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>
55 #include <linux/gfp.h>
56 #include <linux/vmalloc.h>
57 #include <linux/highmem.h>
58 #include <linux/hugetlb.h>
59 #include <linux/module.h>
63 #define CREATE_TRACE_POINTS
66 /* #define EXIT_DEBUG */
67 /* #define EXIT_DEBUG_SIMPLE */
68 /* #define EXIT_DEBUG_INT */
70 /* Used to indicate that a guest page fault needs to be handled */
71 #define RESUME_PAGE_FAULT (RESUME_GUEST | RESUME_FLAG_ARCH1)
73 /* Used as a "null" value for timebase values */
74 #define TB_NIL (~(u64)0)
76 static DECLARE_BITMAP(default_enabled_hcalls
, MAX_HCALL_OPCODE
/4 + 1);
78 static int dynamic_mt_modes
= 6;
79 module_param(dynamic_mt_modes
, int, S_IRUGO
| S_IWUSR
);
80 MODULE_PARM_DESC(dynamic_mt_modes
, "Set of allowed dynamic micro-threading modes: 0 (= none), 2, 4, or 6 (= 2 or 4)");
81 static int target_smt_mode
;
82 module_param(target_smt_mode
, int, S_IRUGO
| S_IWUSR
);
83 MODULE_PARM_DESC(target_smt_mode
, "Target threads per core (0 = max)");
85 #ifdef CONFIG_KVM_XICS
86 static struct kernel_param_ops module_param_ops
= {
91 module_param_cb(h_ipi_redirect
, &module_param_ops
, &h_ipi_redirect
,
93 MODULE_PARM_DESC(h_ipi_redirect
, "Redirect H_IPI wakeup to a free host core");
96 static void kvmppc_end_cede(struct kvm_vcpu
*vcpu
);
97 static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu
*vcpu
);
99 static bool kvmppc_ipi_thread(int cpu
)
101 /* On POWER8 for IPIs to threads in the same core, use msgsnd */
102 if (cpu_has_feature(CPU_FTR_ARCH_207S
)) {
104 if (cpu_first_thread_sibling(cpu
) ==
105 cpu_first_thread_sibling(smp_processor_id())) {
106 unsigned long msg
= PPC_DBELL_TYPE(PPC_DBELL_SERVER
);
107 msg
|= cpu_thread_in_core(cpu
);
109 __asm__
__volatile__ (PPC_MSGSND(%0) : : "r" (msg
));
116 #if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP)
117 if (cpu
>= 0 && cpu
< nr_cpu_ids
&& paca
[cpu
].kvm_hstate
.xics_phys
) {
126 static void kvmppc_fast_vcpu_kick_hv(struct kvm_vcpu
*vcpu
)
129 struct swait_queue_head
*wqp
;
131 wqp
= kvm_arch_vcpu_wq(vcpu
);
132 if (swait_active(wqp
)) {
134 ++vcpu
->stat
.halt_wakeup
;
137 if (kvmppc_ipi_thread(vcpu
->arch
.thread_cpu
))
140 /* CPU points to the first thread of the core */
142 if (cpu
>= 0 && cpu
< nr_cpu_ids
&& cpu_online(cpu
))
143 smp_send_reschedule(cpu
);
147 * We use the vcpu_load/put functions to measure stolen time.
148 * Stolen time is counted as time when either the vcpu is able to
149 * run as part of a virtual core, but the task running the vcore
150 * is preempted or sleeping, or when the vcpu needs something done
151 * in the kernel by the task running the vcpu, but that task is
152 * preempted or sleeping. Those two things have to be counted
153 * separately, since one of the vcpu tasks will take on the job
154 * of running the core, and the other vcpu tasks in the vcore will
155 * sleep waiting for it to do that, but that sleep shouldn't count
158 * Hence we accumulate stolen time when the vcpu can run as part of
159 * a vcore using vc->stolen_tb, and the stolen time when the vcpu
160 * needs its task to do other things in the kernel (for example,
161 * service a page fault) in busy_stolen. We don't accumulate
162 * stolen time for a vcore when it is inactive, or for a vcpu
163 * when it is in state RUNNING or NOTREADY. NOTREADY is a bit of
164 * a misnomer; it means that the vcpu task is not executing in
165 * the KVM_VCPU_RUN ioctl, i.e. it is in userspace or elsewhere in
166 * the kernel. We don't have any way of dividing up that time
167 * between time that the vcpu is genuinely stopped, time that
168 * the task is actively working on behalf of the vcpu, and time
169 * that the task is preempted, so we don't count any of it as
172 * Updates to busy_stolen are protected by arch.tbacct_lock;
173 * updates to vc->stolen_tb are protected by the vcore->stoltb_lock
174 * lock. The stolen times are measured in units of timebase ticks.
175 * (Note that the != TB_NIL checks below are purely defensive;
176 * they should never fail.)
179 static void kvmppc_core_start_stolen(struct kvmppc_vcore
*vc
)
183 spin_lock_irqsave(&vc
->stoltb_lock
, flags
);
184 vc
->preempt_tb
= mftb();
185 spin_unlock_irqrestore(&vc
->stoltb_lock
, flags
);
188 static void kvmppc_core_end_stolen(struct kvmppc_vcore
*vc
)
192 spin_lock_irqsave(&vc
->stoltb_lock
, flags
);
193 if (vc
->preempt_tb
!= TB_NIL
) {
194 vc
->stolen_tb
+= mftb() - vc
->preempt_tb
;
195 vc
->preempt_tb
= TB_NIL
;
197 spin_unlock_irqrestore(&vc
->stoltb_lock
, flags
);
200 static void kvmppc_core_vcpu_load_hv(struct kvm_vcpu
*vcpu
, int cpu
)
202 struct kvmppc_vcore
*vc
= vcpu
->arch
.vcore
;
206 * We can test vc->runner without taking the vcore lock,
207 * because only this task ever sets vc->runner to this
208 * vcpu, and once it is set to this vcpu, only this task
209 * ever sets it to NULL.
211 if (vc
->runner
== vcpu
&& vc
->vcore_state
>= VCORE_SLEEPING
)
212 kvmppc_core_end_stolen(vc
);
214 spin_lock_irqsave(&vcpu
->arch
.tbacct_lock
, flags
);
215 if (vcpu
->arch
.state
== KVMPPC_VCPU_BUSY_IN_HOST
&&
216 vcpu
->arch
.busy_preempt
!= TB_NIL
) {
217 vcpu
->arch
.busy_stolen
+= mftb() - vcpu
->arch
.busy_preempt
;
218 vcpu
->arch
.busy_preempt
= TB_NIL
;
220 spin_unlock_irqrestore(&vcpu
->arch
.tbacct_lock
, flags
);
223 static void kvmppc_core_vcpu_put_hv(struct kvm_vcpu
*vcpu
)
225 struct kvmppc_vcore
*vc
= vcpu
->arch
.vcore
;
228 if (vc
->runner
== vcpu
&& vc
->vcore_state
>= VCORE_SLEEPING
)
229 kvmppc_core_start_stolen(vc
);
231 spin_lock_irqsave(&vcpu
->arch
.tbacct_lock
, flags
);
232 if (vcpu
->arch
.state
== KVMPPC_VCPU_BUSY_IN_HOST
)
233 vcpu
->arch
.busy_preempt
= mftb();
234 spin_unlock_irqrestore(&vcpu
->arch
.tbacct_lock
, flags
);
237 static void kvmppc_set_msr_hv(struct kvm_vcpu
*vcpu
, u64 msr
)
240 * Check for illegal transactional state bit combination
241 * and if we find it, force the TS field to a safe state.
243 if ((msr
& MSR_TS_MASK
) == MSR_TS_MASK
)
245 vcpu
->arch
.shregs
.msr
= msr
;
246 kvmppc_end_cede(vcpu
);
249 static void kvmppc_set_pvr_hv(struct kvm_vcpu
*vcpu
, u32 pvr
)
251 vcpu
->arch
.pvr
= pvr
;
254 static int kvmppc_set_arch_compat(struct kvm_vcpu
*vcpu
, u32 arch_compat
)
256 unsigned long pcr
= 0;
257 struct kvmppc_vcore
*vc
= vcpu
->arch
.vcore
;
260 switch (arch_compat
) {
263 * If an arch bit is set in PCR, all the defined
264 * higher-order arch bits also have to be set.
266 pcr
= PCR_ARCH_206
| PCR_ARCH_205
;
278 if (!cpu_has_feature(CPU_FTR_ARCH_207S
)) {
279 /* POWER7 can't emulate POWER8 */
280 if (!(pcr
& PCR_ARCH_206
))
282 pcr
&= ~PCR_ARCH_206
;
286 spin_lock(&vc
->lock
);
287 vc
->arch_compat
= arch_compat
;
289 spin_unlock(&vc
->lock
);
294 static void kvmppc_dump_regs(struct kvm_vcpu
*vcpu
)
298 pr_err("vcpu %p (%d):\n", vcpu
, vcpu
->vcpu_id
);
299 pr_err("pc = %.16lx msr = %.16llx trap = %x\n",
300 vcpu
->arch
.pc
, vcpu
->arch
.shregs
.msr
, vcpu
->arch
.trap
);
301 for (r
= 0; r
< 16; ++r
)
302 pr_err("r%2d = %.16lx r%d = %.16lx\n",
303 r
, kvmppc_get_gpr(vcpu
, r
),
304 r
+16, kvmppc_get_gpr(vcpu
, r
+16));
305 pr_err("ctr = %.16lx lr = %.16lx\n",
306 vcpu
->arch
.ctr
, vcpu
->arch
.lr
);
307 pr_err("srr0 = %.16llx srr1 = %.16llx\n",
308 vcpu
->arch
.shregs
.srr0
, vcpu
->arch
.shregs
.srr1
);
309 pr_err("sprg0 = %.16llx sprg1 = %.16llx\n",
310 vcpu
->arch
.shregs
.sprg0
, vcpu
->arch
.shregs
.sprg1
);
311 pr_err("sprg2 = %.16llx sprg3 = %.16llx\n",
312 vcpu
->arch
.shregs
.sprg2
, vcpu
->arch
.shregs
.sprg3
);
313 pr_err("cr = %.8x xer = %.16lx dsisr = %.8x\n",
314 vcpu
->arch
.cr
, vcpu
->arch
.xer
, vcpu
->arch
.shregs
.dsisr
);
315 pr_err("dar = %.16llx\n", vcpu
->arch
.shregs
.dar
);
316 pr_err("fault dar = %.16lx dsisr = %.8x\n",
317 vcpu
->arch
.fault_dar
, vcpu
->arch
.fault_dsisr
);
318 pr_err("SLB (%d entries):\n", vcpu
->arch
.slb_max
);
319 for (r
= 0; r
< vcpu
->arch
.slb_max
; ++r
)
320 pr_err(" ESID = %.16llx VSID = %.16llx\n",
321 vcpu
->arch
.slb
[r
].orige
, vcpu
->arch
.slb
[r
].origv
);
322 pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n",
323 vcpu
->arch
.vcore
->lpcr
, vcpu
->kvm
->arch
.sdr1
,
324 vcpu
->arch
.last_inst
);
327 static struct kvm_vcpu
*kvmppc_find_vcpu(struct kvm
*kvm
, int id
)
329 struct kvm_vcpu
*ret
;
331 mutex_lock(&kvm
->lock
);
332 ret
= kvm_get_vcpu_by_id(kvm
, id
);
333 mutex_unlock(&kvm
->lock
);
337 static void init_vpa(struct kvm_vcpu
*vcpu
, struct lppaca
*vpa
)
339 vpa
->__old_status
|= LPPACA_OLD_SHARED_PROC
;
340 vpa
->yield_count
= cpu_to_be32(1);
343 static int set_vpa(struct kvm_vcpu
*vcpu
, struct kvmppc_vpa
*v
,
344 unsigned long addr
, unsigned long len
)
346 /* check address is cacheline aligned */
347 if (addr
& (L1_CACHE_BYTES
- 1))
349 spin_lock(&vcpu
->arch
.vpa_update_lock
);
350 if (v
->next_gpa
!= addr
|| v
->len
!= len
) {
352 v
->len
= addr
? len
: 0;
353 v
->update_pending
= 1;
355 spin_unlock(&vcpu
->arch
.vpa_update_lock
);
359 /* Length for a per-processor buffer is passed in at offset 4 in the buffer */
368 static int vpa_is_registered(struct kvmppc_vpa
*vpap
)
370 if (vpap
->update_pending
)
371 return vpap
->next_gpa
!= 0;
372 return vpap
->pinned_addr
!= NULL
;
375 static unsigned long do_h_register_vpa(struct kvm_vcpu
*vcpu
,
377 unsigned long vcpuid
, unsigned long vpa
)
379 struct kvm
*kvm
= vcpu
->kvm
;
380 unsigned long len
, nb
;
382 struct kvm_vcpu
*tvcpu
;
385 struct kvmppc_vpa
*vpap
;
387 tvcpu
= kvmppc_find_vcpu(kvm
, vcpuid
);
391 subfunc
= (flags
>> H_VPA_FUNC_SHIFT
) & H_VPA_FUNC_MASK
;
392 if (subfunc
== H_VPA_REG_VPA
|| subfunc
== H_VPA_REG_DTL
||
393 subfunc
== H_VPA_REG_SLB
) {
394 /* Registering new area - address must be cache-line aligned */
395 if ((vpa
& (L1_CACHE_BYTES
- 1)) || !vpa
)
398 /* convert logical addr to kernel addr and read length */
399 va
= kvmppc_pin_guest_page(kvm
, vpa
, &nb
);
402 if (subfunc
== H_VPA_REG_VPA
)
403 len
= be16_to_cpu(((struct reg_vpa
*)va
)->length
.hword
);
405 len
= be32_to_cpu(((struct reg_vpa
*)va
)->length
.word
);
406 kvmppc_unpin_guest_page(kvm
, va
, vpa
, false);
409 if (len
> nb
|| len
< sizeof(struct reg_vpa
))
418 spin_lock(&tvcpu
->arch
.vpa_update_lock
);
421 case H_VPA_REG_VPA
: /* register VPA */
422 if (len
< sizeof(struct lppaca
))
424 vpap
= &tvcpu
->arch
.vpa
;
428 case H_VPA_REG_DTL
: /* register DTL */
429 if (len
< sizeof(struct dtl_entry
))
431 len
-= len
% sizeof(struct dtl_entry
);
433 /* Check that they have previously registered a VPA */
435 if (!vpa_is_registered(&tvcpu
->arch
.vpa
))
438 vpap
= &tvcpu
->arch
.dtl
;
442 case H_VPA_REG_SLB
: /* register SLB shadow buffer */
443 /* Check that they have previously registered a VPA */
445 if (!vpa_is_registered(&tvcpu
->arch
.vpa
))
448 vpap
= &tvcpu
->arch
.slb_shadow
;
452 case H_VPA_DEREG_VPA
: /* deregister VPA */
453 /* Check they don't still have a DTL or SLB buf registered */
455 if (vpa_is_registered(&tvcpu
->arch
.dtl
) ||
456 vpa_is_registered(&tvcpu
->arch
.slb_shadow
))
459 vpap
= &tvcpu
->arch
.vpa
;
463 case H_VPA_DEREG_DTL
: /* deregister DTL */
464 vpap
= &tvcpu
->arch
.dtl
;
468 case H_VPA_DEREG_SLB
: /* deregister SLB shadow buffer */
469 vpap
= &tvcpu
->arch
.slb_shadow
;
475 vpap
->next_gpa
= vpa
;
477 vpap
->update_pending
= 1;
480 spin_unlock(&tvcpu
->arch
.vpa_update_lock
);
485 static void kvmppc_update_vpa(struct kvm_vcpu
*vcpu
, struct kvmppc_vpa
*vpap
)
487 struct kvm
*kvm
= vcpu
->kvm
;
493 * We need to pin the page pointed to by vpap->next_gpa,
494 * but we can't call kvmppc_pin_guest_page under the lock
495 * as it does get_user_pages() and down_read(). So we
496 * have to drop the lock, pin the page, then get the lock
497 * again and check that a new area didn't get registered
501 gpa
= vpap
->next_gpa
;
502 spin_unlock(&vcpu
->arch
.vpa_update_lock
);
506 va
= kvmppc_pin_guest_page(kvm
, gpa
, &nb
);
507 spin_lock(&vcpu
->arch
.vpa_update_lock
);
508 if (gpa
== vpap
->next_gpa
)
510 /* sigh... unpin that one and try again */
512 kvmppc_unpin_guest_page(kvm
, va
, gpa
, false);
515 vpap
->update_pending
= 0;
516 if (va
&& nb
< vpap
->len
) {
518 * If it's now too short, it must be that userspace
519 * has changed the mappings underlying guest memory,
520 * so unregister the region.
