2 * Copyright 2011 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com>
3 * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved.
6 * Paul Mackerras <paulus@au1.ibm.com>
7 * Alexander Graf <agraf@suse.de>
8 * Kevin Wolf <mail@kevin-wolf.de>
10 * Description: KVM functions specific to running on Book 3S
11 * processors in hypervisor mode (specifically POWER7 and later).
13 * This file is derived from arch/powerpc/kvm/book3s.c,
14 * by Alexander Graf <agraf@suse.de>.
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.
21 #include <linux/kvm_host.h>
22 #include <linux/err.h>
23 #include <linux/slab.h>
24 #include <linux/preempt.h>
25 #include <linux/sched.h>
26 #include <linux/delay.h>
27 #include <linux/export.h>
29 #include <linux/anon_inodes.h>
30 #include <linux/cpu.h>
31 #include <linux/cpumask.h>
32 #include <linux/spinlock.h>
33 #include <linux/page-flags.h>
34 #include <linux/srcu.h>
35 #include <linux/miscdevice.h>
36 #include <linux/debugfs.h>
39 #include <asm/cputable.h>
40 #include <asm/cacheflush.h>
41 #include <asm/tlbflush.h>
42 #include <asm/uaccess.h>
44 #include <asm/kvm_ppc.h>
45 #include <asm/kvm_book3s.h>
46 #include <asm/mmu_context.h>
47 #include <asm/lppaca.h>
48 #include <asm/processor.h>
49 #include <asm/cputhreads.h>
51 #include <asm/hvcall.h>
52 #include <asm/switch_to.h>
54 #include <asm/dbell.h>
56 #include <asm/pnv-pci.h>
57 #include <linux/gfp.h>
58 #include <linux/vmalloc.h>
59 #include <linux/highmem.h>
60 #include <linux/hugetlb.h>
61 #include <linux/kvm_irqfd.h>
62 #include <linux/irqbypass.h>
63 #include <linux/module.h>
64 #include <linux/compiler.h>
68 #define CREATE_TRACE_POINTS
71 /* #define EXIT_DEBUG */
72 /* #define EXIT_DEBUG_SIMPLE */
73 /* #define EXIT_DEBUG_INT */
75 /* Used to indicate that a guest page fault needs to be handled */
76 #define RESUME_PAGE_FAULT (RESUME_GUEST | RESUME_FLAG_ARCH1)
77 /* Used to indicate that a guest passthrough interrupt needs to be handled */
78 #define RESUME_PASSTHROUGH (RESUME_GUEST | RESUME_FLAG_ARCH2)
80 /* Used as a "null" value for timebase values */
81 #define TB_NIL (~(u64)0)
83 static DECLARE_BITMAP(default_enabled_hcalls, MAX_HCALL_OPCODE/4 + 1);
85 static int dynamic_mt_modes = 6;
86 module_param(dynamic_mt_modes, int, S_IRUGO | S_IWUSR);
87 MODULE_PARM_DESC(dynamic_mt_modes, "Set of allowed dynamic micro-threading modes: 0 (= none), 2, 4, or 6 (= 2 or 4)");
88 static int target_smt_mode;
89 module_param(target_smt_mode, int, S_IRUGO | S_IWUSR);
90 MODULE_PARM_DESC(target_smt_mode, "Target threads per core (0 = max)");
92 #ifdef CONFIG_KVM_XICS
93 static struct kernel_param_ops module_param_ops = {
98 module_param_cb(kvm_irq_bypass, &module_param_ops, &kvm_irq_bypass,
100 MODULE_PARM_DESC(kvm_irq_bypass, "Bypass passthrough interrupt optimization");
102 module_param_cb(h_ipi_redirect, &module_param_ops, &h_ipi_redirect,
104 MODULE_PARM_DESC(h_ipi_redirect, "Redirect H_IPI wakeup to a free host core");
107 /* Maximum halt poll interval defaults to KVM_HALT_POLL_NS_DEFAULT */
108 static unsigned int halt_poll_max_ns = KVM_HALT_POLL_NS_DEFAULT;
109 module_param(halt_poll_max_ns, uint, S_IRUGO | S_IWUSR);
110 MODULE_PARM_DESC(halt_poll_max_ns, "Maximum halt poll time in ns");
112 /* Factor by which the vcore halt poll interval is grown, default is to double
114 static unsigned int halt_poll_ns_grow = 2;
115 module_param(halt_poll_ns_grow, int, S_IRUGO);
116 MODULE_PARM_DESC(halt_poll_ns_grow, "Factor halt poll time is grown by");
118 /* Factor by which the vcore halt poll interval is shrunk, default is to reset
120 static unsigned int halt_poll_ns_shrink;
121 module_param(halt_poll_ns_shrink, int, S_IRUGO);
122 MODULE_PARM_DESC(halt_poll_ns_shrink, "Factor halt poll time is shrunk by");
124 static void kvmppc_end_cede(struct kvm_vcpu *vcpu);
125 static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu);
127 static inline struct kvm_vcpu *next_runnable_thread(struct kvmppc_vcore *vc,
131 struct kvm_vcpu *vcpu;
133 while (++i < MAX_SMT_THREADS) {
134 vcpu = READ_ONCE(vc->runnable_threads[i]);
143 /* Used to traverse the list of runnable threads for a given vcore */
144 #define for_each_runnable_thread(i, vcpu, vc) \
145 for (i = -1; (vcpu = next_runnable_thread(vc, &i)); )
147 static bool kvmppc_ipi_thread(int cpu)
149 /* On POWER8 for IPIs to threads in the same core, use msgsnd */
150 if (cpu_has_feature(CPU_FTR_ARCH_207S)) {
152 if (cpu_first_thread_sibling(cpu) ==
153 cpu_first_thread_sibling(smp_processor_id())) {
154 unsigned long msg = PPC_DBELL_TYPE(PPC_DBELL_SERVER);
155 msg |= cpu_thread_in_core(cpu);
157 __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
164 #if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP)
165 if (cpu >= 0 && cpu < nr_cpu_ids && paca[cpu].kvm_hstate.xics_phys) {
174 static void kvmppc_fast_vcpu_kick_hv(struct kvm_vcpu *vcpu)
177 struct swait_queue_head *wqp;
179 wqp = kvm_arch_vcpu_wq(vcpu);
180 if (swait_active(wqp)) {
182 ++vcpu->stat.halt_wakeup;
185 if (kvmppc_ipi_thread(vcpu->arch.thread_cpu))
188 /* CPU points to the first thread of the core */
190 if (cpu >= 0 && cpu < nr_cpu_ids && cpu_online(cpu))
191 smp_send_reschedule(cpu);
195 * We use the vcpu_load/put functions to measure stolen time.
196 * Stolen time is counted as time when either the vcpu is able to
197 * run as part of a virtual core, but the task running the vcore
198 * is preempted or sleeping, or when the vcpu needs something done
199 * in the kernel by the task running the vcpu, but that task is
200 * preempted or sleeping. Those two things have to be counted
201 * separately, since one of the vcpu tasks will take on the job
202 * of running the core, and the other vcpu tasks in the vcore will
203 * sleep waiting for it to do that, but that sleep shouldn't count
206 * Hence we accumulate stolen time when the vcpu can run as part of
207 * a vcore using vc->stolen_tb, and the stolen time when the vcpu
208 * needs its task to do other things in the kernel (for example,
209 * service a page fault) in busy_stolen. We don't accumulate
210 * stolen time for a vcore when it is inactive, or for a vcpu
211 * when it is in state RUNNING or NOTREADY. NOTREADY is a bit of
212 * a misnomer; it means that the vcpu task is not executing in
213 * the KVM_VCPU_RUN ioctl, i.e. it is in userspace or elsewhere in
214 * the kernel. We don't have any way of dividing up that time
215 * between time that the vcpu is genuinely stopped, time that
216 * the task is actively working on behalf of the vcpu, and time
217 * that the task is preempted, so we don't count any of it as
220 * Updates to busy_stolen are protected by arch.tbacct_lock;
221 * updates to vc->stolen_tb are protected by the vcore->stoltb_lock
222 * lock. The stolen times are measured in units of timebase ticks.
223 * (Note that the != TB_NIL checks below are purely defensive;
224 * they should never fail.)
227 static void kvmppc_core_start_stolen(struct kvmppc_vcore *vc)
231 spin_lock_irqsave(&vc->stoltb_lock, flags);
232 vc->preempt_tb = mftb();
233 spin_unlock_irqrestore(&vc->stoltb_lock, flags);
236 static void kvmppc_core_end_stolen(struct kvmppc_vcore *vc)
240 spin_lock_irqsave(&vc->stoltb_lock, flags);
241 if (vc->preempt_tb != TB_NIL) {
242 vc->stolen_tb += mftb() - vc->preempt_tb;
243 vc->preempt_tb = TB_NIL;
245 spin_unlock_irqrestore(&vc->stoltb_lock, flags);
248 static void kvmppc_core_vcpu_load_hv(struct kvm_vcpu *vcpu, int cpu)
250 struct kvmppc_vcore *vc = vcpu->arch.vcore;
254 * We can test vc->runner without taking the vcore lock,
255 * because only this task ever sets vc->runner to this
256 * vcpu, and once it is set to this vcpu, only this task
257 * ever sets it to NULL.
259 if (vc->runner == vcpu && vc->vcore_state >= VCORE_SLEEPING)
260 kvmppc_core_end_stolen(vc);
262 spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags);
263 if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST &&
264 vcpu->arch.busy_preempt != TB_NIL) {
265 vcpu->arch.busy_stolen += mftb() - vcpu->arch.busy_preempt;
266 vcpu->arch.busy_preempt = TB_NIL;
268 spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags);
271 static void kvmppc_core_vcpu_put_hv(struct kvm_vcpu *vcpu)
273 struct kvmppc_vcore *vc = vcpu->arch.vcore;
276 if (vc->runner == vcpu && vc->vcore_state >= VCORE_SLEEPING)
277 kvmppc_core_start_stolen(vc);
279 spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags);
280 if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST)
281 vcpu->arch.busy_preempt = mftb();
282 spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags);
285 static void kvmppc_set_msr_hv(struct kvm_vcpu *vcpu, u64 msr)
288 * Check for illegal transactional state bit combination
289 * and if we find it, force the TS field to a safe state.
291 if ((msr & MSR_TS_MASK) == MSR_TS_MASK)
293 vcpu->arch.shregs.msr = msr;
294 kvmppc_end_cede(vcpu);
297 static void kvmppc_set_pvr_hv(struct kvm_vcpu *vcpu, u32 pvr)
299 vcpu->arch.pvr = pvr;
302 static int kvmppc_set_arch_compat(struct kvm_vcpu *vcpu, u32 arch_compat)
304 unsigned long pcr = 0;
305 struct kvmppc_vcore *vc = vcpu->arch.vcore;
308 switch (arch_compat) {
311 * If an arch bit is set in PCR, all the defined
312 * higher-order arch bits also have to be set.
314 pcr = PCR_ARCH_206 | PCR_ARCH_205;
326 if (!cpu_has_feature(CPU_FTR_ARCH_207S)) {
327 /* POWER7 can't emulate POWER8 */
328 if (!(pcr & PCR_ARCH_206))
330 pcr &= ~PCR_ARCH_206;
334 spin_lock(&vc->lock);
335 vc->arch_compat = arch_compat;
337 spin_unlock(&vc->lock);
342 static void kvmppc_dump_regs(struct kvm_vcpu *vcpu)
346 pr_err("vcpu %p (%d):\n", vcpu, vcpu->vcpu_id);
347 pr_err("pc = %.16lx msr = %.16llx trap = %x\n",
348 vcpu->arch.pc, vcpu->arch.shregs.msr, vcpu->arch.trap);
349 for (r = 0; r < 16; ++r)
350 pr_err("r%2d = %.16lx r%d = %.16lx\n",
351 r, kvmppc_get_gpr(vcpu, r),
352 r+16, kvmppc_get_gpr(vcpu, r+16));
353 pr_err("ctr = %.16lx lr = %.16lx\n",
354 vcpu->arch.ctr, vcpu->arch.lr);
355 pr_err("srr0 = %.16llx srr1 = %.16llx\n",
356 vcpu->arch.shregs.srr0, vcpu->arch.shregs.srr1);
357 pr_err("sprg0 = %.16llx sprg1 = %.16llx\n",
358 vcpu->arch.shregs.sprg0, vcpu->arch.shregs.sprg1);
359 pr_err("sprg2 = %.16llx sprg3 = %.16llx\n",
360 vcpu->arch.shregs.sprg2, vcpu->arch.shregs.sprg3);
361 pr_err("cr = %.8x xer = %.16lx dsisr = %.8x\n",
362 vcpu->arch.cr, vcpu->arch.xer, vcpu->arch.shregs.dsisr);
363 pr_err("dar = %.16llx\n", vcpu->arch.shregs.dar);
364 pr_err("fault dar = %.16lx dsisr = %.8x\n",
365 vcpu->arch.fault_dar, vcpu->arch.fault_dsisr);
366 pr_err("SLB (%d entries):\n", vcpu->arch.slb_max);
367 for (r = 0; r < vcpu->arch.slb_max; ++r)
368 pr_err(" ESID = %.16llx VSID = %.16llx\n",
369 vcpu->arch.slb[r].orige, vcpu->arch.slb[r].origv);
370 pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n",
371 vcpu->arch.vcore->lpcr, vcpu->kvm->arch.sdr1,
372 vcpu->arch.last_inst);
375 static struct kvm_vcpu *kvmppc_find_vcpu(struct kvm *kvm, int id)
377 return kvm_get_vcpu_by_id(kvm, id);
380 static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa)
382 vpa->__old_status |= LPPACA_OLD_SHARED_PROC;
383 vpa->yield_count = cpu_to_be32(1);
386 static int set_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *v,
387 unsigned long addr, unsigned long len)
389 /* check address is cacheline aligned */
390 if (addr & (L1_CACHE_BYTES - 1))
392 spin_lock(&vcpu->arch.vpa_update_lock);
393 if (v->next_gpa != addr || v->len != len) {
395 v->len = addr ? len : 0;
396 v->update_pending = 1;
398 spin_unlock(&vcpu->arch.vpa_update_lock);
402 /* Length for a per-processor buffer is passed in at offset 4 in the buffer */
411 static int vpa_is_registered(struct kvmppc_vpa *vpap)
413 if (vpap->update_pending)
414 return vpap->next_gpa != 0;
415 return vpap->pinned_addr != NULL;
418 static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu,
420 unsigned long vcpuid, unsigned long vpa)
422 struct kvm *kvm = vcpu->kvm;
423 unsigned long len, nb;
425 struct kvm_vcpu *tvcpu;
428 struct kvmppc_vpa *vpap;
430 tvcpu = kvmppc_find_vcpu(kvm, vcpuid);
434 subfunc = (flags >> H_VPA_FUNC_SHIFT) & H_VPA_FUNC_MASK;
435 if (subfunc == H_VPA_REG_VPA || subfunc == H_VPA_REG_DTL ||
436 subfunc == H_VPA_REG_SLB) {
437 /* Registering new area - address must be cache-line aligned */
438 if ((vpa & (L1_CACHE_BYTES - 1)) || !vpa)
441 /* convert logical addr to kernel addr and read length */
442 va = kvmppc_pin_guest_page(kvm, vpa, &nb);
445 if (subfunc == H_VPA_REG_VPA)
446 len = be16_to_cpu(((struct reg_vpa *)va)->length.hword);
448 len = be32_to_cpu(((struct reg_vpa *)va)->length.word);
449 kvmppc_unpin_guest_page(kvm, va, vpa, false);
452 if (len > nb || len < sizeof(struct reg_vpa))
461 spin_lock(&tvcpu->arch.vpa_update_lock);
464 case H_VPA_REG_VPA: /* register VPA */
465 if (len < sizeof(struct lppaca))
467 vpap = &tvcpu->arch.vpa;
471 case H_VPA_REG_DTL: /* register DTL */
472 if (len < sizeof(struct dtl_entry))
474 len -= len % sizeof(struct dtl_entry);
476 /* Check that they have previously registered a VPA */
478 if (!vpa_is_registered(&tvcpu->arch.vpa))
481 vpap = &tvcpu->arch.dtl;
485 case H_VPA_REG_SLB: /* register SLB shadow buffer */
486 /* Check that they have previously registered a VPA */
488 if (!vpa_is_registered(&tvcpu->arch.vpa))
491 vpap = &tvcpu->arch.slb_shadow;
495 case H_VPA_DEREG_VPA: /* deregister VPA */
496 /* Check they don't still have a DTL or SLB buf registered */
498 if (vpa_is_registered(&tvcpu->arch.dtl) ||
499 vpa_is_registered(&tvcpu->arch.slb_shadow))
502 vpap = &tvcpu->arch.vpa;
506 case H_VPA_DEREG_DTL: /* deregister DTL */
507 vpap = &tvcpu->arch.dtl;
511 case H_VPA_DEREG_SLB: /* deregister SLB shadow buffer */
512 vpap = &tvcpu->arch.slb_shadow;
518 vpap->next_gpa = vpa;
520 vpap->update_pending = 1;
523 spin_unlock(&tvcpu->arch.vpa_update_lock);
528 static void kvmppc_update_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *vpap)
530 struct kvm *kvm = vcpu->kvm;
536 * We need to pin the page pointed to by vpap->next_gpa,
537 * but we can't call kvmppc_pin_guest_page under the lock
538 * as it does get_user_pages() and down_read(). So we
539 * have to drop the lock, pin the page, then get the lock
540 * again and check that a new area didn't get registered
544 gpa = vpap->next_gpa;
545 spin_unlock(&vcpu->arch.vpa_update_lock);
549 va = kvmppc_pin_guest_page(kvm, gpa, &nb);
550 spin_lock(&vcpu->arch.vpa_update_lock);
551 if (gpa == vpap->next_gpa)
553 /* sigh... unpin that one and try again */
555 kvmppc_unpin_guest_page(kvm, va, gpa, false);
558 vpap->update_pending = 0;
559 if (va && nb < vpap->len) {
561 * If it's now too short, it must be that userspace
562 * has changed the mappings underlying guest memory,
563 * so unregister the region.
