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/cpumask.h>
31 #include <linux/spinlock.h>
32 #include <linux/page-flags.h>
33 #include <linux/srcu.h>
34 #include <linux/miscdevice.h>
37 #include <asm/cputable.h>
38 #include <asm/cache.h>
39 #include <asm/cacheflush.h>
40 #include <asm/tlbflush.h>
41 #include <asm/uaccess.h>
43 #include <asm/kvm_ppc.h>
44 #include <asm/kvm_book3s.h>
45 #include <asm/mmu_context.h>
46 #include <asm/lppaca.h>
47 #include <asm/processor.h>
48 #include <asm/cputhreads.h>
50 #include <asm/hvcall.h>
51 #include <asm/switch_to.h>
53 #include <linux/gfp.h>
54 #include <linux/vmalloc.h>
55 #include <linux/highmem.h>
56 #include <linux/hugetlb.h>
57 #include <linux/module.h>
61 #define CREATE_TRACE_POINTS
64 /* #define EXIT_DEBUG */
65 /* #define EXIT_DEBUG_SIMPLE */
66 /* #define EXIT_DEBUG_INT */
68 /* Used to indicate that a guest page fault needs to be handled */
69 #define RESUME_PAGE_FAULT (RESUME_GUEST | RESUME_FLAG_ARCH1)
71 /* Used as a "null" value for timebase values */
72 #define TB_NIL (~(u64)0)
74 static DECLARE_BITMAP(default_enabled_hcalls
, MAX_HCALL_OPCODE
/4 + 1);
76 #if defined(CONFIG_PPC_64K_PAGES)
77 #define MPP_BUFFER_ORDER 0
78 #elif defined(CONFIG_PPC_4K_PAGES)
79 #define MPP_BUFFER_ORDER 3
83 static void kvmppc_end_cede(struct kvm_vcpu
*vcpu
);
84 static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu
*vcpu
);
86 static void kvmppc_fast_vcpu_kick_hv(struct kvm_vcpu
*vcpu
)
90 wait_queue_head_t
*wqp
;
92 wqp
= kvm_arch_vcpu_wq(vcpu
);
93 if (waitqueue_active(wqp
)) {
94 wake_up_interruptible(wqp
);
95 ++vcpu
->stat
.halt_wakeup
;
100 /* CPU points to the first thread of the core */
101 if (cpu
!= me
&& cpu
>= 0 && cpu
< nr_cpu_ids
) {
102 #ifdef CONFIG_PPC_ICP_NATIVE
103 int real_cpu
= cpu
+ vcpu
->arch
.ptid
;
104 if (paca
[real_cpu
].kvm_hstate
.xics_phys
)
105 xics_wake_cpu(real_cpu
);
109 smp_send_reschedule(cpu
);
115 * We use the vcpu_load/put functions to measure stolen time.
116 * Stolen time is counted as time when either the vcpu is able to
117 * run as part of a virtual core, but the task running the vcore
118 * is preempted or sleeping, or when the vcpu needs something done
119 * in the kernel by the task running the vcpu, but that task is
120 * preempted or sleeping. Those two things have to be counted
121 * separately, since one of the vcpu tasks will take on the job
122 * of running the core, and the other vcpu tasks in the vcore will
123 * sleep waiting for it to do that, but that sleep shouldn't count
126 * Hence we accumulate stolen time when the vcpu can run as part of
127 * a vcore using vc->stolen_tb, and the stolen time when the vcpu
128 * needs its task to do other things in the kernel (for example,
129 * service a page fault) in busy_stolen. We don't accumulate
130 * stolen time for a vcore when it is inactive, or for a vcpu
131 * when it is in state RUNNING or NOTREADY. NOTREADY is a bit of
132 * a misnomer; it means that the vcpu task is not executing in
133 * the KVM_VCPU_RUN ioctl, i.e. it is in userspace or elsewhere in
134 * the kernel. We don't have any way of dividing up that time
135 * between time that the vcpu is genuinely stopped, time that
136 * the task is actively working on behalf of the vcpu, and time
137 * that the task is preempted, so we don't count any of it as
140 * Updates to busy_stolen are protected by arch.tbacct_lock;
141 * updates to vc->stolen_tb are protected by the vcore->stoltb_lock
142 * lock. The stolen times are measured in units of timebase ticks.
143 * (Note that the != TB_NIL checks below are purely defensive;
144 * they should never fail.)
147 static void kvmppc_core_vcpu_load_hv(struct kvm_vcpu
*vcpu
, int cpu
)
149 struct kvmppc_vcore
*vc
= vcpu
->arch
.vcore
;
153 * We can test vc->runner without taking the vcore lock,
154 * because only this task ever sets vc->runner to this
155 * vcpu, and once it is set to this vcpu, only this task
156 * ever sets it to NULL.
158 if (vc
->runner
== vcpu
&& vc
->vcore_state
!= VCORE_INACTIVE
) {
159 spin_lock_irqsave(&vc
->stoltb_lock
, flags
);
160 if (vc
->preempt_tb
!= TB_NIL
) {
161 vc
->stolen_tb
+= mftb() - vc
->preempt_tb
;
162 vc
->preempt_tb
= TB_NIL
;
164 spin_unlock_irqrestore(&vc
->stoltb_lock
, flags
);
166 spin_lock_irqsave(&vcpu
->arch
.tbacct_lock
, flags
);
167 if (vcpu
->arch
.state
== KVMPPC_VCPU_BUSY_IN_HOST
&&
168 vcpu
->arch
.busy_preempt
!= TB_NIL
) {
169 vcpu
->arch
.busy_stolen
+= mftb() - vcpu
->arch
.busy_preempt
;
170 vcpu
->arch
.busy_preempt
= TB_NIL
;
172 spin_unlock_irqrestore(&vcpu
->arch
.tbacct_lock
, flags
);
175 static void kvmppc_core_vcpu_put_hv(struct kvm_vcpu
*vcpu
)
177 struct kvmppc_vcore
*vc
= vcpu
->arch
.vcore
;
180 if (vc
->runner
== vcpu
&& vc
->vcore_state
!= VCORE_INACTIVE
) {
181 spin_lock_irqsave(&vc
->stoltb_lock
, flags
);
182 vc
->preempt_tb
= mftb();
183 spin_unlock_irqrestore(&vc
->stoltb_lock
, flags
);
185 spin_lock_irqsave(&vcpu
->arch
.tbacct_lock
, flags
);
186 if (vcpu
->arch
.state
== KVMPPC_VCPU_BUSY_IN_HOST
)
187 vcpu
->arch
.busy_preempt
= mftb();
188 spin_unlock_irqrestore(&vcpu
->arch
.tbacct_lock
, flags
);
191 static void kvmppc_set_msr_hv(struct kvm_vcpu
*vcpu
, u64 msr
)
193 vcpu
->arch
.shregs
.msr
= msr
;
194 kvmppc_end_cede(vcpu
);
197 void kvmppc_set_pvr_hv(struct kvm_vcpu
*vcpu
, u32 pvr
)
199 vcpu
->arch
.pvr
= pvr
;
202 int kvmppc_set_arch_compat(struct kvm_vcpu
*vcpu
, u32 arch_compat
)
204 unsigned long pcr
= 0;
205 struct kvmppc_vcore
*vc
= vcpu
->arch
.vcore
;
208 switch (arch_compat
) {
211 * If an arch bit is set in PCR, all the defined
212 * higher-order arch bits also have to be set.