522 kvmppc_unpin_guest_page(kvm
, va
, gpa
, false);
525 if (vpap
->pinned_addr
)
526 kvmppc_unpin_guest_page(kvm
, vpap
->pinned_addr
, vpap
->gpa
,
529 vpap
->pinned_addr
= va
;
532 vpap
->pinned_end
= va
+ vpap
->len
;
535 static void kvmppc_update_vpas(struct kvm_vcpu
*vcpu
)
537 if (!(vcpu
->arch
.vpa
.update_pending
||
538 vcpu
->arch
.slb_shadow
.update_pending
||
539 vcpu
->arch
.dtl
.update_pending
))
542 spin_lock(&vcpu
->arch
.vpa_update_lock
);
543 if (vcpu
->arch
.vpa
.update_pending
) {
544 kvmppc_update_vpa(vcpu
, &vcpu
->arch
.vpa
);
545 if (vcpu
->arch
.vpa
.pinned_addr
)
546 init_vpa(vcpu
, vcpu
->arch
.vpa
.pinned_addr
);
548 if (vcpu
->arch
.dtl
.update_pending
) {
549 kvmppc_update_vpa(vcpu
, &vcpu
->arch
.dtl
);
550 vcpu
->arch
.dtl_ptr
= vcpu
->arch
.dtl
.pinned_addr
;
551 vcpu
->arch
.dtl_index
= 0;
553 if (vcpu
->arch
.slb_shadow
.update_pending
)
554 kvmppc_update_vpa(vcpu
, &vcpu
->arch
.slb_shadow
);
555 spin_unlock(&vcpu
->arch
.vpa_update_lock
);
559 * Return the accumulated stolen time for the vcore up until `now'.
560 * The caller should hold the vcore lock.
562 static u64
vcore_stolen_time(struct kvmppc_vcore
*vc
, u64 now
)
567 spin_lock_irqsave(&vc
->stoltb_lock
, flags
);
569 if (vc
->vcore_state
!= VCORE_INACTIVE
&&
570 vc
->preempt_tb
!= TB_NIL
)
571 p
+= now
- vc
->preempt_tb
;
572 spin_unlock_irqrestore(&vc
->stoltb_lock
, flags
);
576 static void kvmppc_create_dtl_entry(struct kvm_vcpu
*vcpu
,
577 struct kvmppc_vcore
*vc
)
579 struct dtl_entry
*dt
;
581 unsigned long stolen
;
582 unsigned long core_stolen
;
585 dt
= vcpu
->arch
.dtl_ptr
;
586 vpa
= vcpu
->arch
.vpa
.pinned_addr
;
588 core_stolen
= vcore_stolen_time(vc
, now
);
589 stolen
= core_stolen
- vcpu
->arch
.stolen_logged
;
590 vcpu
->arch
.stolen_logged
= core_stolen
;
591 spin_lock_irq(&vcpu
->arch
.tbacct_lock
);
592 stolen
+= vcpu
->arch
.busy_stolen
;
593 vcpu
->arch
.busy_stolen
= 0;
594 spin_unlock_irq(&vcpu
->arch
.tbacct_lock
);
597 memset(dt
, 0, sizeof(struct dtl_entry
));
598 dt
->dispatch_reason
= 7;
599 dt
->processor_id
= cpu_to_be16(vc
->pcpu
+ vcpu
->arch
.ptid
);
600 dt
->timebase
= cpu_to_be64(now
+ vc
->tb_offset
);
601 dt
->enqueue_to_dispatch_time
= cpu_to_be32(stolen
);
602 dt
->srr0
= cpu_to_be64(kvmppc_get_pc(vcpu
));
603 dt
->srr1
= cpu_to_be64(vcpu
->arch
.shregs
.msr
);
605 if (dt
== vcpu
->arch
.dtl
.pinned_end
)
606 dt
= vcpu
->arch
.dtl
.pinned_addr
;
607 vcpu
->arch
.dtl_ptr
= dt
;
608 /* order writing *dt vs. writing vpa->dtl_idx */
610 vpa
->dtl_idx
= cpu_to_be64(++vcpu
->arch
.dtl_index
);
611 vcpu
->arch
.dtl
.dirty
= true;
614 static bool kvmppc_power8_compatible(struct kvm_vcpu
*vcpu
)
616 if (vcpu
->arch
.vcore
->arch_compat
>= PVR_ARCH_207
)
618 if ((!vcpu
->arch
.vcore
->arch_compat
) &&
619 cpu_has_feature(CPU_FTR_ARCH_207S
))
624 static int kvmppc_h_set_mode(struct kvm_vcpu
*vcpu
, unsigned long mflags
,
625 unsigned long resource
, unsigned long value1
,
626 unsigned long value2
)
629 case H_SET_MODE_RESOURCE_SET_CIABR
:
630 if (!kvmppc_power8_compatible(vcpu
))
635 return H_UNSUPPORTED_FLAG_START
;
636 /* Guests can't breakpoint the hypervisor */
637 if ((value1
& CIABR_PRIV
) == CIABR_PRIV_HYPER
)
639 vcpu
->arch
.ciabr
= value1
;
641 case H_SET_MODE_RESOURCE_SET_DAWR
:
642 if (!kvmppc_power8_compatible(vcpu
))
645 return H_UNSUPPORTED_FLAG_START
;
646 if (value2
& DABRX_HYP
)
648 vcpu
->arch
.dawr
= value1
;
649 vcpu
->arch
.dawrx
= value2
;
656 static int kvm_arch_vcpu_yield_to(struct kvm_vcpu
*target
)
658 struct kvmppc_vcore
*vcore
= target
->arch
.vcore
;
661 * We expect to have been called by the real mode handler
662 * (kvmppc_rm_h_confer()) which would have directly returned
663 * H_SUCCESS if the source vcore wasn't idle (e.g. if it may
664 * have useful work to do and should not confer) so we don't
668 spin_lock(&vcore
->lock
);
669 if (target
->arch
.state
== KVMPPC_VCPU_RUNNABLE
&&
670 vcore
->vcore_state
!= VCORE_INACTIVE
&&
672 target
= vcore
->runner
;
673 spin_unlock(&vcore
->lock
);
675 return kvm_vcpu_yield_to(target
);
678 static int kvmppc_get_yield_count(struct kvm_vcpu
*vcpu
)
681 struct lppaca
*lppaca
;
683 spin_lock(&vcpu
->arch
.vpa_update_lock
);
684 lppaca
= (struct lppaca
*)vcpu
->arch
.vpa
.pinned_addr
;
686 yield_count
= be32_to_cpu(lppaca
->yield_count
);
687 spin_unlock(&vcpu
->arch
.vpa_update_lock
);
691 int kvmppc_pseries_do_hcall(struct kvm_vcpu
*vcpu
)
693 unsigned long req
= kvmppc_get_gpr(vcpu
, 3);
694 unsigned long target
, ret
= H_SUCCESS
;
696 struct kvm_vcpu
*tvcpu
;
699 if (req
<= MAX_HCALL_OPCODE
&&
700 !test_bit(req
/4, vcpu
->kvm
->arch
.enabled_hcalls
))
707 target
= kvmppc_get_gpr(vcpu
, 4);
708 tvcpu
= kvmppc_find_vcpu(vcpu
->kvm
, target
);
713 tvcpu
->arch
.prodded
= 1;
715 if (vcpu
->arch
.ceded
) {
716 if (swait_active(&vcpu
->wq
)) {
718 vcpu
->stat
.halt_wakeup
++;
723 target
= kvmppc_get_gpr(vcpu
, 4);
726 tvcpu
= kvmppc_find_vcpu(vcpu
->kvm
, target
);
731 yield_count
= kvmppc_get_gpr(vcpu
, 5);
732 if (kvmppc_get_yield_count(tvcpu
) != yield_count
)
734 kvm_arch_vcpu_yield_to(tvcpu
);
737 ret
= do_h_register_vpa(vcpu
, kvmppc_get_gpr(vcpu
, 4),
738 kvmppc_get_gpr(vcpu
, 5),
739 kvmppc_get_gpr(vcpu
, 6));
742 if (list_empty(&vcpu
->kvm
->arch
.rtas_tokens
))
745 idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
746 rc
= kvmppc_rtas_hcall(vcpu
);
747 srcu_read_unlock(&vcpu
->kvm
->srcu
, idx
);
754 /* Send the error out to userspace via KVM_RUN */
756 case H_LOGICAL_CI_LOAD
:
757 ret
= kvmppc_h_logical_ci_load(vcpu
);
758 if (ret
== H_TOO_HARD
)
761 case H_LOGICAL_CI_STORE
:
762 ret
= kvmppc_h_logical_ci_store(vcpu
);
763 if (ret
== H_TOO_HARD
)
767 ret
= kvmppc_h_set_mode(vcpu
, kvmppc_get_gpr(vcpu
, 4),
768 kvmppc_get_gpr(vcpu
, 5),
769 kvmppc_get_gpr(vcpu
, 6),
770 kvmppc_get_gpr(vcpu
, 7));
771 if (ret
== H_TOO_HARD
)
780 if (kvmppc_xics_enabled(vcpu
)) {
781 ret
= kvmppc_xics_hcall(vcpu
, req
);
786 ret
= kvmppc_h_put_tce(vcpu
, kvmppc_get_gpr(vcpu
, 4),
787 kvmppc_get_gpr(vcpu
, 5),
788 kvmppc_get_gpr(vcpu
, 6));
789 if (ret
== H_TOO_HARD
)
792 case H_PUT_TCE_INDIRECT
:
793 ret
= kvmppc_h_put_tce_indirect(vcpu
, kvmppc_get_gpr(vcpu
, 4),
794 kvmppc_get_gpr(vcpu
, 5),
795 kvmppc_get_gpr(vcpu
, 6),
796 kvmppc_get_gpr(vcpu
, 7));
797 if (ret
== H_TOO_HARD
)
801 ret
= kvmppc_h_stuff_tce(vcpu
, kvmppc_get_gpr(vcpu
, 4),
802 kvmppc_get_gpr(vcpu
, 5),
803 kvmppc_get_gpr(vcpu
, 6),
804 kvmppc_get_gpr(vcpu
, 7));
805 if (ret
== H_TOO_HARD
)
811 kvmppc_set_gpr(vcpu
, 3, ret
);
812 vcpu
->arch
.hcall_needed
= 0;
816 static int kvmppc_hcall_impl_hv(unsigned long cmd
)
824 case H_LOGICAL_CI_LOAD
:
825 case H_LOGICAL_CI_STORE
:
826 #ifdef CONFIG_KVM_XICS
837 /* See if it's in the real-mode table */
838 return kvmppc_hcall_impl_hv_realmode(cmd
);
841 static int kvmppc_emulate_debug_inst(struct kvm_run
*run
,
842 struct kvm_vcpu
*vcpu
)
846 if (kvmppc_get_last_inst(vcpu
, INST_GENERIC
, &last_inst
) !=
849 * Fetch failed, so return to guest and
850 * try executing it again.
855 if (last_inst
== KVMPPC_INST_SW_BREAKPOINT
) {
856 run
->exit_reason
= KVM_EXIT_DEBUG
;
857 run
->debug
.arch
.address
= kvmppc_get_pc(vcpu
);
860 kvmppc_core_queue_program(vcpu
, SRR1_PROGILL
);
865 static int kvmppc_handle_exit_hv(struct kvm_run
*run
, struct kvm_vcpu
*vcpu
,
866 struct task_struct
*tsk
)
870 vcpu
->stat
.sum_exits
++;
873 * This can happen if an interrupt occurs in the last stages
874 * of guest entry or the first stages of guest exit (i.e. after
875 * setting paca->kvm_hstate.in_guest to KVM_GUEST_MODE_GUEST_HV
876 * and before setting it to KVM_GUEST_MODE_HOST_HV).
877 * That can happen due to a bug, or due to a machine check
878 * occurring at just the wrong time.
880 if (vcpu
->arch
.shregs
.msr
& MSR_HV
) {
881 printk(KERN_EMERG
"KVM trap in HV mode!\n");
882 printk(KERN_EMERG
"trap=0x%x | pc=0x%lx | msr=0x%llx\n",
883 vcpu
->arch
.trap
, kvmppc_get_pc(vcpu
),
884 vcpu
->arch
.shregs
.msr
);
885 kvmppc_dump_regs(vcpu
);
886 run
->exit_reason
= KVM_EXIT_INTERNAL_ERROR
;
887 run
->hw
.hardware_exit_reason
= vcpu
->arch
.trap
;
890 run
->exit_reason
= KVM_EXIT_UNKNOWN
;
891 run
->ready_for_interrupt_injection
= 1;
892 switch (vcpu
->arch
.trap
) {
893 /* We're good on these - the host merely wanted to get our attention */
894 case BOOK3S_INTERRUPT_HV_DECREMENTER
:
895 vcpu
->stat
.dec_exits
++;
898 case BOOK3S_INTERRUPT_EXTERNAL
:
899 case BOOK3S_INTERRUPT_H_DOORBELL
:
900 vcpu
->stat
.ext_intr_exits
++;
903 /* HMI is hypervisor interrupt and host has handled it. Resume guest.*/
904 case BOOK3S_INTERRUPT_HMI
:
905 case BOOK3S_INTERRUPT_PERFMON
:
908 case BOOK3S_INTERRUPT_MACHINE_CHECK
:
910 * Deliver a machine check interrupt to the guest.
911 * We have to do this, even if the host has handled the
912 * machine check, because machine checks use SRR0/1 and
913 * the interrupt might have trashed guest state in them.
915 kvmppc_book3s_queue_irqprio(vcpu
,
916 BOOK3S_INTERRUPT_MACHINE_CHECK
);
919 case BOOK3S_INTERRUPT_PROGRAM
:
923 * Normally program interrupts are delivered directly
924 * to the guest by the hardware, but we can get here
925 * as a result of a hypervisor emulation interrupt
926 * (e40) getting turned into a 700 by BML RTAS.