565 kvmppc_unpin_guest_page(kvm, va, gpa, false);
568 if (vpap->pinned_addr)
569 kvmppc_unpin_guest_page(kvm, vpap->pinned_addr, vpap->gpa,
572 vpap->pinned_addr = va;
575 vpap->pinned_end = va + vpap->len;
578 static void kvmppc_update_vpas(struct kvm_vcpu *vcpu)
580 if (!(vcpu->arch.vpa.update_pending ||
581 vcpu->arch.slb_shadow.update_pending ||
582 vcpu->arch.dtl.update_pending))
585 spin_lock(&vcpu->arch.vpa_update_lock);
586 if (vcpu->arch.vpa.update_pending) {
587 kvmppc_update_vpa(vcpu, &vcpu->arch.vpa);
588 if (vcpu->arch.vpa.pinned_addr)
589 init_vpa(vcpu, vcpu->arch.vpa.pinned_addr);
591 if (vcpu->arch.dtl.update_pending) {
592 kvmppc_update_vpa(vcpu, &vcpu->arch.dtl);
593 vcpu->arch.dtl_ptr = vcpu->arch.dtl.pinned_addr;
594 vcpu->arch.dtl_index = 0;
596 if (vcpu->arch.slb_shadow.update_pending)
597 kvmppc_update_vpa(vcpu, &vcpu->arch.slb_shadow);
598 spin_unlock(&vcpu->arch.vpa_update_lock);
602 * Return the accumulated stolen time for the vcore up until `now'.
603 * The caller should hold the vcore lock.
605 static u64 vcore_stolen_time(struct kvmppc_vcore *vc, u64 now)
610 spin_lock_irqsave(&vc->stoltb_lock, flags);
612 if (vc->vcore_state != VCORE_INACTIVE &&
613 vc->preempt_tb != TB_NIL)
614 p += now - vc->preempt_tb;
615 spin_unlock_irqrestore(&vc->stoltb_lock, flags);
619 static void kvmppc_create_dtl_entry(struct kvm_vcpu *vcpu,
620 struct kvmppc_vcore *vc)
622 struct dtl_entry *dt;
624 unsigned long stolen;
625 unsigned long core_stolen;
628 dt = vcpu->arch.dtl_ptr;
629 vpa = vcpu->arch.vpa.pinned_addr;
631 core_stolen = vcore_stolen_time(vc, now);
632 stolen = core_stolen - vcpu->arch.stolen_logged;
633 vcpu->arch.stolen_logged = core_stolen;
634 spin_lock_irq(&vcpu->arch.tbacct_lock);
635 stolen += vcpu->arch.busy_stolen;
636 vcpu->arch.busy_stolen = 0;
637 spin_unlock_irq(&vcpu->arch.tbacct_lock);
640 memset(dt, 0, sizeof(struct dtl_entry));
641 dt->dispatch_reason = 7;
642 dt->processor_id = cpu_to_be16(vc->pcpu + vcpu->arch.ptid);
643 dt->timebase = cpu_to_be64(now + vc->tb_offset);
644 dt->enqueue_to_dispatch_time = cpu_to_be32(stolen);
645 dt->srr0 = cpu_to_be64(kvmppc_get_pc(vcpu));
646 dt->srr1 = cpu_to_be64(vcpu->arch.shregs.msr);
648 if (dt == vcpu->arch.dtl.pinned_end)
649 dt = vcpu->arch.dtl.pinned_addr;
650 vcpu->arch.dtl_ptr = dt;
651 /* order writing *dt vs. writing vpa->dtl_idx */
653 vpa->dtl_idx = cpu_to_be64(++vcpu->arch.dtl_index);
654 vcpu->arch.dtl.dirty = true;
657 static bool kvmppc_power8_compatible(struct kvm_vcpu *vcpu)
659 if (vcpu->arch.vcore->arch_compat >= PVR_ARCH_207)
661 if ((!vcpu->arch.vcore->arch_compat) &&
662 cpu_has_feature(CPU_FTR_ARCH_207S))
667 static int kvmppc_h_set_mode(struct kvm_vcpu *vcpu, unsigned long mflags,
668 unsigned long resource, unsigned long value1,
669 unsigned long value2)
672 case H_SET_MODE_RESOURCE_SET_CIABR:
673 if (!kvmppc_power8_compatible(vcpu))
678 return H_UNSUPPORTED_FLAG_START;
679 /* Guests can't breakpoint the hypervisor */
680 if ((value1 & CIABR_PRIV) == CIABR_PRIV_HYPER)
682 vcpu->arch.ciabr = value1;
684 case H_SET_MODE_RESOURCE_SET_DAWR:
685 if (!kvmppc_power8_compatible(vcpu))
688 return H_UNSUPPORTED_FLAG_START;
689 if (value2 & DABRX_HYP)
691 vcpu->arch.dawr = value1;
692 vcpu->arch.dawrx = value2;
699 static int kvm_arch_vcpu_yield_to(struct kvm_vcpu *target)
701 struct kvmppc_vcore *vcore = target->arch.vcore;
704 * We expect to have been called by the real mode handler
705 * (kvmppc_rm_h_confer()) which would have directly returned
706 * H_SUCCESS if the source vcore wasn't idle (e.g. if it may
707 * have useful work to do and should not confer) so we don't
711 spin_lock(&vcore->lock);
712 if (target->arch.state == KVMPPC_VCPU_RUNNABLE &&
713 vcore->vcore_state != VCORE_INACTIVE &&
715 target = vcore->runner;
716 spin_unlock(&vcore->lock);
718 return kvm_vcpu_yield_to(target);
721 static int kvmppc_get_yield_count(struct kvm_vcpu *vcpu)
724 struct lppaca *lppaca;
726 spin_lock(&vcpu->arch.vpa_update_lock);
727 lppaca = (struct lppaca *)vcpu->arch.vpa.pinned_addr;
729 yield_count = be32_to_cpu(lppaca->yield_count);
730 spin_unlock(&vcpu->arch.vpa_update_lock);
734 int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu)
736 unsigned long req = kvmppc_get_gpr(vcpu, 3);
737 unsigned long target, ret = H_SUCCESS;
739 struct kvm_vcpu *tvcpu;
742 if (req <= MAX_HCALL_OPCODE &&
743 !test_bit(req/4, vcpu->kvm->arch.enabled_hcalls))
750 target = kvmppc_get_gpr(vcpu, 4);
751 tvcpu = kvmppc_find_vcpu(vcpu->kvm, target);
756 tvcpu->arch.prodded = 1;
758 if (vcpu->arch.ceded) {
759 if (swait_active(&vcpu->wq)) {
761 vcpu->stat.halt_wakeup++;
766 target = kvmppc_get_gpr(vcpu, 4);
769 tvcpu = kvmppc_find_vcpu(vcpu->kvm, target);
774 yield_count = kvmppc_get_gpr(vcpu, 5);
775 if (kvmppc_get_yield_count(tvcpu) != yield_count)
777 kvm_arch_vcpu_yield_to(tvcpu);
780 ret = do_h_register_vpa(vcpu, kvmppc_get_gpr(vcpu, 4),
781 kvmppc_get_gpr(vcpu, 5),
782 kvmppc_get_gpr(vcpu, 6));
785 if (list_empty(&vcpu->kvm->arch.rtas_tokens))
788 idx = srcu_read_lock(&vcpu->kvm->srcu);
789 rc = kvmppc_rtas_hcall(vcpu);
790 srcu_read_unlock(&vcpu->kvm->srcu, idx);
797 /* Send the error out to userspace via KVM_RUN */
799 case H_LOGICAL_CI_LOAD:
800 ret = kvmppc_h_logical_ci_load(vcpu);
801 if (ret == H_TOO_HARD)
804 case H_LOGICAL_CI_STORE:
805 ret = kvmppc_h_logical_ci_store(vcpu);
806 if (ret == H_TOO_HARD)
810 ret = kvmppc_h_set_mode(vcpu, kvmppc_get_gpr(vcpu, 4),
811 kvmppc_get_gpr(vcpu, 5),
812 kvmppc_get_gpr(vcpu, 6),
813 kvmppc_get_gpr(vcpu, 7));
814 if (ret == H_TOO_HARD)
823 if (kvmppc_xics_enabled(vcpu)) {
824 ret = kvmppc_xics_hcall(vcpu, req);
829 ret = kvmppc_h_put_tce(vcpu, kvmppc_get_gpr(vcpu, 4),
830 kvmppc_get_gpr(vcpu, 5),
831 kvmppc_get_gpr(vcpu, 6));
832 if (ret == H_TOO_HARD)
835 case H_PUT_TCE_INDIRECT:
836 ret = kvmppc_h_put_tce_indirect(vcpu, kvmppc_get_gpr(vcpu, 4),
837 kvmppc_get_gpr(vcpu, 5),
838 kvmppc_get_gpr(vcpu, 6),
839 kvmppc_get_gpr(vcpu, 7));
840 if (ret == H_TOO_HARD)
844 ret = kvmppc_h_stuff_tce(vcpu, kvmppc_get_gpr(vcpu, 4),
845 kvmppc_get_gpr(vcpu, 5),
846 kvmppc_get_gpr(vcpu, 6),
847 kvmppc_get_gpr(vcpu, 7));
848 if (ret == H_TOO_HARD)
854 kvmppc_set_gpr(vcpu, 3, ret);
855 vcpu->arch.hcall_needed = 0;
859 static int kvmppc_hcall_impl_hv(unsigned long cmd)
867 case H_LOGICAL_CI_LOAD:
868 case H_LOGICAL_CI_STORE:
869 #ifdef CONFIG_KVM_XICS
880 /* See if it's in the real-mode table */
881 return kvmppc_hcall_impl_hv_realmode(cmd);
884 static int kvmppc_emulate_debug_inst(struct kvm_run *run,
885 struct kvm_vcpu *vcpu)
889 if (kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst) !=
892 * Fetch failed, so return to guest and
893 * try executing it again.
898 if (last_inst == KVMPPC_INST_SW_BREAKPOINT) {
899 run->exit_reason = KVM_EXIT_DEBUG;
900 run->debug.arch.address = kvmppc_get_pc(vcpu);
903 kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
908 static int kvmppc_handle_exit_hv(struct kvm_run *run, struct kvm_vcpu *vcpu,
909 struct task_struct *tsk)
913 vcpu->stat.sum_exits++;
916 * This can happen if an interrupt occurs in the last stages
917 * of guest entry or the first stages of guest exit (i.e. after
918 * setting paca->kvm_hstate.in_guest to KVM_GUEST_MODE_GUEST_HV
919 * and before setting it to KVM_GUEST_MODE_HOST_HV).
920 * That can happen due to a bug, or due to a machine check
921 * occurring at just the wrong time.
923 if (vcpu->arch.shregs.msr & MSR_HV) {
924 printk(KERN_EMERG "KVM trap in HV mode!\n");
925 printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n",
926 vcpu->arch.trap, kvmppc_get_pc(vcpu),
927 vcpu->arch.shregs.msr);
928 kvmppc_dump_regs(vcpu);
929 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
930 run->hw.hardware_exit_reason = vcpu->arch.trap;
933 run->exit_reason = KVM_EXIT_UNKNOWN;
934 run->ready_for_interrupt_injection = 1;
935 switch (vcpu->arch.trap) {
936 /* We're good on these - the host merely wanted to get our attention */
937 case BOOK3S_INTERRUPT_HV_DECREMENTER:
938 vcpu->stat.dec_exits++;
941 case BOOK3S_INTERRUPT_EXTERNAL:
942 case BOOK3S_INTERRUPT_H_DOORBELL:
943 vcpu->stat.ext_intr_exits++;
946 /* HMI is hypervisor interrupt and host has handled it. Resume guest.*/
947 case BOOK3S_INTERRUPT_HMI:
948 case BOOK3S_INTERRUPT_PERFMON:
951 case BOOK3S_INTERRUPT_MACHINE_CHECK:
953 * Deliver a machine check interrupt to the guest.
954 * We have to do this, even if the host has handled the
955 * machine check, because machine checks use SRR0/1 and
956 * the interrupt might have trashed guest state in them.
