2833 kvmppc_vcore_end_preempt(vc);
2834
8455d79e 2835 if (vc->vcore_state != VCORE_INACTIVE) {
ec257165 2836 kvmppc_wait_for_exec(vc, vcpu, TASK_INTERRUPTIBLE);
19ccb76a
PM		 2837 continue;
2838 }
7b5f8272 2839 for_each_runnable_thread(i, v, vc) {
7e28e60e 2840 kvmppc_core_prepare_to_enter(v);
19ccb76a
PM		 2841 if (signal_pending(v->arch.run_task)) {
2842 kvmppc_remove_runnable(vc, v);
2843 v->stat.signal_exits++;
2844 v->arch.kvm_run->exit_reason = KVM_EXIT_INTR;
2845 v->arch.ret = -EINTR;
2846 wake_up(&v->arch.cpu_run);
2847 }
2848 }
8455d79e
PM		 2849 if (!vc->n_runnable || vcpu->arch.state != KVMPPC_VCPU_RUNNABLE)
2850 break;
8455d79e 2851 n_ceded = 0;
7b5f8272 2852 for_each_runnable_thread(i, v, vc) {
8464c884 2853 if (!v->arch.pending_exceptions && !v->arch.prodded)
8455d79e 2854 n_ceded += v->arch.ceded;
4619ac88
PM		 2855 else
2856 v->arch.ceded = 0;
2857 }
25fedfca
PM		 2858 vc->runner = vcpu;
2859 if (n_ceded == vc->n_runnable) {
8455d79e 2860 kvmppc_vcore_blocked(vc);
c56dadf3 2861 } else if (need_resched()) {
ec257165 2862 kvmppc_vcore_preempt(vc);
25fedfca
PM		 2863 /* Let something else run */
2864 cond_resched_lock(&vc->lock);
ec257165
PM		 2865 if (vc->vcore_state == VCORE_PREEMPT)
2866 kvmppc_vcore_end_preempt(vc);
25fedfca 2867 } else {
8455d79e 2868 kvmppc_run_core(vc);
25fedfca 2869 }
0456ec4f 2870 vc->runner = NULL;
19ccb76a 2871 }
371fefd6 2872
8455d79e
PM		 2873 while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE &&
2874 (vc->vcore_state == VCORE_RUNNING ||
5fc3e64f
PM		 2875 vc->vcore_state == VCORE_EXITING ||
2876 vc->vcore_state == VCORE_PIGGYBACK))
ec257165 2877 kvmppc_wait_for_exec(vc, vcpu, TASK_UNINTERRUPTIBLE);
8455d79e 2878
5fc3e64f
PM		 2879 if (vc->vcore_state == VCORE_PREEMPT && vc->runner == NULL)
2880 kvmppc_vcore_end_preempt(vc);
2881
8455d79e
PM		 2882 if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) {
2883 kvmppc_remove_runnable(vc, vcpu);
2884 vcpu->stat.signal_exits++;
2885 kvm_run->exit_reason = KVM_EXIT_INTR;
2886 vcpu->arch.ret = -EINTR;
2887 }
2888
2889 if (vc->n_runnable && vc->vcore_state == VCORE_INACTIVE) {
2890 /* Wake up some vcpu to run the core */
7b5f8272
SJS		 2891 i = -1;
2892 v = next_runnable_thread(vc, &i);
8455d79e 2893 wake_up(&v->arch.cpu_run);
371fefd6
PM		 2894 }
2895
3c78f78a 2896 trace_kvmppc_run_vcpu_exit(vcpu, kvm_run);
371fefd6 2897 spin_unlock(&vc->lock);
371fefd6 2898 return vcpu->arch.ret;
de56a948
PM		 2899}
2900
3a167bea 2901static int kvmppc_vcpu_run_hv(struct kvm_run *run, struct kvm_vcpu *vcpu)
a8606e20
PM		 2902{
2903 int r;
913d3ff9 2904 int srcu_idx;
a8606e20 2905
af8f38b3
AG		 2906 if (!vcpu->arch.sane) {
2907 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
2908 return -EINVAL;
2909 }
2910
25051b5a
SW		 2911 kvmppc_core_prepare_to_enter(vcpu);
2912
19ccb76a
PM		 2913 /* No need to go into the guest when all we'll do is come back out */
2914 if (signal_pending(current)) {
2915 run->exit_reason = KVM_EXIT_INTR;
2916 return -EINTR;
2917 }
2918
32fad281 2919 atomic_inc(&vcpu->kvm->arch.vcpus_running);
31037eca 2920 /* Order vcpus_running vs. hpte_setup_done, see kvmppc_alloc_reset_hpt */
32fad281
PM		 2921 smp_mb();
2922
c17b98cf 2923 /* On the first time here, set up HTAB and VRMA */
8cf4ecc0 2924 if (!kvm_is_radix(vcpu->kvm) && !vcpu->kvm->arch.hpte_setup_done) {
32fad281 2925 r = kvmppc_hv_setup_htab_rma(vcpu);
c77162de 2926 if (r)
32fad281 2927 goto out;
c77162de 2928 }
19ccb76a 2929
579e633e
AB		 2930 flush_all_to_thread(current);
2931
19ccb76a 2932 vcpu->arch.wqp = &vcpu->arch.vcore->wq;
342d3db7 2933 vcpu->arch.pgdir = current->mm->pgd;
c7b67670 2934 vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST;
19ccb76a 2935
a8606e20
PM		 2936 do {
2937 r = kvmppc_run_vcpu(run, vcpu);
2938
2939 if (run->exit_reason == KVM_EXIT_PAPR_HCALL &&
2940 !(vcpu->arch.shregs.msr & MSR_PR)) {
3c78f78a 2941 trace_kvm_hcall_enter(vcpu);
a8606e20 2942 r = kvmppc_pseries_do_hcall(vcpu);
3c78f78a 2943 trace_kvm_hcall_exit(vcpu, r);
7e28e60e 2944 kvmppc_core_prepare_to_enter(vcpu);
913d3ff9
PM		 2945 } else if (r == RESUME_PAGE_FAULT) {
2946 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
2947 r = kvmppc_book3s_hv_page_fault(run, vcpu,
2948 vcpu->arch.fault_dar, vcpu->arch.fault_dsisr);
2949 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
f7af5209
SW		 2950 } else if (r == RESUME_PASSTHROUGH)
2951 r = kvmppc_xics_rm_complete(vcpu, 0);
e59d24e6 2952 } while (is_kvmppc_resume_guest(r));
32fad281
PM		 2953
2954 out:
c7b67670 2955 vcpu->arch.state = KVMPPC_VCPU_NOTREADY;
32fad281 2956 atomic_dec(&vcpu->kvm->arch.vcpus_running);
a8606e20
PM		 2957 return r;
2958}
2959
5b74716e
BH		 2960static void kvmppc_add_seg_page_size(struct kvm_ppc_one_seg_page_size **sps,
2961 int linux_psize)
2962{
2963 struct mmu_psize_def *def = &mmu_psize_defs[linux_psize];
2964
2965 if (!def->shift)
2966 return;
2967 (*sps)->page_shift = def->shift;
2968 (*sps)->slb_enc = def->sllp;
2969 (*sps)->enc[0].page_shift = def->shift;
b1022fbd 2970 (*sps)->enc[0].pte_enc = def->penc[linux_psize];
1f365bb0
AK		 2971 /*
2972 * Add 16MB MPSS support if host supports it
2973 */
2974 if (linux_psize != MMU_PAGE_16M && def->penc[MMU_PAGE_16M] != -1) {
2975 (*sps)->enc[1].page_shift = 24;
2976 (*sps)->enc[1].pte_enc = def->penc[MMU_PAGE_16M];
2977 }
5b74716e
BH		 2978 (*sps)++;
2979}
2980
3a167bea
AK		 2981static int kvm_vm_ioctl_get_smmu_info_hv(struct kvm *kvm,
2982 struct kvm_ppc_smmu_info *info)
5b74716e
BH		 2983{
2984 struct kvm_ppc_one_seg_page_size *sps;
2985
8cf4ecc0
PM		 2986 /*
2987 * Since we don't yet support HPT guests on a radix host,
2988 * return an error if the host uses radix.