928 flags
= vcpu
->arch
.shregs
.msr
& 0x1f0000ull
;
929 kvmppc_core_queue_program(vcpu
, flags
);
933 case BOOK3S_INTERRUPT_SYSCALL
:
935 /* hcall - punt to userspace */
938 /* hypercall with MSR_PR has already been handled in rmode,
939 * and never reaches here.
942 run
->papr_hcall
.nr
= kvmppc_get_gpr(vcpu
, 3);
943 for (i
= 0; i
< 9; ++i
)
944 run
->papr_hcall
.args
[i
] = kvmppc_get_gpr(vcpu
, 4 + i
);
945 run
->exit_reason
= KVM_EXIT_PAPR_HCALL
;
946 vcpu
->arch
.hcall_needed
= 1;
951 * We get these next two if the guest accesses a page which it thinks
952 * it has mapped but which is not actually present, either because
953 * it is for an emulated I/O device or because the corresonding
954 * host page has been paged out. Any other HDSI/HISI interrupts
955 * have been handled already.
957 case BOOK3S_INTERRUPT_H_DATA_STORAGE
:
958 r
= RESUME_PAGE_FAULT
;
960 case BOOK3S_INTERRUPT_H_INST_STORAGE
:
961 vcpu
->arch
.fault_dar
= kvmppc_get_pc(vcpu
);
962 vcpu
->arch
.fault_dsisr
= 0;
963 r
= RESUME_PAGE_FAULT
;
966 * This occurs if the guest executes an illegal instruction.
967 * If the guest debug is disabled, generate a program interrupt
968 * to the guest. If guest debug is enabled, we need to check
969 * whether the instruction is a software breakpoint instruction.
970 * Accordingly return to Guest or Host.
972 case BOOK3S_INTERRUPT_H_EMUL_ASSIST
:
973 if (vcpu
->arch
.emul_inst
!= KVM_INST_FETCH_FAILED
)
974 vcpu
->arch
.last_inst
= kvmppc_need_byteswap(vcpu
) ?
975 swab32(vcpu
->arch
.emul_inst
) :
976 vcpu
->arch
.emul_inst
;
977 if (vcpu
->guest_debug
& KVM_GUESTDBG_USE_SW_BP
) {
978 r
= kvmppc_emulate_debug_inst(run
, vcpu
);
980 kvmppc_core_queue_program(vcpu
, SRR1_PROGILL
);
985 * This occurs if the guest (kernel or userspace), does something that
986 * is prohibited by HFSCR. We just generate a program interrupt to
989 case BOOK3S_INTERRUPT_H_FAC_UNAVAIL
:
990 kvmppc_core_queue_program(vcpu
, SRR1_PROGILL
);
994 kvmppc_dump_regs(vcpu
);
995 printk(KERN_EMERG
"trap=0x%x | pc=0x%lx | msr=0x%llx\n",
996 vcpu
->arch
.trap
, kvmppc_get_pc(vcpu
),
997 vcpu
->arch
.shregs
.msr
);
998 run
->hw
.hardware_exit_reason
= vcpu
->arch
.trap
;
1006 static int kvm_arch_vcpu_ioctl_get_sregs_hv(struct kvm_vcpu
*vcpu
,
1007 struct kvm_sregs
*sregs
)
1011 memset(sregs
, 0, sizeof(struct kvm_sregs
));
1012 sregs
->pvr
= vcpu
->arch
.pvr
;
1013 for (i
= 0; i
< vcpu
->arch
.slb_max
; i
++) {
1014 sregs
->u
.s
.ppc64
.slb
[i
].slbe
= vcpu
->arch
.slb
[i
].orige
;
1015 sregs
->u
.s
.ppc64
.slb
[i
].slbv
= vcpu
->arch
.slb
[i
].origv
;
1021 static int kvm_arch_vcpu_ioctl_set_sregs_hv(struct kvm_vcpu
*vcpu
,
1022 struct kvm_sregs
*sregs
)
1026 /* Only accept the same PVR as the host's, since we can't spoof it */
1027 if (sregs
->pvr
!= vcpu
->arch
.pvr
)
1031 for (i
= 0; i
< vcpu
->arch
.slb_nr
; i
++) {
1032 if (sregs
->u
.s
.ppc64
.slb
[i
].slbe
& SLB_ESID_V
) {
1033 vcpu
->arch
.slb
[j
].orige
= sregs
->u
.s
.ppc64
.slb
[i
].slbe
;
1034 vcpu
->arch
.slb
[j
].origv
= sregs
->u
.s
.ppc64
.slb
[i
].slbv
;
1038 vcpu
->arch
.slb_max
= j
;
1043 static void kvmppc_set_lpcr(struct kvm_vcpu
*vcpu
, u64 new_lpcr
,
1044 bool preserve_top32
)
1046 struct kvm
*kvm
= vcpu
->kvm
;
1047 struct kvmppc_vcore
*vc
= vcpu
->arch
.vcore
;
1050 mutex_lock(&kvm
->lock
);
1051 spin_lock(&vc
->lock
);
1053 * If ILE (interrupt little-endian) has changed, update the
1054 * MSR_LE bit in the intr_msr for each vcpu in this vcore.
1056 if ((new_lpcr
& LPCR_ILE
) != (vc
->lpcr
& LPCR_ILE
)) {
1057 struct kvm_vcpu
*vcpu
;
1060 kvm_for_each_vcpu(i
, vcpu
, kvm
) {
1061 if (vcpu
->arch
.vcore
!= vc
)
1063 if (new_lpcr
& LPCR_ILE
)
1064 vcpu
->arch
.intr_msr
|= MSR_LE
;
1066 vcpu
->arch
.intr_msr
&= ~MSR_LE
;
1071 * Userspace can only modify DPFD (default prefetch depth),
1072 * ILE (interrupt little-endian) and TC (translation control).
1073 * On POWER8 userspace can also modify AIL (alt. interrupt loc.)
1075 mask
= LPCR_DPFD
| LPCR_ILE
| LPCR_TC
;
1076 if (cpu_has_feature(CPU_FTR_ARCH_207S
))
1079 /* Broken 32-bit version of LPCR must not clear top bits */
1082 vc
->lpcr
= (vc
->lpcr
& ~mask
) | (new_lpcr
& mask
);
1083 spin_unlock(&vc
->lock
);
1084 mutex_unlock(&kvm
->lock
);
1087 static int kvmppc_get_one_reg_hv(struct kvm_vcpu
*vcpu
, u64 id
,
1088 union kvmppc_one_reg
*val
)
1094 case KVM_REG_PPC_DEBUG_INST
:
1095 *val
= get_reg_val(id
, KVMPPC_INST_SW_BREAKPOINT
);
1097 case KVM_REG_PPC_HIOR
:
1098 *val
= get_reg_val(id
, 0);
1100 case KVM_REG_PPC_DABR
:
1101 *val
= get_reg_val(id
, vcpu
->arch
.dabr
);
1103 case KVM_REG_PPC_DABRX
:
1104 *val
= get_reg_val(id
, vcpu
->arch
.dabrx
);
1106 case KVM_REG_PPC_DSCR
:
1107 *val
= get_reg_val(id
, vcpu
->arch
.dscr
);
1109 case KVM_REG_PPC_PURR
:
1110 *val
= get_reg_val(id
, vcpu
->arch
.purr
);
1112 case KVM_REG_PPC_SPURR
:
1113 *val
= get_reg_val(id
, vcpu
->arch
.spurr
);
1115 case KVM_REG_PPC_AMR
:
1116 *val
= get_reg_val(id
, vcpu
->arch
.amr
);
1118 case KVM_REG_PPC_UAMOR
:
1119 *val
= get_reg_val(id
, vcpu
->arch
.uamor
);
1121 case KVM_REG_PPC_MMCR0
... KVM_REG_PPC_MMCRS
:
1122 i
= id
- KVM_REG_PPC_MMCR0
;
1123 *val
= get_reg_val(id
, vcpu
->arch
.mmcr
[i
]);
1125 case KVM_REG_PPC_PMC1
... KVM_REG_PPC_PMC8
:
1126 i
= id
- KVM_REG_PPC_PMC1
;
1127 *val
= get_reg_val(id
, vcpu
->arch
.pmc
[i
]);
1129 case KVM_REG_PPC_SPMC1
... KVM_REG_PPC_SPMC2
:
1130 i
= id
- KVM_REG_PPC_SPMC1
;
1131 *val
= get_reg_val(id
, vcpu
->arch
.spmc
[i
]);
1133 case KVM_REG_PPC_SIAR
:
1134 *val
= get_reg_val(id
, vcpu
->arch
.siar
);
1136 case KVM_REG_PPC_SDAR
:
1137 *val
= get_reg_val(id
, vcpu
->arch
.sdar
);
1139 case KVM_REG_PPC_SIER
:
1140 *val
= get_reg_val(id
, vcpu
->arch
.sier
);
1142 case KVM_REG_PPC_IAMR
:
1143 *val
= get_reg_val(id
, vcpu
->arch
.iamr
);
1145 case KVM_REG_PPC_PSPB
:
1146 *val
= get_reg_val(id
, vcpu
->arch
.pspb
);
1148 case KVM_REG_PPC_DPDES
:
1149 *val
= get_reg_val(id
, vcpu
->arch
.vcore
->dpdes
);
1151 case KVM_REG_PPC_DAWR
:
1152 *val
= get_reg_val(id
, vcpu
->arch
.dawr
);
1154 case KVM_REG_PPC_DAWRX
:
1155 *val
= get_reg_val(id
, vcpu
->arch
.dawrx
);
1157 case KVM_REG_PPC_CIABR
:
1158 *val
= get_reg_val(id
, vcpu
->arch
.ciabr
);
1160 case KVM_REG_PPC_CSIGR
:
1161 *val
= get_reg_val(id
, vcpu
->arch
.csigr
);
1163 case KVM_REG_PPC_TACR
:
1164 *val
= get_reg_val(id
, vcpu
->arch
.tacr
);
1166 case KVM_REG_PPC_TCSCR
:
1167 *val
= get_reg_val(id
, vcpu
->arch
.tcscr
);
1169 case KVM_REG_PPC_PID
:
1170 *val
= get_reg_val(id
, vcpu
->arch
.pid
);
1172 case KVM_REG_PPC_ACOP
:
1173 *val
= get_reg_val(id
, vcpu
->arch
.acop
);
1175 case KVM_REG_PPC_WORT
:
1176 *val
= get_reg_val(id
, vcpu
->arch
.wort
);
1178 case KVM_REG_PPC_VPA_ADDR
:
1179 spin_lock(&vcpu
->arch
.vpa_update_lock
);
1180 *val
= get_reg_val(id
, vcpu
->arch
.vpa
.next_gpa
);
1181 spin_unlock(&vcpu
->arch
.vpa_update_lock
);
1183 case KVM_REG_PPC_VPA_SLB
:
1184 spin_lock(&vcpu
->arch
.vpa_update_lock
);
1185 val
->vpaval
.addr
= vcpu
->arch
.slb_shadow
.next_gpa
;
1186 val
->vpaval
.length
= vcpu
->arch
.slb_shadow
.len
;
1187 spin_unlock(&vcpu
->arch
.vpa_update_lock
);
1189 case KVM_REG_PPC_VPA_DTL
:
1190 spin_lock(&vcpu
->arch
.vpa_update_lock
);
1191 val
->vpaval
.addr
= vcpu
->arch
.dtl
.next_gpa
;
1192 val
->vpaval
.length
= vcpu
->arch
.dtl
.len
;
1193 spin_unlock(&vcpu
->arch
.vpa_update_lock
);
1195 case KVM_REG_PPC_TB_OFFSET
:
1196 *val
= get_reg_val(id
, vcpu
->arch
.vcore
->tb_offset
);
1198 case KVM_REG_PPC_LPCR
:
1199 case KVM_REG_PPC_LPCR_64
:
1200 *val
= get_reg_val(id
, vcpu
->arch
.vcore
->lpcr
);
1202 case KVM_REG_PPC_PPR
:
1203 *val
= get_reg_val(id
, vcpu
->arch
.ppr
);
1205 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1206 case KVM_REG_PPC_TFHAR
:
1207 *val
= get_reg_val(id
, vcpu
->arch
.tfhar
);
1209 case KVM_REG_PPC_TFIAR
:
1210 *val
= get_reg_val(id
, vcpu
->arch
.tfiar
);
1212 case KVM_REG_PPC_TEXASR
:
1213 *val
= get_reg_val(id
, vcpu
->arch
.texasr
);
1215 case KVM_REG_PPC_TM_GPR0
... KVM_REG_PPC_TM_GPR31
:
1216 i
= id
- KVM_REG_PPC_TM_GPR0
;
1217 *val
= get_reg_val(id
, vcpu
->arch
.gpr_tm
[i
]);
1219 case KVM_REG_PPC_TM_VSR0
... KVM_REG_PPC_TM_VSR63
:
1222 i
= id
- KVM_REG_PPC_TM_VSR0
;
1224 for (j
= 0; j
< TS_FPRWIDTH
; j
++)
1225 val
->vsxval
[j
] = vcpu
->arch
.fp_tm
.fpr
[i
][j
];
1227 if (cpu_has_feature(CPU_FTR_ALTIVEC
))
1228 val
->vval
= vcpu
->arch
.vr_tm
.vr
[i
-32];
1234 case KVM_REG_PPC_TM_CR
:
1235 *val
= get_reg_val(id
, vcpu
->arch
.cr_tm
);
1237 case KVM_REG_PPC_TM_LR
:
1238 *val
= get_reg_val(id
, vcpu
->arch
.lr_tm
);
1240 case KVM_REG_PPC_TM_CTR
:
1241 *val
= get_reg_val(id
, vcpu
->arch
.ctr_tm
);
1243 case KVM_REG_PPC_TM_FPSCR
:
1244 *val
= get_reg_val(id
, vcpu
->arch
.fp_tm
.fpscr
);
1246 case KVM_REG_PPC_TM_AMR
:
1247 *val
= get_reg_val(id
, vcpu
->arch
.amr_tm
);
1249 case KVM_REG_PPC_TM_PPR
:
1250 *val
= get_reg_val(id
, vcpu
->arch
.ppr_tm
);
1252 case KVM_REG_PPC_TM_VRSAVE
:
1253 *val
= get_reg_val(id
, vcpu
->arch
.vrsave_tm
);
1255 case KVM_REG_PPC_TM_VSCR
:
1256 if (cpu_has_feature(CPU_FTR_ALTIVEC
))
1257 *val
= get_reg_val(id
, vcpu
->arch
.vr_tm
.vscr
.u
[3]);
1261 case KVM_REG_PPC_TM_DSCR
:
1262 *val
= get_reg_val(id
, vcpu
->arch
.dscr_tm
);
1264 case KVM_REG_PPC_TM_TAR
:
1265 *val
= get_reg_val(id
, vcpu
->arch
.tar_tm
);
1268 case KVM_REG_PPC_ARCH_COMPAT
:
1269 *val
= get_reg_val(id
, vcpu
->arch
.vcore
->arch_compat
);
1279 static int kvmppc_set_one_reg_hv(struct kvm_vcpu
*vcpu
, u64 id
,
1280 union kvmppc_one_reg
*val
)
1284 unsigned long addr
, len
;
1287 case KVM_REG_PPC_HIOR
:
1288 /* Only allow this to be set to zero */
1289 if (set_reg_val(id
, *val
))
1292 case KVM_REG_PPC_DABR
:
1293 vcpu
->arch
.dabr
= set_reg_val(id
, *val
);
1295 case KVM_REG_PPC_DABRX
:
1296 vcpu
->arch
.dabrx
= set_reg_val(id
, *val
) & ~DABRX_HYP
;
1298 case KVM_REG_PPC_DSCR
:
1299 vcpu
->arch
.dscr
= set_reg_val(id
, *val
);
1301 case KVM_REG_PPC_PURR
:
1302 vcpu
->arch
.purr
= set_reg_val(id
, *val
);
1304 case KVM_REG_PPC_SPURR
:
1305 vcpu
->arch
.spurr
= set_reg_val(id
, *val
);
1307 case KVM_REG_PPC_AMR
:
1308 vcpu
->arch
.amr
= set_reg_val(id
, *val
);
1310 case KVM_REG_PPC_UAMOR
:
1311 vcpu
->arch
.uamor
= set_reg_val(id
, *val
);