214 pcr
= PCR_ARCH_206
| PCR_ARCH_205
;
226 if (!cpu_has_feature(CPU_FTR_ARCH_207S
)) {
227 /* POWER7 can't emulate POWER8 */
228 if (!(pcr
& PCR_ARCH_206
))
230 pcr
&= ~PCR_ARCH_206
;
234 spin_lock(&vc
->lock
);
235 vc
->arch_compat
= arch_compat
;
237 spin_unlock(&vc
->lock
);
242 void kvmppc_dump_regs(struct kvm_vcpu
*vcpu
)
246 pr_err("vcpu %p (%d):\n", vcpu
, vcpu
->vcpu_id
);
247 pr_err("pc = %.16lx msr = %.16llx trap = %x\n",
248 vcpu
->arch
.pc
, vcpu
->arch
.shregs
.msr
, vcpu
->arch
.trap
);
249 for (r
= 0; r
< 16; ++r
)
250 pr_err("r%2d = %.16lx r%d = %.16lx\n",
251 r
, kvmppc_get_gpr(vcpu
, r
),
252 r
+16, kvmppc_get_gpr(vcpu
, r
+16));
253 pr_err("ctr = %.16lx lr = %.16lx\n",
254 vcpu
->arch
.ctr
, vcpu
->arch
.lr
);
255 pr_err("srr0 = %.16llx srr1 = %.16llx\n",
256 vcpu
->arch
.shregs
.srr0
, vcpu
->arch
.shregs
.srr1
);
257 pr_err("sprg0 = %.16llx sprg1 = %.16llx\n",
258 vcpu
->arch
.shregs
.sprg0
, vcpu
->arch
.shregs
.sprg1
);
259 pr_err("sprg2 = %.16llx sprg3 = %.16llx\n",
260 vcpu
->arch
.shregs
.sprg2
, vcpu
->arch
.shregs
.sprg3
);
261 pr_err("cr = %.8x xer = %.16lx dsisr = %.8x\n",
262 vcpu
->arch
.cr
, vcpu
->arch
.xer
, vcpu
->arch
.shregs
.dsisr
);
263 pr_err("dar = %.16llx\n", vcpu
->arch
.shregs
.dar
);
264 pr_err("fault dar = %.16lx dsisr = %.8x\n",
265 vcpu
->arch
.fault_dar
, vcpu
->arch
.fault_dsisr
);
266 pr_err("SLB (%d entries):\n", vcpu
->arch
.slb_max
);
267 for (r
= 0; r
< vcpu
->arch
.slb_max
; ++r
)
268 pr_err(" ESID = %.16llx VSID = %.16llx\n",
269 vcpu
->arch
.slb
[r
].orige
, vcpu
->arch
.slb
[r
].origv
);
270 pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n",
271 vcpu
->arch
.vcore
->lpcr
, vcpu
->kvm
->arch
.sdr1
,
272 vcpu
->arch
.last_inst
);
275 struct kvm_vcpu
*kvmppc_find_vcpu(struct kvm
*kvm
, int id
)
278 struct kvm_vcpu
*v
, *ret
= NULL
;
280 mutex_lock(&kvm
->lock
);
281 kvm_for_each_vcpu(r
, v
, kvm
) {
282 if (v
->vcpu_id
== id
) {
287 mutex_unlock(&kvm
->lock
);
291 static void init_vpa(struct kvm_vcpu
*vcpu
, struct lppaca
*vpa
)
293 vpa
->__old_status
|= LPPACA_OLD_SHARED_PROC
;
294 vpa
->yield_count
= cpu_to_be32(1);
297 static int set_vpa(struct kvm_vcpu
*vcpu
, struct kvmppc_vpa
*v
,
298 unsigned long addr
, unsigned long len
)
300 /* check address is cacheline aligned */
301 if (addr
& (L1_CACHE_BYTES
- 1))
303 spin_lock(&vcpu
->arch
.vpa_update_lock
);
304 if (v
->next_gpa
!= addr
|| v
->len
!= len
) {
306 v
->len
= addr
? len
: 0;
307 v
->update_pending
= 1;
309 spin_unlock(&vcpu
->arch
.vpa_update_lock
);
313 /* Length for a per-processor buffer is passed in at offset 4 in the buffer */
322 static int vpa_is_registered(struct kvmppc_vpa
*vpap
)
324 if (vpap
->update_pending
)
325 return vpap
->next_gpa
!= 0;
326 return vpap
->pinned_addr
!= NULL
;
329 static unsigned long do_h_register_vpa(struct kvm_vcpu
*vcpu
,
331 unsigned long vcpuid
, unsigned long vpa
)
333 struct kvm
*kvm
= vcpu
->kvm
;
334 unsigned long len
, nb
;
336 struct kvm_vcpu
*tvcpu
;
339 struct kvmppc_vpa
*vpap
;
341 tvcpu
= kvmppc_find_vcpu(kvm
, vcpuid
);
345 subfunc
= (flags
>> H_VPA_FUNC_SHIFT
) & H_VPA_FUNC_MASK
;
346 if (subfunc
== H_VPA_REG_VPA
|| subfunc
== H_VPA_REG_DTL
||
347 subfunc
== H_VPA_REG_SLB
) {
348 /* Registering new area - address must be cache-line aligned */
349 if ((vpa
& (L1_CACHE_BYTES
- 1)) || !vpa
)
352 /* convert logical addr to kernel addr and read length */
353 va
= kvmppc_pin_guest_page(kvm
, vpa
, &nb
);
356 if (subfunc
== H_VPA_REG_VPA
)
357 len
= be16_to_cpu(((struct reg_vpa
*)va
)->length
.hword
);
359 len
= be32_to_cpu(((struct reg_vpa
*)va
)->length
.word
);
360 kvmppc_unpin_guest_page(kvm
, va
, vpa
, false);
363 if (len
> nb
|| len
< sizeof(struct reg_vpa
))
372 spin_lock(&tvcpu
->arch
.vpa_update_lock
);
375 case H_VPA_REG_VPA
: /* register VPA */
376 if (len
< sizeof(struct lppaca
))
378 vpap
= &tvcpu
->arch
.vpa
;
382 case H_VPA_REG_DTL
: /* register DTL */
383 if (len
< sizeof(struct dtl_entry
))
385 len
-= len
% sizeof(struct dtl_entry
);
387 /* Check that they have previously registered a VPA */
389 if (!vpa_is_registered(&tvcpu
->arch
.vpa
))
392 vpap
= &tvcpu
->arch
.dtl
;
396 case H_VPA_REG_SLB
: /* register SLB shadow buffer */
397 /* Check that they have previously registered a VPA */
399 if (!vpa_is_registered(&tvcpu
->arch
.vpa
))
402 vpap
= &tvcpu
->arch
.slb_shadow
;
406 case H_VPA_DEREG_VPA
: /* deregister VPA */
407 /* Check they don't still have a DTL or SLB buf registered */
409 if (vpa_is_registered(&tvcpu
->arch
.dtl
) ||
410 vpa_is_registered(&tvcpu
->arch
.slb_shadow
))
413 vpap
= &tvcpu
->arch
.vpa
;
417 case H_VPA_DEREG_DTL
: /* deregister DTL */
418 vpap
= &tvcpu
->arch
.dtl
;
422 case H_VPA_DEREG_SLB
: /* deregister SLB shadow buffer */
423 vpap
= &tvcpu
->arch
.slb_shadow
;
429 vpap
->next_gpa
= vpa
;
431 vpap
->update_pending
= 1;
434 spin_unlock(&tvcpu
->arch
.vpa_update_lock
);
439 static void kvmppc_update_vpa(struct kvm_vcpu
*vcpu
, struct kvmppc_vpa
*vpap
)
441 struct kvm
*kvm
= vcpu
->kvm
;
447 * We need to pin the page pointed to by vpap->next_gpa,
448 * but we can't call kvmppc_pin_guest_page under the lock
449 * as it does get_user_pages() and down_read(). So we
450 * have to drop the lock, pin the page, then get the lock
451 * again and check that a new area didn't get registered
455 gpa
= vpap
->next_gpa
;
456 spin_unlock(&vcpu
->arch
.vpa_update_lock
);
460 va
= kvmppc_pin_guest_page(kvm
, gpa
, &nb
);
461 spin_lock(&vcpu
->arch
.vpa_update_lock
);
462 if (gpa
== vpap
->next_gpa
)
464 /* sigh... unpin that one and try again */
466 kvmppc_unpin_guest_page(kvm
, va
, gpa
, false);
469 vpap
->update_pending
= 0;
470 if (va
&& nb
< vpap
->len
) {
472 * If it's now too short, it must be that userspace
473 * has changed the mappings underlying guest memory,
474 * so unregister the region.