958 kvmppc_book3s_queue_irqprio(vcpu,
959 BOOK3S_INTERRUPT_MACHINE_CHECK);
962 case BOOK3S_INTERRUPT_PROGRAM:
966 * Normally program interrupts are delivered directly
967 * to the guest by the hardware, but we can get here
968 * as a result of a hypervisor emulation interrupt
969 * (e40) getting turned into a 700 by BML RTAS.
971 flags = vcpu->arch.shregs.msr & 0x1f0000ull;
972 kvmppc_core_queue_program(vcpu, flags);
976 case BOOK3S_INTERRUPT_SYSCALL:
978 /* hcall - punt to userspace */
981 /* hypercall with MSR_PR has already been handled in rmode,
982 * and never reaches here.
985 run->papr_hcall.nr = kvmppc_get_gpr(vcpu, 3);
986 for (i = 0; i < 9; ++i)
987 run->papr_hcall.args[i] = kvmppc_get_gpr(vcpu, 4 + i);
988 run->exit_reason = KVM_EXIT_PAPR_HCALL;
989 vcpu->arch.hcall_needed = 1;
994 * We get these next two if the guest accesses a page which it thinks
995 * it has mapped but which is not actually present, either because
996 * it is for an emulated I/O device or because the corresonding
997 * host page has been paged out. Any other HDSI/HISI interrupts
998 * have been handled already.
1000 case BOOK3S_INTERRUPT_H_DATA_STORAGE:
1001 r = RESUME_PAGE_FAULT;
1003 case BOOK3S_INTERRUPT_H_INST_STORAGE:
1004 vcpu->arch.fault_dar = kvmppc_get_pc(vcpu);
1005 vcpu->arch.fault_dsisr = 0;
1006 r = RESUME_PAGE_FAULT;
1009 * This occurs if the guest executes an illegal instruction.
1010 * If the guest debug is disabled, generate a program interrupt
1011 * to the guest. If guest debug is enabled, we need to check
1012 * whether the instruction is a software breakpoint instruction.
1013 * Accordingly return to Guest or Host.
1015 case BOOK3S_INTERRUPT_H_EMUL_ASSIST:
1016 if (vcpu->arch.emul_inst != KVM_INST_FETCH_FAILED)
1017 vcpu->arch.last_inst = kvmppc_need_byteswap(vcpu) ?
1018 swab32(vcpu->arch.emul_inst) :
1019 vcpu->arch.emul_inst;
1020 if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) {
1021 r = kvmppc_emulate_debug_inst(run, vcpu);
1023 kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
1028 * This occurs if the guest (kernel or userspace), does something that
1029 * is prohibited by HFSCR. We just generate a program interrupt to
1032 case BOOK3S_INTERRUPT_H_FAC_UNAVAIL:
1033 kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
1036 case BOOK3S_INTERRUPT_HV_RM_HARD:
1037 r = RESUME_PASSTHROUGH;
1040 kvmppc_dump_regs(vcpu);
1041 printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n",
1042 vcpu->arch.trap, kvmppc_get_pc(vcpu),
1043 vcpu->arch.shregs.msr);
1044 run->hw.hardware_exit_reason = vcpu->arch.trap;
1052 static int kvm_arch_vcpu_ioctl_get_sregs_hv(struct kvm_vcpu *vcpu,
1053 struct kvm_sregs *sregs)
1057 memset(sregs, 0, sizeof(struct kvm_sregs));
1058 sregs->pvr = vcpu->arch.pvr;
1059 for (i = 0; i < vcpu->arch.slb_max; i++) {
1060 sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige;
1061 sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv;
1067 static int kvm_arch_vcpu_ioctl_set_sregs_hv(struct kvm_vcpu *vcpu,
1068 struct kvm_sregs *sregs)
1072 /* Only accept the same PVR as the host's, since we can't spoof it */
1073 if (sregs->pvr != vcpu->arch.pvr)
1077 for (i = 0; i < vcpu->arch.slb_nr; i++) {
1078 if (sregs->u.s.ppc64.slb[i].slbe & SLB_ESID_V) {
1079 vcpu->arch.slb[j].orige = sregs->u.s.ppc64.slb[i].slbe;
1080 vcpu->arch.slb[j].origv = sregs->u.s.ppc64.slb[i].slbv;
1084 vcpu->arch.slb_max = j;
1089 static void kvmppc_set_lpcr(struct kvm_vcpu *vcpu, u64 new_lpcr,
1090 bool preserve_top32)
1092 struct kvm *kvm = vcpu->kvm;
1093 struct kvmppc_vcore *vc = vcpu->arch.vcore;
1096 spin_lock(&vc->lock);
1098 * If ILE (interrupt little-endian) has changed, update the
1099 * MSR_LE bit in the intr_msr for each vcpu in this vcore.
1101 if ((new_lpcr & LPCR_ILE) != (vc->lpcr & LPCR_ILE)) {
1102 struct kvm_vcpu *vcpu;
1105 kvm_for_each_vcpu(i, vcpu, kvm) {
1106 if (vcpu->arch.vcore != vc)
1108 if (new_lpcr & LPCR_ILE)
1109 vcpu->arch.intr_msr |= MSR_LE;
1111 vcpu->arch.intr_msr &= ~MSR_LE;
1116 * Userspace can only modify DPFD (default prefetch depth),
1117 * ILE (interrupt little-endian) and TC (translation control).
1118 * On POWER8 userspace can also modify AIL (alt. interrupt loc.)
1120 mask = LPCR_DPFD | LPCR_ILE | LPCR_TC;
1121 if (cpu_has_feature(CPU_FTR_ARCH_207S))
1124 /* Broken 32-bit version of LPCR must not clear top bits */
1127 vc->lpcr = (vc->lpcr & ~mask) | (new_lpcr & mask);
1128 spin_unlock(&vc->lock);
1131 static int kvmppc_get_one_reg_hv(struct kvm_vcpu *vcpu, u64 id,
1132 union kvmppc_one_reg *val)
1138 case KVM_REG_PPC_DEBUG_INST:
1139 *val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT);
1141 case KVM_REG_PPC_HIOR:
1142 *val = get_reg_val(id, 0);
1144 case KVM_REG_PPC_DABR:
1145 *val = get_reg_val(id, vcpu->arch.dabr);
1147 case KVM_REG_PPC_DABRX:
1148 *val = get_reg_val(id, vcpu->arch.dabrx);
1150 case KVM_REG_PPC_DSCR:
1151 *val = get_reg_val(id, vcpu->arch.dscr);
1153 case KVM_REG_PPC_PURR:
1154 *val = get_reg_val(id, vcpu->arch.purr);
1156 case KVM_REG_PPC_SPURR:
1157 *val = get_reg_val(id, vcpu->arch.spurr);
1159 case KVM_REG_PPC_AMR:
1160 *val = get_reg_val(id, vcpu->arch.amr);
1162 case KVM_REG_PPC_UAMOR:
1163 *val = get_reg_val(id, vcpu->arch.uamor);
1165 case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRS:
1166 i = id - KVM_REG_PPC_MMCR0;
1167 *val = get_reg_val(id, vcpu->arch.mmcr[i]);
1169 case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8:
1170 i = id - KVM_REG_PPC_PMC1;
1171 *val = get_reg_val(id, vcpu->arch.pmc[i]);
1173 case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2:
1174 i = id - KVM_REG_PPC_SPMC1;
1175 *val = get_reg_val(id, vcpu->arch.spmc[i]);
1177 case KVM_REG_PPC_SIAR:
1178 *val = get_reg_val(id, vcpu->arch.siar);
1180 case KVM_REG_PPC_SDAR:
1181 *val = get_reg_val(id, vcpu->arch.sdar);
1183 case KVM_REG_PPC_SIER:
1184 *val = get_reg_val(id, vcpu->arch.sier);
1186 case KVM_REG_PPC_IAMR:
1187 *val = get_reg_val(id, vcpu->arch.iamr);
1189 case KVM_REG_PPC_PSPB:
1190 *val = get_reg_val(id, vcpu->arch.pspb);
1192 case KVM_REG_PPC_DPDES:
1193 *val = get_reg_val(id, vcpu->arch.vcore->dpdes);
1195 case KVM_REG_PPC_VTB:
1196 *val = get_reg_val(id, vcpu->arch.vcore->vtb);
1198 case KVM_REG_PPC_DAWR:
1199 *val = get_reg_val(id, vcpu->arch.dawr);
1201 case KVM_REG_PPC_DAWRX:
1202 *val = get_reg_val(id, vcpu->arch.dawrx);
1204 case KVM_REG_PPC_CIABR:
1205 *val = get_reg_val(id, vcpu->arch.ciabr);
1207 case KVM_REG_PPC_CSIGR:
1208 *val = get_reg_val(id, vcpu->arch.csigr);
1210 case KVM_REG_PPC_TACR:
1211 *val = get_reg_val(id, vcpu->arch.tacr);
1213 case KVM_REG_PPC_TCSCR:
1214 *val = get_reg_val(id, vcpu->arch.tcscr);
1216 case KVM_REG_PPC_PID:
1217 *val = get_reg_val(id, vcpu->arch.pid);
1219 case KVM_REG_PPC_ACOP:
1220 *val = get_reg_val(id, vcpu->arch.acop);
1222 case KVM_REG_PPC_WORT:
1223 *val = get_reg_val(id, vcpu->arch.wort);
1225 case KVM_REG_PPC_VPA_ADDR:
1226 spin_lock(&vcpu->arch.vpa_update_lock);
1227 *val = get_reg_val(id, vcpu->arch.vpa.next_gpa);
1228 spin_unlock(&vcpu->arch.vpa_update_lock);
1230 case KVM_REG_PPC_VPA_SLB:
1231 spin_lock(&vcpu->arch.vpa_update_lock);
1232 val->vpaval.addr = vcpu->arch.slb_shadow.next_gpa;
1233 val->vpaval.length = vcpu->arch.slb_shadow.len;
1234 spin_unlock(&vcpu->arch.vpa_update_lock);
1236 case KVM_REG_PPC_VPA_DTL:
1237 spin_lock(&vcpu->arch.vpa_update_lock);
1238 val->vpaval.addr = vcpu->arch.dtl.next_gpa;
1239 val->vpaval.length = vcpu->arch.dtl.len;
1240 spin_unlock(&vcpu->arch.vpa_update_lock);
1242 case KVM_REG_PPC_TB_OFFSET:
1243 *val = get_reg_val(id, vcpu->arch.vcore->tb_offset);
1245 case KVM_REG_PPC_LPCR:
1246 case KVM_REG_PPC_LPCR_64:
1247 *val = get_reg_val(id, vcpu->arch.vcore->lpcr);
1249 case KVM_REG_PPC_PPR:
1250 *val = get_reg_val(id, vcpu->arch.ppr);
1252 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1253 case KVM_REG_PPC_TFHAR:
1254 *val = get_reg_val(id, vcpu->arch.tfhar);
1256 case KVM_REG_PPC_TFIAR:
1257 *val = get_reg_val(id, vcpu->arch.tfiar);
1259 case KVM_REG_PPC_TEXASR:
1260 *val = get_reg_val(id, vcpu->arch.texasr);
1262 case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31:
1263 i = id - KVM_REG_PPC_TM_GPR0;
1264 *val = get_reg_val(id, vcpu->arch.gpr_tm[i]);
1266 case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63:
1269 i = id - KVM_REG_PPC_TM_VSR0;
1271 for (j = 0; j < TS_FPRWIDTH; j++)
1272 val->vsxval[j] = vcpu->arch.fp_tm.fpr[i][j];
1274 if (cpu_has_feature(CPU_FTR_ALTIVEC))
1275 val->vval = vcpu->arch.vr_tm.vr[i-32];
1281 case KVM_REG_PPC_TM_CR:
1282 *val = get_reg_val(id, vcpu->arch.cr_tm);
1284 case KVM_REG_PPC_TM_XER:
1285 *val = get_reg_val(id, vcpu->arch.xer_tm);
1287 case KVM_REG_PPC_TM_LR:
1288 *val = get_reg_val(id, vcpu->arch.lr_tm);
1290 case KVM_REG_PPC_TM_CTR:
1291 *val = get_reg_val(id, vcpu->arch.ctr_tm);
1293 case KVM_REG_PPC_TM_FPSCR:
1294 *val = get_reg_val(id, vcpu->arch.fp_tm.fpscr);
1296 case KVM_REG_PPC_TM_AMR:
1297 *val = get_reg_val(id, vcpu->arch.amr_tm);
1299 case KVM_REG_PPC_TM_PPR:
1300 *val = get_reg_val(id, vcpu->arch.ppr_tm);
1302 case KVM_REG_PPC_TM_VRSAVE:
1303 *val = get_reg_val(id, vcpu->arch.vrsave_tm);
1305 case KVM_REG_PPC_TM_VSCR:
1306 if (cpu_has_feature(CPU_FTR_ALTIVEC))
1307 *val = get_reg_val(id, vcpu->arch.vr_tm.vscr.u[3]);
1311 case KVM_REG_PPC_TM_DSCR:
1312 *val = get_reg_val(id, vcpu->arch.dscr_tm);
1314 case KVM_REG_PPC_TM_TAR:
1315 *val = get_reg_val(id, vcpu->arch.tar_tm);
1318 case KVM_REG_PPC_ARCH_COMPAT:
1319 *val = get_reg_val(id, vcpu->arch.vcore->arch_compat);
1329 static int kvmppc_set_one_reg_hv(struct kvm_vcpu *vcpu, u64 id,
1330 union kvmppc_one_reg *val)
1334 unsigned long addr, len;
1337 case KVM_REG_PPC_HIOR:
1338 /* Only allow this to be set to zero */
1339 if (set_reg_val(id, *val))
1342 case KVM_REG_PPC_DABR:
1343 vcpu->arch.dabr = set_reg_val(id, *val);
1345 case KVM_REG_PPC_DABRX:
1346 vcpu->arch.dabrx = set_reg_val(id, *val) & ~DABRX_HYP;
1348 case KVM_REG_PPC_DSCR:
1349 vcpu->arch.dscr = set_reg_val(id, *val);
1351 case KVM_REG_PPC_PURR:
1352 vcpu->arch.purr = set_reg_val(id, *val);
1354 case KVM_REG_PPC_SPURR:
1355 vcpu->arch.spurr = set_reg_val(id, *val);
1357 case KVM_REG_PPC_AMR:
1358 vcpu->arch.amr = set_reg_val(id, *val);
1360 case KVM_REG_PPC_UAMOR:
1361 vcpu->arch.uamor = set_reg_val(id, *val);
1363 case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRS:
1364 i = id - KVM_REG_PPC_MMCR0;
1365 vcpu->arch.mmcr[i] = set_reg_val(id, *val);
1367 case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8:
1368 i = id - KVM_REG_PPC_PMC1;
1369 vcpu->arch.pmc[i] = set_reg_val(id, *val);
1371 case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2:
1372 i = id - KVM_REG_PPC_SPMC1;
1373 vcpu->arch.spmc[i] = set_reg_val(id, *val);
1375 case KVM_REG_PPC_SIAR:
1376 vcpu->arch.siar = set_reg_val(id, *val);
1378 case KVM_REG_PPC_SDAR:
1379 vcpu->arch.sdar = set_reg_val(id, *val);
1381 case KVM_REG_PPC_SIER:
1382 vcpu->arch.sier = set_reg_val(id, *val);
1384 case KVM_REG_PPC_IAMR:
1385 vcpu->arch.iamr = set_reg_val(id, *val);
1387 case KVM_REG_PPC_PSPB:
1388 vcpu->arch.pspb = set_reg_val(id, *val);
1390 case KVM_REG_PPC_DPDES:
1391 vcpu->arch.vcore->dpdes = set_reg_val(id, *val);
1393 case KVM_REG_PPC_VTB:
1394 vcpu->arch.vcore->vtb = set_reg_val(id, *val);
1396 case KVM_REG_PPC_DAWR:
1397 vcpu->arch.dawr = set_reg_val(id, *val);
1399 case KVM_REG_PPC_DAWRX:
1400 vcpu->arch.dawrx = set_reg_val(id, *val) & ~DAWRX_HYP;
1402 case KVM_REG_PPC_CIABR:
1403 vcpu->arch.ciabr = set_reg_val(id, *val);
1404 /* Don't allow setting breakpoints in hypervisor code */
1405 if ((vcpu->arch.ciabr & CIABR_PRIV) == CIABR_PRIV_HYPER)
1406 vcpu->arch.ciabr &= ~CIABR_PRIV; /* disable */
1408 case KVM_REG_PPC_CSIGR:
1409 vcpu->arch.csigr = set_reg_val(id, *val);
1411 case KVM_REG_PPC_TACR:
1412 vcpu->arch.tacr = set_reg_val(id, *val);
1414 case KVM_REG_PPC_TCSCR:
1415 vcpu->arch.tcscr = set_reg_val(id, *val);
1417 case KVM_REG_PPC_PID:
1418 vcpu->arch.pid = set_reg_val(id, *val);
1420 case KVM_REG_PPC_ACOP:
1421 vcpu->arch.acop = set_reg_val(id, *val);
1423 case KVM_REG_PPC_WORT:
1424 vcpu->arch.wort = set_reg_val(id, *val);
1426 case KVM_REG_PPC_VPA_ADDR:
1427 addr = set_reg_val(id, *val);
1429 if (!addr && (vcpu->arch.slb_shadow.next_gpa ||
1430 vcpu->arch.dtl.next_gpa))
1432 r = set_vpa(vcpu, &vcpu->arch.vpa, addr, sizeof(struct lppaca));
1434 case KVM_REG_PPC_VPA_SLB:
1435 addr = val->vpaval.addr;
1436 len = val->vpaval.length;
1438 if (addr && !vcpu->arch.vpa.next_gpa)
1440 r = set_vpa(vcpu, &vcpu->arch.slb_shadow, addr, len);
1442 case KVM_REG_PPC_VPA_DTL:
1443 addr = val->vpaval.addr;
1444 len = val->vpaval.length;
1446 if (addr && (len < sizeof(struct dtl_entry) ||
1447 !vcpu->arch.vpa.next_gpa))
1449 len -= len % sizeof(struct dtl_entry);
1450 r = set_vpa(vcpu, &vcpu->arch.dtl, addr, len);
1452 case KVM_REG_PPC_TB_OFFSET:
1453 /* round up to multiple of 2^24 */
1454 vcpu->arch.vcore->tb_offset =
1455 ALIGN(set_reg_val(id, *val), 1UL << 24);
1457 case KVM_REG_PPC_LPCR:
1458 kvmppc_set_lpcr(vcpu, set_reg_val(id, *val), true);
1460 case KVM_REG_PPC_LPCR_64:
1461 kvmppc_set_lpcr(vcpu, set_reg_val(id, *val), false);
1463 case KVM_REG_PPC_PPR:
1464 vcpu->arch.ppr = set_reg_val(id, *val);
1466 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1467 case KVM_REG_PPC_TFHAR:
1468 vcpu->arch.tfhar = set_reg_val(id, *val);
1470 case KVM_REG_PPC_TFIAR:
1471 vcpu->arch.tfiar = set_reg_val(id, *val);
1473 case KVM_REG_PPC_TEXASR:
1474 vcpu->arch.texasr = set_reg_val(id, *val);
1476 case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31:
1477 i = id - KVM_REG_PPC_TM_GPR0;
1478 vcpu->arch.gpr_tm[i] = set_reg_val(id, *val);
1480 case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63:
1483 i = id - KVM_REG_PPC_TM_VSR0;
1485 for (j = 0; j < TS_FPRWIDTH; j++)
1486 vcpu->arch.fp_tm.fpr[i][j] = val->vsxval[j];
1488 if (cpu_has_feature(CPU_FTR_ALTIVEC))
1489 vcpu->arch.vr_tm.vr[i-32] = val->vval;
1494 case KVM_REG_PPC_TM_CR:
1495 vcpu->arch.cr_tm = set_reg_val(id, *val);
1497 case KVM_REG_PPC_TM_XER:
1498 vcpu->arch.xer_tm = set_reg_val(id, *val);
1500 case KVM_REG_PPC_TM_LR:
1501 vcpu->arch.lr_tm = set_reg_val(id, *val);
1503 case KVM_REG_PPC_TM_CTR:
1504 vcpu->arch.ctr_tm = set_reg_val(id, *val);
1506 case KVM_REG_PPC_TM_FPSCR:
1507 vcpu->arch.fp_tm.fpscr = set_reg_val(id, *val);
1509 case KVM_REG_PPC_TM_AMR:
1510 vcpu->arch.amr_tm = set_reg_val(id, *val);
1512 case KVM_REG_PPC_TM_PPR:
1513 vcpu->arch.ppr_tm = set_reg_val(id, *val);
1515 case KVM_REG_PPC_TM_VRSAVE:
1516 vcpu->arch.vrsave_tm = set_reg_val(id, *val);
1518 case KVM_REG_PPC_TM_VSCR:
1519 if (cpu_has_feature(CPU_FTR_ALTIVEC))
1520 vcpu->arch.vr.vscr.u[3] = set_reg_val(id, *val);
1524 case KVM_REG_PPC_TM_DSCR:
1525 vcpu->arch.dscr_tm = set_reg_val(id, *val);
1527 case KVM_REG_PPC_TM_TAR:
1528 vcpu->arch.tar_tm = set_reg_val(id, *val);
1531 case KVM_REG_PPC_ARCH_COMPAT:
1532 r = kvmppc_set_arch_compat(vcpu, set_reg_val(id, *val));
1542 static struct kvmppc_vcore *kvmppc_vcore_create(struct kvm *kvm, int core)
1544 struct kvmppc_vcore *vcore;
1546 vcore = kzalloc(sizeof(struct kvmppc_vcore), GFP_KERNEL);
1551 spin_lock_init(&vcore->lock);
1552 spin_lock_init(&vcore->stoltb_lock);
1553 init_swait_queue_head(&vcore->wq);
1554 vcore->preempt_tb = TB_NIL;
1555 vcore->lpcr = kvm->arch.lpcr;
1556 vcore->first_vcpuid = core * threads_per_subcore;
1558 INIT_LIST_HEAD(&vcore->preempt_list);
1563 #ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING
1564 static struct debugfs_timings_element {
1568 {"rm_entry", offsetof(struct kvm_vcpu, arch.rm_entry)},
1569 {"rm_intr", offsetof(struct kvm_vcpu, arch.rm_intr)},
1570 {"rm_exit", offsetof(struct kvm_vcpu, arch.rm_exit)},
1571 {"guest", offsetof(struct kvm_vcpu, arch.guest_time)},
1572 {"cede", offsetof(struct kvm_vcpu, arch.cede_time)},
1575 #define N_TIMINGS (sizeof(timings) / sizeof(timings[0]))
1577 struct debugfs_timings_state {
1578 struct kvm_vcpu *vcpu;
1579 unsigned int buflen;
1580 char buf[N_TIMINGS * 100];
1583 static int debugfs_timings_open(struct inode *inode, struct file *file)
1585 struct kvm_vcpu *vcpu = inode->i_private;
1586 struct debugfs_timings_state *p;
1588 p = kzalloc(sizeof(*p), GFP_KERNEL);
1592 kvm_get_kvm(vcpu->kvm);
1594 file->private_data = p;
1596 return nonseekable_open(inode, file);
1599 static int debugfs_timings_release(struct inode *inode, struct file *file)
1601 struct debugfs_timings_state *p = file->private_data;
1603 kvm_put_kvm(p->vcpu->kvm);
1608 static ssize_t debugfs_timings_read(struct file *file, char __user *buf,
1609 size_t len, loff_t *ppos)
1611 struct debugfs_timings_state *p = file->private_data;
1612 struct kvm_vcpu *vcpu = p->vcpu;
1614 struct kvmhv_tb_accumulator tb;
1623 buf_end = s + sizeof(p->buf);
1624 for (i = 0; i < N_TIMINGS; ++i) {
1625 struct kvmhv_tb_accumulator *acc;
1627 acc = (struct kvmhv_tb_accumulator *)
1628 ((unsigned long)vcpu + timings[i].offset);
1630 for (loops = 0; loops < 1000; ++loops) {
1631 count = acc->seqcount;
1636 if (count == acc->seqcount) {
1644 snprintf(s, buf_end - s, "%s: stuck\n",
1647 snprintf(s, buf_end - s,
1648 "%s: %llu %llu %llu %llu\n",
1649 timings[i].name, count / 2,
1650 tb_to_ns(tb.tb_total),
1651 tb_to_ns(tb.tb_min),
1652 tb_to_ns(tb.tb_max));
1655 p->buflen = s - p->buf;
1659 if (pos >= p->buflen)
1661 if (len > p->buflen - pos)
1662 len = p->buflen - pos;
1663 n = copy_to_user(buf, p->buf + pos, len);
1673 static ssize_t debugfs_timings_write(struct file *file, const char __user *buf,
1674 size_t len, loff_t *ppos)
1679 static const struct file_operations debugfs_timings_ops = {
1680 .owner = THIS_MODULE,
1681 .open = debugfs_timings_open,
1682 .release = debugfs_timings_release,
1683 .read = debugfs_timings_read,
1684 .write = debugfs_timings_write,
1685 .llseek = generic_file_llseek,
1688 /* Create a debugfs directory for the vcpu */
1689 static void debugfs_vcpu_init(struct kvm_vcpu *vcpu, unsigned int id)
1692 struct kvm *kvm = vcpu->kvm;
1694 snprintf(buf, sizeof(buf), "vcpu%u", id);
1695 if (IS_ERR_OR_NULL(kvm->arch.debugfs_dir))
1697 vcpu->arch.debugfs_dir = debugfs_create_dir(buf, kvm->arch.debugfs_dir);
1698 if (IS_ERR_OR_NULL(vcpu->arch.debugfs_dir))
1700 vcpu->arch.debugfs_timings =
1701 debugfs_create_file("timings", 0444, vcpu->arch.debugfs_dir,
1702 vcpu, &debugfs_timings_ops);
1705 #else /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */
1706 static void debugfs_vcpu_init(struct kvm_vcpu *vcpu, unsigned int id)
1709 #endif /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */
1711 static struct kvm_vcpu *kvmppc_core_vcpu_create_hv(struct kvm *kvm,
1714 struct kvm_vcpu *vcpu;
1717 struct kvmppc_vcore *vcore;
1719 core = id / threads_per_subcore;
1720 if (core >= KVM_MAX_VCORES)
1724 vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
1728 err = kvm_vcpu_init(vcpu, kvm, id);
1732 vcpu->arch.shared = &vcpu->arch.shregs;
1733 #ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE
1735 * The shared struct is never shared on HV,
1736 * so we can always use host endianness
1738 #ifdef __BIG_ENDIAN__
1739 vcpu->arch.shared_big_endian = true;
1741 vcpu->arch.shared_big_endian = false;
1744 vcpu->arch.mmcr[0] = MMCR0_FC;
1745 vcpu->arch.ctrl = CTRL_RUNLATCH;
1746 /* default to host PVR, since we can't spoof it */
1747 kvmppc_set_pvr_hv(vcpu, mfspr(SPRN_PVR));
1748 spin_lock_init(&vcpu->arch.vpa_update_lock);
1749 spin_lock_init(&vcpu->arch.tbacct_lock);
1750 vcpu->arch.busy_preempt = TB_NIL;
1751 vcpu->arch.intr_msr = MSR_SF | MSR_ME;
1753 kvmppc_mmu_book3s_hv_init(vcpu);
1755 vcpu->arch.state = KVMPPC_VCPU_NOTREADY;
1757 init_waitqueue_head(&vcpu->arch.cpu_run);
1759 mutex_lock(&kvm->lock);
1760 vcore = kvm->arch.vcores[core];
1762 vcore = kvmppc_vcore_create(kvm, core);
1763 kvm->arch.vcores[core] = vcore;
1764 kvm->arch.online_vcores++;
1766 mutex_unlock(&kvm->lock);
1771 spin_lock(&vcore->lock);
1772 ++vcore->num_threads;
1773 spin_unlock(&vcore->lock);
1774 vcpu->arch.vcore = vcore;
1775 vcpu->arch.ptid = vcpu->vcpu_id - vcore->first_vcpuid;
1776 vcpu->arch.thread_cpu = -1;
1778 vcpu->arch.cpu_type = KVM_CPU_3S_64;
1779 kvmppc_sanity_check(vcpu);
1781 debugfs_vcpu_init(vcpu, id);
1786 kvm_vcpu_uninit(vcpu);
1788 kmem_cache_free(kvm_vcpu_cache, vcpu);
1790 return ERR_PTR(err);
1793 static void unpin_vpa(struct kvm *kvm, struct kvmppc_vpa *vpa)
1795 if (vpa->pinned_addr)
1796 kvmppc_unpin_guest_page(kvm, vpa->pinned_addr, vpa->gpa,
1800 static void kvmppc_core_vcpu_free_hv(struct kvm_vcpu *vcpu)
1802 spin_lock(&vcpu->arch.vpa_update_lock);
1803 unpin_vpa(vcpu->kvm, &vcpu->arch.dtl);
1804 unpin_vpa(vcpu->kvm, &vcpu->arch.slb_shadow);
1805 unpin_vpa(vcpu->kvm, &vcpu->arch.vpa);
1806 spin_unlock(&vcpu->arch.vpa_update_lock);
1807 kvm_vcpu_uninit(vcpu);
1808 kmem_cache_free(kvm_vcpu_cache, vcpu);
1811 static int kvmppc_core_check_requests_hv(struct kvm_vcpu *vcpu)
1813 /* Indicate we want to get back into the guest */
1817 static void kvmppc_set_timer(struct kvm_vcpu *vcpu)
1819 unsigned long dec_nsec, now;
1822 if (now > vcpu->arch.dec_expires) {
1823 /* decrementer has already gone negative */
1824 kvmppc_core_queue_dec(vcpu);
1825 kvmppc_core_prepare_to_enter(vcpu);
1828 dec_nsec = (vcpu->arch.dec_expires - now) * NSEC_PER_SEC
1830 hrtimer_start(&vcpu->arch.dec_timer, ktime_set(0, dec_nsec),
1832 vcpu->arch.timer_running = 1;
1835 static void kvmppc_end_cede(struct kvm_vcpu *vcpu)
1837 vcpu->arch.ceded = 0;
1838 if (vcpu->arch.timer_running) {
1839 hrtimer_try_to_cancel(&vcpu->arch.dec_timer);
1840 vcpu->arch.timer_running = 0;
1844 extern void __kvmppc_vcore_entry(void);
1846 static void kvmppc_remove_runnable(struct kvmppc_vcore *vc,
1847 struct kvm_vcpu *vcpu)
1851 if (vcpu->arch.state != KVMPPC_VCPU_RUNNABLE)
1853 spin_lock_irq(&vcpu->arch.tbacct_lock);
1855 vcpu->arch.busy_stolen += vcore_stolen_time(vc, now) -
1856 vcpu->arch.stolen_logged;
1857 vcpu->arch.busy_preempt = now;
1858 vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST;
1859 spin_unlock_irq(&vcpu->arch.tbacct_lock);
1861 WRITE_ONCE(vc->runnable_threads[vcpu->arch.ptid], NULL);
1864 static int kvmppc_grab_hwthread(int cpu)
1866 struct paca_struct *tpaca;
1867 long timeout = 10000;
1871 /* Ensure the thread won't go into the kernel if it wakes */
1872 tpaca->kvm_hstate.kvm_vcpu = NULL;
1873 tpaca->kvm_hstate.kvm_vcore = NULL;
1874 tpaca->kvm_hstate.napping = 0;
1876 tpaca->kvm_hstate.hwthread_req = 1;
1879 * If the thread is already executing in the kernel (e.g. handling
1880 * a stray interrupt), wait for it to get back to nap mode.