1313 case KVM_REG_PPC_MMCR0
... KVM_REG_PPC_MMCRS
:
1314 i
= id
- KVM_REG_PPC_MMCR0
;
1315 vcpu
->arch
.mmcr
[i
] = set_reg_val(id
, *val
);
1317 case KVM_REG_PPC_PMC1
... KVM_REG_PPC_PMC8
:
1318 i
= id
- KVM_REG_PPC_PMC1
;
1319 vcpu
->arch
.pmc
[i
] = set_reg_val(id
, *val
);
1321 case KVM_REG_PPC_SPMC1
... KVM_REG_PPC_SPMC2
:
1322 i
= id
- KVM_REG_PPC_SPMC1
;
1323 vcpu
->arch
.spmc
[i
] = set_reg_val(id
, *val
);
1325 case KVM_REG_PPC_SIAR
:
1326 vcpu
->arch
.siar
= set_reg_val(id
, *val
);
1328 case KVM_REG_PPC_SDAR
:
1329 vcpu
->arch
.sdar
= set_reg_val(id
, *val
);
1331 case KVM_REG_PPC_SIER
:
1332 vcpu
->arch
.sier
= set_reg_val(id
, *val
);
1334 case KVM_REG_PPC_IAMR
:
1335 vcpu
->arch
.iamr
= set_reg_val(id
, *val
);
1337 case KVM_REG_PPC_PSPB
:
1338 vcpu
->arch
.pspb
= set_reg_val(id
, *val
);
1340 case KVM_REG_PPC_DPDES
:
1341 vcpu
->arch
.vcore
->dpdes
= set_reg_val(id
, *val
);
1343 case KVM_REG_PPC_DAWR
:
1344 vcpu
->arch
.dawr
= set_reg_val(id
, *val
);
1346 case KVM_REG_PPC_DAWRX
:
1347 vcpu
->arch
.dawrx
= set_reg_val(id
, *val
) & ~DAWRX_HYP
;
1349 case KVM_REG_PPC_CIABR
:
1350 vcpu
->arch
.ciabr
= set_reg_val(id
, *val
);
1351 /* Don't allow setting breakpoints in hypervisor code */
1352 if ((vcpu
->arch
.ciabr
& CIABR_PRIV
) == CIABR_PRIV_HYPER
)
1353 vcpu
->arch
.ciabr
&= ~CIABR_PRIV
; /* disable */
1355 case KVM_REG_PPC_CSIGR
:
1356 vcpu
->arch
.csigr
= set_reg_val(id
, *val
);
1358 case KVM_REG_PPC_TACR
:
1359 vcpu
->arch
.tacr
= set_reg_val(id
, *val
);
1361 case KVM_REG_PPC_TCSCR
:
1362 vcpu
->arch
.tcscr
= set_reg_val(id
, *val
);
1364 case KVM_REG_PPC_PID
:
1365 vcpu
->arch
.pid
= set_reg_val(id
, *val
);
1367 case KVM_REG_PPC_ACOP
:
1368 vcpu
->arch
.acop
= set_reg_val(id
, *val
);
1370 case KVM_REG_PPC_WORT
:
1371 vcpu
->arch
.wort
= set_reg_val(id
, *val
);
1373 case KVM_REG_PPC_VPA_ADDR
:
1374 addr
= set_reg_val(id
, *val
);
1376 if (!addr
&& (vcpu
->arch
.slb_shadow
.next_gpa
||
1377 vcpu
->arch
.dtl
.next_gpa
))
1379 r
= set_vpa(vcpu
, &vcpu
->arch
.vpa
, addr
, sizeof(struct lppaca
));
1381 case KVM_REG_PPC_VPA_SLB
:
1382 addr
= val
->vpaval
.addr
;
1383 len
= val
->vpaval
.length
;
1385 if (addr
&& !vcpu
->arch
.vpa
.next_gpa
)
1387 r
= set_vpa(vcpu
, &vcpu
->arch
.slb_shadow
, addr
, len
);
1389 case KVM_REG_PPC_VPA_DTL
:
1390 addr
= val
->vpaval
.addr
;
1391 len
= val
->vpaval
.length
;
1393 if (addr
&& (len
< sizeof(struct dtl_entry
) ||
1394 !vcpu
->arch
.vpa
.next_gpa
))
1396 len
-= len
% sizeof(struct dtl_entry
);
1397 r
= set_vpa(vcpu
, &vcpu
->arch
.dtl
, addr
, len
);
1399 case KVM_REG_PPC_TB_OFFSET
:
1400 /* round up to multiple of 2^24 */
1401 vcpu
->arch
.vcore
->tb_offset
=
1402 ALIGN(set_reg_val(id
, *val
), 1UL << 24);
1404 case KVM_REG_PPC_LPCR
:
1405 kvmppc_set_lpcr(vcpu
, set_reg_val(id
, *val
), true);
1407 case KVM_REG_PPC_LPCR_64
:
1408 kvmppc_set_lpcr(vcpu
, set_reg_val(id
, *val
), false);
1410 case KVM_REG_PPC_PPR
:
1411 vcpu
->arch
.ppr
= set_reg_val(id
, *val
);
1413 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1414 case KVM_REG_PPC_TFHAR
:
1415 vcpu
->arch
.tfhar
= set_reg_val(id
, *val
);
1417 case KVM_REG_PPC_TFIAR
:
1418 vcpu
->arch
.tfiar
= set_reg_val(id
, *val
);
1420 case KVM_REG_PPC_TEXASR
:
1421 vcpu
->arch
.texasr
= set_reg_val(id
, *val
);
1423 case KVM_REG_PPC_TM_GPR0
... KVM_REG_PPC_TM_GPR31
:
1424 i
= id
- KVM_REG_PPC_TM_GPR0
;
1425 vcpu
->arch
.gpr_tm
[i
] = set_reg_val(id
, *val
);
1427 case KVM_REG_PPC_TM_VSR0
... KVM_REG_PPC_TM_VSR63
:
1430 i
= id
- KVM_REG_PPC_TM_VSR0
;
1432 for (j
= 0; j
< TS_FPRWIDTH
; j
++)
1433 vcpu
->arch
.fp_tm
.fpr
[i
][j
] = val
->vsxval
[j
];
1435 if (cpu_has_feature(CPU_FTR_ALTIVEC
))
1436 vcpu
->arch
.vr_tm
.vr
[i
-32] = val
->vval
;
1441 case KVM_REG_PPC_TM_CR
:
1442 vcpu
->arch
.cr_tm
= set_reg_val(id
, *val
);
1444 case KVM_REG_PPC_TM_LR
:
1445 vcpu
->arch
.lr_tm
= set_reg_val(id
, *val
);
1447 case KVM_REG_PPC_TM_CTR
:
1448 vcpu
->arch
.ctr_tm
= set_reg_val(id
, *val
);
1450 case KVM_REG_PPC_TM_FPSCR
:
1451 vcpu
->arch
.fp_tm
.fpscr
= set_reg_val(id
, *val
);
1453 case KVM_REG_PPC_TM_AMR
:
1454 vcpu
->arch
.amr_tm
= set_reg_val(id
, *val
);
1456 case KVM_REG_PPC_TM_PPR
:
1457 vcpu
->arch
.ppr_tm
= set_reg_val(id
, *val
);
1459 case KVM_REG_PPC_TM_VRSAVE
:
1460 vcpu
->arch
.vrsave_tm
= set_reg_val(id
, *val
);
1462 case KVM_REG_PPC_TM_VSCR
:
1463 if (cpu_has_feature(CPU_FTR_ALTIVEC
))
1464 vcpu
->arch
.vr
.vscr
.u
[3] = set_reg_val(id
, *val
);
1468 case KVM_REG_PPC_TM_DSCR
:
1469 vcpu
->arch
.dscr_tm
= set_reg_val(id
, *val
);
1471 case KVM_REG_PPC_TM_TAR
:
1472 vcpu
->arch
.tar_tm
= set_reg_val(id
, *val
);
1475 case KVM_REG_PPC_ARCH_COMPAT
:
1476 r
= kvmppc_set_arch_compat(vcpu
, set_reg_val(id
, *val
));
1486 static struct kvmppc_vcore
*kvmppc_vcore_create(struct kvm
*kvm
, int core
)
1488 struct kvmppc_vcore
*vcore
;
1490 vcore
= kzalloc(sizeof(struct kvmppc_vcore
), GFP_KERNEL
);
1495 INIT_LIST_HEAD(&vcore
->runnable_threads
);
1496 spin_lock_init(&vcore
->lock
);
1497 spin_lock_init(&vcore
->stoltb_lock
);
1498 init_swait_queue_head(&vcore
->wq
);
1499 vcore
->preempt_tb
= TB_NIL
;
1500 vcore
->lpcr
= kvm
->arch
.lpcr
;
1501 vcore
->first_vcpuid
= core
* threads_per_subcore
;
1503 INIT_LIST_HEAD(&vcore
->preempt_list
);
1508 #ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING
1509 static struct debugfs_timings_element
{
1513 {"rm_entry", offsetof(struct kvm_vcpu
, arch
.rm_entry
)},
1514 {"rm_intr", offsetof(struct kvm_vcpu
, arch
.rm_intr
)},
1515 {"rm_exit", offsetof(struct kvm_vcpu
, arch
.rm_exit
)},
1516 {"guest", offsetof(struct kvm_vcpu
, arch
.guest_time
)},
1517 {"cede", offsetof(struct kvm_vcpu
, arch
.cede_time
)},
1520 #define N_TIMINGS (sizeof(timings) / sizeof(timings[0]))
1522 struct debugfs_timings_state
{
1523 struct kvm_vcpu
*vcpu
;
1524 unsigned int buflen
;
1525 char buf
[N_TIMINGS
* 100];
1528 static int debugfs_timings_open(struct inode
*inode
, struct file
*file
)
1530 struct kvm_vcpu
*vcpu
= inode
->i_private
;
1531 struct debugfs_timings_state
*p
;
1533 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
1537 kvm_get_kvm(vcpu
->kvm
);
1539 file
->private_data
= p
;
1541 return nonseekable_open(inode
, file
);
1544 static int debugfs_timings_release(struct inode
*inode
, struct file
*file
)
1546 struct debugfs_timings_state
*p
= file
->private_data
;
1548 kvm_put_kvm(p
->vcpu
->kvm
);
1553 static ssize_t
debugfs_timings_read(struct file
*file
, char __user
*buf
,
1554 size_t len
, loff_t
*ppos
)
1556 struct debugfs_timings_state
*p
= file
->private_data
;
1557 struct kvm_vcpu
*vcpu
= p
->vcpu
;
1559 struct kvmhv_tb_accumulator tb
;
1568 buf_end
= s
+ sizeof(p
->buf
);
1569 for (i
= 0; i
< N_TIMINGS
; ++i
) {
1570 struct kvmhv_tb_accumulator
*acc
;
1572 acc
= (struct kvmhv_tb_accumulator
*)
1573 ((unsigned long)vcpu
+ timings
[i
].offset
);
1575 for (loops
= 0; loops
< 1000; ++loops
) {
1576 count
= acc
->seqcount
;
1581 if (count
== acc
->seqcount
) {
1589 snprintf(s
, buf_end
- s
, "%s: stuck\n",
1592 snprintf(s
, buf_end
- s
,
1593 "%s: %llu %llu %llu %llu\n",
1594 timings
[i
].name
, count
/ 2,
1595 tb_to_ns(tb
.tb_total
),
1596 tb_to_ns(tb
.tb_min
),
1597 tb_to_ns(tb
.tb_max
));
1600 p
->buflen
= s
- p
->buf
;
1604 if (pos
>= p
->buflen
)
1606 if (len
> p
->buflen
- pos
)
1607 len
= p
->buflen
- pos
;
1608 n
= copy_to_user(buf
, p
->buf
+ pos
, len
);
1618 static ssize_t
debugfs_timings_write(struct file
*file
, const char __user
*buf
,
1619 size_t len
, loff_t
*ppos
)
1624 static const struct file_operations debugfs_timings_ops
= {
1625 .owner
= THIS_MODULE
,
1626 .open
= debugfs_timings_open
,
1627 .release
= debugfs_timings_release
,
1628 .read
= debugfs_timings_read
,
1629 .write
= debugfs_timings_write
,
1630 .llseek
= generic_file_llseek
,
1633 /* Create a debugfs directory for the vcpu */
1634 static void debugfs_vcpu_init(struct kvm_vcpu
*vcpu
, unsigned int id
)
1637 struct kvm
*kvm
= vcpu
->kvm
;
1639 snprintf(buf
, sizeof(buf
), "vcpu%u", id
);
1640 if (IS_ERR_OR_NULL(kvm
->arch
.debugfs_dir
))
1642 vcpu
->arch
.debugfs_dir
= debugfs_create_dir(buf
, kvm
->arch
.debugfs_dir
);
1643 if (IS_ERR_OR_NULL(vcpu
->arch
.debugfs_dir
))
1645 vcpu
->arch
.debugfs_timings
=
1646 debugfs_create_file("timings", 0444, vcpu
->arch
.debugfs_dir
,
1647 vcpu
, &debugfs_timings_ops
);
1650 #else /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */
1651 static void debugfs_vcpu_init(struct kvm_vcpu
*vcpu
, unsigned int id
)
1654 #endif /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */
1656 static struct kvm_vcpu
*kvmppc_core_vcpu_create_hv(struct kvm
*kvm
,
1659 struct kvm_vcpu
*vcpu
;
1662 struct kvmppc_vcore
*vcore
;
1664 core
= id
/ threads_per_subcore
;
1665 if (core
>= KVM_MAX_VCORES
)
1669 vcpu
= kmem_cache_zalloc(kvm_vcpu_cache
, GFP_KERNEL
);
1673 err
= kvm_vcpu_init(vcpu
, kvm
, id
);
1677 vcpu
->arch
.shared
= &vcpu
->arch
.shregs
;
1678 #ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE
1680 * The shared struct is never shared on HV,
1681 * so we can always use host endianness
1683 #ifdef __BIG_ENDIAN__
1684 vcpu
->arch
.shared_big_endian
= true;
1686 vcpu
->arch
.shared_big_endian
= false;
1689 vcpu
->arch
.mmcr
[0] = MMCR0_FC
;
1690 vcpu
->arch
.ctrl
= CTRL_RUNLATCH
;
1691 /* default to host PVR, since we can't spoof it */
1692 kvmppc_set_pvr_hv(vcpu
, mfspr(SPRN_PVR
));
1693 spin_lock_init(&vcpu
->arch
.vpa_update_lock
);
1694 spin_lock_init(&vcpu
->arch
.tbacct_lock
);
1695 vcpu
->arch
.busy_preempt
= TB_NIL
;
1696 vcpu
->arch
.intr_msr
= MSR_SF
| MSR_ME
;
1698 kvmppc_mmu_book3s_hv_init(vcpu
);
1700 vcpu
->arch
.state
= KVMPPC_VCPU_NOTREADY
;
1702 init_waitqueue_head(&vcpu
->arch
.cpu_run
);
1704 mutex_lock(&kvm
->lock
);
1705 vcore
= kvm
->arch
.vcores
[core
];
1707 vcore
= kvmppc_vcore_create(kvm
, core
);
1708 kvm
->arch
.vcores
[core
] = vcore
;
1709 kvm
->arch
.online_vcores
++;
1711 mutex_unlock(&kvm
->lock
);
1716 spin_lock(&vcore
->lock
);
1717 ++vcore
->num_threads
;
1718 spin_unlock(&vcore
->lock
);
1719 vcpu
->arch
.vcore
= vcore
;
1720 vcpu
->arch
.ptid
= vcpu
->vcpu_id
- vcore
->first_vcpuid
;
1721 vcpu
->arch
.thread_cpu
= -1;
1723 vcpu
->arch
.cpu_type
= KVM_CPU_3S_64
;
1724 kvmppc_sanity_check(vcpu