2989 */
2990 if (radix_enabled())
2991 return -EINVAL;
2992
5b74716e
BH		 2993 info->flags = KVM_PPC_PAGE_SIZES_REAL;
2994 if (mmu_has_feature(MMU_FTR_1T_SEGMENT))
2995 info->flags |= KVM_PPC_1T_SEGMENTS;
2996 info->slb_size = mmu_slb_size;
2997
2998 /* We only support these sizes for now, and no muti-size segments */
2999 sps = &info->sps[0];
3000 kvmppc_add_seg_page_size(&sps, MMU_PAGE_4K);
3001 kvmppc_add_seg_page_size(&sps, MMU_PAGE_64K);
3002 kvmppc_add_seg_page_size(&sps, MMU_PAGE_16M);
3003
3004 return 0;
3005}
3006
82ed3616
PM		 3007/*
3008 * Get (and clear) the dirty memory log for a memory slot.
3009 */
3a167bea
AK		 3010static int kvm_vm_ioctl_get_dirty_log_hv(struct kvm *kvm,
3011 struct kvm_dirty_log *log)
82ed3616 3012{
9f6b8029 3013 struct kvm_memslots *slots;
82ed3616 3014 struct kvm_memory_slot *memslot;
8f7b79b8 3015 int i, r;
82ed3616 3016 unsigned long n;
8f7b79b8
PM		 3017 unsigned long *buf;
3018 struct kvm_vcpu *vcpu;
82ed3616
PM		 3019
3020 mutex_lock(&kvm->slots_lock);
3021
3022 r = -EINVAL;
bbacc0c1 3023 if (log->slot >= KVM_USER_MEM_SLOTS)
82ed3616
PM		 3024 goto out;
3025
9f6b8029
PB		 3026 slots = kvm_memslots(kvm);
3027 memslot = id_to_memslot(slots, log->slot);
82ed3616
PM		 3028 r = -ENOENT;
3029 if (!memslot->dirty_bitmap)
3030 goto out;
3031
8f7b79b8
PM		 3032 /*
3033 * Use second half of bitmap area because radix accumulates
3034 * bits in the first half.
3035 */
82ed3616 3036 n = kvm_dirty_bitmap_bytes(memslot);
8f7b79b8
PM		 3037 buf = memslot->dirty_bitmap + n / sizeof(long);
3038 memset(buf, 0, n);
82ed3616 3039
8f7b79b8
PM		 3040 if (kvm_is_radix(kvm))
3041 r = kvmppc_hv_get_dirty_log_radix(kvm, memslot, buf);
3042 else
3043 r = kvmppc_hv_get_dirty_log_hpt(kvm, memslot, buf);
82ed3616
PM		 3044 if (r)
3045 goto out;
3046
8f7b79b8
PM		 3047 /* Harvest dirty bits from VPA and DTL updates */
3048 /* Note: we never modify the SLB shadow buffer areas */
3049 kvm_for_each_vcpu(i, vcpu, kvm) {
3050 spin_lock(&vcpu->arch.vpa_update_lock);
3051 kvmppc_harvest_vpa_dirty(&vcpu->arch.vpa, memslot, buf);
3052 kvmppc_harvest_vpa_dirty(&vcpu->arch.dtl, memslot, buf);
3053 spin_unlock(&vcpu->arch.vpa_update_lock);
3054 }
3055
82ed3616 3056 r = -EFAULT;
8f7b79b8 3057 if (copy_to_user(log->dirty_bitmap, buf, n))
82ed3616
PM		 3058 goto out;
3059
3060 r = 0;
3061out:
3062 mutex_unlock(&kvm->slots_lock);
3063 return r;
3064}
3065
3a167bea
AK		 3066static void kvmppc_core_free_memslot_hv(struct kvm_memory_slot *free,
3067 struct kvm_memory_slot *dont)
a66b48c3
PM		 3068{
3069 if (!dont || free->arch.rmap != dont->arch.rmap) {
3070 vfree(free->arch.rmap);
3071 free->arch.rmap = NULL;
b2b2f165 3072 }
a66b48c3
PM		 3073}
3074
3a167bea
AK		 3075static int kvmppc_core_create_memslot_hv(struct kvm_memory_slot *slot,
3076 unsigned long npages)
a66b48c3 3077{
8cf4ecc0
PM		 3078 /*
3079 * For now, if radix_enabled() then we only support radix guests,
3080 * and in that case we don't need the rmap array.