476 kvmppc_unpin_guest_page(kvm
, va
, gpa
, false);
479 if (vpap
->pinned_addr
)
480 kvmppc_unpin_guest_page(kvm
, vpap
->pinned_addr
, vpap
->gpa
,
483 vpap
->pinned_addr
= va
;
486 vpap
->pinned_end
= va
+ vpap
->len
;
489 static void kvmppc_update_vpas(struct kvm_vcpu
*vcpu
)
491 if (!(vcpu
->arch
.vpa
.update_pending
||
492 vcpu
->arch
.slb_shadow
.update_pending
||
493 vcpu
->arch
.dtl
.update_pending
))
496 spin_lock(&vcpu
->arch
.vpa_update_lock
);
497 if (vcpu
->arch
.vpa
.update_pending
) {
498 kvmppc_update_vpa(vcpu
, &vcpu
->arch
.vpa
);
499 if (vcpu
->arch
.vpa
.pinned_addr
)
500 init_vpa(vcpu
, vcpu
->arch
.vpa
.pinned_addr
);
502 if (vcpu
->arch
.dtl
.update_pending
) {
503 kvmppc_update_vpa(vcpu
, &vcpu
->arch
.dtl
);
504 vcpu
->arch
.dtl_ptr
= vcpu
->arch
.dtl
.pinned_addr
;
505 vcpu
->arch
.dtl_index
= 0;
507 if (vcpu
->arch
.slb_shadow
.update_pending
)
508 kvmppc_update_vpa(vcpu
, &vcpu
->arch
.slb_shadow
);
509 spin_unlock(&vcpu
->arch
.vpa_update_lock
);
513 * Return the accumulated stolen time for the vcore up until `now'.
514 * The caller should hold the vcore lock.
516 static u64
vcore_stolen_time(struct kvmppc_vcore
*vc
, u64 now
)
521 spin_lock_irqsave(&vc
->stoltb_lock
, flags
);
523 if (vc
->vcore_state
!= VCORE_INACTIVE
&&
524 vc
->preempt_tb
!= TB_NIL
)
525 p
+= now
- vc
->preempt_tb
;
526 spin_unlock_irqrestore(&vc
->stoltb_lock
, flags
);
530 static void kvmppc_create_dtl_entry(struct kvm_vcpu
*vcpu
,
531 struct kvmppc_vcore
*vc
)
533 struct dtl_entry
*dt
;
535 unsigned long stolen
;
536 unsigned long core_stolen
;
539 dt
= vcpu
->arch
.dtl_ptr
;
540 vpa
= vcpu
->arch
.vpa
.pinned_addr
;
542 core_stolen
= vcore_stolen_time(vc
, now
);
543 stolen
= core_stolen
- vcpu
->arch
.stolen_logged
;
544 vcpu
->arch
.stolen_logged
= core_stolen
;
545 spin_lock_irq(&vcpu
->arch
.tbacct_lock
);
546 stolen
+= vcpu
->arch
.busy_stolen
;
547 vcpu
->arch
.busy_stolen
= 0;
548 spin_unlock_irq(&vcpu
->arch
.tbacct_lock
);
551 memset(dt
, 0, sizeof(struct dtl_entry
));
552 dt
->dispatch_reason
= 7;
553 dt
->processor_id
= cpu_to_be16(vc
->pcpu
+ vcpu
->arch
.ptid
);
554 dt
->timebase
= cpu_to_be64(now
+ vc
->tb_offset
);
555 dt
->enqueue_to_dispatch_time
= cpu_to_be32(stolen
);
556 dt
->srr0
= cpu_to_be64(kvmppc_get_pc(vcpu
));
557 dt
->srr1
= cpu_to_be64(vcpu
->arch
.shregs
.msr
);
559 if (dt
== vcpu
->arch
.dtl
.pinned_end
)
560 dt
= vcpu
->arch
.dtl
.pinned_addr
;
561 vcpu
->arch
.dtl_ptr
= dt
;
562 /* order writing *dt vs. writing vpa->dtl_idx */
564 vpa
->dtl_idx
= cpu_to_be64(++vcpu
->arch
.dtl_index
);
565 vcpu
->arch
.dtl
.dirty
= true;
568 static bool kvmppc_power8_compatible(struct kvm_vcpu
*vcpu
)
570 if (vcpu
->arch
.vcore
->arch_compat
>= PVR_ARCH_207
)
572 if ((!vcpu
->arch
.vcore
->arch_compat
) &&
573 cpu_has_feature(CPU_FTR_ARCH_207S
))
578 static int kvmppc_h_set_mode(struct kvm_vcpu
*vcpu
, unsigned long mflags
,
579 unsigned long resource
, unsigned long value1
,
580 unsigned long value2
)
583 case H_SET_MODE_RESOURCE_SET_CIABR
:
584 if (!kvmppc_power8_compatible(vcpu
))
589 return H_UNSUPPORTED_FLAG_START
;
590 /* Guests can't breakpoint the hypervisor */
591 if ((value1
& CIABR_PRIV
) == CIABR_PRIV_HYPER
)
593 vcpu
->arch
.ciabr
= value1
;
595 case H_SET_MODE_RESOURCE_SET_DAWR
:
596 if (!kvmppc_power8_compatible(vcpu
))
599 return H_UNSUPPORTED_FLAG_START
;
600 if (value2
& DABRX_HYP
)
602 vcpu
->arch
.dawr
= value1
;
603 vcpu
->arch
.dawrx
= value2
;
610 static int kvm_arch_vcpu_yield_to(struct kvm_vcpu
*target
)
612 struct kvmppc_vcore
*vcore
= target
->arch
.vcore
;
615 * We expect to have been called by the real mode handler
616 * (kvmppc_rm_h_confer()) which would have directly returned
617 * H_SUCCESS if the source vcore wasn't idle (e.g. if it may
618 * have useful work to do and should not confer) so we don't
622 spin_lock(&vcore
->lock
);
623 if (target
->arch
.state
== KVMPPC_VCPU_RUNNABLE
&&
624 vcore
->vcore_state
!= VCORE_INACTIVE
)
625 target
= vcore
->runner
;
626 spin_unlock(&vcore
->lock
);
628 return kvm_vcpu_yield_to(target
);
631 static int kvmppc_get_yield_count(struct kvm_vcpu
*vcpu
)
634 struct lppaca
*lppaca
;
636 spin_lock(&vcpu
->arch
.vpa_update_lock
);
637 lppaca
= (struct lppaca
*)vcpu
->arch
.vpa
.pinned_addr
;
639 yield_count
= lppaca
->yield_count
;
640 spin_unlock(&vcpu
->arch
.vpa_update_lock
);
644 int kvmppc_pseries_do_hcall(struct kvm_vcpu
*vcpu
)
646 unsigned long req
= kvmppc_get_gpr(vcpu
, 3);
647 unsigned long target
, ret
= H_SUCCESS
;
649 struct kvm_vcpu
*tvcpu
;
652 if (req
<= MAX_HCALL_OPCODE
&&
653 !test_bit(req
/4, vcpu
->kvm
->arch