);
1726 debugfs_vcpu_init(vcpu
, id
);
1731 kmem_cache_free(kvm_vcpu_cache
, vcpu
);
1733 return ERR_PTR(err
);
1736 static void unpin_vpa(struct kvm
*kvm
, struct kvmppc_vpa
*vpa
)
1738 if (vpa
->pinned_addr
)
1739 kvmppc_unpin_guest_page(kvm
, vpa
->pinned_addr
, vpa
->gpa
,
1743 static void kvmppc_core_vcpu_free_hv(struct kvm_vcpu
*vcpu
)
1745 spin_lock(&vcpu
->arch
.vpa_update_lock
);
1746 unpin_vpa(vcpu
->kvm
, &vcpu
->arch
.dtl
);
1747 unpin_vpa(vcpu
->kvm
, &vcpu
->arch
.slb_shadow
);
1748 unpin_vpa(vcpu
->kvm
, &vcpu
->arch
.vpa
);
1749 spin_unlock(&vcpu
->arch
.vpa_update_lock
);
1750 kvm_vcpu_uninit(vcpu
);
1751 kmem_cache_free(kvm_vcpu_cache
, vcpu
);
1754 static int kvmppc_core_check_requests_hv(struct kvm_vcpu
*vcpu
)
1756 /* Indicate we want to get back into the guest */
1760 static void kvmppc_set_timer(struct kvm_vcpu
*vcpu
)
1762 unsigned long dec_nsec
, now
;
1765 if (now
> vcpu
->arch
.dec_expires
) {
1766 /* decrementer has already gone negative */
1767 kvmppc_core_queue_dec(vcpu
);
1768 kvmppc_core_prepare_to_enter(vcpu
);
1771 dec_nsec
= (vcpu
->arch
.dec_expires
- now
) * NSEC_PER_SEC
1773 hrtimer_start(&vcpu
->arch
.dec_timer
, ktime_set(0, dec_nsec
),
1775 vcpu
->arch
.timer_running
= 1;
1778 static void kvmppc_end_cede(struct kvm_vcpu
*vcpu
)
1780 vcpu
->arch
.ceded
= 0;
1781 if (vcpu
->arch
.timer_running
) {
1782 hrtimer_try_to_cancel(&vcpu
->arch
.dec_timer
);
1783 vcpu
->arch
.timer_running
= 0;
1787 extern void __kvmppc_vcore_entry(void);
1789 static void kvmppc_remove_runnable(struct kvmppc_vcore
*vc
,
1790 struct kvm_vcpu
*vcpu
)
1794 if (vcpu
->arch
.state
!= KVMPPC_VCPU_RUNNABLE
)
1796 spin_lock_irq(&vcpu
->arch
.tbacct_lock
);
1798 vcpu
->arch
.busy_stolen
+= vcore_stolen_time(vc
, now
) -
1799 vcpu
->arch
.stolen_logged
;
1800 vcpu
->arch
.busy_preempt
= now
;
1801 vcpu
->arch
.state
= KVMPPC_VCPU_BUSY_IN_HOST
;
1802 spin_unlock_irq(&vcpu
->arch
.tbacct_lock
);
1804 list_del(&vcpu
->arch
.run_list
);
1807 static int kvmppc_grab_hwthread(int cpu
)
1809 struct paca_struct
*tpaca
;
1810 long timeout
= 10000;
1814 /* Ensure the thread won't go into the kernel if it wakes */
1815 tpaca
->kvm_hstate
.kvm_vcpu
= NULL
;
1816 tpaca
->kvm_hstate
.kvm_vcore
= NULL
;
1817 tpaca
->kvm_hstate
.napping
= 0;
1819 tpaca
->kvm_hstate
.hwthread_req
= 1;
1822 * If the thread is already executing in the kernel (e.g. handling
1823 * a stray interrupt), wait for it to get back to nap mode.
1824 * The smp_mb() is to ensure that our setting of hwthread_req
1825 * is visible before we look at hwthread_state, so if this
1826 * races with the code at system_reset_pSeries and the thread
1827 * misses our setting of hwthread_req, we are sure to see its
1828 * setting of hwthread_state, and vice versa.
1831 while (tpaca
->kvm_hstate
.hwthread_state
== KVM_HWTHREAD_IN_KERNEL
) {
1832 if (--timeout
<= 0) {
1833 pr_err("KVM: couldn't grab cpu %d\n", cpu
);
1841 static void kvmppc_release_hwthread(int cpu
)
1843 struct paca_struct
*tpaca
;
1846 tpaca
->kvm_hstate
.hwthread_req
= 0;
1847 tpaca
->kvm_hstate
.kvm_vcpu
= NULL
;
1848 tpaca
->kvm_hstate
.kvm_vcore
= NULL
;
1849 tpaca
->kvm_hstate
.kvm_split_mode
= NULL
;
1852 static void kvmppc_start_thread(struct kvm_vcpu
*vcpu
, struct kvmppc_vcore
*vc
)
1855 struct paca_struct
*tpaca
;
1856 struct kvmppc_vcore
*mvc
= vc
->master_vcore
;
1860 if (vcpu
->arch
.timer_running
) {
1861 hrtimer_try_to_cancel(&vcpu
->arch
.dec_timer
);
1862 vcpu
->arch
.timer_running
= 0;
1864 cpu
+= vcpu
->arch
.ptid
;
1865 vcpu
->cpu
= mvc
->pcpu
;
1866 vcpu
->arch
.thread_cpu
= cpu
;
1869 tpaca
->kvm_hstate
.kvm_vcpu
= vcpu
;
1870 tpaca
->kvm_hstate
.ptid
= cpu
- mvc
->pcpu
;
1871 /* Order stores to hstate.kvm_vcpu etc. before store to kvm_vcore */
1873 tpaca
->kvm_hstate
.kvm_vcore
= mvc
;
1874 if (cpu
!= smp_processor_id())
1875 kvmppc_ipi_thread(cpu
);
1878 static void kvmppc_wait_for_nap(void)
1880 int cpu
= smp_processor_id();
1883 for (loops
= 0; loops
< 1000000; ++loops
) {
1885 * Check if all threads are finished.
1886 * We set the vcore pointer when starting a thread
1887 * and the thread clears it when finished, so we look
1888 * for any threads that still have a non-NULL vcore ptr.
1890 for (i
= 1; i
< threads_per_subcore
; ++i
)
1891 if (paca
[cpu
+ i
].kvm_hstate
.kvm_vcore
)
1893 if (i
== threads_per_subcore
) {
1900 for (i
= 1; i
< threads_per_subcore
; ++i
)
1901 if (paca
[cpu
+ i
].kvm_hstate
.kvm_vcore
)
1902 pr_err("KVM: CPU %d seems to be stuck\n", cpu
+ i
);
1906 * Check that we are on thread 0 and that any other threads in
1907 * this core are off-line. Then grab the threads so they can't
1910 static int on_primary_thread(void)
1912 int cpu
= smp_processor_id();
1915 /* Are we on a primary subcore? */
1916 if (cpu_thread_in_subcore(cpu
))
1920 while (++thr
< threads_per_subcore
)
1921 if (cpu_online(cpu
+ thr
))
1924 /* Grab all hw threads so they can't go into the kernel */
1925 for (thr
= 1; thr
< threads_per_subcore
; ++thr
) {
1926 if (kvmppc_grab_hwthread(cpu
+ thr
)) {
1927 /* Couldn't grab one; let the others go */
1929 kvmppc_release_hwthread(cpu
+ thr
);
1930 } while (--thr
> 0);
1938 * A list of virtual cores for each physical CPU.
1939 * These are vcores that could run but their runner VCPU tasks are
1940 * (or may be) preempted.
1942 struct preempted_vcore_list
{
1943 struct list_head list
;
1947 static DEFINE_PER_CPU(struct preempted_vcore_list
, preempted_vcores
);
1949 static void init_vcore_lists(void)
1953 for_each_possible_cpu(cpu
) {
1954 struct preempted_vcore_list
*lp
= &per_cpu(preempted_vcores
, cpu
);
1955 spin_lock_init(&lp
->lock
);
1956 INIT_LIST_HEAD(&lp
->list
);
1960 static void kvmppc_vcore_preempt(struct kvmppc_vcore
*vc
)
1962 struct preempted_vcore_list
*lp
= this_cpu_ptr(&preempted_vcores
);
1964 vc
->vcore_state
= VCORE_PREEMPT
;
1965 vc
->pcpu
= smp_processor_id();
1966 if (vc
->num_threads
< threads_per_subcore
) {
1967 spin_lock(&lp
->lock
);
1968 list_add_tail(&vc
->preempt_list
, &lp
->list
);
1969 spin_unlock(&lp
->lock
);
1972 /* Start accumulating stolen time */
1973 kvmppc_core_start_stolen(vc
);
1976 static void kvmppc_vcore_end_preempt(struct kvmppc_vcore
*vc
)
1978 struct preempted_vcore_list
*lp
;
1980 kvmppc_core_end_stolen(vc
);
1981 if (!list_empty(&vc
->preempt_list
)) {
1982 lp
= &per_cpu(preempted_vcores
, vc
->pcpu
);
1983 spin_lock(&lp
->lock
);
1984 list_del_init(&vc
->preempt_list
);
1985 spin_unlock(&lp
->lock
);
1987 vc
->vcore_state
= VCORE_INACTIVE
;
1991 * This stores information about the virtual cores currently
1992 * assigned to a physical core.
1996 int max_subcore_threads
;
1998 int subcore_threads
[MAX_SUBCORES
];
1999 struct kvm
*subcore_vm
[MAX_SUBCORES
];
2000 struct list_head vcs
[MAX_SUBCORES
];
2004 * This mapping means subcores 0 and 1 can use threads 0-3 and 4-7
2005 * respectively in 2-way micro-threading (split-core) mode.
2007 static int subcore_thread_map
[MAX_SUBCORES
] = { 0, 4, 2, 6 };
2009 static void init_core_info(struct core_info
*cip
, struct kvmppc_vcore
*vc
)
2013 memset(cip
, 0, sizeof(*cip
));
2014 cip
->n_subcores
= 1;
2015 cip
->max_subcore_threads
= vc
->num_threads
;
2016 cip
->total_threads
= vc
->num_threads
;
2017 cip
->subcore_threads
[0] = vc
->num_threads
;
2018 cip
->subcore_vm
[0] = vc
->kvm
;
2019 for (sub
= 0; sub
< MAX_SUBCORES
; ++sub
)
2020 INIT_LIST_HEAD(&cip
->vcs
[sub
]);
2021 list_add_tail(&vc
->preempt_list
, &cip
->vcs
[0]);
2024 static bool subcore_config_ok(int n_subcores
, int n_threads
)
2026 /* Can only dynamically split if unsplit to begin with */
2027 if (n_subcores
> 1 && threads_per_subcore
< MAX_SMT_THREADS
)
2029 if (n_subcores
> MAX_SUBCORES
)
2031 if (n_subcores
> 1) {
2032 if (!(dynamic_mt_modes
& 2))
2034 if (n_subcores
> 2 && !(dynamic_mt_modes
& 4))
2038 return n_subcores
* roundup_pow_of_two(n_threads
) <= MAX_SMT_THREADS
;
2041 static void init_master_vcore(struct kvmppc_vcore
*vc
)
2043 vc
->master_vcore
= vc
;
2044 vc
->entry_exit_map
= 0;
2046 vc
->napping_threads
= 0;
2047 vc
->conferring_threads
= 0;
2051 * See if the existing subcores can be split into 3 (or fewer) subcores
2052 * of at most two threads each, so we can fit in another vcore. This
2053 * assumes there are at most two subcores and at most 6 threads in total.
2055 static bool can_split_piggybacked_subcores(struct core_info
*cip
)
2060 int n_subcores
= cip
->n_subcores
;
2061 struct kvmppc_vcore
*vc
, *vcnext
;
2062 struct kvmppc_vcore
*master_vc
= NULL
;
2064 for (sub
= 0; sub
< cip
->n_subcores
; ++sub
) {
2065 if (cip
->subcore_threads
[sub
] <= 2)
2070 vc
= list_first_entry(&cip
->vcs
[sub
], struct kvmppc_vcore
,
2072 if (vc
->num_threads
> 2)
2074 n_subcores
+= (cip
->subcore_threads
[sub
] - 1) >> 1;
2076 if (large_sub
< 0 || !subcore_config_ok(n_subcores
+ 1, 2))
2080 * Seems feasible, so go through and move vcores to new subcores.
2081 * Note that when we have two or more vcores in one subcore,
2082 * all those vcores must have only one thread each.
2084 new_sub
= cip
->n_subcores
;
2087 list_for_each_entry_safe(vc
, vcnext
, &cip
->vcs
[sub
], preempt_list
) {
2089 list_del(&vc
->preempt_list
);
2090 list_add_tail(&vc
->preempt_list
, &cip
->vcs
[new_sub
]);
2091 /* vc->num_threads must be 1 */
2092 if (++cip
->subcore_threads
[new_sub
] == 1) {
2093 cip
->subcore_vm
[new_sub
] = vc
->kvm
;
2094 init_master_vcore(vc
);
2098 vc
->master_vcore
= master_vc
;
2102 thr
+= vc
->num_threads
;
2104 cip
->subcore_threads
[large_sub
] = 2;
2105 cip
->max_subcore_threads
= 2;
2110 static bool can_dynamic_split(struct kvmppc_vcore
*vc
, struct core_info
*cip
)
2112 int n_threads
= vc
->num_threads
;
2115 if (!cpu_has_feature(CPU_FTR_ARCH_207S
))
2118 if (n_threads
< cip
->max_subcore_threads
)
2119 n_threads
= cip
->max_subcore_threads
;
2120 if (subcore_config_ok(cip
->n_subcores
+ 1, n_threads
)) {
2121 cip
->max_subcore_threads
= n_threads
;
2122 } else if (cip
->n_subcores
<= 2 && cip
->total_threads
<= 6 &&
2123 vc
->num_threads
<= 2) {
2125 * We may be able to fit another subcore in by
2126 * splitting an existing subcore with 3 or 4
2127 * threads into two 2-thread subcores, or one
2128 * with 5 or 6 threads into three subcores.