3081 */
3082 if (radix_enabled()) {
3083 slot->arch.rmap = NULL;
3084 return 0;
3085 }
3086
a66b48c3
PM		 3087 slot->arch.rmap = vzalloc(npages * sizeof(*slot->arch.rmap));
3088 if (!slot->arch.rmap)
3089 return -ENOMEM;
aa04b4cc 3090
c77162de
PM		 3091 return 0;
3092}
aa04b4cc 3093
3a167bea
AK		 3094static int kvmppc_core_prepare_memory_region_hv(struct kvm *kvm,
3095 struct kvm_memory_slot *memslot,
09170a49 3096 const struct kvm_userspace_memory_region *mem)
c77162de 3097{
a66b48c3 3098 return 0;
c77162de
PM		 3099}
3100
3a167bea 3101static void kvmppc_core_commit_memory_region_hv(struct kvm *kvm,
09170a49 3102 const struct kvm_userspace_memory_region *mem,
f36f3f28
PB		 3103 const struct kvm_memory_slot *old,
3104 const struct kvm_memory_slot *new)
c77162de 3105{
dfe49dbd 3106 unsigned long npages = mem->memory_size >> PAGE_SHIFT;
9f6b8029 3107 struct kvm_memslots *slots;
dfe49dbd
PM		 3108 struct kvm_memory_slot *memslot;
3109
a56ee9f8
YX		 3110 /*
3111 * If we are making a new memslot, it might make
3112 * some address that was previously cached as emulated
3113 * MMIO be no longer emulated MMIO, so invalidate
3114 * all the caches of emulated MMIO translations.
3115 */
3116 if (npages)
3117 atomic64_inc(&kvm->arch.mmio_update);
3118
8f7b79b8 3119 if (npages && old->npages && !kvm_is_radix(kvm)) {
dfe49dbd
PM		 3120 /*
3121 * If modifying a memslot, reset all the rmap dirty bits.
3122 * If this is a new memslot, we don't need to do anything
3123 * since the rmap array starts out as all zeroes,
3124 * i.e. no pages are dirty.
3125 */
9f6b8029
PB		 3126 slots = kvm_memslots(kvm);
3127 memslot = id_to_memslot(slots, mem->slot);
8f7b79b8 3128 kvmppc_hv_get_dirty_log_hpt(kvm, memslot, NULL);
dfe49dbd 3129 }
c77162de
PM		 3130}
3131
a0144e2a
PM		 3132/*
3133 * Update LPCR values in kvm->arch and in vcores.
3134 * Caller must hold kvm->lock.
3135 */
3136void kvmppc_update_lpcr(struct kvm *kvm, unsigned long lpcr, unsigned long mask)
3137{
3138 long int i;
3139 u32 cores_done = 0;
3140
3141 if ((kvm->arch.lpcr & mask) == lpcr)
3142 return;
3143
3144 kvm->arch.lpcr = (kvm->arch.lpcr & ~mask) | lpcr;
3145
3146 for (i = 0; i < KVM_MAX_VCORES; ++i) {
3147 struct kvmppc_vcore *vc = kvm->arch.vcores[i];
3148 if (!vc)
3149 continue;
3150 spin_lock(&vc->lock);
3151 vc->lpcr = (vc->lpcr & ~mask) | lpcr;
3152 spin_unlock(&vc->lock);
3153 if (++cores_done >= kvm->arch.online_vcores)
3154 break;
3155 }
3156}
3157
3a167bea
AK		 3158static void kvmppc_mmu_destroy_hv(struct kvm_vcpu *vcpu)
3159{
3160 return;
3161}
3162
7a84084c
PM		 3163static void kvmppc_setup_partition_table(struct kvm *kvm)
3164{
3165 unsigned long dw0, dw1;
3166
8cf4ecc0
PM		 3167 if (!kvm_is_radix(kvm)) {
3168 /* PS field - page size for VRMA */
3169 dw0 = ((kvm->arch.vrma_slb_v & SLB_VSID_L) >> 1) |
3170 ((kvm->arch.vrma_slb_v & SLB_VSID_LP) << 1);
3171 /* HTABSIZE and HTABORG fields */
3172 dw0 |= kvm->arch.sdr1;
7a84084c 3173
8cf4ecc0
PM		 3174 /* Second dword as set by userspace */
3175 dw1 = kvm->arch.process_table;
3176 } else {
3177 dw0 = PATB_HR | radix__get_tree_size() |
3178 __pa(kvm->arch.pgtable) | RADIX_PGD_INDEX_SIZE;
3179 dw1 = PATB_GR | kvm->arch.process_table;
3180 }
7a84084c
PM		 3181
3182 mmu_partition_table_set_entry(kvm->arch.lpid, dw0, dw1);
3183}
3184
32fad281 3185static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu)
c77162de
PM		 3186{
3187 int err = 0;
3188 struct kvm *kvm = vcpu->kvm;
c77162de
PM		 3189 unsigned long hva;
3190 struct kvm_memory_slot *memslot;
3191 struct vm_area_struct *vma;
a0144e2a 3192 unsigned long lpcr = 0, senc;
c77162de 3193 unsigned long psize, porder;
2c9097e4 3194 int srcu_idx;
c77162de
PM		 3195
3196 mutex_lock(&kvm->lock);
31037eca 3197 if (kvm->arch.hpte_setup_done)
c77162de 3198 goto out; /* another vcpu beat us to it */
aa04b4cc 3199
32fad281 3200 /* Allocate hashed page table (if not done already) and reset it */
3f9d4f5a 3201 if (!kvm->arch.hpt.virt) {
aae0777f
DG		 3202 int order = KVM_DEFAULT_HPT_ORDER;
3203 struct kvm_hpt_info info;
3204
3205 err = kvmppc_allocate_hpt(&info, order);
3206 /* If we get here, it means userspace didn't specify a
3207 * size explicitly. So, try successively smaller
3208 * sizes if the default failed. */
3209 while ((err == -ENOMEM) && --order >= PPC_MIN_HPT_ORDER)
3210 err = kvmppc_allocate_hpt(&info, order);
3211
3212 if (err < 0) {
32fad281
PM		 3213 pr_err("KVM: Couldn't alloc HPT\n");
3214 goto out;
3215 }
aae0777f
DG		 3216
3217 kvmppc_set_hpt(kvm, &info);
32fad281
PM		 3218 }
3219
c77162de 3220 /* Look up the memslot for guest physical address 0 */
2c9097e4 3221 srcu_idx = srcu_read_lock(&kvm->srcu);
c77162de 3222 memslot = gfn_to_memslot(kvm, 0);
aa04b4cc 3223
c77162de
PM		 3224 /* We must have some memory at 0 by now */
3225 err = -EINVAL;
3226 if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID))
2c9097e4 3227 goto out_srcu;
c77162de
PM		 3228