1881 * The smp_mb() is to ensure that our setting of hwthread_req
1882 * is visible before we look at hwthread_state, so if this
1883 * races with the code at system_reset_pSeries and the thread
1884 * misses our setting of hwthread_req, we are sure to see its
1885 * setting of hwthread_state, and vice versa.
1888 while (tpaca->kvm_hstate.hwthread_state == KVM_HWTHREAD_IN_KERNEL) {
1889 if (--timeout <= 0) {
1890 pr_err("KVM: couldn't grab cpu %d\n", cpu);
1898 static void kvmppc_release_hwthread(int cpu)
1900 struct paca_struct *tpaca;
1903 tpaca->kvm_hstate.hwthread_req = 0;
1904 tpaca->kvm_hstate.kvm_vcpu = NULL;
1905 tpaca->kvm_hstate.kvm_vcore = NULL;
1906 tpaca->kvm_hstate.kvm_split_mode = NULL;
1909 static void kvmppc_start_thread(struct kvm_vcpu *vcpu, struct kvmppc_vcore *vc)
1912 struct paca_struct *tpaca;
1913 struct kvmppc_vcore *mvc = vc->master_vcore;
1917 if (vcpu->arch.timer_running) {
1918 hrtimer_try_to_cancel(&vcpu->arch.dec_timer);
1919 vcpu->arch.timer_running = 0;
1921 cpu += vcpu->arch.ptid;
1922 vcpu->cpu = mvc->pcpu;
1923 vcpu->arch.thread_cpu = cpu;
1926 tpaca->kvm_hstate.kvm_vcpu = vcpu;
1927 tpaca->kvm_hstate.ptid = cpu - mvc->pcpu;
1928 /* Order stores to hstate.kvm_vcpu etc. before store to kvm_vcore */
1930 tpaca->kvm_hstate.kvm_vcore = mvc;
1931 if (cpu != smp_processor_id())
1932 kvmppc_ipi_thread(cpu);
1935 static void kvmppc_wait_for_nap(void)
1937 int cpu = smp_processor_id();
1940 for (loops = 0; loops < 1000000; ++loops) {
1942 * Check if all threads are finished.
1943 * We set the vcore pointer when starting a thread
1944 * and the thread clears it when finished, so we look
1945 * for any threads that still have a non-NULL vcore ptr.
1947 for (i = 1; i < threads_per_subcore; ++i)
1948 if (paca[cpu + i].kvm_hstate.kvm_vcore)
1950 if (i == threads_per_subcore) {
1957 for (i = 1; i < threads_per_subcore; ++i)
1958 if (paca[cpu + i].kvm_hstate.kvm_vcore)
1959 pr_err("KVM: CPU %d seems to be stuck\n", cpu + i);
1963 * Check that we are on thread 0 and that any other threads in
1964 * this core are off-line. Then grab the threads so they can't
1967 static int on_primary_thread(void)
1969 int cpu = smp_processor_id();
1972 /* Are we on a primary subcore? */
1973 if (cpu_thread_in_subcore(cpu))
1977 while (++thr < threads_per_subcore)
1978 if (cpu_online(cpu + thr))
1981 /* Grab all hw threads so they can't go into the kernel */
1982 for (thr = 1; thr < threads_per_subcore; ++thr) {
1983 if (kvmppc_grab_hwthread(cpu + thr)) {
1984 /* Couldn't grab one; let the others go */
1986 kvmppc_release_hwthread(cpu + thr);
1987 } while (--thr > 0);
1995 * A list of virtual cores for each physical CPU.
1996 * These are vcores that could run but their runner VCPU tasks are
1997 * (or may be) preempted.
1999 struct preempted_vcore_list {
2000 struct list_head list;
2004 static DEFINE_PER_CPU(struct preempted_vcore_list, preempted_vcores);
2006 static void init_vcore_lists(void)
2010 for_each_possible_cpu(cpu) {
2011 struct preempted_vcore_list *lp = &per_cpu(preempted_vcores, cpu);
2012 spin_lock_init(&lp->lock);
2013 INIT_LIST_HEAD(&lp->list);
2017 static void kvmppc_vcore_preempt(struct kvmppc_vcore *vc)
2019 struct preempted_vcore_list *lp = this_cpu_ptr(&preempted_vcores);
2021 vc->vcore_state = VCORE_PREEMPT;
2022 vc->pcpu = smp_processor_id();
2023 if (vc->num_threads < threads_per_subcore) {
2024 spin_lock(&lp->lock);
2025 list_add_tail(&vc->preempt_list, &lp->list);
2026 spin_unlock(&lp->lock);
2029 /* Start accumulating stolen time */
2030 kvmppc_core_start_stolen(vc);
2033 static void kvmppc_vcore_end_preempt(struct kvmppc_vcore *vc)
2035 struct preempted_vcore_list *lp;
2037 kvmppc_core_end_stolen(vc);
2038 if (!list_empty(&vc->preempt_list)) {
2039 lp = &per_cpu(preempted_vcores, vc->pcpu);
2040 spin_lock(&lp->lock);
2041 list_del_init(&vc->preempt_list);
2042 spin_unlock(&lp->lock);
2044 vc->vcore_state = VCORE_INACTIVE;
2048 * This stores information about the virtual cores currently
2049 * assigned to a physical core.
2053 int max_subcore_threads;
2055 int subcore_threads[MAX_SUBCORES];
2056 struct kvm *subcore_vm[MAX_SUBCORES];
2057 struct list_head vcs[MAX_SUBCORES];
2061 * This mapping means subcores 0 and 1 can use threads 0-3 and 4-7
2062 * respectively in 2-way micro-threading (split-core) mode.
2064 static int subcore_thread_map[MAX_SUBCORES] = { 0, 4, 2, 6 };
2066 static void init_core_info(struct core_info *cip, struct kvmppc_vcore *vc)
2070 memset(cip, 0, sizeof(*cip));
2071 cip->n_subcores = 1;
2072 cip->max_subcore_threads = vc->num_threads;
2073 cip->total_threads = vc->num_threads;
2074 cip->subcore_threads[0] = vc->num_threads;
2075 cip->subcore_vm[0] = vc->kvm;
2076 for (sub = 0; sub < MAX_SUBCORES; ++sub)
2077 INIT_LIST_HEAD(&cip->vcs[sub]);
2078 list_add_tail(&vc->preempt_list, &cip->vcs[0]);
2081 static bool subcore_config_ok(int n_subcores, int n_threads)
2083 /* Can only dynamically split if unsplit to begin with */
2084 if (n_subcores > 1 && threads_per_subcore < MAX_SMT_THREADS)
2086 if (n_subcores > MAX_SUBCORES)
2088 if (n_subcores > 1) {
2089 if (!(dynamic_mt_modes & 2))
2091 if (n_subcores > 2 && !(dynamic_mt_modes & 4))
2095 return n_subcores * roundup_pow_of_two(n_threads) <= MAX_SMT_THREADS;
2098 static void init_master_vcore(struct kvmppc_vcore *vc)
2100 vc->master_vcore = vc;
2101 vc->entry_exit_map = 0;
2103 vc->napping_threads = 0;
2104 vc->conferring_threads = 0;
2107 static bool can_dynamic_split(struct kvmppc_vcore *vc, struct core_info *cip)
2109 int n_threads = vc->num_threads;
2112 if (!cpu_has_feature(CPU_FTR_ARCH_207S))
2115 if (n_threads < cip->max_subcore_threads)
2116 n_threads = cip->max_subcore_threads;
2117 if (!subcore_config_ok(cip->n_subcores + 1, n_threads))
2119 cip->max_subcore_threads = n_threads;
2121 sub = cip->n_subcores;
2123 cip->total_threads += vc->num_threads;
2124 cip->subcore_threads[sub] = vc->num_threads;
2125 cip->subcore_vm[sub] = vc->kvm;
2126 init_master_vcore(vc);
2127 list_del(&vc->preempt_list);
2128 list_add_tail(&vc->preempt_list, &cip->vcs[sub]);
2134 * Work out whether it is possible to piggyback the execution of
2135 * vcore *pvc onto the execution of the other vcores described in *cip.
2137 static bool can_piggyback(struct kvmppc_vcore *pvc, struct core_info *cip,
2140 if (cip->total_threads + pvc->num_threads > target_threads)
2143 return can_dynamic_split(pvc, cip);
2146 static void prepare_threads(struct kvmppc_vcore *vc)
2149 struct kvm_vcpu *vcpu;
2151 for_each_runnable_thread(i, vcpu, vc) {
2152 if (signal_pending(vcpu->arch.run_task))
2153 vcpu->arch.ret = -EINTR;
2154 else if (vcpu->arch.vpa.update_pending ||
2155 vcpu->arch.slb_shadow.update_pending ||
2156 vcpu->arch.dtl.update_pending)
2157 vcpu->arch.ret = RESUME_GUEST;
2160 kvmppc_remove_runnable(vc, vcpu);
2161 wake_up(&vcpu->arch.cpu_run);
2165 static void collect_piggybacks(struct core_info *cip, int target_threads)
2167 struct preempted_vcore_list *lp = this_cpu_ptr(&preempted_vcores);
2168 struct kvmppc_vcore *pvc, *vcnext;
2170 spin_lock(&lp->lock);
2171 list_for_each_entry_safe(pvc, vcnext, &lp->list, preempt_list) {
2172 if (!spin_trylock(&pvc->lock))
2174 prepare_threads(pvc);
2175 if (!pvc->n_runnable) {
2176 list_del_init(&pvc->preempt_list);
2177 if (pvc->runner == NULL) {
2178 pvc->vcore_state = VCORE_INACTIVE;
2179 kvmppc_core_end_stolen(pvc);
2181 spin_unlock(&pvc->lock);
2184 if (!can_piggyback(pvc, cip, target_threads)) {
2185 spin_unlock(&pvc->lock);
2188 kvmppc_core_end_stolen(pvc);
2189 pvc->vcore_state = VCORE_PIGGYBACK;
2190 if (cip->total_threads >= target_threads)
2193 spin_unlock(&lp->lock);
2196 static void post_guest_process(struct kvmppc_vcore *vc, bool is_master)
2198 int still_running = 0, i;
2201 struct kvm_vcpu *vcpu;
2203 spin_lock(&vc->lock);
2205 for_each_runnable_thread(i, vcpu, vc) {
2206 /* cancel pending dec exception if dec is positive */
2207 if (now < vcpu->arch.dec_expires &&
2208 kvmppc_core_pending_dec(vcpu))
2209 kvmppc_core_dequeue_dec(vcpu);
2211 trace_kvm_guest_exit(vcpu);
2214 if (vcpu->arch.trap)
2215 ret = kvmppc_handle_exit_hv(vcpu->arch.kvm_run, vcpu,
2216 vcpu->arch.run_task);
2218 vcpu->arch.ret = ret;
2219 vcpu->arch.trap = 0;
2221 if (is_kvmppc_resume_guest(vcpu->arch.ret)) {
2222 if (vcpu->arch.pending_exceptions)
2223 kvmppc_core_prepare_to_enter(vcpu);
2224 if (vcpu->arch.ceded)
2225 kvmppc_set_timer(vcpu);
2229 kvmppc_remove_runnable(vc, vcpu);
2230 wake_up(&vcpu->arch.cpu_run);
2233 list_del_init(&vc->preempt_list);
2235 if (still_running > 0) {
2236 kvmppc_vcore_preempt(vc);
2237 } else if (vc->runner) {
2238 vc->vcore_state = VCORE_PREEMPT;
2239 kvmppc_core_start_stolen(vc);
2241 vc->vcore_state = VCORE_INACTIVE;
2243 if (vc->n_runnable > 0 && vc->runner == NULL) {
2244 /* make sure there's a candidate runner awake */
2246 vcpu = next_runnable_thread(vc, &i);
2247 wake_up(&vcpu->arch.cpu_run);
2250 spin_unlock(&vc->lock);
2254 * Clear core from the list of active host cores as we are about to
2255 * enter the guest. Only do this if it is the primary thread of the
2256 * core (not if a subcore) that is entering the guest.
2258 static inline void kvmppc_clear_host_core(int cpu)
2262 if (!kvmppc_host_rm_ops_hv || cpu_thread_in_core(cpu))
2265 * Memory barrier can be omitted here as we will do a smp_wmb()
2266 * later in kvmppc_start_thread and we need ensure that state is
2267 * visible to other CPUs only after we enter guest.
2269 core = cpu >> threads_shift;
2270 kvmppc_host_rm_ops_hv->rm_core[core].rm_state.in_host = 0;
2274 * Advertise this core as an active host core since we exited the guest
2275 * Only need to do this if it is the primary thread of the core that is
2278 static inline void kvmppc_set_host_core(int cpu)
2282 if (!kvmppc_host_rm_ops_hv || cpu_thread_in_core(cpu))
2286 * Memory barrier can be omitted here because we do a spin_unlock
2287 * immediately after this which provides the memory barrier.
2289 core = cpu >> threads_shift;
2290 kvmppc_host_rm_ops_hv->rm_core[core].rm_state.in_host = 1;
2294 * Run a set of guest threads on a physical core.
2295 * Called with vc->lock held.