2129 * We can only do this if those subcores have
2130 * piggybacked virtual cores.
2132 if (!can_split_piggybacked_subcores(cip
))
2138 sub
= cip
->n_subcores
;
2140 cip
->total_threads
+= vc
->num_threads
;
2141 cip
->subcore_threads
[sub
] = vc
->num_threads
;
2142 cip
->subcore_vm
[sub
] = vc
->kvm
;
2143 init_master_vcore(vc
);
2144 list_del(&vc
->preempt_list
);
2145 list_add_tail(&vc
->preempt_list
, &cip
->vcs
[sub
]);
2150 static bool can_piggyback_subcore(struct kvmppc_vcore
*pvc
,
2151 struct core_info
*cip
, int sub
)
2153 struct kvmppc_vcore
*vc
;
2156 vc
= list_first_entry(&cip
->vcs
[sub
], struct kvmppc_vcore
,
2159 /* require same VM and same per-core reg values */
2160 if (pvc
->kvm
!= vc
->kvm
||
2161 pvc
->tb_offset
!= vc
->tb_offset
||
2162 pvc
->pcr
!= vc
->pcr
||
2163 pvc
->lpcr
!= vc
->lpcr
)
2166 /* P8 guest with > 1 thread per core would see wrong TIR value */
2167 if (cpu_has_feature(CPU_FTR_ARCH_207S
) &&
2168 (vc
->num_threads
> 1 || pvc
->num_threads
> 1))
2171 n_thr
= cip
->subcore_threads
[sub
] + pvc
->num_threads
;
2172 if (n_thr
> cip
->max_subcore_threads
) {
2173 if (!subcore_config_ok(cip
->n_subcores
, n_thr
))
2175 cip
->max_subcore_threads
= n_thr
;
2178 cip
->total_threads
+= pvc
->num_threads
;
2179 cip
->subcore_threads
[sub
] = n_thr
;
2180 pvc
->master_vcore
= vc
;
2181 list_del(&pvc
->preempt_list
);
2182 list_add_tail(&pvc
->preempt_list
, &cip
->vcs
[sub
]);
2188 * Work out whether it is possible to piggyback the execution of
2189 * vcore *pvc onto the execution of the other vcores described in *cip.
2191 static bool can_piggyback(struct kvmppc_vcore
*pvc
, struct core_info
*cip
,
2196 if (cip
->total_threads
+ pvc
->num_threads
> target_threads
)
2198 for (sub
= 0; sub
< cip
->n_subcores
; ++sub
)
2199 if (cip
->subcore_threads
[sub
] &&
2200 can_piggyback_subcore(pvc
, cip
, sub
))
2203 if (can_dynamic_split(pvc
, cip
))
2209 static void prepare_threads(struct kvmppc_vcore
*vc
)
2211 struct kvm_vcpu
*vcpu
, *vnext
;
2213 list_for_each_entry_safe(vcpu
, vnext
, &vc
->runnable_threads
,
2215 if (signal_pending(vcpu
->arch
.run_task
))
2216 vcpu
->arch
.ret
= -EINTR
;
2217 else if (vcpu
->arch
.vpa
.update_pending
||
2218 vcpu
->arch
.slb_shadow
.update_pending
||
2219 vcpu
->arch
.dtl
.update_pending
)
2220 vcpu
->arch
.ret
= RESUME_GUEST
;
2223 kvmppc_remove_runnable(vc
, vcpu
);
2224 wake_up(&vcpu
->arch
.cpu_run
);
2228 static void collect_piggybacks(struct core_info
*cip
, int target_threads
)
2230 struct preempted_vcore_list
*lp
= this_cpu_ptr(&preempted_vcores
);
2231 struct kvmppc_vcore
*pvc
, *vcnext
;
2233 spin_lock(&lp
->lock
);
2234 list_for_each_entry_safe(pvc
, vcnext
, &lp
->list
, preempt_list
) {
2235 if (!spin_trylock(&pvc
->lock
))
2237 prepare_threads(pvc
);
2238 if (!pvc
->n_runnable
) {
2239 list_del_init(&pvc
->preempt_list
);
2240 if (pvc
->runner
== NULL
) {
2241 pvc
->vcore_state
= VCORE_INACTIVE
;
2242 kvmppc_core_end_stolen(pvc
);
2244 spin_unlock(&pvc
->lock
);
2247 if (!can_piggyback(pvc
, cip
, target_threads
)) {
2248 spin_unlock(&pvc
->lock
);
2251 kvmppc_core_end_stolen(pvc
);
2252 pvc
->vcore_state
= VCORE_PIGGYBACK
;
2253 if (cip
->total_threads
>= target_threads
)
2256 spin_unlock(&lp
->lock
);
2259 static void post_guest_process(struct kvmppc_vcore
*vc
, bool is_master
)
2261 int still_running
= 0;
2264 struct kvm_vcpu
*vcpu
, *vnext
;
2266 spin_lock(&vc
->lock
);
2268 list_for_each_entry_safe(vcpu
, vnext
, &vc
->runnable_threads
,
2270 /* cancel pending dec exception if dec is positive */
2271 if (now
< vcpu
->arch
.dec_expires
&&
2272 kvmppc_core_pending_dec(vcpu
))
2273 kvmppc_core_dequeue_dec(vcpu
);
2275 trace_kvm_guest_exit(vcpu
);
2278 if (vcpu
->arch
.trap
)
2279 ret
= kvmppc_handle_exit_hv(vcpu
->arch
.kvm_run
, vcpu
,
2280 vcpu
->arch
.run_task
);
2282 vcpu
->arch
.ret
= ret
;
2283 vcpu
->arch
.trap
= 0;
2285 if (is_kvmppc_resume_guest(vcpu
->arch
.ret
)) {
2286 if (vcpu
->arch
.pending_exceptions
)
2287 kvmppc_core_prepare_to_enter(vcpu
);
2288 if (vcpu
->arch
.ceded
)
2289 kvmppc_set_timer(vcpu
);
2293 kvmppc_remove_runnable(vc
, vcpu
);
2294 wake_up(&vcpu
->arch
.cpu_run
);
2297 list_del_init(&vc
->preempt_list
);
2299 if (still_running
> 0) {
2300 kvmppc_vcore_preempt(vc
);
2301 } else if (vc
->runner
) {
2302 vc
->vcore_state
= VCORE_PREEMPT
;
2303 kvmppc_core_start_stolen(vc
);
2305 vc
->vcore_state
= VCORE_INACTIVE
;
2307 if (vc
->n_runnable
> 0 && vc
->runner
== NULL
) {
2308 /* make sure there's a candidate runner awake */
2309 vcpu
= list_first_entry(&vc
->runnable_threads
,
2310 struct kvm_vcpu
, arch
.run_list
);
2311 wake_up(&vcpu
->arch
.cpu_run
);
2314 spin_unlock(&vc
->lock
);
2318 * Clear core from the list of active host cores as we are about to
2319 * enter the guest. Only do this if it is the primary thread of the
2320 * core (not if a subcore) that is entering the guest.
2322 static inline void kvmppc_clear_host_core(int cpu
)
2326 if (!kvmppc_host_rm_ops_hv
|| cpu_thread_in_core(cpu
))
2329 * Memory barrier can be omitted here as we will do a smp_wmb()
2330 * later in kvmppc_start_thread and we need ensure that state is
2331 * visible to other CPUs only after we enter guest.
2333 core
= cpu
>> threads_shift
;
2334 kvmppc_host_rm_ops_hv
->rm_core
[core
].rm_state
.in_host
= 0;
2338 * Advertise this core as an active host core since we exited the guest
2339 * Only need to do this if it is the primary thread of the core that is
2342 static inline void kvmppc_set_host_core(int cpu
)
2346 if (!kvmppc_host_rm_ops_hv
|| cpu_thread_in_core(cpu
))
2350 * Memory barrier can be omitted here because we do a spin_unlock
2351 * immediately after this which provides the memory barrier.
2353 core
= cpu
>> threads_shift
;
2354 kvmppc_host_rm_ops_hv
->rm_core
[core
].rm_state
.in_host
= 1;
2358 * Run a set of guest threads on a physical core.
2359 * Called with vc->lock held.
2361 static noinline
void kvmppc_run_core(struct kvmppc_vcore
*vc
)
2363 struct kvm_vcpu
*vcpu
, *vnext
;
2366 struct core_info core_info
;
2367 struct kvmppc_vcore
*pvc
, *vcnext
;
2368 struct kvm_split_mode split_info
, *sip
;
2369 int split
, subcore_size
, active
;
2372 unsigned long cmd_bit
, stat_bit
;
2377 * Remove from the list any threads that have a signal pending
2378 * or need a VPA update done
2380 prepare_threads(vc
);
2382 /* if the runner is no longer runnable, let the caller pick a new one */
2383 if (vc
->runner
->arch
.state
!= KVMPPC_VCPU_RUNNABLE
)
2389 init_master_vcore(vc
);
2390 vc
->preempt_tb
= TB_NIL
;
2393 * Make sure we are running on primary threads, and that secondary
2394 * threads are offline. Also check if the number of threads in this
2395 * guest are greater than the current system threads per guest.
2397 if ((threads_per_core
> 1) &&
2398 ((vc
->num_threads
> threads_per_subcore
) || !on_primary_thread())) {
2399 list_for_each_entry_safe(vcpu
, vnext
, &vc
->runnable_threads
,
2401 vcpu
->arch
.ret
= -EBUSY
;
2402 kvmppc_remove_runnable(vc
, vcpu
);
2403 wake_up(&vcpu
->arch
.cpu_run
);
2409 * See if we could run any other vcores on the physical core
2410 * along with this one.
2412 init_core_info(&core_info
, vc
);
2413 pcpu
= smp_processor_id();
2414 target_threads
= threads_per_subcore
;
2415 if (target_smt_mode
&& target_smt_mode
< target_threads
)
2416 target_threads
= target_smt_mode
;
2417 if (vc
->num_threads
< target_threads
)
2418 collect_piggybacks(&core_info
, target_threads
);
2420 /* Decide on micro-threading (split-core) mode */
2421 subcore_size
= threads_per_subcore
;
2422 cmd_bit
= stat_bit
= 0;
2423 split
= core_info
.n_subcores
;
2426 /* threads_per_subcore must be MAX_SMT_THREADS (8) here */
2427 if (split
== 2 && (dynamic_mt_modes
& 2)) {
2428 cmd_bit
= HID0_POWER8_1TO2LPAR
;
2429 stat_bit
= HID0_POWER8_2LPARMODE
;
2432 cmd_bit
= HID0_POWER8_1TO4LPAR
;
2433 stat_bit
= HID0_POWER8_4LPARMODE
;
2435 subcore_size
= MAX_SMT_THREADS
/ split
;
2437 memset(&split_info
, 0, sizeof(split_info
));
2438 split_info
.rpr
= mfspr(SPRN_RPR
);
2439 split_info
.pmmar
= mfspr(SPRN_PMMAR
);
2440 split_info
.ldbar
= mfspr(SPRN_LDBAR
);
2441 split_info
.subcore_size
= subcore_size
;
2442 for (sub
= 0; sub
< core_info
.n_subcores
; ++sub
)
2443 split_info
.master_vcs
[sub
] =
2444 list_first_entry(&core_info
.vcs
[sub
],
2445 struct kvmppc_vcore
, preempt_list
);
2446 /* order writes to split_info before kvm_split_mode pointer */
2449 pcpu
= smp_processor_id();
2450 for (thr
= 0; thr
< threads_per_subcore
; ++thr
)
2451 paca
[pcpu
+ thr
].kvm_hstate
.kvm_split_mode
= sip
;
2453 /* Initiate micro-threading (split-core) if required */
2455 unsigned long hid0
= mfspr(SPRN_HID0
);
2457 hid0
|= cmd_bit
| HID0_POWER8_DYNLPARDIS
;
2459 mtspr(SPRN_HID0
, hid0
);
2462 hid0
= mfspr(SPRN_HID0
);
2463 if (hid0
& stat_bit
)
2469 kvmppc_clear_host_core(pcpu
);
2471 /* Start all the threads */
2473 for (sub
= 0; sub
< core_info
.n_subcores
; ++sub
) {
2474 thr
= subcore_thread_map
[sub
];
2477 list_for_each_entry(pvc
, &core_info
.vcs
[sub
], preempt_list
) {
2478 pvc
->pcpu
= pcpu
+ thr
;
2479 list_for_each_entry(vcpu
, &pvc
->runnable_threads
,
2481 kvmppc_start_thread(vcpu
, pvc
);
2482 kvmppc_create_dtl_entry(vcpu
, pvc
);
2483 trace_kvm_guest_enter(vcpu
);
2484 if (!vcpu
->arch
.ptid
)
2486 active
|= 1 << (thr
+ vcpu
->arch
.ptid
);
2489 * We need to start the first thread of each subcore
2490 * even if it doesn't have a vcpu.
2492 if (pvc
->master_vcore
== pvc
&& !thr0_done
)
2493 kvmppc_start_thread(NULL
, pvc
);
2494 thr
+= pvc
->num_threads
;
2499 * Ensure that split_info.do_nap is set after setting
2500 * the vcore pointer in the PACA of the secondaries.
2504 split_info
.do_nap
= 1; /* ask secondaries to nap when done */
2507 * When doing micro-threading, poke the inactive threads as well.
2508 * This gets them to the nap instruction after kvm_do_nap,
2509 * which reduces the time taken to unsplit later.
2512 for (thr
= 1; thr
< threads_per_subcore
; ++thr
)
2513 if (!(active
& (1 << thr
)))
2514 kvmppc_ipi_thread(pcpu
+ thr
);
2516 vc
->vcore_state
= VCORE_RUNNING
;
2519 trace_kvmppc_run_core(vc
, 0);
2521 for (sub
= 0; sub
< core_info
.n_subcores
; ++sub
)
2522 list_for_each_entry(pvc
, &core_info
.vcs
[sub
], preempt_list
)
2523 spin_unlock(&pvc
->lock
);
2527 srcu_idx
= srcu_read_lock(&vc
->kvm
->srcu
);
2529 __kvmppc_vcore_entry();
2531 srcu_read_unlock(&vc
->kvm
->srcu
, srcu_idx
);
2533 spin_lock(&vc
->lock
);
2534 /* prevent other vcpu threads from doing kvmppc_start_thread() now */
2535 vc
->vcore_state
= VCORE_EXITING
;
2537 /* wait for secondary threads to finish writing their state to memory */
2538 kvmppc_wait_for_nap();
2540 /* Return to whole-core mode if we split the core earlier */
2542 unsigned long hid0
= mfspr(SPRN_HID0
);
2543 unsigned long loops
= 0;
2545 hid0
&= ~HID0_POWER8_DYNLPARDIS
;
2546 stat_bit
= HID0_POWER8_2LPARMODE
| HID0_POWER8_4LPARMODE
;
2548 mtspr(SPRN_HID0
, hid0
);
2551 hid0
= mfspr(SPRN_HID0
);
2552 if (!(hid0
& stat_bit
))
2557 split_info
.do_nap
= 0;
2560 /* Let secondaries go back to the offline loop */
2561 for (i
= 0; i
< threads_per_subcore
; ++i
) {
2562 kvmppc_release_hwthread(pcpu
+ i
);
2563 if (sip
&& sip
->napped
[i
])
2564 kvmppc_ipi_thread(pcpu
+ i
);
2567 kvmppc_set_host_core(pcpu
);
2569 spin_unlock(&vc
->lock
);
2571 /* make sure updates to secondary vcpu structs are visible now */
2575 for (sub
= 0; sub
< core_info
.n_subcores
; ++sub
)
2576 list_for_each_entry_safe(pvc
, vcnext
, &core_info
.vcs
[sub
],
2578 post_guest_process(pvc
, pvc
== vc
);
2580 spin_lock(&vc
->lock
);
2584 vc
->vcore_state
= VCORE_INACTIVE
;
2585 trace_kvmppc_run_core(vc
, 1);
2589 * Wait for some other vcpu thread to execute us, and
2590 * wake us up when we need to handle something in the host.