3229 /* Look up the VMA for the start of this memory slot */
3230 hva = memslot->userspace_addr;
3231 down_read(&current->mm->mmap_sem);
3232 vma = find_vma(current->mm, hva);
3233 if (!vma || vma->vm_start > hva || (vma->vm_flags & VM_IO))
3234 goto up_out;
3235
3236 psize = vma_kernel_pagesize(vma);
da9d1d7f 3237 porder = __ilog2(psize);
c77162de 3238
c77162de
PM		 3239 up_read(&current->mm->mmap_sem);
3240
c17b98cf
PM		 3241 /* We can handle 4k, 64k or 16M pages in the VRMA */
3242 err = -EINVAL;
3243 if (!(psize == 0x1000 || psize == 0x10000 ||
3244 psize == 0x1000000))
3245 goto out_srcu;
c77162de 3246
c17b98cf
PM		 3247 senc = slb_pgsize_encoding(psize);
3248 kvm->arch.vrma_slb_v = senc | SLB_VSID_B_1T |
3249 (VRMA_VSID << SLB_VSID_SHIFT_1T);
c17b98cf
PM		 3250 /* Create HPTEs in the hash page table for the VRMA */
3251 kvmppc_map_vrma(vcpu, memslot, porder);
aa04b4cc 3252
7a84084c
PM		 3253 /* Update VRMASD field in the LPCR */
3254 if (!cpu_has_feature(CPU_FTR_ARCH_300)) {
3255 /* the -4 is to account for senc values starting at 0x10 */
3256 lpcr = senc << (LPCR_VRMASD_SH - 4);
3257 kvmppc_update_lpcr(kvm, lpcr, LPCR_VRMASD);
3258 } else {
3259 kvmppc_setup_partition_table(kvm);
3260 }
a0144e2a 3261
31037eca 3262 /* Order updates to kvm->arch.lpcr etc. vs. hpte_setup_done */
c77162de 3263 smp_wmb();
31037eca 3264 kvm->arch.hpte_setup_done = 1;
c77162de 3265 err = 0;
2c9097e4
PM		 3266 out_srcu:
3267 srcu_read_unlock(&kvm->srcu, srcu_idx);
c77162de
PM		 3268 out:
3269 mutex_unlock(&kvm->lock);
3270 return err;
b2b2f165 3271
c77162de
PM		 3272 up_out:
3273 up_read(&current->mm->mmap_sem);
505d6421 3274 goto out_srcu;
de56a948
PM		 3275}
3276
79b6c247
SW		 3277#ifdef CONFIG_KVM_XICS
3278/*
3279 * Allocate a per-core structure for managing state about which cores are
3280 * running in the host versus the guest and for exchanging data between
3281 * real mode KVM and CPU running in the host.
3282 * This is only done for the first VM.
3283 * The allocated structure stays even if all VMs have stopped.
3284 * It is only freed when the kvm-hv module is unloaded.
3285 * It's OK for this routine to fail, we just don't support host
3286 * core operations like redirecting H_IPI wakeups.
3287 */
3288void kvmppc_alloc_host_rm_ops(void)
3289{
3290 struct kvmppc_host_rm_ops *ops;
3291 unsigned long l_ops;
3292 int cpu, core;
3293 int size;
3294
3295 /* Not the first time here ? */
3296 if (kvmppc_host_rm_ops_hv != NULL)
3297 return;
3298
3299 ops = kzalloc(sizeof(struct kvmppc_host_rm_ops), GFP_KERNEL);
3300 if (!ops)
3301 return;
3302
3303 size = cpu_nr_cores() * sizeof(struct kvmppc_host_rm_core);
3304 ops->rm_core = kzalloc(size, GFP_KERNEL);
3305
3306 if (!ops->rm_core) {
3307 kfree(ops);
3308 return;
3309 }
3310
6f3bb809
SW		 3311 get_online_cpus();
3312
79b6c247
SW		 3313 for (cpu = 0; cpu < nr_cpu_ids; cpu += threads_per_core) {
3314 if (!cpu_online(cpu))
3315 continue;
3316
3317 core = cpu >> threads_shift;
3318 ops->rm_core[core].rm_state.in_host = 1;
3319 }
3320
0c2a6606
SW		 3321 ops->vcpu_kick = kvmppc_fast_vcpu_kick_hv;
3322
79b6c247
SW		 3323 /*
3324 * Make the contents of the kvmppc_host_rm_ops structure visible
3325 * to other CPUs before we assign it to the global variable.
3326 * Do an atomic assignment (no locks used here), but if someone
3327 * beats us to it, just free our copy and return.
3328 */
3329 smp_wmb();
3330 l_ops = (unsigned long) ops;
3331
3332 if (cmpxchg64((unsigned long *)&kvmppc_host_rm_ops_hv, 0, l_ops)) {
6f3bb809 3333 put_online_cpus();
79b6c247
SW		 3334 kfree(ops->rm_core);
3335 kfree(ops);
6f3bb809 3336 return;
79b6c247 3337 }
6f3bb809 3338
3f7cd919
AMG		 3339 cpuhp_setup_state_nocalls(CPUHP_KVM_PPC_BOOK3S_PREPARE,
3340 "ppc/kvm_book3s:prepare",
3341 kvmppc_set_host_core,
3342 kvmppc_clear_host_core);
6f3bb809 3343 put_online_cpus();
79b6c247
SW		 3344}
3345
3346void kvmppc_free_host_rm_ops(void)
3347{
3348 if (kvmppc_host_rm_ops_hv) {
3f7cd919 3349 cpuhp_remove_state_nocalls(CPUHP_KVM_PPC_BOOK3S_PREPARE);
79b6c247
SW		 3350 kfree(kvmppc_host_rm_ops_hv->rm_core);
3351 kfree(kvmppc_host_rm_ops_hv);
3352 kvmppc_host_rm_ops_hv = NULL;
3353 }
3354}
3355#endif
3356
3a167bea 3357static int kvmppc_core_init_vm_hv(struct kvm *kvm)
de56a948 3358{
32fad281 3359 unsigned long lpcr, lpid;
e23a808b 3360 char buf[32];
8cf4ecc0 3361 int ret;
de56a948 3362
32fad281
PM		 3363 /* Allocate the guest's logical partition ID */
3364
3365 lpid = kvmppc_alloc_lpid();
5d226ae5 3366 if ((long)lpid < 0)
32fad281
PM		 3367 return -ENOMEM;
3368 kvm->arch.lpid = lpid;
de56a948 3369
79b6c247
SW		 3370 kvmppc_alloc_host_rm_ops();
3371
1b400ba0
PM		 3372 /*
3373 * Since we don't flush the TLB when tearing down a VM,
3374 * and this lpid might have previously been used,
3375 * make sure we flush on each core before running the new VM.
7c5b06ca
PM		 3376 * On POWER9, the tlbie in mmu_partition_table_set_entry()
3377 * does this flush for us.