2297 static noinline void kvmppc_run_core(struct kvmppc_vcore *vc)
2299 struct kvm_vcpu *vcpu;
2302 struct core_info core_info;
2303 struct kvmppc_vcore *pvc, *vcnext;
2304 struct kvm_split_mode split_info, *sip;
2305 int split, subcore_size, active;
2308 unsigned long cmd_bit, stat_bit;
2313 * Remove from the list any threads that have a signal pending
2314 * or need a VPA update done
2316 prepare_threads(vc);
2318 /* if the runner is no longer runnable, let the caller pick a new one */
2319 if (vc->runner->arch.state != KVMPPC_VCPU_RUNNABLE)
2325 init_master_vcore(vc);
2326 vc->preempt_tb = TB_NIL;
2329 * Make sure we are running on primary threads, and that secondary
2330 * threads are offline. Also check if the number of threads in this
2331 * guest are greater than the current system threads per guest.
2333 if ((threads_per_core > 1) &&
2334 ((vc->num_threads > threads_per_subcore) || !on_primary_thread())) {
2335 for_each_runnable_thread(i, vcpu, vc) {
2336 vcpu->arch.ret = -EBUSY;
2337 kvmppc_remove_runnable(vc, vcpu);
2338 wake_up(&vcpu->arch.cpu_run);
2344 * See if we could run any other vcores on the physical core
2345 * along with this one.
2347 init_core_info(&core_info, vc);
2348 pcpu = smp_processor_id();
2349 target_threads = threads_per_subcore;
2350 if (target_smt_mode && target_smt_mode < target_threads)
2351 target_threads = target_smt_mode;
2352 if (vc->num_threads < target_threads)
2353 collect_piggybacks(&core_info, target_threads);
2355 /* Decide on micro-threading (split-core) mode */
2356 subcore_size = threads_per_subcore;
2357 cmd_bit = stat_bit = 0;
2358 split = core_info.n_subcores;
2361 /* threads_per_subcore must be MAX_SMT_THREADS (8) here */
2362 if (split == 2 && (dynamic_mt_modes & 2)) {
2363 cmd_bit = HID0_POWER8_1TO2LPAR;
2364 stat_bit = HID0_POWER8_2LPARMODE;
2367 cmd_bit = HID0_POWER8_1TO4LPAR;
2368 stat_bit = HID0_POWER8_4LPARMODE;
2370 subcore_size = MAX_SMT_THREADS / split;
2372 memset(&split_info, 0, sizeof(split_info));
2373 split_info.rpr = mfspr(SPRN_RPR);
2374 split_info.pmmar = mfspr(SPRN_PMMAR);
2375 split_info.ldbar = mfspr(SPRN_LDBAR);
2376 split_info.subcore_size = subcore_size;
2377 for (sub = 0; sub < core_info.n_subcores; ++sub)
2378 split_info.master_vcs[sub] =
2379 list_first_entry(&core_info.vcs[sub],
2380 struct kvmppc_vcore, preempt_list);
2381 /* order writes to split_info before kvm_split_mode pointer */
2384 pcpu = smp_processor_id();
2385 for (thr = 0; thr < threads_per_subcore; ++thr)
2386 paca[pcpu + thr].kvm_hstate.kvm_split_mode = sip;
2388 /* Initiate micro-threading (split-core) if required */
2390 unsigned long hid0 = mfspr(SPRN_HID0);
2392 hid0 |= cmd_bit | HID0_POWER8_DYNLPARDIS;
2394 mtspr(SPRN_HID0, hid0);
2397 hid0 = mfspr(SPRN_HID0);
2398 if (hid0 & stat_bit)
2404 kvmppc_clear_host_core(pcpu);
2406 /* Start all the threads */
2408 for (sub = 0; sub < core_info.n_subcores; ++sub) {
2409 thr = subcore_thread_map[sub];
2412 list_for_each_entry(pvc, &core_info.vcs[sub], preempt_list) {
2413 pvc->pcpu = pcpu + thr;
2414 for_each_runnable_thread(i, vcpu, pvc) {
2415 kvmppc_start_thread(vcpu, pvc);
2416 kvmppc_create_dtl_entry(vcpu, pvc);
2417 trace_kvm_guest_enter(vcpu);
2418 if (!vcpu->arch.ptid)
2420 active |= 1 << (thr + vcpu->arch.ptid);
2423 * We need to start the first thread of each subcore
2424 * even if it doesn't have a vcpu.
2426 if (pvc->master_vcore == pvc && !thr0_done)
2427 kvmppc_start_thread(NULL, pvc);
2428 thr += pvc->num_threads;
2433 * Ensure that split_info.do_nap is set after setting
2434 * the vcore pointer in the PACA of the secondaries.
2438 split_info.do_nap = 1; /* ask secondaries to nap when done */
2441 * When doing micro-threading, poke the inactive threads as well.
2442 * This gets them to the nap instruction after kvm_do_nap,
2443 * which reduces the time taken to unsplit later.
2446 for (thr = 1; thr < threads_per_subcore; ++thr)
2447 if (!(active & (1 << thr)))
2448 kvmppc_ipi_thread(pcpu + thr);
2450 vc->vcore_state = VCORE_RUNNING;
2453 trace_kvmppc_run_core(vc, 0);
2455 for (sub = 0; sub < core_info.n_subcores; ++sub)
2456 list_for_each_entry(pvc, &core_info.vcs[sub], preempt_list)
2457 spin_unlock(&pvc->lock);
2461 srcu_idx = srcu_read_lock(&vc->kvm->srcu);
2463 __kvmppc_vcore_entry();
2465 srcu_read_unlock(&vc->kvm->srcu, srcu_idx);
2467 spin_lock(&vc->lock);
2468 /* prevent other vcpu threads from doing kvmppc_start_thread() now */
2469 vc->vcore_state = VCORE_EXITING;
2471 /* wait for secondary threads to finish writing their state to memory */
2472 kvmppc_wait_for_nap();
2474 /* Return to whole-core mode if we split the core earlier */
2476 unsigned long hid0 = mfspr(SPRN_HID0);
2477 unsigned long loops = 0;
2479 hid0 &= ~HID0_POWER8_DYNLPARDIS;
2480 stat_bit = HID0_POWER8_2LPARMODE | HID0_POWER8_4LPARMODE;
2482 mtspr(SPRN_HID0, hid0);
2485 hid0 = mfspr(SPRN_HID0);
2486 if (!(hid0 & stat_bit))
2491 split_info.do_nap = 0;
2494 /* Let secondaries go back to the offline loop */
2495 for (i = 0; i < threads_per_subcore; ++i) {
2496 kvmppc_release_hwthread(pcpu + i);
2497 if (sip && sip->napped[i])
2498 kvmppc_ipi_thread(pcpu + i);
2501 kvmppc_set_host_core(pcpu);
2503 spin_unlock(&vc->lock);
2505 /* make sure updates to secondary vcpu structs are visible now */
2509 for (sub = 0; sub < core_info.n_subcores; ++sub)
2510 list_for_each_entry_safe(pvc, vcnext, &core_info.vcs[sub],
2512 post_guest_process(pvc, pvc == vc);
2514 spin_lock(&vc->lock);
2518 vc->vcore_state = VCORE_INACTIVE;
2519 trace_kvmppc_run_core(vc, 1);
2523 * Wait for some other vcpu thread to execute us, and
2524 * wake us up when we need to handle something in the host.
2526 static void kvmppc_wait_for_exec(struct kvmppc_vcore *vc,
2527 struct kvm_vcpu *vcpu, int wait_state)
2531 prepare_to_wait(&vcpu->arch.cpu_run, &wait, wait_state);
2532 if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) {
2533 spin_unlock(&vc->lock);
2535 spin_lock(&vc->lock);
2537 finish_wait(&vcpu->arch.cpu_run, &wait);
2540 static void grow_halt_poll_ns(struct kvmppc_vcore *vc)
2543 if (vc->halt_poll_ns == 0 && halt_poll_ns_grow)
2544 vc->halt_poll_ns = 10000;
2546 vc->halt_poll_ns *= halt_poll_ns_grow;
2548 if (vc->halt_poll_ns > halt_poll_max_ns)
2549 vc->halt_poll_ns = halt_poll_max_ns;
2552 static void shrink_halt_poll_ns(struct kvmppc_vcore *vc)
2554 if (halt_poll_ns_shrink == 0)
2555 vc->halt_poll_ns = 0;
2557 vc->halt_poll_ns /= halt_poll_ns_shrink;
2560 /* Check to see if any of the runnable vcpus on the vcore have pending
2561 * exceptions or are no longer ceded
2563 static int kvmppc_vcore_check_block(struct kvmppc_vcore *vc)
2565 struct kvm_vcpu *vcpu;
2568 for_each_runnable_thread(i, vcpu, vc) {
2569 if (vcpu->arch.pending_exceptions || !vcpu->arch.ceded)
2577 * All the vcpus in this vcore are idle, so wait for a decrementer
2578 * or external interrupt to one of the vcpus. vc->lock is held.
2580 static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc)
2582 ktime_t cur, start_poll, start_wait;
2585 DECLARE_SWAITQUEUE(wait);
2587 /* Poll for pending exceptions and ceded state */
2588 cur = start_poll = ktime_get();
2589 if (vc->halt_poll_ns) {
2590 ktime_t stop = ktime_add_ns(start_poll, vc->halt_poll_ns);
2591 ++vc->runner->stat.halt_attempted_poll;
2593 vc->vcore_state = VCORE_POLLING;
2594 spin_unlock(&vc->lock);
2597 if (kvmppc_vcore_check_block(vc)) {
2602 } while (single_task_running() && ktime_before(cur, stop));
2604 spin_lock(&vc->lock);
2605 vc->vcore_state = VCORE_INACTIVE;
2608 ++vc->runner->stat.halt_successful_poll;
2613 prepare_to_swait(&vc->wq, &wait, TASK_INTERRUPTIBLE);
2615 if (kvmppc_vcore_check_block(vc)) {
2616 finish_swait(&vc->wq, &wait);
2618 /* If we polled, count this as a successful poll */
2619 if (vc->halt_poll_ns)
2620 ++vc->runner->stat.halt_successful_poll;
2624 start_wait = ktime_get();
2626 vc->vcore_state = VCORE_SLEEPING;
2627 trace_kvmppc_vcore_blocked(vc, 0);
2628 spin_unlock(&vc->lock);
2630 finish_swait(&vc->wq, &wait);
2631 spin_lock(&vc->lock);
2632 vc->vcore_state = VCORE_INACTIVE;
2633 trace_kvmppc_vcore_blocked(vc, 1);
2634 ++vc->runner->stat.halt_successful_wait;
2639 block_ns = ktime_to_ns(cur) - ktime_to_ns(start_poll);
2641 /* Attribute wait time */
2643 vc->runner->stat.halt_wait_ns +=
2644 ktime_to_ns(cur) - ktime_to_ns(start_wait);
2645 /* Attribute failed poll time */
2646 if (vc->halt_poll_ns)
2647 vc->runner->stat.halt_poll_fail_ns +=
2648 ktime_to_ns(start_wait) -
2649 ktime_to_ns(start_poll);
2651 /* Attribute successful poll time */
2652 if (vc->halt_poll_ns)
2653 vc->runner->stat.halt_poll_success_ns +=
2655 ktime_to_ns(start_poll);
2658 /* Adjust poll time */
2659 if (halt_poll_max_ns) {
2660 if (block_ns <= vc->halt_poll_ns)
2662 /* We slept and blocked for longer than the max halt time */
2663 else if (vc->halt_poll_ns && block_ns > halt_poll_max_ns)
2664 shrink_halt_poll_ns(vc);
2665 /* We slept and our poll time is too small */
2666 else if (vc->halt_poll_ns < halt_poll_max_ns &&
2667 block_ns < halt_poll_max_ns)
2668 grow_halt_poll_ns(vc);
2670 vc->halt_poll_ns = 0;
2672 trace_kvmppc_vcore_wakeup(do_sleep, block_ns);
2675 static int kvmppc_run_vcpu(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
2678 struct kvmppc_vcore *vc;
2681 trace_kvmppc_run_vcpu_enter(vcpu);
2683 kvm_run->exit_reason = 0;
2684 vcpu->arch.ret = RESUME_GUEST;
2685 vcpu->arch.trap = 0;
2686 kvmppc_update_vpas(vcpu);
2689 * Synchronize with other threads in this virtual core
2691 vc = vcpu->arch.vcore;
2692 spin_lock(&vc->lock);
2693 vcpu->arch.ceded = 0;
2694 vcpu->arch.run_task = current;
2695 vcpu->arch.kvm_run = kvm_run;
2696 vcpu->arch.stolen_logged = vcore_stolen_time(vc, mftb());
2697 vcpu->arch.state = KVMPPC_VCPU_RUNNABLE;
2698 vcpu->arch.busy_preempt = TB_NIL;
2699 WRITE_ONCE(vc->runnable_threads[vcpu->arch.ptid], vcpu);
2703 * This happens the first time this is called for a vcpu.
2704 * If the vcore is already running, we may be able to start
2705 * this thread straight away and have it join in.
2707 if (!signal_pending(current)) {
2708 if (vc->vcore_state == VCORE_PIGGYBACK) {
2709 struct kvmppc_vcore *mvc = vc->master_vcore;
2710 if (spin_trylock(&mvc->lock)) {
2711 if (mvc->vcore_state == VCORE_RUNNING &&
2712 !VCORE_IS_EXITING(mvc)) {
2713 kvmppc_create_dtl_entry(vcpu, vc);
2714 kvmppc_start_thread(vcpu, vc);
2715 trace_kvm_guest_enter(vcpu);
2717 spin_unlock(&mvc->lock);
2719 } else if (vc->vcore_state == VCORE_RUNNING &&
2720 !VCORE_IS_EXITING(vc)) {
2721 kvmppc_create_dtl_entry(vcpu, vc);
2722 kvmppc_start_thread(vcpu, vc);
2723 trace_kvm_guest_enter(vcpu);
2724 } else if (vc->vcore_state == VCORE_SLEEPING) {
2730 while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE &&
2731 !signal_pending(current)) {
2732 if (vc->vcore_state == VCORE_PREEMPT && vc->runner == NULL)
2733 kvmppc_vcore_end_preempt(vc);
2735 if (vc->vcore_state != VCORE_INACTIVE) {
2736 kvmppc_wait_for_exec(vc, vcpu, TASK_INTERRUPTIBLE);
2739 for_each_runnable_thread(i, v, vc) {
2740 kvmppc_core_prepare_to_enter(v);
2741 if (signal_pending(v->arch.run_task)) {
2742 kvmppc_remove_runnable(vc, v);
2743 v->stat.signal_exits++;
2744 v->arch.kvm_run->exit_reason = KVM_EXIT_INTR;
2745 v->arch.ret = -EINTR;
2746 wake_up(&v->arch.cpu_run);
2749 if (!vc->n_runnable || vcpu->arch.state != KVMPPC_VCPU_RUNNABLE)
2752 for_each_runnable_thread(i, v, vc) {
2753 if (!v->arch.pending_exceptions)
2754 n_ceded += v->arch.ceded;
2759 if (n_ceded == vc->n_runnable) {
2760 kvmppc_vcore_blocked(vc);
2761 } else if (need_resched()) {
2762 kvmppc_vcore_preempt(vc);
2763 /* Let something else run */
2764 cond_resched_lock(&vc->lock);
2765 if (vc->vcore_state == VCORE_PREEMPT)
2766 kvmppc_vcore_end_preempt(vc);
2768 kvmppc_run_core(vc);
2773 while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE &&
2774 (vc->vcore_state == VCORE_RUNNING ||
2775 vc->vcore_state == VCORE_EXITING ||
2776 vc->vcore_state == VCORE_PIGGYBACK))
2777 kvmppc_wait_for_exec(vc, vcpu, TASK_UNINTERRUPTIBLE);
2779 if (vc->vcore_state == VCORE_PREEMPT && vc->runner == NULL)
2780 kvmppc_vcore_end_preempt(vc);
2782 if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) {
2783 kvmppc_remove_runnable(vc, vcpu);
2784 vcpu->stat.signal_exits++;
2785 kvm_run->exit_reason = KVM_EXIT_INTR;
2786 vcpu->arch.ret = -EINTR;
2789 if (vc->n_runnable && vc->vcore_state == VCORE_INACTIVE) {
2790 /* Wake up some vcpu to run the core */
2792 v = next_runnable_thread(vc, &i);
2793 wake_up(&v->arch.cpu_run);
2796 trace_kvmppc_run_vcpu_exit(vcpu, kvm_run);
2797 spin_unlock(&vc->lock);
2798 return vcpu->arch.ret;
2801 static int kvmppc_vcpu_run_hv(struct kvm_run *run, struct kvm_vcpu *vcpu)
2805 unsigned long ebb_regs[3] = {}; /* shut up GCC */
2806 unsigned long user_tar = 0;
2807 unsigned int user_vrsave;
2809 if (!vcpu->arch.sane) {
2810 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
2815 * Don't allow entry with a suspended transaction, because
2816 * the guest entry/exit code will lose it.