2592 static void kvmppc_wait_for_exec(struct kvmppc_vcore
*vc
,
2593 struct kvm_vcpu
*vcpu
, int wait_state
)
2597 prepare_to_wait(&vcpu
->arch
.cpu_run
, &wait
, wait_state
);
2598 if (vcpu
->arch
.state
== KVMPPC_VCPU_RUNNABLE
) {
2599 spin_unlock(&vc
->lock
);
2601 spin_lock(&vc
->lock
);
2603 finish_wait(&vcpu
->arch
.cpu_run
, &wait
);
2607 * All the vcpus in this vcore are idle, so wait for a decrementer
2608 * or external interrupt to one of the vcpus. vc->lock is held.
2610 static void kvmppc_vcore_blocked(struct kvmppc_vcore
*vc
)
2612 struct kvm_vcpu
*vcpu
;
2614 DECLARE_SWAITQUEUE(wait
);
2616 prepare_to_swait(&vc
->wq
, &wait
, TASK_INTERRUPTIBLE
);
2619 * Check one last time for pending exceptions and ceded state after
2620 * we put ourselves on the wait queue
2622 list_for_each_entry(vcpu
, &vc
->runnable_threads
, arch
.run_list
) {
2623 if (vcpu
->arch
.pending_exceptions
|| !vcpu
->arch
.ceded
) {
2630 finish_swait(&vc
->wq
, &wait
);
2634 vc
->vcore_state
= VCORE_SLEEPING
;
2635 trace_kvmppc_vcore_blocked(vc
, 0);
2636 spin_unlock(&vc
->lock
);
2638 finish_swait(&vc
->wq
, &wait
);
2639 spin_lock(&vc
->lock
);
2640 vc
->vcore_state
= VCORE_INACTIVE
;
2641 trace_kvmppc_vcore_blocked(vc
, 1);
2644 static int kvmppc_run_vcpu(struct kvm_run
*kvm_run
, struct kvm_vcpu
*vcpu
)
2647 struct kvmppc_vcore
*vc
;
2648 struct kvm_vcpu
*v
, *vn
;
2650 trace_kvmppc_run_vcpu_enter(vcpu
);
2652 kvm_run
->exit_reason
= 0;
2653 vcpu
->arch
.ret
= RESUME_GUEST
;
2654 vcpu
->arch
.trap
= 0;
2655 kvmppc_update_vpas(vcpu
);
2658 * Synchronize with other threads in this virtual core
2660 vc
= vcpu
->arch
.vcore
;
2661 spin_lock(&vc
->lock
);
2662 vcpu
->arch
.ceded
= 0;
2663 vcpu
->arch
.run_task
= current
;
2664 vcpu
->arch
.kvm_run
= kvm_run
;
2665 vcpu
->arch
.stolen_logged
= vcore_stolen_time(vc
, mftb());
2666 vcpu
->arch
.state
= KVMPPC_VCPU_RUNNABLE
;
2667 vcpu
->arch
.busy_preempt
= TB_NIL
;
2668 list_add_tail(&vcpu
->arch
.run_list
, &vc
->runnable_threads
);
2672 * This happens the first time this is called for a vcpu.
2673 * If the vcore is already running, we may be able to start
2674 * this thread straight away and have it join in.
2676 if (!signal_pending(current
)) {
2677 if (vc
->vcore_state
== VCORE_PIGGYBACK
) {
2678 struct kvmppc_vcore
*mvc
= vc
->master_vcore
;
2679 if (spin_trylock(&mvc
->lock
)) {
2680 if (mvc
->vcore_state
== VCORE_RUNNING
&&
2681 !VCORE_IS_EXITING(mvc
)) {
2682 kvmppc_create_dtl_entry(vcpu
, vc
);
2683 kvmppc_start_thread(vcpu
, vc
);
2684 trace_kvm_guest_enter(vcpu
);
2686 spin_unlock(&mvc
->lock
);
2688 } else if (vc
->vcore_state
== VCORE_RUNNING
&&
2689 !VCORE_IS_EXITING(vc
)) {
2690 kvmppc_create_dtl_entry(vcpu
, vc
);
2691 kvmppc_start_thread(vcpu
, vc
);
2692 trace_kvm_guest_enter(vcpu
);
2693 } else if (vc
->vcore_state
== VCORE_SLEEPING
) {
2699 while (vcpu
->arch
.state
== KVMPPC_VCPU_RUNNABLE
&&
2700 !signal_pending(current
)) {
2701 if (vc
->vcore_state
== VCORE_PREEMPT
&& vc
->runner
== NULL
)
2702 kvmppc_vcore_end_preempt(vc
);
2704 if (vc
->vcore_state
!= VCORE_INACTIVE
) {
2705 kvmppc_wait_for_exec(vc
, vcpu
, TASK_INTERRUPTIBLE
);
2708 list_for_each_entry_safe(v
, vn
, &vc
->runnable_threads
,
2710 kvmppc_core_prepare_to_enter(v
);
2711 if (signal_pending(v
->arch
.run_task
)) {
2712 kvmppc_remove_runnable(vc
, v
);
2713 v
->stat
.signal_exits
++;
2714 v
->arch
.kvm_run
->exit_reason
= KVM_EXIT_INTR
;
2715 v
->arch
.ret
= -EINTR
;
2716 wake_up(&v
->arch
.cpu_run
);
2719 if (!vc
->n_runnable
|| vcpu
->arch
.state
!= KVMPPC_VCPU_RUNNABLE
)
2722 list_for_each_entry(v
, &vc
->runnable_threads
, arch
.run_list
) {
2723 if (!v
->arch
.pending_exceptions
)
2724 n_ceded
+= v
->arch
.ceded
;
2729 if (n_ceded
== vc
->n_runnable
) {
2730 kvmppc_vcore_blocked(vc
);
2731 } else if (need_resched()) {
2732 kvmppc_vcore_preempt(vc
);
2733 /* Let something else run */
2734 cond_resched_lock(&vc
->lock
);
2735 if (vc
->vcore_state
== VCORE_PREEMPT
)
2736 kvmppc_vcore_end_preempt(vc
);
2738 kvmppc_run_core(vc
);
2743 while (vcpu
->arch
.state
== KVMPPC_VCPU_RUNNABLE
&&
2744 (vc
->vcore_state
== VCORE_RUNNING
||
2745 vc
->vcore_state
== VCORE_EXITING
||
2746 vc
->vcore_state
== VCORE_PIGGYBACK
))
2747 kvmppc_wait_for_exec(vc
, vcpu
, TASK_UNINTERRUPTIBLE
);
2749 if (vc
->vcore_state
== VCORE_PREEMPT
&& vc
->runner
== NULL
)
2750 kvmppc_vcore_end_preempt(vc
);
2752 if (vcpu
->arch
.state
== KVMPPC_VCPU_RUNNABLE
) {
2753 kvmppc_remove_runnable(vc
, vcpu
);
2754 vcpu
->stat
.signal_exits
++;
2755 kvm_run
->exit_reason
= KVM_EXIT_INTR
;
2756 vcpu
->arch
.ret
= -EINTR
;
2759 if (vc
->n_runnable
&& vc
->vcore_state
== VCORE_INACTIVE
) {
2760 /* Wake up some vcpu to run the core */
2761 v
= list_first_entry(&vc
->runnable_threads
,
2762 struct kvm_vcpu
, arch
.run_list
);
2763 wake_up(&v
->arch
.cpu_run
);
2766 trace_kvmppc_run_vcpu_exit(vcpu
, kvm_run
);
2767 spin_unlock(&vc
->lock
);
2768 return vcpu
->arch
.ret
;
2771 static int kvmppc_vcpu_run_hv(struct kvm_run
*run
, struct kvm_vcpu
*vcpu
)
2776 if (!vcpu
->arch
.sane
) {
2777 run
->exit_reason
= KVM_EXIT_INTERNAL_ERROR
;
2781 kvmppc_core_prepare_to_enter(vcpu
);
2783 /* No need to go into the guest when all we'll do is come back out */
2784 if (signal_pending(current
)) {
2785 run
->exit_reason
= KVM_EXIT_INTR
;
2789 atomic_inc(&vcpu
->kvm
->arch
.vcpus_running
);
2790 /* Order vcpus_running vs. hpte_setup_done, see kvmppc_alloc_reset_hpt */
2793 /* On the first time here, set up HTAB and VRMA */
2794 if (!vcpu
->kvm
->arch
.hpte_setup_done
) {
2795 r
= kvmppc_hv_setup_htab_rma(vcpu
);
2800 flush_all_to_thread(current
);
2802 vcpu
->arch
.wqp
= &vcpu
->arch
.vcore
->wq
;
2803 vcpu
->arch
.pgdir
= current
->mm
->pgd
;
2804 vcpu
->arch
.state
= KVMPPC_VCPU_BUSY_IN_HOST
;
2807 r
= kvmppc_run_vcpu(run
, vcpu
);
2809 if (run
->exit_reason
== KVM_EXIT_PAPR_HCALL
&&
2810 !(vcpu
->arch
.shregs
.msr
& MSR_PR
)) {
2811 trace_kvm_hcall_enter(vcpu
);
2812 r
= kvmppc_pseries_do_hcall(vcpu
);
2813 trace_kvm_hcall_exit(vcpu
, r
);
2814 kvmppc_core_prepare_to_enter(vcpu
);
2815 } else if (r
== RESUME_PAGE_FAULT
) {
2816 srcu_idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
2817 r
= kvmppc_book3s_hv_page_fault(run
, vcpu
,
2818 vcpu
->arch
.fault_dar
, vcpu
->arch
.fault_dsisr
);
2819 srcu_read_unlock(&vcpu
->kvm
->srcu
, srcu_idx
);
2821 } while (is_kvmppc_resume_guest(r
));
2824 vcpu
->arch
.state
= KVMPPC_VCPU_NOTREADY
;
2825 atomic_dec(&vcpu
->kvm
->arch
.vcpus_running
);
2829 static void kvmppc_add_seg_page_size(struct kvm_ppc_one_seg_page_size
**sps
,
2832 struct mmu_psize_def
*def
= &mmu_psize_defs
[linux_psize
];
2836 (*sps
)->page_shift
= def
->shift
;
2837 (*sps
)->slb_enc
= def
->sllp
;
2838 (*sps
)->enc
[0].page_shift
= def
->shift
;
2839 (*sps
)->enc
[0].pte_enc
= def
->penc
[linux_psize
];
2841 * Add 16MB MPSS support if host supports it
2843 if (linux_psize
!= MMU_PAGE_16M
&& def
->penc
[MMU_PAGE_16M
] != -1) {
2844 (*sps
)->enc
[1].page_shift
= 24;
2845 (*sps
)->enc
[1].pte_enc
= def
->penc
[MMU_PAGE_16M
];
2850 static int kvm_vm_ioctl_get_smmu_info_hv(struct kvm
*kvm
,
2851 struct kvm_ppc_smmu_info
*info
)
2853 struct kvm_ppc_one_seg_page_size
*sps
;
2855 info
->flags
= KVM_PPC_PAGE_SIZES_REAL
;
2856 if (mmu_has_feature(MMU_FTR_1T_SEGMENT
))
2857 info
->flags
|= KVM_PPC_1T_SEGMENTS
;
2858 info
->slb_size
= mmu_slb_size
;
2860 /* We only support these sizes for now, and no muti-size segments */
2861 sps
= &info
->sps
[0];
2862 kvmppc_add_seg_page_size(&sps
, MMU_PAGE_4K
);
2863 kvmppc_add_seg_page_size(&sps
, MMU_PAGE_64K
);
2864 kvmppc_add_seg_page_size(&sps
, MMU_PAGE_16M
);
2870 * Get (and clear) the dirty memory log for a memory slot.
2872 static int kvm_vm_ioctl_get_dirty_log_hv(struct kvm
*kvm
,
2873 struct kvm_dirty_log
*log
)
2875 struct kvm_memslots
*slots
;
2876 struct kvm_memory_slot
*memslot
;
2880 mutex_lock(&kvm
->slots_lock
);
2883 if (log
->slot
>= KVM_USER_MEM_SLOTS
)
2886 slots
= kvm_memslots(kvm
);
2887 memslot
= id_to_memslot(slots
, log
->slot
);
2889 if (!memslot
->dirty_bitmap
)
2892 n
= kvm_dirty_bitmap_bytes(memslot
);
2893 memset(memslot
->dirty_bitmap
, 0, n
);
2895 r
= kvmppc_hv_get_dirty_log(kvm
, memslot
, memslot
->dirty_bitmap
);
2900 if (copy_to_user(log
->dirty_bitmap
, memslot
->dirty_bitmap
, n
))
2905 mutex_unlock(&kvm
->slots_lock
);
2909 static void kvmppc_core_free_memslot_hv(struct kvm_memory_slot
*free
,
2910 struct kvm_memory_slot
*dont
)
2912 if (!dont
|| free
->arch
.rmap
!= dont
->arch
.rmap
) {
2913 vfree(free
->arch
.rmap
);
2914 free
->arch
.rmap
= NULL
;
2918 static int kvmppc_core_create_memslot_hv(struct kvm_memory_slot
*slot
,
2919 unsigned long npages
)
2921 slot
->arch
.rmap
= vzalloc(npages
* sizeof(*slot
->arch
.rmap
));
2922 if (!slot
->arch
.rmap
)
2928 static int kvmppc_core_prepare_memory_region_hv(struct kvm
*kvm
,
2929 struct kvm_memory_slot
*memslot
,
2930 const struct kvm_userspace_memory_region
*mem
)
2935 static void kvmppc_core_commit_memory_region_hv(struct kvm
*kvm
,
2936 const struct kvm_userspace_memory_region
*mem
,
2937 const struct kvm_memory_slot
*old
,
2938 const struct kvm_memory_slot
*new)
2940 unsigned long npages
= mem
->memory_size
>> PAGE_SHIFT
;
2941 struct kvm_memslots
*slots
;
2942 struct kvm_memory_slot
*memslot
;
2944 if (npages
&& old
->npages
) {
2946 * If modifying a memslot, reset all the rmap dirty bits.
2947 * If this is a new memslot, we don't need to do anything
2948 * since the rmap array starts out as all zeroes,
2949 * i.e. no pages are dirty.
2951 slots
= kvm_memslots(kvm
);
2952 memslot
= id_to_memslot(slots
, mem
->slot
);
2953 kvmppc_hv_get_dirty_log(kvm
, memslot
, NULL
);
2958 * Update LPCR values in kvm->arch and in vcores.
2959 * Caller must hold kvm->lock.