1b400ba0 3378 */
7c5b06ca
PM		 3379 if (!cpu_has_feature(CPU_FTR_ARCH_300))
3380 cpumask_setall(&kvm->arch.need_tlb_flush);
1b400ba0 3381
699a0ea0
PM		 3382 /* Start out with the default set of hcalls enabled */
3383 memcpy(kvm->arch.enabled_hcalls, default_enabled_hcalls,
3384 sizeof(kvm->arch.enabled_hcalls));
3385
7a84084c
PM		 3386 if (!cpu_has_feature(CPU_FTR_ARCH_300))
3387 kvm->arch.host_sdr1 = mfspr(SPRN_SDR1);
aa04b4cc 3388
c17b98cf
PM		 3389 /* Init LPCR for virtual RMA mode */
3390 kvm->arch.host_lpid = mfspr(SPRN_LPID);
3391 kvm->arch.host_lpcr = lpcr = mfspr(SPRN_LPCR);
3392 lpcr &= LPCR_PECE | LPCR_LPES;
3393 lpcr |= (4UL << LPCR_DPFD_SH) | LPCR_HDICE |
3394 LPCR_VPM0 | LPCR_VPM1;
3395 kvm->arch.vrma_slb_v = SLB_VSID_B_1T |
3396 (VRMA_VSID << SLB_VSID_SHIFT_1T);
3397 /* On POWER8 turn on online bit to enable PURR/SPURR */
3398 if (cpu_has_feature(CPU_FTR_ARCH_207S))
3399 lpcr |= LPCR_ONL;
84f7139c
PM		 3400 /*
3401 * On POWER9, VPM0 bit is reserved (VPM0=1 behaviour is assumed)
3402 * Set HVICE bit to enable hypervisor virtualization interrupts.
3403 */
3404 if (cpu_has_feature(CPU_FTR_ARCH_300)) {
7a84084c 3405 lpcr &= ~LPCR_VPM0;
84f7139c
PM		 3406 lpcr |= LPCR_HVICE;
3407 }
3408
8cf4ecc0
PM		 3409 /*
3410 * For now, if the host uses radix, the guest must be radix.
3411 */
3412 if (radix_enabled()) {
3413 kvm->arch.radix = 1;
3414 lpcr &= ~LPCR_VPM1;
3415 lpcr |= LPCR_UPRT | LPCR_GTSE | LPCR_HR;
3416 ret = kvmppc_init_vm_radix(kvm);
3417 if (ret) {
3418 kvmppc_free_lpid(kvm->arch.lpid);
3419 return ret;
3420 }
3421 kvmppc_setup_partition_table(kvm);
3422 }
3423
9e368f29 3424 kvm->arch.lpcr = lpcr;
aa04b4cc 3425
5e985969
DG		 3426 /* Initialization for future HPT resizes */
3427 kvm->arch.resize_hpt = NULL;
3428
7c5b06ca
PM		 3429 /*
3430 * Work out how many sets the TLB has, for the use of
3431 * the TLB invalidation loop in book3s_hv_rmhandlers.S.
3432 */
8cf4ecc0
PM		 3433 if (kvm_is_radix(kvm))
3434 kvm->arch.tlb_sets = POWER9_TLB_SETS_RADIX; /* 128 */
3435 else if (cpu_has_feature(CPU_FTR_ARCH_300))
7c5b06ca
PM		 3436 kvm->arch.tlb_sets = POWER9_TLB_SETS_HASH; /* 256 */
3437 else if (cpu_has_feature(CPU_FTR_ARCH_207S))
3438 kvm->arch.tlb_sets = POWER8_TLB_SETS; /* 512 */
3439 else
3440 kvm->arch.tlb_sets = POWER7_TLB_SETS; /* 128 */
3441
512691d4 3442 /*
441c19c8
ME		 3443 * Track that we now have a HV mode VM active. This blocks secondary
3444 * CPU threads from coming online.
8cf4ecc0
PM		 3445 * On POWER9, we only need to do this for HPT guests on a radix
3446 * host, which is not yet supported.
512691d4 3447 */
8cf4ecc0
PM		 3448 if (!cpu_has_feature(CPU_FTR_ARCH_300))
3449 kvm_hv_vm_activated();
512691d4 3450
e23a808b
PM		 3451 /*
3452 * Create a debugfs directory for the VM
3453 */
3454 snprintf(buf, sizeof(buf), "vm%d", current->pid);
3455 kvm->arch.debugfs_dir = debugfs_create_dir(buf, kvm_debugfs_dir);
3456 if (!IS_ERR_OR_NULL(kvm->arch.debugfs_dir))
3457 kvmppc_mmu_debugfs_init(kvm);
3458
54738c09 3459 return 0;
de56a948
PM		 3460}
3461
f1378b1c
PM		 3462static void kvmppc_free_vcores(struct kvm *kvm)
3463{
3464 long int i;
3465
23316316 3466 for (i = 0; i < KVM_MAX_VCORES; ++i)
f1378b1c
PM		 3467 kfree(kvm->arch.vcores[i]);
3468 kvm->arch.online_vcores = 0;
3469}
3470
3a167bea 3471static void kvmppc_core_destroy_vm_hv(struct kvm *kvm)
de56a948 3472{
e23a808b
PM		 3473 debugfs_remove_recursive(kvm->arch.debugfs_dir);
3474
8cf4ecc0
PM		 3475 if (!cpu_has_feature(CPU_FTR_ARCH_300))
3476 kvm_hv_vm_deactivated();
512691d4 3477
f1378b1c 3478 kvmppc_free_vcores(kvm);
aa04b4cc 3479
8cf4ecc0
PM		 3480 kvmppc_free_lpid(kvm->arch.lpid);
3481
5a319350
PM		 3482 if (kvm_is_radix(kvm))
3483 kvmppc_free_radix(kvm);
3484 else
aae0777f 3485 kvmppc_free_hpt(&kvm->arch.hpt);
c57875f5
SW		 3486
3487 kvmppc_free_pimap(kvm);
de56a948
PM		 3488}
3489
3a167bea
AK		 3490/* We don't need to emulate any privileged instructions or dcbz */
3491static int kvmppc_core_emulate_op_hv(struct kvm_run *run, struct kvm_vcpu *vcpu,
3492 unsigned int inst, int *advance)
de56a948 3493{
3a167bea 3494 return EMULATE_FAIL;
de56a948
PM		 3495}
3496
3a167bea
AK		 3497static int kvmppc_core_emulate_mtspr_hv(struct kvm_vcpu *vcpu, int sprn,
3498 ulong spr_val)
de56a948
PM		 3499{
3500 return EMULATE_FAIL;
3501}
3502
3a167bea
AK		 3503static int kvmppc_core_emulate_mfspr_hv(struct kvm_vcpu *vcpu, int sprn,
3504 ulong *spr_val)
de56a948
PM		 3505{
3506 return EMULATE_FAIL;
3507}
3508
3a167bea 3509static int kvmppc_core_check_processor_compat_hv(void)
de56a948 3510{
c17b98cf
PM		 3511 if (!cpu_has_feature(CPU_FTR_HVMODE) ||
3512 !cpu_has_feature(CPU_FTR_ARCH_206))
3a167bea 3513 return -EIO;