.enabled_hcalls
))
660 target
= kvmppc_get_gpr(vcpu
, 4);
661 tvcpu
= kvmppc_find_vcpu(vcpu
->kvm
, target
);
666 tvcpu
->arch
.prodded
= 1;
668 if (vcpu
->arch
.ceded
) {
669 if (waitqueue_active(&vcpu
->wq
)) {
670 wake_up_interruptible(&vcpu
->wq
);
671 vcpu
->stat
.halt_wakeup
++;
676 target
= kvmppc_get_gpr(vcpu
, 4);
679 tvcpu
= kvmppc_find_vcpu(vcpu
->kvm
, target
);
684 yield_count
= kvmppc_get_gpr(vcpu
, 5);
685 if (kvmppc_get_yield_count(tvcpu
) != yield_count
)
687 kvm_arch_vcpu_yield_to(tvcpu
);
690 ret
= do_h_register_vpa(vcpu
, kvmppc_get_gpr(vcpu
, 4),
691 kvmppc_get_gpr(vcpu
, 5),
692 kvmppc_get_gpr(vcpu
, 6));
695 if (list_empty(&vcpu
->kvm
->arch
.rtas_tokens
))
698 idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
699 rc
= kvmppc_rtas_hcall(vcpu
);
700 srcu_read_unlock(&vcpu
->kvm
->srcu
, idx
);
707 /* Send the error out to userspace via KVM_RUN */
710 ret
= kvmppc_h_set_mode(vcpu
, kvmppc_get_gpr(vcpu
, 4),
711 kvmppc_get_gpr(vcpu
, 5),
712 kvmppc_get_gpr(vcpu
, 6),
713 kvmppc_get_gpr(vcpu
, 7));
714 if (ret
== H_TOO_HARD
)
723 if (kvmppc_xics_enabled(vcpu
)) {
724 ret
= kvmppc_xics_hcall(vcpu
, req
);
730 kvmppc_set_gpr(vcpu
, 3, ret
);
731 vcpu
->arch
.hcall_needed
= 0;
735 static int kvmppc_hcall_impl_hv(unsigned long cmd
)
743 #ifdef CONFIG_KVM_XICS
754 /* See if it's in the real-mode table */
755 return kvmppc_hcall_impl_hv_realmode(cmd
);
758 static int kvmppc_emulate_debug_inst(struct kvm_run
*run
,
759 struct kvm_vcpu
*vcpu
)
763 if (kvmppc_get_last_inst(vcpu
, INST_GENERIC
, &last_inst
) !=
766 * Fetch failed, so return to guest and
767 * try executing it again.
772 if (last_inst
== KVMPPC_INST_SW_BREAKPOINT
) {
773 run
->exit_reason
= KVM_EXIT_DEBUG
;
774 run
->debug
.arch
.address
= kvmppc_get_pc(vcpu
);
777 kvmppc_core_queue_program(vcpu
, SRR1_PROGILL
);
782 static int kvmppc_handle_exit_hv(struct kvm_run
*run
, struct kvm_vcpu
*vcpu
,
783 struct task_struct
*tsk
)
787 vcpu
->stat
.sum_exits
++;
789 run
->exit_reason
= KVM_EXIT_UNKNOWN
;
790 run
->ready_for_interrupt_injection
= 1;
791 switch (vcpu
->arch
.trap
) {
792 /* We're good on these - the host merely wanted to get our attention */
793 case BOOK3S_INTERRUPT_HV_DECREMENTER
:
794 vcpu
->stat
.dec_exits
++;
797 case BOOK3S_INTERRUPT_EXTERNAL
:
798 case BOOK3S_INTERRUPT_H_DOORBELL
:
799 vcpu
->stat
.ext_intr_exits
++;
802 /* HMI is hypervisor interrupt and host has handled it. Resume guest.*/
803 case BOOK3S_INTERRUPT_HMI
:
804 case BOOK3S_INTERRUPT_PERFMON
:
807 case BOOK3S_INTERRUPT_MACHINE_CHECK
:
809 * Deliver a machine check interrupt to the guest.
810 * We have to do this, even if the host has handled the
811 * machine check, because machine checks use SRR0/1 and
812 * the interrupt might have trashed guest state in them.
814 kvmppc_book3s_queue_irqprio(vcpu
,
815 BOOK3S_INTERRUPT_MACHINE_CHECK
);
818 case BOOK3S_INTERRUPT_PROGRAM
:
822 * Normally program interrupts are delivered directly
823 * to the guest by the hardware, but we can get here
824 * as a result of a hypervisor emulation interrupt
825 * (e40) getting turned into a 700 by BML RTAS.
827 flags
= vcpu
->arch
.shregs
.msr
& 0x1f0000ull
;
828 kvmppc_core_queue_program(vcpu
, flags
);
832 case BOOK3S_INTERRUPT_SYSCALL
:
834 /* hcall - punt to userspace */
837 /* hypercall with MSR_PR has already been handled in rmode,
838 * and never reaches here.
841 run
->papr_hcall
.nr
= kvmppc_get_gpr(vcpu
, 3);
842 for (i
= 0; i
< 9; ++i
)
843 run
->papr_hcall
.args
[i
] = kvmppc_get_gpr(vcpu
, 4 + i
);
844 run
->exit_reason
= KVM_EXIT_PAPR_HCALL
;
845 vcpu
->arch
.hcall_needed
= 1;
850 * We get these next two if the guest accesses a page which it thinks
851 * it has mapped but which is not actually present, either because
852 * it is for an emulated I/O device or because the corresonding
853 * host page has been paged out. Any other HDSI/HISI interrupts
854 * have been handled already.
856 case BOOK3S_INTERRUPT_H_DATA_STORAGE
:
857 r
= RESUME_PAGE_FAULT
;
859 case BOOK3S_INTERRUPT_H_INST_STORAGE
:
860 vcpu
->arch
.fault_dar
= kvmppc_get_pc(vcpu
);
861 vcpu
->arch
.fault_dsisr
= 0;
862 r
= RESUME_PAGE_FAULT
;
865 * This occurs if the guest executes an illegal instruction.
866 * If the guest debug is disabled, generate a program interrupt
867 * to the guest. If guest debug is enabled, we need to check
868 * whether the instruction is a software breakpoint instruction.
869 * Accordingly return to Guest or Host.
871 case BOOK3S_INTERRUPT_H_EMUL_ASSIST
:
872 if (vcpu
->arch
.emul_inst
!= KVM_INST_FETCH_FAILED
)
873 vcpu
->arch
.last_inst
= kvmppc_need_byteswap(vcpu
) ?