2961 void kvmppc_update_lpcr(struct kvm
*kvm
, unsigned long lpcr
, unsigned long mask
)
2966 if ((kvm
->arch
.lpcr
& mask
) == lpcr
)
2969 kvm
->arch
.lpcr
= (kvm
->arch
.lpcr
& ~mask
) | lpcr
;
2971 for (i
= 0; i
< KVM_MAX_VCORES
; ++i
) {
2972 struct kvmppc_vcore
*vc
= kvm
->arch
.vcores
[i
];
2975 spin_lock(&vc
->lock
);
2976 vc
->lpcr
= (vc
->lpcr
& ~mask
) | lpcr
;
2977 spin_unlock(&vc
->lock
);
2978 if (++cores_done
>= kvm
->arch
.online_vcores
)
2983 static void kvmppc_mmu_destroy_hv(struct kvm_vcpu
*vcpu
)
2988 static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu
*vcpu
)
2991 struct kvm
*kvm
= vcpu
->kvm
;
2993 struct kvm_memory_slot
*memslot
;
2994 struct vm_area_struct
*vma
;
2995 unsigned long lpcr
= 0, senc
;
2996 unsigned long psize
, porder
;
2999 mutex_lock(&kvm
->lock
);
3000 if (kvm
->arch
.hpte_setup_done
)
3001 goto out
; /* another vcpu beat us to it */
3003 /* Allocate hashed page table (if not done already) and reset it */
3004 if (!kvm
->arch
.hpt_virt
) {
3005 err
= kvmppc_alloc_hpt(kvm
, NULL
);
3007 pr_err("KVM: Couldn't alloc HPT\n");
3012 /* Look up the memslot for guest physical address 0 */
3013 srcu_idx
= srcu_read_lock(&kvm
->srcu
);
3014 memslot
= gfn_to_memslot(kvm
, 0);
3016 /* We must have some memory at 0 by now */
3018 if (!memslot
|| (memslot
->flags
& KVM_MEMSLOT_INVALID
))
3021 /* Look up the VMA for the start of this memory slot */
3022 hva
= memslot
->userspace_addr
;
3023 down_read(¤t
->mm
->mmap_sem
);
3024 vma
= find_vma(current
->mm
, hva
);
3025 if (!vma
|| vma
->vm_start
> hva
|| (vma
->vm_flags
& VM_IO
))
3028 psize
= vma_kernel_pagesize(vma
);
3029 porder
= __ilog2(psize
);
3031 up_read(¤t
->mm
->mmap_sem
);
3033 /* We can handle 4k, 64k or 16M pages in the VRMA */
3035 if (!(psize
== 0x1000 || psize
== 0x10000 ||
3036 psize
== 0x1000000))
3039 /* Update VRMASD field in the LPCR */
3040 senc
= slb_pgsize_encoding(psize
);
3041 kvm
->arch
.vrma_slb_v
= senc
| SLB_VSID_B_1T
|
3042 (VRMA_VSID
<< SLB_VSID_SHIFT_1T
);
3043 /* the -4 is to account for senc values starting at 0x10 */
3044 lpcr
= senc
<< (LPCR_VRMASD_SH
- 4);
3046 /* Create HPTEs in the hash page table for the VRMA */
3047 kvmppc_map_vrma(vcpu
, memslot
, porder
);
3049 kvmppc_update_lpcr(kvm
, lpcr
, LPCR_VRMASD
);
3051 /* Order updates to kvm->arch.lpcr etc. vs. hpte_setup_done */
3053 kvm
->arch
.hpte_setup_done
= 1;
3056 srcu_read_unlock(&kvm
->srcu
, srcu_idx
);
3058 mutex_unlock(&kvm
->lock
);
3062 up_read(¤t
->mm
->mmap_sem
);
3066 #ifdef CONFIG_KVM_XICS
3067 static int kvmppc_cpu_notify(struct notifier_block
*self
, unsigned long action
,
3070 unsigned long cpu
= (long)hcpu
;
3073 case CPU_UP_PREPARE
:
3074 case CPU_UP_PREPARE_FROZEN
:
3075 kvmppc_set_host_core(cpu
);
3078 #ifdef CONFIG_HOTPLUG_CPU
3080 case CPU_DEAD_FROZEN
:
3081 case CPU_UP_CANCELED
:
3082 case CPU_UP_CANCELED_FROZEN
:
3083 kvmppc_clear_host_core(cpu
);
3093 static struct notifier_block kvmppc_cpu_notifier
= {
3094 .notifier_call
= kvmppc_cpu_notify
,
3098 * Allocate a per-core structure for managing state about which cores are
3099 * running in the host versus the guest and for exchanging data between
3100 * real mode KVM and CPU running in the host.
3101 * This is only done for the first VM.
3102 * The allocated structure stays even if all VMs have stopped.
3103 * It is only freed when the kvm-hv module is unloaded.
3104 * It's OK for this routine to fail, we just don't support host
3105 * core operations like redirecting H_IPI wakeups.
3107 void kvmppc_alloc_host_rm_ops(void)
3109 struct kvmppc_host_rm_ops
*ops
;
3110 unsigned long l_ops
;
3114 /* Not the first time here ? */
3115 if (kvmppc_host_rm_ops_hv
!= NULL
)
3118 ops
= kzalloc(sizeof(struct kvmppc_host_rm_ops
), GFP_KERNEL
);
3122 size
= cpu_nr_cores() * sizeof(struct kvmppc_host_rm_core
);
3123 ops
->rm_core
= kzalloc(size
, GFP_KERNEL
);
3125 if (!ops
->rm_core
) {
3132 for (cpu
= 0; cpu
< nr_cpu_ids
; cpu
+= threads_per_core
) {
3133 if (!cpu_online(cpu
))
3136 core
= cpu
>> threads_shift
;
3137 ops
->rm_core
[core
].rm_state
.in_host
= 1;
3140 ops
->vcpu_kick
= kvmppc_fast_vcpu_kick_hv
;
3143 * Make the contents of the kvmppc_host_rm_ops structure visible
3144 * to other CPUs before we assign it to the global variable.
3145 * Do an atomic assignment (no locks used here), but if someone
3146 * beats us to it, just free our copy and return.
3149 l_ops
= (unsigned long) ops
;
3151 if (cmpxchg64((unsigned long *)&kvmppc_host_rm_ops_hv
, 0, l_ops
)) {
3153 kfree(ops
->rm_core
);
3158 register_cpu_notifier(&kvmppc_cpu_notifier
);
3163 void kvmppc_free_host_rm_ops(void)
3165 if (kvmppc_host_rm_ops_hv
) {
3166 unregister_cpu_notifier(&kvmppc_cpu_notifier
);
3167 kfree(kvmppc_host_rm_ops_hv
->rm_core
);
3168 kfree(kvmppc_host_rm_ops_hv
);
3169 kvmppc_host_rm_ops_hv
= NULL
;
3174 static int kvmppc_core_init_vm_hv(struct kvm
*kvm
)
3176 unsigned long lpcr
, lpid
;
3179 /* Allocate the guest's logical partition ID */
3181 lpid
= kvmppc_alloc_lpid();
3184 kvm
->arch
.lpid
= lpid
;
3186 kvmppc_alloc_host_rm_ops();
3189 * Since we don't flush the TLB when tearing down a VM,
3190 * and this lpid might have previously been used,
3191 * make sure we flush on each core before running the new VM.
3193 cpumask_setall(&kvm
->arch
.need_tlb_flush
);
3195 /* Start out with the default set of hcalls enabled */
3196 memcpy(kvm
->arch
.enabled_hcalls
, default_enabled_hcalls
,
3197 sizeof(kvm
->arch
.enabled_hcalls
));
3199 kvm
->arch
.host_sdr1
= mfspr(SPRN_SDR1
);
3201 /* Init LPCR for virtual RMA mode */
3202 kvm
->arch
.host_lpid
= mfspr(SPRN_LPID
);
3203 kvm
->arch
.host_lpcr
= lpcr
= mfspr(SPRN_LPCR
);
3204 lpcr
&= LPCR_PECE
| LPCR_LPES
;
3205 lpcr
|= (4UL << LPCR_DPFD_SH
) | LPCR_HDICE
|
3206 LPCR_VPM0
| LPCR_VPM1
;
3207 kvm
->arch
.vrma_slb_v
= SLB_VSID_B_1T
|
3208 (VRMA_VSID
<< SLB_VSID_SHIFT_1T
);
3209 /* On POWER8 turn on online bit to enable PURR/SPURR */
3210 if (cpu_has_feature(CPU_FTR_ARCH_207S
))
3212 kvm
->arch
.lpcr
= lpcr
;
3215 * Track that we now have a HV mode VM active. This blocks secondary
3216 * CPU threads from coming online.
3218 kvm_hv_vm_activated();
3221 * Create a debugfs directory for the VM
3223 snprintf(buf
, sizeof(buf
), "vm%d", current
->pid
);
3224 kvm
->arch
.debugfs_dir
= debugfs_create_dir(buf
, kvm_debugfs_dir
);
3225 if (!IS_ERR_OR_NULL(kvm
->arch
.debugfs_dir
))
3226 kvmppc_mmu_debugfs_init(kvm
);
3231 static void kvmppc_free_vcores(struct kvm
*kvm
)
3235 for (i
= 0; i
< KVM_MAX_VCORES
; ++i
)
3236 kfree(kvm
->arch
.vcores
[i
]);
3237 kvm
->arch
.online_vcores
= 0;
3240 static void kvmppc_core_destroy_vm_hv(struct kvm
*kvm
)
3242 debugfs_remove_recursive(kvm
->arch
.debugfs_dir
);
3244 kvm_hv_vm_deactivated();
3246 kvmppc_free_vcores(kvm
);
3248 kvmppc_free_hpt(kvm
);
3251 /* We don't need to emulate any privileged instructions or dcbz */
3252 static int kvmppc_core_emulate_op_hv(struct kvm_run
*run
, struct kvm_vcpu
*vcpu
,
3253 unsigned int inst
, int *advance
)
3255 return EMULATE_FAIL
;
3258 static int kvmppc_core_emulate_mtspr_hv(struct kvm_vcpu
*vcpu
, int sprn
,
3261 return EMULATE_FAIL
;
3264 static int kvmppc_core_emulate_mfspr_hv(struct kvm_vcpu
*vcpu
, int sprn
,
3267 return EMULATE_FAIL
;
3270 static int kvmppc_core_check_processor_compat_hv(void)
3272 if (!cpu_has_feature(CPU_FTR_HVMODE
) ||
3273 !cpu_has_feature(CPU_FTR_ARCH_206
))
3276 * Disable KVM for Power9, untill the required bits merged.
3278 if (cpu_has_feature(CPU_FTR_ARCH_300
))
3284 static long kvm_arch_vm_ioctl_hv(struct file
*filp
,
3285 unsigned int ioctl
, unsigned long arg
)
3287 struct kvm
*kvm __maybe_unused
= filp
->private_data
;
3288 void __user
*argp
= (void __user
*)arg
;
3293 case KVM_PPC_ALLOCATE_HTAB
: {
3297 if (get_user(htab_order
, (u32 __user
*)argp
))
3299 r
= kvmppc_alloc_reset_hpt(kvm
, &htab_order
);
3303 if (put_user(htab_order
, (u32 __user
*)argp
))
3309 case KVM_PPC_GET_HTAB_FD
: {
3310 struct kvm_get_htab_fd ghf
;
3313 if (copy_from_user(&ghf
, argp
, sizeof(ghf
)))
3315 r
= kvm_vm_ioctl_get_htab_fd(kvm
, &ghf
);
3327 * List of hcall numbers to enable by default.
3328 * For compatibility with old userspace, we enable by default
3329 * all hcalls that were implemented before the hcall-enabling
3330 * facility was added. Note this list should not include H_RTAS.
3332 static unsigned int default_hcall_list
[] = {
3346 #ifdef CONFIG_KVM_XICS
3357 static void init_default_hcalls(void)
3362 for (i
= 0; default_hcall_list
[i
]; ++i
) {
3363 hcall
= default_hcall_list
[i
];
3364 WARN_ON(!kvmppc_hcall_impl_hv(hcall
));
3365 __set_bit(hcall
/ 4, default_enabled_hcalls
);
3369 static struct kvmppc_ops kvm_ops_hv
= {
3370 .get_sregs
= kvm_arch_vcpu_ioctl_get_sregs_hv
,
3371 .set_sregs
= kvm_arch_vcpu_ioctl_set_sregs_hv
,
3372 .get_one_reg
= kvmppc_get_one_reg_hv
,
3373 .set_one_reg
= kvmppc_set_one_reg_hv
,
3374 .vcpu_load
= kvmppc_core_vcpu_load_hv
,
3375 .vcpu_put
= kvmppc_core_vcpu_put_hv
,
3376 .set_msr
= kvmppc_set_msr_hv
,
3377 .vcpu_run
= kvmppc_vcpu_run_hv
,
3378 .vcpu_create
= kvmppc_core_vcpu_create_hv
,
3379 .vcpu_free
= kvmppc_core_vcpu_free_hv
,
3380 .check_requests
= kvmppc_core_check_requests_hv
,
3381 .get_dirty_log
= kvm_vm_ioctl_get_dirty_log_hv
,
3382 .flush_memslot
= kvmppc_core_flush_memslot_hv
,
3383 .prepare_memory_region
= kvmppc_core_prepare_memory_region_hv
,
3384 .commit_memory_region
= kvmppc_core_commit_memory_region_hv
,
3385 .unmap_hva
= kvm_unmap_hva_hv
,
3386 .unmap_hva_range
= kvm_unmap_hva_range_hv
,
3387 .age_hva
= kvm_age_hva_hv
,
3388 .test_age_hva
= kvm_test_age_hva_hv
,
3389 .set_spte_hva
= kvm_set_spte_hva_hv
,
3390 .mmu_destroy
= kvmppc_mmu_destroy_hv
,
3391 .free_memslot
= kvmppc_core_free_memslot_hv
,
3392 .create_memslot
= kvmppc_core_create_memslot_hv
,
3393 .init_vm
= kvmppc_core_init_vm_hv
,
3394 .destroy_vm
= kvmppc_core_destroy_vm_hv
,
3395 .get_smmu_info
= kvm_vm_ioctl_get_smmu_info_hv
,
3396 .emulate_op
= kvmppc_core_emulate_op_hv
,
3397 .emulate_mtspr
= kvmppc_core_emulate_mtspr_hv
,
3398 .emulate_mfspr
= kvmppc_core_emulate_mfspr_hv
,
3399 .fast_vcpu_kick
= kvmppc_fast_vcpu_kick_hv
,
3400 .arch_vm_ioctl
= kvm_arch_vm_ioctl_hv
,
3401 .hcall_implemented
= kvmppc_hcall_impl_hv
,
3404 static int kvmppc_book3s_init_hv(void)
3408 * FIXME!! Do we need to check on all cpus ?
3410 r
= kvmppc_core_check_processor_compat_hv();
3414 kvm_ops_hv
.owner
= THIS_MODULE
;
3415 kvmppc_hv_ops
= &kvm_ops_hv
;
3417 init_default_hcalls();
3421 r
= kvmppc_mmu_hv_init();
3425 static void kvmppc_book3s_exit_hv(void)
3427 kvmppc_free_host_rm_ops();
3428 kvmppc_hv_ops
= NULL
;
3431 module_init(kvmppc_book3s_init_hv
);
3432 module_exit(kvmppc_book3s_exit_hv
);
3433 MODULE_LICENSE("GPL");
3434 MODULE_ALIAS_MISCDEV(KVM_MINOR
);
3435 MODULE_ALIAS("devname:kvm");