50de596d 3514
3a167bea 3515 return 0;
de56a948
PM		 3516}
3517
8daaafc8
SW		 3518#ifdef CONFIG_KVM_XICS
3519
3520void kvmppc_free_pimap(struct kvm *kvm)
3521{
3522 kfree(kvm->arch.pimap);
3523}
3524
c57875f5 3525static struct kvmppc_passthru_irqmap *kvmppc_alloc_pimap(void)
8daaafc8
SW		 3526{
3527 return kzalloc(sizeof(struct kvmppc_passthru_irqmap), GFP_KERNEL);
3528}
c57875f5
SW		 3529
3530static int kvmppc_set_passthru_irq(struct kvm *kvm, int host_irq, int guest_gsi)
3531{
3532 struct irq_desc *desc;
3533 struct kvmppc_irq_map *irq_map;
3534 struct kvmppc_passthru_irqmap *pimap;
3535 struct irq_chip *chip;
3536 int i;
3537
644abbb2
SW		 3538 if (!kvm_irq_bypass)
3539 return 1;
3540
c57875f5
SW		 3541 desc = irq_to_desc(host_irq);
3542 if (!desc)
3543 return -EIO;
3544
3545 mutex_lock(&kvm->lock);
3546
3547 pimap = kvm->arch.pimap;
3548 if (pimap == NULL) {
3549 /* First call, allocate structure to hold IRQ map */
3550 pimap = kvmppc_alloc_pimap();
3551 if (pimap == NULL) {
3552 mutex_unlock(&kvm->lock);
3553 return -ENOMEM;
3554 }
3555 kvm->arch.pimap = pimap;
3556 }
3557
3558 /*
3559 * For now, we only support interrupts for which the EOI operation
3560 * is an OPAL call followed by a write to XIRR, since that's
3561 * what our real-mode EOI code does.
3562 */
3563 chip = irq_data_get_irq_chip(&desc->irq_data);
3564 if (!chip || !is_pnv_opal_msi(chip)) {
3565 pr_warn("kvmppc_set_passthru_irq_hv: Could not assign IRQ map for (%d,%d)\n",
3566 host_irq, guest_gsi);
3567 mutex_unlock(&kvm->lock);
3568 return -ENOENT;
3569 }
3570
3571 /*
3572 * See if we already have an entry for this guest IRQ number.
3573 * If it's mapped to a hardware IRQ number, that's an error,
3574 * otherwise re-use this entry.
3575 */
3576 for (i = 0; i < pimap->n_mapped; i++) {
3577 if (guest_gsi == pimap->mapped[i].v_hwirq) {
3578 if (pimap->mapped[i].r_hwirq) {
3579 mutex_unlock(&kvm->lock);
3580 return -EINVAL;
3581 }
3582 break;
3583 }
3584 }
3585
3586 if (i == KVMPPC_PIRQ_MAPPED) {
3587 mutex_unlock(&kvm->lock);
3588 return -EAGAIN; /* table is full */
3589 }
3590
3591 irq_map = &pimap->mapped[i];
3592
3593 irq_map->v_hwirq = guest_gsi;
c57875f5
SW		 3594 irq_map->desc = desc;
3595
e3c13e56
SW		 3596 /*
3597 * Order the above two stores before the next to serialize with
3598 * the KVM real mode handler.
3599 */
3600 smp_wmb();
3601 irq_map->r_hwirq = desc->irq_data.hwirq;
3602
c57875f5
SW		 3603 if (i == pimap->n_mapped)
3604 pimap->n_mapped++;
3605
5d375199
PM		 3606 kvmppc_xics_set_mapped(kvm, guest_gsi, desc->irq_data.hwirq);
3607
c57875f5
SW		 3608 mutex_unlock(&kvm->lock);
3609
3610 return 0;
3611}
3612
3613static int kvmppc_clr_passthru_irq(struct kvm *kvm, int host_irq, int guest_gsi)
3614{
3615 struct irq_desc *desc;
3616 struct kvmppc_passthru_irqmap *pimap;
3617 int i;
3618
644abbb2
SW		 3619 if (!kvm_irq_bypass)
3620 return 0;
3621
c57875f5
SW		 3622 desc = irq_to_desc(host_irq);
3623 if (!desc)
3624 return -EIO;
3625
3626 mutex_lock(&kvm->lock);
3627
3628 if (kvm->arch.pimap == NULL) {
3629 mutex_unlock(&kvm->lock);
3630 return 0;
3631 }
3632 pimap = kvm->arch.pimap;
3633
3634 for (i = 0; i < pimap->n_mapped; i++) {
3635 if (guest_gsi == pimap->mapped[i].v_hwirq)
3636 break;
3637 }
3638
3639 if (i == pimap->n_mapped) {
3640 mutex_unlock(&kvm->lock);
3641 return -ENODEV;
3642 }
3643
5d375199
PM		 3644 kvmppc_xics_clr_mapped(kvm, guest_gsi, pimap->mapped[i].r_hwirq);
3645
c57875f5
SW		 3646 /* invalidate the entry */
3647 pimap->mapped[i].r_hwirq = 0;
3648
3649 /*
3650 * We don't free this structure even when the count goes to
3651 * zero. The structure is freed when we destroy the VM.
3652 */
3653
3654 mutex_unlock(&kvm->lock);
3655 return 0;
3656}
3657
3658static int kvmppc_irq_bypass_add_producer_hv(struct irq_bypass_consumer *cons,
3659 struct irq_bypass_producer *prod)
3660{
3661 int ret = 0;
3662 struct kvm_kernel_irqfd *irqfd =
3663 container_of(cons, struct kvm_kernel_irqfd, consumer);
3664
3665 irqfd->producer = prod;
3666
3667 ret = kvmppc_set_passthru_irq(irqfd->kvm, prod->irq, irqfd->gsi);
3668 if (ret)
3669 pr_info("kvmppc_set_passthru_irq (irq %d, gsi %d) fails: %d\n",
3670 prod->irq, irqfd->gsi, ret);
3671
3672 return ret;
3673}
3674
3675static void kvmppc_irq_bypass_del_producer_hv(struct irq_bypass_consumer *cons,
3676 struct irq_bypass_producer *prod)
3677{
3678 int ret;
3679 struct kvm_kernel_irqfd *irqfd =
3680 container_of(cons, struct kvm_kernel_irqfd, consumer);
3681
3682 irqfd->producer = NULL;
3683
3684 /*
3685 * When producer of consumer is unregistered, we change back to
3686 * default external interrupt handling mode - KVM real mode
3687 * will switch back to host.