874 swab32(vcpu
->arch
.emul_inst
) :
875 vcpu
->arch
.emul_inst
;
876 if (vcpu
->guest_debug
& KVM_GUESTDBG_USE_SW_BP
) {
877 r
= kvmppc_emulate_debug_inst(run
, vcpu
);
879 kvmppc_core_queue_program(vcpu
, SRR1_PROGILL
);
884 * This occurs if the guest (kernel or userspace), does something that
885 * is prohibited by HFSCR. We just generate a program interrupt to
888 case BOOK3S_INTERRUPT_H_FAC_UNAVAIL
:
889 kvmppc_core_queue_program(vcpu
, SRR1_PROGILL
);
893 kvmppc_dump_regs(vcpu
);
894 printk(KERN_EMERG
"trap=0x%x | pc=0x%lx | msr=0x%llx\n",
895 vcpu
->arch
.trap
, kvmppc_get_pc(vcpu
),
896 vcpu
->arch
.shregs
.msr
);
897 run
->hw
.hardware_exit_reason
= vcpu
->arch
.trap
;
905 static int kvm_arch_vcpu_ioctl_get_sregs_hv(struct kvm_vcpu
*vcpu
,
906 struct kvm_sregs
*sregs
)
910 memset(sregs
, 0, sizeof(struct kvm_sregs
));
911 sregs
->pvr
= vcpu
->arch
.pvr
;
912 for (i
= 0; i
< vcpu
->arch
.slb_max
; i
++) {
913 sregs
->u
.s
.ppc64
.slb
[i
].slbe
= vcpu
->arch
.slb
[i
].orige
;
914 sregs
->u
.s
.ppc64
.slb
[i
].slbv
= vcpu
->arch
.slb
[i
].origv
;
920 static int kvm_arch_vcpu_ioctl_set_sregs_hv(struct kvm_vcpu
*vcpu
,
921 struct kvm_sregs
*sregs
)
925 /* Only accept the same PVR as the host's, since we can't spoof it */
926 if (sregs
->pvr
!= vcpu
->arch
.pvr
)
930 for (i
= 0; i
< vcpu
->arch
.slb_nr
; i
++) {
931 if (sregs
->u
.s
.ppc64
.slb
[i
].slbe
& SLB_ESID_V
) {
932 vcpu
->arch
.slb
[j
].orige
= sregs
->u
.s
.ppc64
.slb
[i
].slbe
;
933 vcpu
->arch
.slb
[j
].origv
= sregs
->u
.s
.ppc64
.slb
[i
].slbv
;
937 vcpu
->arch
.slb_max
= j
;
942 static void kvmppc_set_lpcr(struct kvm_vcpu
*vcpu
, u64 new_lpcr
,
945 struct kvm
*kvm
= vcpu
->kvm
;
946 struct kvmppc_vcore
*vc
= vcpu
->arch
.vcore
;
949 mutex_lock(&kvm
->lock
);
950 spin_lock(&vc
->lock
);
952 * If ILE (interrupt little-endian) has changed, update the
953 * MSR_LE bit in the intr_msr for each vcpu in this vcore.
955 if ((new_lpcr
& LPCR_ILE
) != (vc
->lpcr
& LPCR_ILE
)) {
956 struct kvm_vcpu
*vcpu
;
959 kvm_for_each_vcpu(i
, vcpu
, kvm
) {
960 if (vcpu
->arch
.vcore
!= vc
)
962 if (new_lpcr
& LPCR_ILE
)
963 vcpu
->arch
.intr_msr
|= MSR_LE
;
965 vcpu
->arch
.intr_msr
&= ~MSR_LE
;
970 * Userspace can only modify DPFD (default prefetch depth),
971 * ILE (interrupt little-endian) and TC (translation control).
972 * On POWER8 userspace can also modify AIL (alt. interrupt loc.)
974 mask
= LPCR_DPFD
| LPCR_ILE
| LPCR_TC
;
975 if (cpu_has_feature(CPU_FTR_ARCH_207S
))
978 /* Broken 32-bit version of LPCR must not clear top bits */
981 vc
->lpcr
= (vc
->lpcr
& ~mask
) | (new_lpcr
& mask
);
982 spin_unlock(&vc
->lock
);
983 mutex_unlock(&kvm
->lock
);
986 static int kvmppc_get_one_reg_hv(struct kvm_vcpu
*vcpu
, u64 id
,
987 union kvmppc_one_reg
*val
)
993 case KVM_REG_PPC_DEBUG_INST
:
994 *val
= get_reg_val(id
, KVMPPC_INST_SW_BREAKPOINT
);
996 case KVM_REG_PPC_HIOR
:
997 *val
= get_reg_val(id
, 0);
999 case KVM_REG_PPC_DABR
:
1000 *val
= get_reg_val(id
, vcpu
->arch
.dabr
);
1002 case KVM_REG_PPC_DABRX
:
1003 *val
= get_reg_val(id
, vcpu
->arch
.dabrx
);
1005 case KVM_REG_PPC_DSCR
:
1006 *val
= get_reg_val(id
, vcpu
->arch
.dscr
);
1008 case KVM_REG_PPC_PURR
:
1009 *val
= get_reg_val(id
, vcpu
->arch
.purr
);
1011 case KVM_REG_PPC_SPURR
:
1012 *val
= get_reg_val(id
, vcpu
->arch
.spurr
);
1014 case KVM_REG_PPC_AMR
:
1015 *val
= get_reg_val(id
, vcpu
->arch
.amr
);
1017 case KVM_REG_PPC_UAMOR
:
1018 *val
= get_reg_val(id
, vcpu
->arch
.uamor
);
1020 case KVM_REG_PPC_MMCR0
... KVM_REG_PPC_MMCRS
:
1021 i
= id
- KVM_REG_PPC_MMCR0
;
1022 *val
= get_reg_val(id
, vcpu
->arch
.mmcr
[i
]);
1024 case KVM_REG_PPC_PMC1
... KVM_REG_PPC_PMC8
:
1025 i
= id
- KVM_REG_PPC_PMC1
;
1026 *val
= get_reg_val(id
, vcpu
->arch
.pmc
[i
]);
1028 case KVM_REG_PPC_SPMC1
... KVM_REG_PPC_SPMC2
:
1029 i
= id
- KVM_REG_PPC_SPMC1
;
1030 *val
= get_reg_val(id
, vcpu
->arch
.spmc
[i
]);
1032 case KVM_REG_PPC_SIAR
:
1033 *val
= get_reg_val(id
, vcpu
->arch
.siar
);
1035 case KVM_REG_PPC_SDAR
:
1036 *val
= get_reg_val(id
, vcpu
->arch
.sdar
);
1038 case KVM_REG_PPC_SIER
:
1039 *val
= get_reg_val(id
, vcpu
->arch
.sier
);
1041 case KVM_REG_PPC_IAMR
:
1042 *val
= get_reg_val(id
, vcpu
->arch
.iamr
);
1044 case KVM_REG_PPC_PSPB
:
1045 *val
= get_reg_val(id
, vcpu
->arch
.pspb
);
1047 case KVM_REG_PPC_DPDES
:
1048 *val
= get_reg_val(id
, vcpu
->arch
.vcore
->dpdes
);
1050 case KVM_REG_PPC_DAWR
:
1051 *val
= get_reg_val(id
, vcpu
->arch
.dawr
);
1053 case KVM_REG_PPC_DAWRX
:
1054 *val
= get_reg_val(id
, vcpu
->arch
.dawrx
);
1056 case KVM_REG_PPC_CIABR
:
1057 *val
= get_reg_val(id
, vcpu
->arch
.ciabr
);
1059 case KVM_REG_PPC_CSIGR
:
1060 *val
= get_reg_val(id
, vcpu
->arch
.csigr
);
1062 case KVM_REG_PPC_TACR
:
1063 *val
= get_reg_val(id
, vcpu
->arch
.tacr
);
1065 case KVM_REG_PPC_TCSCR
:
1066 *val
= get_reg_val(id
, vcpu
->arch
.tcscr
);
1068 case KVM_REG_PPC_PID
:
1069 *val
= get_reg_val(id
, vcpu
->arch
.pid
);
1071 case KVM_REG_PPC_ACOP
:
1072 *val
= get_reg_val(id
, vcpu
->arch
.acop
);
1074 case KVM_REG_PPC_WORT
:
1075 *val
= get_reg_val(id
, vcpu
->arch
.wort
);
1077 case KVM_REG_PPC_VPA_ADDR
:
1078 spin_lock(&vcpu
->arch
.vpa_update_lock
);
1079 *val
= get_reg_val(id
, vcpu
->arch
.vpa
.next_gpa
);
1080 spin_unlock(&vcpu
->arch
.vpa_update_lock
);
1082 case KVM_REG_PPC_VPA_SLB
:
1083 spin_lock(&vcpu
->arch
.vpa_update_lock
);
1084 val
->vpaval
.addr
= vcpu
->arch
.slb_shadow
.next_gpa
;
1085 val
->vpaval
.length
= vcpu
->arch
.slb_shadow
.len
;
1086 spin_unlock(&vcpu
->arch
.vpa_update_lock
);
1088 case KVM_REG_PPC_VPA_DTL
:
1089 spin_lock(&vcpu
->arch
.vpa_update_lock
);
1090 val
->vpaval
.addr
= vcpu
->arch
.dtl
.next_gpa
;
1091 val
->vpaval
.length
= vcpu
->arch
.dtl
.len
;
1092 spin_unlock(&vcpu
->arch
.vpa_update_lock
);
1094 case KVM_REG_PPC_TB_OFFSET
:
1095 *val
= get_reg_val(id
, vcpu
->arch
.vcore
->tb_offset
);
1097 case KVM_REG_PPC_LPCR
:
1098 case KVM_REG_PPC_LPCR_64
:
1099 *val
= get_reg_val(id
, vcpu
->arch
.vcore
->lpcr
);
1101 case KVM_REG_PPC_PPR
:
1102 *val
= get_reg_val(id
, vcpu
->arch
.ppr
);
1104 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1105 case KVM_REG_PPC_TFHAR
:
1106 *val
= get_reg_val(id
, vcpu
->arch
.tfhar
);
1108 case KVM_REG_PPC_TFIAR
:
1109 *val
= get_reg_val(id
, vcpu
->arch
.tfiar
);
1111 case KVM_REG_PPC_TEXASR
:
1112 *val
= get_reg_val(id
, vcpu
->arch
.texasr
);
1114 case KVM_REG_PPC_TM_GPR0
... KVM_REG_PPC_TM_GPR31
:
1115 i
= id
- KVM_REG_PPC_TM_GPR0
;
1116 *val
= get_reg_val(id
, vcpu
->arch
.gpr_tm
[i
]);
1118 case KVM_REG_PPC_TM_VSR0
... KVM_REG_PPC_TM_VSR63
:
1121 i
= id
- KVM_REG_PPC_TM_VSR0
;
1123 for (j
= 0; j
< TS_FPRWIDTH
; j
++)
1124 val
->vsxval
[j
] = vcpu
->arch
.fp_tm
.fpr
[i
][j
];
1126 if (cpu_has_feature(CPU_FTR_ALTIVEC
))
1127 val
->vval
= vcpu
->arch
.vr_tm
.vr
[i
-32];
1133 case KVM_REG_PPC_TM_CR
:
1134 *val
= get_reg_val(id
, vcpu
->arch
.cr_tm
);
1136 case KVM_REG_PPC_TM_LR
:
1137 *val
= get_reg_val(id
, vcpu
->arch
.lr_tm
);
1139 case KVM_REG_PPC_TM_CTR
:
1140 *val
= get_reg_val(id
, vcpu
->arch
.ctr_tm
);
1142 case KVM_REG_PPC_TM_FPSCR
:
1143 *val
= get_reg_val(id
, vcpu
->arch
.fp_tm
.fpscr
);
1145 case KVM_REG_PPC_TM_AMR
:
1146 *val
= get_reg_val(id
, vcpu
->arch
.amr_tm
);
1148 case KVM_REG_PPC_TM_PPR
:
1149 *val
= get_reg_val(id
, vcpu
->arch
.ppr_tm
);
1151 case KVM_REG_PPC_TM_VRSAVE
:
1152 *val
= get_reg_val(id
, vcpu
->arch
.vrsave_tm
);
1154 case KVM_REG_PPC_TM_VSCR
:
1155 if (cpu_has_feature(CPU_FTR_ALTIVEC
))
1156 *val
= get_reg_val(id
, vcpu
->arch
.vr_tm
.vscr
.u
[3]);
1160 case KVM_REG_PPC_TM_DSCR
:
1161 *val
= get_reg_val(id
, vcpu
->arch
.dscr_tm
);
1163 case KVM_REG_PPC_TM_TAR
:
1164 *val
= get_reg_val(id
, vcpu
->arch
.tar_tm
);
1167 case KVM_REG_PPC_ARCH_COMPAT
:
1168 *val
= get_reg_val(id
, vcpu
->arch
.vcore
->arch_compat
);
1178 static int kvmppc_set_one_reg_hv(struct kvm_vcpu
*vcpu
, u64 id
,
1179 union kvmppc_one_reg
*val
)
1183 unsigned long addr
, len
;
1186 case KVM_REG_PPC_HIOR
:
1187 /* Only allow this to be set to zero */
1188 if (set_reg_val(id
, *val
))
1191 case KVM_REG_PPC_DABR
:
1192 vcpu
->arch
.dabr
= set_reg_val(id
, *val
);
1194 case KVM_REG_PPC_DABRX
:
1195 vcpu
->arch
.dabrx
= set_reg_val(id
, *val
) & ~DABRX_HYP
;
1197 case KVM_REG_PPC_DSCR
:
1198 vcpu
->arch
.dscr
= set_reg_val(id
, *val
);
1200 case KVM_REG_PPC_PURR
:
1201 vcpu
->arch
.purr
= set_reg_val(id
, *val
);
1203 case KVM_REG_PPC_SPURR
:
1204 vcpu
->arch
.spurr
= set_reg_val(id
, *val
);
1206 case KVM_REG_PPC_AMR
:
1207 vcpu
->arch
.amr
= set_reg_val(id
, *val
);
1209 case KVM_REG_PPC_UAMOR
:
1210 vcpu
->arch
.uamor
= set_reg_val(id
, *val
);
1212 case KVM_REG_PPC_MMCR0
... KVM_REG_PPC_MMCRS
:
1213 i
= id
- KVM_REG_PPC_MMCR0
;
1214 vcpu
->arch
.mmcr
[i
] = set_reg_val(id
, *val
);
1216 case KVM_REG_PPC_PMC1
... KVM_REG_PPC_PMC8
:
1217 i
= id
- KVM_REG_PPC_PMC1
;
1218 vcpu
->arch
.pmc
[i
] = set_reg_val(id
, *val
);
1220 case KVM_REG_PPC_SPMC1
... KVM_REG_PPC_SPMC2
:
1221 i
= id