2817 * If the guest has TM enabled, save away their TM-related SPRs
2818 * (they will get restored by the TM unavailable interrupt).
2820 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
2821 if (cpu_has_feature(CPU_FTR_TM) && current->thread.regs &&
2822 (current->thread.regs->msr & MSR_TM)) {
2823 if (MSR_TM_ACTIVE(current->thread.regs->msr)) {
2824 run->exit_reason = KVM_EXIT_FAIL_ENTRY;
2825 run->fail_entry.hardware_entry_failure_reason = 0;
2828 /* Enable TM so we can read the TM SPRs */
2829 mtmsr(mfmsr() | MSR_TM);
2830 current->thread.tm_tfhar = mfspr(SPRN_TFHAR);
2831 current->thread.tm_tfiar = mfspr(SPRN_TFIAR);
2832 current->thread.tm_texasr = mfspr(SPRN_TEXASR);
2833 current->thread.regs->msr &= ~MSR_TM;
2837 kvmppc_core_prepare_to_enter(vcpu);
2839 /* No need to go into the guest when all we'll do is come back out */
2840 if (signal_pending(current)) {
2841 run->exit_reason = KVM_EXIT_INTR;
2845 atomic_inc(&vcpu->kvm->arch.vcpus_running);
2846 /* Order vcpus_running vs. hpte_setup_done, see kvmppc_alloc_reset_hpt */
2849 /* On the first time here, set up HTAB and VRMA */
2850 if (!vcpu->kvm->arch.hpte_setup_done) {
2851 r = kvmppc_hv_setup_htab_rma(vcpu);
2856 flush_all_to_thread(current);
2858 /* Save userspace EBB and other register values */
2859 if (cpu_has_feature(CPU_FTR_ARCH_207S)) {
2860 ebb_regs[0] = mfspr(SPRN_EBBHR);
2861 ebb_regs[1] = mfspr(SPRN_EBBRR);
2862 ebb_regs[2] = mfspr(SPRN_BESCR);
2863 user_tar = mfspr(SPRN_TAR);
2865 user_vrsave = mfspr(SPRN_VRSAVE);
2867 vcpu->arch.wqp = &vcpu->arch.vcore->wq;
2868 vcpu->arch.pgdir = current->mm->pgd;
2869 vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST;
2872 r = kvmppc_run_vcpu(run, vcpu);
2874 if (run->exit_reason == KVM_EXIT_PAPR_HCALL &&
2875 !(vcpu->arch.shregs.msr & MSR_PR)) {
2876 trace_kvm_hcall_enter(vcpu);
2877 r = kvmppc_pseries_do_hcall(vcpu);
2878 trace_kvm_hcall_exit(vcpu, r);
2879 kvmppc_core_prepare_to_enter(vcpu);
2880 } else if (r == RESUME_PAGE_FAULT) {
2881 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
2882 r = kvmppc_book3s_hv_page_fault(run, vcpu,
2883 vcpu->arch.fault_dar, vcpu->arch.fault_dsisr);
2884 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
2885 } else if (r == RESUME_PASSTHROUGH)
2886 r = kvmppc_xics_rm_complete(vcpu, 0);
2887 } while (is_kvmppc_resume_guest(r));
2889 /* Restore userspace EBB and other register values */
2890 if (cpu_has_feature(CPU_FTR_ARCH_207S)) {
2891 mtspr(SPRN_EBBHR, ebb_regs[0]);
2892 mtspr(SPRN_EBBRR, ebb_regs[1]);
2893 mtspr(SPRN_BESCR, ebb_regs[2]);
2894 mtspr(SPRN_TAR, user_tar);
2895 mtspr(SPRN_FSCR, current->thread.fscr);
2897 mtspr(SPRN_VRSAVE, user_vrsave);
2900 vcpu->arch.state = KVMPPC_VCPU_NOTREADY;
2901 atomic_dec(&vcpu->kvm->arch.vcpus_running);
2905 static void kvmppc_add_seg_page_size(struct kvm_ppc_one_seg_page_size **sps,
2908 struct mmu_psize_def *def = &mmu_psize_defs[linux_psize];
2912 (*sps)->page_shift = def->shift;
2913 (*sps)->slb_enc = def->sllp;
2914 (*sps)->enc[0].page_shift = def->shift;
2915 (*sps)->enc[0].pte_enc = def->penc[linux_psize];
2917 * Add 16MB MPSS support if host supports it
2919 if (linux_psize != MMU_PAGE_16M && def->penc[MMU_PAGE_16M] != -1) {
2920 (*sps)->enc[1].page_shift = 24;
2921 (*sps)->enc[1].pte_enc = def->penc[MMU_PAGE_16M];
2926 static int kvm_vm_ioctl_get_smmu_info_hv(struct kvm *kvm,
2927 struct kvm_ppc_smmu_info *info)
2929 struct kvm_ppc_one_seg_page_size *sps;
2931 info->flags = KVM_PPC_PAGE_SIZES_REAL;
2932 if (mmu_has_feature(MMU_FTR_1T_SEGMENT))
2933 info->flags |= KVM_PPC_1T_SEGMENTS;
2934 info->slb_size = mmu_slb_size;
2936 /* We only support these sizes for now, and no muti-size segments */
2937 sps = &info->sps[0];
2938 kvmppc_add_seg_page_size(&sps, MMU_PAGE_4K);
2939 kvmppc_add_seg_page_size(&sps, MMU_PAGE_64K);
2940 kvmppc_add_seg_page_size(&sps, MMU_PAGE_16M);
2946 * Get (and clear) the dirty memory log for a memory slot.
2948 static int kvm_vm_ioctl_get_dirty_log_hv(struct kvm *kvm,
2949 struct kvm_dirty_log *log)
2951 struct kvm_memslots *slots;
2952 struct kvm_memory_slot *memslot;
2956 mutex_lock(&kvm->slots_lock);
2959 if (log->slot >= KVM_USER_MEM_SLOTS)
2962 slots = kvm_memslots(kvm);
2963 memslot = id_to_memslot(slots, log->slot);
2965 if (!memslot->dirty_bitmap)
2968 n = kvm_dirty_bitmap_bytes(memslot);
2969 memset(memslot->dirty_bitmap, 0, n);
2971 r = kvmppc_hv_get_dirty_log(kvm, memslot, memslot->dirty_bitmap);
2976 if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n))
2981 mutex_unlock(&kvm->slots_lock);
2985 static void kvmppc_core_free_memslot_hv(struct kvm_memory_slot *free,
2986 struct kvm_memory_slot *dont)
2988 if (!dont || free->arch.rmap != dont->arch.rmap) {
2989 vfree(free->arch.rmap);
2990 free->arch.rmap = NULL;
2994 static int kvmppc_core_create_memslot_hv(struct kvm_memory_slot *slot,
2995 unsigned long npages)
2997 slot->arch.rmap = vzalloc(npages * sizeof(*slot->arch.rmap));
2998 if (!slot->arch.rmap)
3004 static int kvmppc_core_prepare_memory_region_hv(struct kvm *kvm,
3005 struct kvm_memory_slot *memslot,
3006 const struct kvm_userspace_memory_region *mem)
3011 static void kvmppc_core_commit_memory_region_hv(struct kvm *kvm,
3012 const struct kvm_userspace_memory_region *mem,
3013 const struct kvm_memory_slot *old,
3014 const struct kvm_memory_slot *new)
3016 unsigned long npages = mem->memory_size >> PAGE_SHIFT;
3017 struct kvm_memslots *slots;
3018 struct kvm_memory_slot *memslot;
3020 if (npages && old->npages) {
3022 * If modifying a memslot, reset all the rmap dirty bits.
3023 * If this is a new memslot, we don't need to do anything
3024 * since the rmap array starts out as all zeroes,
3025 * i.e. no pages are dirty.
3027 slots = kvm_memslots(kvm);
3028 memslot = id_to_memslot(slots, mem->slot);
3029 kvmppc_hv_get_dirty_log(kvm, memslot, NULL);
3034 * Update LPCR values in kvm->arch and in vcores.
3035 * Caller must hold kvm->lock.
3037 void kvmppc_update_lpcr(struct kvm *kvm, unsigned long lpcr, unsigned long mask)
3042 if ((kvm->arch.lpcr & mask) == lpcr)
3045 kvm->arch.lpcr = (kvm->arch.lpcr & ~mask) | lpcr;
3047 for (i = 0; i < KVM_MAX_VCORES; ++i) {
3048 struct kvmppc_vcore *vc = kvm->arch.vcores[i];
3051 spin_lock(&vc->lock);
3052 vc->lpcr = (vc->lpcr & ~mask) | lpcr;
3053 spin_unlock(&vc->lock);
3054 if (++cores_done >= kvm->arch.online_vcores)
3059 static void kvmppc_mmu_destroy_hv(struct kvm_vcpu *vcpu)
3064 static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu)
3067 struct kvm *kvm = vcpu->kvm;
3069 struct kvm_memory_slot *memslot;
3070 struct vm_area_struct *vma;
3071 unsigned long lpcr = 0, senc;
3072 unsigned long psize, porder;
3075 mutex_lock(&kvm->lock);
3076 if (kvm->arch.hpte_setup_done)
3077 goto out; /* another vcpu beat us to it */
3079 /* Allocate hashed page table (if not done already) and reset it */
3080 if (!kvm->arch.hpt_virt) {
3081 err = kvmppc_alloc_hpt(kvm, NULL);
3083 pr_err("KVM: Couldn't alloc HPT\n");
3088 /* Look up the memslot for guest physical address 0 */
3089 srcu_idx = srcu_read_lock(&kvm->srcu);
3090 memslot = gfn_to_memslot(kvm, 0);
3092 /* We must have some memory at 0 by now */
3094 if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID))
3097 /* Look up the VMA for the start of this memory slot */
3098 hva = memslot->userspace_addr;
3099 down_read(¤t->mm->mmap_sem);
3100 vma = find_vma(current->mm, hva);
3101 if (!vma || vma->vm_start > hva || (vma->vm_flags & VM_IO))
3104 psize = vma_kernel_pagesize(vma);
3106 up_read(¤t->mm->mmap_sem);
3108 /* We can handle 4k, 64k or 16M pages in the VRMA */
3109 if (psize >= 0x1000000)
3111 else if (psize >= 0x10000)
3115 porder = __ilog2(psize);
3117 /* Update VRMASD field in the LPCR */
3118 senc = slb_pgsize_encoding(psize);
3119 kvm->arch.vrma_slb_v = senc | SLB_VSID_B_1T |
3120 (VRMA_VSID << SLB_VSID_SHIFT_1T);
3121 /* the -4 is to account for senc values starting at 0x10 */
3122 lpcr = senc << (LPCR_VRMASD_SH - 4);
3124 /* Create HPTEs in the hash page table for the VRMA */
3125 kvmppc_map_vrma(vcpu, memslot, porder);
3127 kvmppc_update_lpcr(kvm, lpcr, LPCR_VRMASD);
3129 /* Order updates to kvm->arch.lpcr etc. vs. hpte_setup_done */
3131 kvm->arch.hpte_setup_done = 1;
3134 srcu_read_unlock(&kvm->srcu, srcu_idx);
3136 mutex_unlock(&kvm->lock);
3140 up_read(¤t->mm->mmap_sem);
3144 #ifdef CONFIG_KVM_XICS
3145 static int kvmppc_cpu_notify(struct notifier_block *self, unsigned long action,
3148 unsigned long cpu = (long)hcpu;
3151 case CPU_UP_PREPARE:
3152 case CPU_UP_PREPARE_FROZEN:
3153 kvmppc_set_host_core(cpu);
3156 #ifdef CONFIG_HOTPLUG_CPU
3158 case CPU_DEAD_FROZEN:
3159 case CPU_UP_CANCELED:
3160 case CPU_UP_CANCELED_FROZEN:
3161 kvmppc_clear_host_core(cpu);
3171 static struct notifier_block kvmppc_cpu_notifier = {
3172 .notifier_call = kvmppc_cpu_notify,
3176 * Allocate a per-core structure for managing state about which cores are
3177 * running in the host versus the guest and for exchanging data between
3178 * real mode KVM and CPU running in the host.
3179 * This is only done for the first VM.
3180 * The allocated structure stays even if all VMs have stopped.
3181 * It is only freed when the kvm-hv module is unloaded.
3182 * It's OK for this routine to fail, we just don't support host
3183 * core operations like redirecting H_IPI wakeups.
3185 void kvmppc_alloc_host_rm_ops(void)
3187 struct kvmppc_host_rm_ops *ops;
3188 unsigned long l_ops;
3192 /* Not the first time here ? */
3193 if (kvmppc_host_rm_ops_hv != NULL)
3196 ops = kzalloc(sizeof(struct kvmppc_host_rm_ops), GFP_KERNEL);
3200 size = cpu_nr_cores() * sizeof(struct kvmppc_host_rm_core);
3201 ops->rm_core = kzalloc(size, GFP_KERNEL);
3203 if (!ops->rm_core) {
3210 for (cpu = 0; cpu < nr_cpu_ids; cpu += threads_per_core) {
3211 if (!cpu_online(cpu))
3214 core = cpu >> threads_shift;
3215 ops->rm_core[core].rm_state.in_host = 1;
3218 ops->vcpu_kick = kvmppc_fast_vcpu_kick_hv;
3221 * Make the contents of the kvmppc_host_rm_ops structure visible
3222 * to other CPUs before we assign it to the global variable.
3223 * Do an atomic assignment (no locks used here), but if someone
3224 * beats us to it, just free our copy and return.