3688 */
3689 ret = kvmppc_clr_passthru_irq(irqfd->kvm, prod->irq, irqfd->gsi);
3690 if (ret)
3691 pr_warn("kvmppc_clr_passthru_irq (irq %d, gsi %d) fails: %d\n",
3692 prod->irq, irqfd->gsi, ret);
3693}
8daaafc8
SW		 3694#endif
3695
3a167bea
AK		 3696static long kvm_arch_vm_ioctl_hv(struct file *filp,
3697 unsigned int ioctl, unsigned long arg)
3698{
3699 struct kvm *kvm __maybe_unused = filp->private_data;
3700 void __user *argp = (void __user *)arg;
3701 long r;
3702
3703 switch (ioctl) {
3704
3a167bea
AK		 3705 case KVM_PPC_ALLOCATE_HTAB: {
3706 u32 htab_order;
3707
3708 r = -EFAULT;
3709 if (get_user(htab_order, (u32 __user *)argp))
3710 break;
f98a8bf9 3711 r = kvmppc_alloc_reset_hpt(kvm, htab_order);
3a167bea
AK		 3712 if (r)
3713 break;
3a167bea
AK		 3714 r = 0;
3715 break;
3716 }
3717
3718 case KVM_PPC_GET_HTAB_FD: {
3719 struct kvm_get_htab_fd ghf;
3720
3721 r = -EFAULT;
3722 if (copy_from_user(&ghf, argp, sizeof(ghf)))
3723 break;
3724 r = kvm_vm_ioctl_get_htab_fd(kvm, &ghf);
3725 break;
3726 }
3727
5e985969
DG		 3728 case KVM_PPC_RESIZE_HPT_PREPARE: {
3729 struct kvm_ppc_resize_hpt rhpt;
3730
3731 r = -EFAULT;
3732 if (copy_from_user(&rhpt, argp, sizeof(rhpt)))
3733 break;
3734
3735 r = kvm_vm_ioctl_resize_hpt_prepare(kvm, &rhpt);
3736 break;
3737 }
3738
3739 case KVM_PPC_RESIZE_HPT_COMMIT: {
3740 struct kvm_ppc_resize_hpt rhpt;
3741
3742 r = -EFAULT;
3743 if (copy_from_user(&rhpt, argp, sizeof(rhpt)))
3744 break;
3745
3746 r = kvm_vm_ioctl_resize_hpt_commit(kvm, &rhpt);
3747 break;
3748 }
3749
3a167bea
AK		 3750 default:
3751 r = -ENOTTY;
3752 }
3753
3754 return r;
3755}
3756
699a0ea0
PM		 3757/*
3758 * List of hcall numbers to enable by default.
3759 * For compatibility with old userspace, we enable by default
3760 * all hcalls that were implemented before the hcall-enabling
3761 * facility was added. Note this list should not include H_RTAS.
3762 */
3763static unsigned int default_hcall_list[] = {
3764 H_REMOVE,
3765 H_ENTER,
3766 H_READ,
3767 H_PROTECT,
3768 H_BULK_REMOVE,
3769 H_GET_TCE,
3770 H_PUT_TCE,
3771 H_SET_DABR,
3772 H_SET_XDABR,
3773 H_CEDE,
3774 H_PROD,
3775 H_CONFER,
3776 H_REGISTER_VPA,
3777#ifdef CONFIG_KVM_XICS
3778 H_EOI,
3779 H_CPPR,
3780 H_IPI,
3781 H_IPOLL,
3782 H_XIRR,
3783 H_XIRR_X,
3784#endif
3785 0
3786};
3787
3788static void init_default_hcalls(void)
3789{
3790 int i;
ae2113a4 3791 unsigned int hcall;
699a0ea0 3792
ae2113a4
PM		 3793 for (i = 0; default_hcall_list[i]; ++i) {
3794 hcall = default_hcall_list[i];
3795 WARN_ON(!kvmppc_hcall_impl_hv(hcall));
3796 __set_bit(hcall / 4, default_enabled_hcalls);
3797 }
699a0ea0
PM		 3798}
3799
c9270132
PM		 3800static int kvmhv_configure_mmu(struct kvm *kvm, struct kvm_ppc_mmuv3_cfg *cfg)
3801{
468808bd 3802 unsigned long lpcr;
8cf4ecc0 3803 int radix;
468808bd
PM		 3804
3805 /* If not on a POWER9, reject it */
3806 if (!cpu_has_feature(CPU_FTR_ARCH_300))
3807 return -ENODEV;
3808
3809 /* If any unknown flags set, reject it */
3810 if (cfg->flags & ~(KVM_PPC_MMUV3_RADIX | KVM_PPC_MMUV3_GTSE))
3811 return -EINVAL;
3812
8cf4ecc0
PM		 3813 /* We can't change a guest to/from radix yet */
3814 radix = !!(cfg->flags & KVM_PPC_MMUV3_RADIX);
3815 if (radix != kvm_is_radix(kvm))
468808bd
PM		 3816 return -EINVAL;
3817
3818 /* GR (guest radix) bit in process_table field must match */
8cf4ecc0 3819 if (!!(cfg->process_table & PATB_GR) != radix)
468808bd
PM		 3820 return -EINVAL;
3821
3822 /* Process table size field must be reasonable, i.e. <= 24 */
3823 if ((cfg->process_table & PRTS_MASK) > 24)
3824 return -EINVAL;
3825
3826 kvm->arch.process_table = cfg->process_table;
3827 kvmppc_setup_partition_table(kvm);
3828
3829 lpcr = (cfg->flags & KVM_PPC_MMUV3_GTSE) ? LPCR_GTSE : 0;
3830 kvmppc_update_lpcr(kvm, lpcr, LPCR_GTSE);
3831
3832 return 0;
c9270132
PM		 3833}
3834
cbbc58d4 3835static struct kvmppc_ops kvm_ops_hv = {
3a167bea
AK		 3836 .get_sregs = kvm_arch_vcpu_ioctl_get_sregs_hv,
3837 .set_sregs = kvm_arch_vcpu_ioctl_set_sregs_hv,
3838 .get_one_reg = kvmppc_get_one_reg_hv,
3839 .set_one_reg = kvmppc_set_one_reg_hv,
3840 .vcpu_load = kvmppc_core_vcpu_load_hv,
3841 .vcpu_put = kvmppc_core_vcpu_put_hv,
3842 .set_msr = kvmppc_set_msr_hv,
3843 .vcpu_run = kvmppc_vcpu_run_hv,