- KVM_REG_PPC_SPMC1
;
1222 vcpu
->arch
.spmc
[i
] = set_reg_val(id
, *val
);
1224 case KVM_REG_PPC_SIAR
:
1225 vcpu
->arch
.siar
= set_reg_val(id
, *val
);
1227 case KVM_REG_PPC_SDAR
:
1228 vcpu
->arch
.sdar
= set_reg_val(id
, *val
);
1230 case KVM_REG_PPC_SIER
:
1231 vcpu
->arch
.sier
= set_reg_val(id
, *val
);
1233 case KVM_REG_PPC_IAMR
:
1234 vcpu
->arch
.iamr
= set_reg_val(id
, *val
);
1236 case KVM_REG_PPC_PSPB
:
1237 vcpu
->arch
.pspb
= set_reg_val(id
, *val
);
1239 case KVM_REG_PPC_DPDES
:
1240 vcpu
->arch
.vcore
->dpdes
= set_reg_val(id
, *val
);
1242 case KVM_REG_PPC_DAWR
:
1243 vcpu
->arch
.dawr
= set_reg_val(id
, *val
);
1245 case KVM_REG_PPC_DAWRX
:
1246 vcpu
->arch
.dawrx
= set_reg_val(id
, *val
) & ~DAWRX_HYP
;
1248 case KVM_REG_PPC_CIABR
:
1249 vcpu
->arch
.ciabr
= set_reg_val(id
, *val
);
1250 /* Don't allow setting breakpoints in hypervisor code */
1251 if ((vcpu
->arch
.ciabr
& CIABR_PRIV
) == CIABR_PRIV_HYPER
)
1252 vcpu
->arch
.ciabr
&= ~CIABR_PRIV
; /* disable */
1254 case KVM_REG_PPC_CSIGR
:
1255 vcpu
->arch
.csigr
= set_reg_val(id
, *val
);
1257 case KVM_REG_PPC_TACR
:
1258 vcpu
->arch
.tacr
= set_reg_val(id
, *val
);
1260 case KVM_REG_PPC_TCSCR
:
1261 vcpu
->arch
.tcscr
= set_reg_val(id
, *val
);
1263 case KVM_REG_PPC_PID
:
1264 vcpu
->arch
.pid
= set_reg_val(id
, *val
);
1266 case KVM_REG_PPC_ACOP
:
1267 vcpu
->arch
.acop
= set_reg_val(id
, *val
);
1269 case KVM_REG_PPC_WORT
:
1270 vcpu
->arch
.wort
= set_reg_val(id
, *val
);
1272 case KVM_REG_PPC_VPA_ADDR
:
1273 addr
= set_reg_val(id
, *val
);
1275 if (!addr
&& (vcpu
->arch
.slb_shadow
.next_gpa
||
1276 vcpu
->arch
.dtl
.next_gpa
))
1278 r
= set_vpa(vcpu
, &vcpu
->arch
.vpa
, addr
, sizeof(struct lppaca
));
1280 case KVM_REG_PPC_VPA_SLB
:
1281 addr
= val
->vpaval
.addr
;
1282 len
= val
->vpaval
.length
;
1284 if (addr
&& !vcpu
->arch
.vpa
.next_gpa
)
1286 r
= set_vpa(vcpu
, &vcpu
->arch
.slb_shadow
, addr
, len
);
1288 case KVM_REG_PPC_VPA_DTL
:
1289 addr
= val
->vpaval
.addr
;
1290 len
= val
->vpaval
.length
;
1292 if (addr
&& (len
< sizeof(struct dtl_entry
) ||
1293 !vcpu
->arch
.vpa
.next_gpa
))
1295 len
-= len
% sizeof(struct dtl_entry
);
1296 r
= set_vpa(vcpu
, &vcpu
->arch
.dtl
, addr
, len
);
1298 case KVM_REG_PPC_TB_OFFSET
:
1299 /* round up to multiple of 2^24 */
1300 vcpu
->arch
.vcore
->tb_offset
=
1301 ALIGN(set_reg_val(id
, *val
), 1UL << 24);
1303 case KVM_REG_PPC_LPCR
:
1304 kvmppc_set_lpcr(vcpu
, set_reg_val(id
, *val
), true);
1306 case KVM_REG_PPC_LPCR_64
:
1307 kvmppc_set_lpcr(vcpu
, set_reg_val(id
, *val
), false);
1309 case KVM_REG_PPC_PPR
:
1310 vcpu
->arch
.ppr
= set_reg_val(id
, *val
);
1312 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1313 case KVM_REG_PPC_TFHAR
:
1314 vcpu
->arch
.tfhar
= set_reg_val(id
, *val
);
1316 case KVM_REG_PPC_TFIAR
:
1317 vcpu
->arch
.tfiar
= set_reg_val(id
, *val
);
1319 case KVM_REG_PPC_TEXASR
:
1320 vcpu
->arch
.texasr
= set_reg_val(id
, *val
);
1322 case KVM_REG_PPC_TM_GPR0
... KVM_REG_PPC_TM_GPR31
:
1323 i
= id
- KVM_REG_PPC_TM_GPR0
;
1324 vcpu
->arch
.gpr_tm
[i
] = set_reg_val(id
, *val
);
1326 case KVM_REG_PPC_TM_VSR0
... KVM_REG_PPC_TM_VSR63
:
1329 i
= id
- KVM_REG_PPC_TM_VSR0
;
1331 for (j
= 0; j
< TS_FPRWIDTH
; j
++)
1332 vcpu
->arch
.fp_tm
.fpr
[i
][j
] = val
->vsxval
[j
];
1334 if (cpu_has_feature(CPU_FTR_ALTIVEC
))
1335 vcpu
->arch
.vr_tm
.vr
[i
-32] = val
->vval
;
1340 case KVM_REG_PPC_TM_CR
:
1341 vcpu
->arch
.cr_tm
= set_reg_val(id
, *val
);
1343 case KVM_REG_PPC_TM_LR
:
1344 vcpu
->arch
.lr_tm
= set_reg_val(id
, *val
);
1346 case KVM_REG_PPC_TM_CTR
:
1347 vcpu
->arch
.ctr_tm
= set_reg_val(id
, *val
);
1349 case KVM_REG_PPC_TM_FPSCR
:
1350 vcpu
->arch
.fp_tm
.fpscr
= set_reg_val(id
, *val
);
1352 case KVM_REG_PPC_TM_AMR
:
1353 vcpu
->arch
.amr_tm
= set_reg_val(id
, *val
);
1355 case KVM_REG_PPC_TM_PPR
:
1356 vcpu
->arch
.ppr_tm
= set_reg_val(id
, *val
);
1358 case KVM_REG_PPC_TM_VRSAVE
:
1359 vcpu
->arch
.vrsave_tm
= set_reg_val(id
, *val
);
1361 case KVM_REG_PPC_TM_VSCR
:
1362 if (cpu_has_feature(CPU_FTR_ALTIVEC
))
1363 vcpu
->arch
.vr
.vscr
.u
[3] = set_reg_val(id
, *val
);
1367 case KVM_REG_PPC_TM_DSCR
:
1368 vcpu
->arch
.dscr_tm
= set_reg_val(id
, *val
);
1370 case KVM_REG_PPC_TM_TAR
:
1371 vcpu
->arch
.tar_tm
= set_reg_val(id
, *val
);
1374 case KVM_REG_PPC_ARCH_COMPAT
:
1375 r
= kvmppc_set_arch_compat(vcpu
, set_reg_val(id
, *val
));
1385 static struct kvmppc_vcore
*kvmppc_vcore_create(struct kvm
*kvm
, int core
)
1387 struct kvmppc_vcore