3227 l_ops = (unsigned long) ops;
3229 if (cmpxchg64((unsigned long *)&kvmppc_host_rm_ops_hv, 0, l_ops)) {
3231 kfree(ops->rm_core);
3236 register_cpu_notifier(&kvmppc_cpu_notifier);
3241 void kvmppc_free_host_rm_ops(void)
3243 if (kvmppc_host_rm_ops_hv) {
3244 unregister_cpu_notifier(&kvmppc_cpu_notifier);
3245 kfree(kvmppc_host_rm_ops_hv->rm_core);
3246 kfree(kvmppc_host_rm_ops_hv);
3247 kvmppc_host_rm_ops_hv = NULL;
3252 static int kvmppc_core_init_vm_hv(struct kvm *kvm)
3254 unsigned long lpcr, lpid;
3257 /* Allocate the guest's logical partition ID */
3259 lpid = kvmppc_alloc_lpid();
3262 kvm->arch.lpid = lpid;
3264 kvmppc_alloc_host_rm_ops();
3267 * Since we don't flush the TLB when tearing down a VM,
3268 * and this lpid might have previously been used,
3269 * make sure we flush on each core before running the new VM.
3271 cpumask_setall(&kvm->arch.need_tlb_flush);
3273 /* Start out with the default set of hcalls enabled */
3274 memcpy(kvm->arch.enabled_hcalls, default_enabled_hcalls,
3275 sizeof(kvm->arch.enabled_hcalls));
3277 kvm->arch.host_sdr1 = mfspr(SPRN_SDR1);
3279 /* Init LPCR for virtual RMA mode */
3280 kvm->arch.host_lpid = mfspr(SPRN_LPID);
3281 kvm->arch.host_lpcr = lpcr = mfspr(SPRN_LPCR);
3282 lpcr &= LPCR_PECE | LPCR_LPES;
3283 lpcr |= (4UL << LPCR_DPFD_SH) | LPCR_HDICE |
3284 LPCR_VPM0 | LPCR_VPM1;
3285 kvm->arch.vrma_slb_v = SLB_VSID_B_1T |
3286 (VRMA_VSID << SLB_VSID_SHIFT_1T);
3287 /* On POWER8 turn on online bit to enable PURR/SPURR */
3288 if (cpu_has_feature(CPU_FTR_ARCH_207S))
3290 kvm->arch.lpcr = lpcr;
3293 * Track that we now have a HV mode VM active. This blocks secondary
3294 * CPU threads from coming online.
3296 kvm_hv_vm_activated();
3299 * Create a debugfs directory for the VM
3301 snprintf(buf, sizeof(buf), "vm%d", current->pid);
3302 kvm->arch.debugfs_dir = debugfs_create_dir(buf, kvm_debugfs_dir);
3303 if (!IS_ERR_OR_NULL(kvm->arch.debugfs_dir))
3304 kvmppc_mmu_debugfs_init(kvm);
3309 static void kvmppc_free_vcores(struct kvm *kvm)
3313 for (i = 0; i < KVM_MAX_VCORES; ++i)
3314 kfree(kvm->arch.vcores[i]);
3315 kvm->arch.online_vcores = 0;
3318 static void kvmppc_core_destroy_vm_hv(struct kvm *kvm)
3320 debugfs_remove_recursive(kvm->arch.debugfs_dir);
3322 kvm_hv_vm_deactivated();
3324 kvmppc_free_vcores(kvm);
3326 kvmppc_free_hpt(kvm);
3328 kvmppc_free_pimap(kvm);
3331 /* We don't need to emulate any privileged instructions or dcbz */
3332 static int kvmppc_core_emulate_op_hv(struct kvm_run *run, struct kvm_vcpu *vcpu,
3333 unsigned int inst, int *advance)
3335 return EMULATE_FAIL;
3338 static int kvmppc_core_emulate_mtspr_hv(struct kvm_vcpu *vcpu, int sprn,
3341 return EMULATE_FAIL;
3344 static int kvmppc_core_emulate_mfspr_hv(struct kvm_vcpu *vcpu, int sprn,
3347 return EMULATE_FAIL;
3350 static int kvmppc_core_check_processor_compat_hv(void)
3352 if (!cpu_has_feature(CPU_FTR_HVMODE) ||
3353 !cpu_has_feature(CPU_FTR_ARCH_206))
3356 * Disable KVM for Power9, untill the required bits merged.
3358 if (cpu_has_feature(CPU_FTR_ARCH_300))
3364 #ifdef CONFIG_KVM_XICS
3366 void kvmppc_free_pimap(struct kvm *kvm)
3368 kfree(kvm->arch.pimap);
3371 static struct kvmppc_passthru_irqmap *kvmppc_alloc_pimap(void)
3373 return kzalloc(sizeof(struct kvmppc_passthru_irqmap), GFP_KERNEL);
3376 static int kvmppc_set_passthru_irq(struct kvm *kvm, int host_irq, int guest_gsi)
3378 struct irq_desc *desc;
3379 struct kvmppc_irq_map *irq_map;
3380 struct kvmppc_passthru_irqmap *pimap;
3381 struct irq_chip *chip;
3384 if (!kvm_irq_bypass)
3387 desc = irq_to_desc(host_irq);
3391 mutex_lock(&kvm->lock);
3393 pimap = kvm->arch.pimap;
3394 if (pimap == NULL) {
3395 /* First call, allocate structure to hold IRQ map */
3396 pimap = kvmppc_alloc_pimap();
3397 if (pimap == NULL) {
3398 mutex_unlock(&kvm->lock);
3401 kvm->arch.pimap = pimap;
3405 * For now, we only support interrupts for which the EOI operation
3406 * is an OPAL call followed by a write to XIRR, since that's
3407 * what our real-mode EOI code does.
3409 chip = irq_data_get_irq_chip(&desc->irq_data);
3410 if (!chip || !is_pnv_opal_msi(chip)) {
3411 pr_warn("kvmppc_set_passthru_irq_hv: Could not assign IRQ map for (%d,%d)\n",
3412 host_irq, guest_gsi);
3413 mutex_unlock(&kvm->lock);
3418 * See if we already have an entry for this guest IRQ number.
3419 * If it's mapped to a hardware IRQ number, that's an error,
3420 * otherwise re-use this entry.
3422 for (i = 0; i < pimap->n_mapped; i++) {
3423 if (guest_gsi == pimap->mapped[i].v_hwirq) {
3424 if (pimap->mapped[i].r_hwirq) {
3425 mutex_unlock(&kvm->lock);
3432 if (i == KVMPPC_PIRQ_MAPPED) {
3433 mutex_unlock(&kvm->lock);
3434 return -EAGAIN; /* table is full */
3437 irq_map = &pimap->mapped[i];
3439 irq_map->v_hwirq = guest_gsi;
3440 irq_map->desc = desc;
3443 * Order the above two stores before the next to serialize with
3444 * the KVM real mode handler.
3447 irq_map->r_hwirq = desc->irq_data.hwirq;
3449 if (i == pimap->n_mapped)
3452 kvmppc_xics_set_mapped(kvm, guest_gsi, desc->irq_data.hwirq);
3454 mutex_unlock(&kvm->lock);
3459 static int kvmppc_clr_passthru_irq(struct kvm *kvm, int host_irq, int guest_gsi)
3461 struct irq_desc *desc;
3462 struct kvmppc_passthru_irqmap *pimap;
3465 if (!kvm_irq_bypass)
3468 desc = irq_to_desc(host_irq);
3472 mutex_lock(&kvm->lock);
3474 if (kvm->arch.pimap == NULL) {
3475 mutex_unlock(&kvm->lock);
3478 pimap = kvm->arch.pimap;
3480 for (i = 0; i < pimap->n_mapped; i++) {
3481 if (guest_gsi == pimap->mapped[i].v_hwirq)
3485 if (i == pimap->n_mapped) {
3486 mutex_unlock(&kvm->lock);
3490 kvmppc_xics_clr_mapped(kvm, guest_gsi, pimap->mapped[i].r_hwirq);
3492 /* invalidate the entry */
3493 pimap->mapped[i].r_hwirq = 0;
3496 * We don't free this structure even when the count goes to
3497 * zero. The structure is freed when we destroy the VM.
3500 mutex_unlock(&kvm->lock);
3504 static int kvmppc_irq_bypass_add_producer_hv(struct irq_bypass_consumer *cons,
3505 struct irq_bypass_producer *prod)
3508 struct kvm_kernel_irqfd *irqfd =
3509 container_of(cons, struct kvm_kernel_irqfd, consumer);
3511 irqfd->producer = prod;
3513 ret = kvmppc_set_passthru_irq(irqfd->kvm, prod->irq, irqfd->gsi);
3515 pr_info("kvmppc_set_passthru_irq (irq %d, gsi %d) fails: %d\n",
3516 prod->irq, irqfd->gsi, ret);
3521 static void kvmppc_irq_bypass_del_producer_hv(struct irq_bypass_consumer *cons,
3522 struct irq_bypass_producer *prod)
3525 struct kvm_kernel_irqfd *irqfd =
3526 container_of(cons, struct kvm_kernel_irqfd, consumer);
3528 irqfd->producer = NULL;
3531 * When producer of consumer is unregistered, we change back to
3532 * default external interrupt handling mode - KVM real mode
3533 * will switch back to host.
3535 ret = kvmppc_clr_passthru_irq(irqfd->kvm, prod->irq, irqfd->gsi);
3537 pr_warn("kvmppc_clr_passthru_irq (irq %d, gsi %d) fails: %d\n",
3538 prod->irq, irqfd->gsi, ret);
3542 static long kvm_arch_vm_ioctl_hv(struct file *filp,
3543 unsigned int ioctl, unsigned long arg)
3545 struct kvm *kvm __maybe_unused = filp->private_data;
3546 void __user *argp = (void __user *)arg;
3551 case KVM_PPC_ALLOCATE_HTAB: {
3555 if (get_user(htab_order, (u32 __user *)argp))
3557 r = kvmppc_alloc_reset_hpt(kvm, &htab_order);
3561 if (put_user(htab_order, (u32 __user *)argp))
3567 case KVM_PPC_GET_HTAB_FD: {
3568 struct kvm_get_htab_fd ghf;
3571 if (copy_from_user(&ghf, argp, sizeof(ghf)))
3573 r = kvm_vm_ioctl_get_htab_fd(kvm, &ghf);
3585 * List of hcall numbers to enable by default.
3586 * For compatibility with old userspace, we enable by default
3587 * all hcalls that were implemented before the hcall-enabling
3588 * facility was added. Note this list should not include H_RTAS.
3590 static unsigned int default_hcall_list[] = {
3604 #ifdef CONFIG_KVM_XICS
3615 static void init_default_hcalls(void)
3620 for (i = 0; default_hcall_list[i]; ++i) {
3621 hcall = default_hcall_list[i];
3622 WARN_ON(!kvmppc_hcall_impl_hv(hcall));
3623 __set_bit(hcall / 4, default_enabled_hcalls);
3627 static struct kvmppc_ops kvm_ops_hv = {
3628 .get_sregs = kvm_arch_vcpu_ioctl_get_sregs_hv,
3629 .set_sregs = kvm_arch_vcpu_ioctl_set_sregs_hv,
3630 .get_one_reg = kvmppc_get_one_reg_hv,
3631 .set_one_reg = kvmppc_set_one_reg_hv,
3632 .vcpu_load = kvmppc_core_vcpu_load_hv,
3633 .vcpu_put = kvmppc_core_vcpu_put_hv,
3634 .set_msr = kvmppc_set_msr_hv,
3635 .vcpu_run = kvmppc_vcpu_run_hv,
3636 .vcpu_create = kvmppc_core_vcpu_create_hv,
3637 .vcpu_free = kvmppc_core_vcpu_free_hv,
3638 .check_requests = kvmppc_core_check_requests_hv,
3639 .get_dirty_log = kvm_vm_ioctl_get_dirty_log_hv,
3640 .flush_memslot = kvmppc_core_flush_memslot_hv,
3641 .prepare_memory_region = kvmppc_core_prepare_memory_region_hv,
3642 .commit_memory_region = kvmppc_core_commit_memory_region_hv,
3643 .unmap_hva = kvm_unmap_hva_hv,
3644 .unmap_hva_range = kvm_unmap_hva_range_hv,
3645 .age_hva = kvm_age_hva_hv,
3646 .test_age_hva = kvm_test_age_hva_hv,
3647 .set_spte_hva = kvm_set_spte_hva_hv,
3648 .mmu_destroy = kvmppc_mmu_destroy_hv,
3649 .free_memslot = kvmppc_core_free_memslot_hv,
3650 .create_memslot = kvmppc_core_create_memslot_hv,
3651 .init_vm = kvmppc_core_init_vm_hv,
3652 .destroy_vm = kvmppc_core_destroy_vm_hv,
3653 .get_smmu_info = kvm_vm_ioctl_get_smmu_info_hv,
3654 .emulate_op = kvmppc_core_emulate_op_hv,
3655 .emulate_mtspr = kvmppc_core_emulate_mtspr_hv,
3656 .emulate_mfspr = kvmppc_core_emulate_mfspr_hv,
3657 .fast_vcpu_kick = kvmppc_fast_vcpu_kick_hv,
3658 .arch_vm_ioctl = kvm_arch_vm_ioctl_hv,
3659 .hcall_implemented = kvmppc_hcall_impl_hv,
3660 #ifdef CONFIG_KVM_XICS
3661 .irq_bypass_add_producer = kvmppc_irq_bypass_add_producer_hv,
3662 .irq_bypass_del_producer = kvmppc_irq_bypass_del_producer_hv,
3666 static int kvm_init_subcore_bitmap(void)
3669 int nr_cores = cpu_nr_cores();
3670 struct sibling_subcore_state *sibling_subcore_state;
3672 for (i = 0; i < nr_cores; i++) {
3673 int first_cpu = i * threads_per_core;
3674 int node = cpu_to_node(first_cpu);
3676 /* Ignore if it is already allocated. */
3677 if (paca[first_cpu].sibling_subcore_state)
3680 sibling_subcore_state =
3681 kmalloc_node(sizeof(struct sibling_subcore_state),
3683 if (!sibling_subcore_state)
3686 memset(sibling_subcore_state, 0,
3687 sizeof(struct sibling_subcore_state));
3689 for (j = 0; j < threads_per_core; j++) {
3690 int cpu = first_cpu + j;
3692 paca[cpu].sibling_subcore_state = sibling_subcore_state;
3698 static int kvmppc_book3s_init_hv(void)
3702 * FIXME!! Do we need to check on all cpus ?
3704 r = kvmppc_core_check_processor_compat_hv();
3708 r = kvm_init_subcore_bitmap();
3712 kvm_ops_hv.owner = THIS_MODULE;
3713 kvmppc_hv_ops = &kvm_ops_hv;
3715 init_default_hcalls();
3719 r = kvmppc_mmu_hv_init();
3723 static void kvmppc_book3s_exit_hv(void)
3725 kvmppc_free_host_rm_ops();
3726 kvmppc_hv_ops = NULL;
3729 module_init(kvmppc_book3s_init_hv);
3730 module_exit(kvmppc_book3s_exit_hv);
3731 MODULE_LICENSE("GPL");
3732 MODULE_ALIAS_MISCDEV(KVM_MINOR);
3733 MODULE_ALIAS("devname:kvm");