3844 .vcpu_create = kvmppc_core_vcpu_create_hv,
3845 .vcpu_free = kvmppc_core_vcpu_free_hv,
3846 .check_requests = kvmppc_core_check_requests_hv,
3847 .get_dirty_log = kvm_vm_ioctl_get_dirty_log_hv,
3848 .flush_memslot = kvmppc_core_flush_memslot_hv,
3849 .prepare_memory_region = kvmppc_core_prepare_memory_region_hv,
3850 .commit_memory_region = kvmppc_core_commit_memory_region_hv,
3851 .unmap_hva = kvm_unmap_hva_hv,
3852 .unmap_hva_range = kvm_unmap_hva_range_hv,
3853 .age_hva = kvm_age_hva_hv,
3854 .test_age_hva = kvm_test_age_hva_hv,
3855 .set_spte_hva = kvm_set_spte_hva_hv,
3856 .mmu_destroy = kvmppc_mmu_destroy_hv,
3857 .free_memslot = kvmppc_core_free_memslot_hv,
3858 .create_memslot = kvmppc_core_create_memslot_hv,
3859 .init_vm = kvmppc_core_init_vm_hv,
3860 .destroy_vm = kvmppc_core_destroy_vm_hv,
3a167bea
AK		 3861 .get_smmu_info = kvm_vm_ioctl_get_smmu_info_hv,
3862 .emulate_op = kvmppc_core_emulate_op_hv,
3863 .emulate_mtspr = kvmppc_core_emulate_mtspr_hv,
3864 .emulate_mfspr = kvmppc_core_emulate_mfspr_hv,
3865 .fast_vcpu_kick = kvmppc_fast_vcpu_kick_hv,
3866 .arch_vm_ioctl = kvm_arch_vm_ioctl_hv,
ae2113a4 3867 .hcall_implemented = kvmppc_hcall_impl_hv,
c57875f5
SW		 3868#ifdef CONFIG_KVM_XICS
3869 .irq_bypass_add_producer = kvmppc_irq_bypass_add_producer_hv,
3870 .irq_bypass_del_producer = kvmppc_irq_bypass_del_producer_hv,
3871#endif
c9270132
PM		 3872 .configure_mmu = kvmhv_configure_mmu,
3873 .get_rmmu_info = kvmhv_get_rmmu_info,
3a167bea
AK		 3874};
3875
fd7bacbc
MS		 3876static int kvm_init_subcore_bitmap(void)
3877{
3878 int i, j;
3879 int nr_cores = cpu_nr_cores();
3880 struct sibling_subcore_state *sibling_subcore_state;
3881
3882 for (i = 0; i < nr_cores; i++) {
3883 int first_cpu = i * threads_per_core;
3884 int node = cpu_to_node(first_cpu);
3885
3886 /* Ignore if it is already allocated. */
3887 if (paca[first_cpu].sibling_subcore_state)
3888 continue;
3889
3890 sibling_subcore_state =
3891 kmalloc_node(sizeof(struct sibling_subcore_state),
3892 GFP_KERNEL, node);
3893 if (!sibling_subcore_state)
3894 return -ENOMEM;
3895
3896 memset(sibling_subcore_state, 0,
3897 sizeof(struct sibling_subcore_state));
3898
3899 for (j = 0; j < threads_per_core; j++) {
3900 int cpu = first_cpu + j;
3901
3902 paca[cpu].sibling_subcore_state = sibling_subcore_state;
3903 }
3904 }
3905 return 0;
3906}
3907
5a319350
PM		 3908static int kvmppc_radix_possible(void)
3909{
3910 return cpu_has_feature(CPU_FTR_ARCH_300) && radix_enabled();
3911}
3912
3a167bea 3913static int kvmppc_book3s_init_hv(void)
de56a948
PM		 3914{
3915 int r;
cbbc58d4
AK		 3916 /*
3917 * FIXME!! Do we need to check on all cpus ?
3918 */
3919 r = kvmppc_core_check_processor_compat_hv();
3920 if (r < 0)
739e2425 3921 return -ENODEV;
de56a948 3922
fd7bacbc
MS		 3923 r = kvm_init_subcore_bitmap();
3924 if (r)
3925 return r;
3926
f725758b
PM		 3927 /*
3928 * We need a way of accessing the XICS interrupt controller,
3929 * either directly, via paca[cpu].kvm_hstate.xics_phys, or
3930 * indirectly, via OPAL.
3931 */
3932#ifdef CONFIG_SMP
3933 if (!get_paca()->kvm_hstate.xics_phys) {
3934 struct device_node *np;
3935
3936 np = of_find_compatible_node(NULL, NULL, "ibm,opal-intc");
3937 if (!np) {
3938 pr_err("KVM-HV: Cannot determine method for accessing XICS\n");
3939 return -ENODEV;
3940 }
3941 }
3942#endif
3943
cbbc58d4
AK		 3944 kvm_ops_hv.owner = THIS_MODULE;
3945 kvmppc_hv_ops = &kvm_ops_hv;
de56a948 3946
699a0ea0
PM		 3947 init_default_hcalls();
3948
ec257165
PM		 3949 init_vcore_lists();
3950
cbbc58d4 3951 r = kvmppc_mmu_hv_init();
5a319350
PM		 3952 if (r)
3953 return r;
3954
3955 if (kvmppc_radix_possible())
3956 r = kvmppc_radix_init();
de56a948
PM		 3957 return r;
3958}
3959
3a167bea 3960static void kvmppc_book3s_exit_hv(void)
de56a948 3961{
79b6c247 3962 kvmppc_free_host_rm_ops();
5a319350
PM		 3963 if (kvmppc_radix_possible())
3964 kvmppc_radix_exit();
cbbc58d4 3965 kvmppc_hv_ops = NULL;
de56a948
PM		 3966}
3967
3a167bea
AK		 3968module_init(kvmppc_book3s_init_hv);
3969module_exit(kvmppc_book3s_exit_hv);
2ba9f0d8 3970MODULE_LICENSE("GPL");
398a76c6
AG		 3971MODULE_ALIAS_MISCDEV(KVM_MINOR);
3972MODULE_ALIAS("devname:kvm");
7c5b06ca 3973
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