*vcore
;
1389 vcore
= kzalloc(sizeof(struct kvmppc_vcore
), GFP_KERNEL
);
1394 INIT_LIST_HEAD(&vcore
->runnable_threads
);
1395 spin_lock_init(&vcore
->lock
);
1396 spin_lock_init(&vcore
->stoltb_lock
);
1397 init_waitqueue_head(&vcore
->wq
);
1398 vcore
->preempt_tb
= TB_NIL
;
1399 vcore
->lpcr
= kvm
->arch
.lpcr
;
1400 vcore
->first_vcpuid
= core
* threads_per_subcore
;
1403 vcore
->mpp_buffer_is_valid
= false;
1405 if (cpu_has_feature(CPU_FTR_ARCH_207S
))
1406 vcore
->mpp_buffer
= (void *)__get_free_pages(
1407 GFP_KERNEL
|__GFP_ZERO
,
1413 static struct kvm_vcpu
*kvmppc_core_vcpu_create_hv(struct kvm
*kvm
,
1416 struct kvm_vcpu
*vcpu
;
1419 struct kvmppc_vcore
*vcore
;
1421 core
= id
/ threads_per_subcore
;
1422 if (core
>= KVM_MAX_VCORES
)
1426 vcpu
= kmem_cache_zalloc(kvm_vcpu_cache
, GFP_KERNEL
);
1430 err
= kvm_vcpu_init(vcpu
, kvm
, id
);
1434 vcpu
->arch
.shared
= &vcpu
->arch
.shregs
;
1435 #ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE
1437 * The shared struct is never shared on HV,
1438 * so we can always use host endianness
1440 #ifdef __BIG_ENDIAN__
1441 vcpu
->arch
.shared_big_endian
= true;
1443 vcpu
->arch
.shared_big_endian
= false;
1446 vcpu
->arch
.mmcr
[0] = MMCR0_FC
;
1447 vcpu
->arch
.ctrl
= CTRL_RUNLATCH
;
1448 /* default to host PVR, since we can't spoof it */
1449 kvmppc_set_pvr_hv(vcpu
, mfspr(SPRN_PVR
));
1450 spin_lock_init(&vcpu
->arch
.vpa_update_lock
);
1451 spin_lock_init(&vcpu
->arch
.tbacct_lock
);
1452 vcpu
->arch
.busy_preempt
= TB_NIL
;
1453 vcpu
->arch
.intr_msr
= MSR_SF
| MSR_ME
;
1455 kvmppc_mmu_book3s_hv_init(vcpu
);
1457 vcpu
->arch
.state
= KVMPPC_VCPU_NOTREADY
;
1459 init_waitqueue_head(&vcpu
->arch
.cpu_run
);
1461 mutex_lock(&kvm
->lock
);
1462 vcore
= kvm
->arch
.vcores
[core
];
1464 vcore
= kvmppc_vcore_create(kvm
, core
);
1465 kvm
->arch
.vcores
[core
] = vcore
;
1466 kvm
->arch
.online_vcores
++;
1468 mutex_unlock(&kvm
->lock
);
1473 spin_lock(&vcore
->lock
);
1474 ++vcore
->num_threads
;
1475 spin_unlock(&vcore
->lock
);
1476 vcpu
->arch
.vcore
= vcore
;
1477 vcpu
->arch
.ptid
= vcpu
->vcpu_id
- vcore
->first_vcpuid
;
1479 vcpu
->arch
.cpu_type
= KVM_CPU_3S_64
;
1480 kvmppc_sanity_check(vcpu
);
1485 kmem_cache_free(kvm_vcpu_cache
, vcpu
);
1487 return ERR_PTR(err
);
1490 static void unpin_vpa(struct kvm
*kvm
, struct kvmppc_vpa
*vpa
)
1492 if (vpa
->pinned_addr
)
1493 kvmppc_unpin_guest_page(kvm
, vpa
->pinned_addr
, vpa
->gpa
,
1497 static void kvmppc_core_vcpu_free_hv(struct kvm_vcpu
*vcpu
)
1499 spin_lock(&vcpu
->arch
.vpa_update_lock
);
1500 unpin_vpa(vcpu
->kvm
, &vcpu
->arch
.dtl
);
1501 unpin_vpa(vcpu
->kvm
, &vcpu
->arch
.slb_shadow
);
1502 unpin_vpa(vcpu
->kvm
, &vcpu
->arch
.vpa
);
1503 spin_unlock(&vcpu
->arch
.vpa_update_lock
);
1504 kvm_vcpu_uninit(vcpu
);
1505 kmem_cache_free(kvm_vcpu_cache
, vcpu
);
1508 static int kvmppc_core_check_requests_hv(struct kvm_vcpu
*vcpu
)
1510 /* Indicate we want to get back into the guest */
1514 static void kvmppc_set_timer(struct kvm_vcpu
*vcpu
)
1516 unsigned long dec_nsec
, now
;
1519 if (now
> vcpu
->arch
.dec_expires
) {
1520 /* decrementer has already gone negative */
1521 kvmppc_core_queue_dec(vcpu
);
1522 kvmppc_core_prepare_to_enter(vcpu
);
1525 dec_nsec
= (vcpu
->arch
.dec_expires
- now
) * NSEC_PER_SEC
1527 hrtimer_start(&vcpu
->arch
.dec_timer
, ktime_set(0, dec_nsec
),
1529 vcpu
->arch
.timer_running
= 1;
1532 static void kvmppc_end_cede(struct kvm_vcpu
*vcpu
)
1534 vcpu
->arch
.ceded
= 0;
1535 if (vcpu
->arch
.timer_running
) {
1536 hrtimer_try_to_cancel(&vcpu
->arch
.dec_timer
);
1537 vcpu
->arch
.timer_running
= 0;
1541 extern void __kvmppc_vcore_entry(void);
1543 static void kvmppc_remove_runnable(struct kvmppc_vcore
*vc
,
1544 struct kvm_vcpu
*vcpu
)
1548 if (vcpu
->arch
.state
!= KVMPPC_VCPU_RUNNABLE
)
1550 spin_lock_irq(&vcpu
->arch
.tbacct_lock
);
1552 vcpu
->arch
.busy_stolen
+= vcore_stolen_time(vc
, now
) -
1553 vcpu
->arch
.stolen_logged
;
1554 vcpu
->arch
.busy_preempt
= now
;
1555 vcpu
->arch
.state
= KVMPPC_VCPU_BUSY_IN_HOST
;
1556 spin_unlock_irq(&vcpu
->arch
.tbacct_lock
);
1558 list_del(&vcpu
->arch
.run_list
);
1561 static int kvmppc_grab_hwthread(int cpu
)
1563 struct paca_struct
*tpaca
;
1564 long timeout
= 10000;
1568 /* Ensure the thread won't go into the kernel if it wakes */
1569 tpaca
->kvm_hstate
.hwthread_req
= 1;
1570 tpaca
->kvm_hstate
.kvm_vcpu
= NULL
;
1573 * If the thread is already executing in the kernel (e.g. handling
1574 * a stray interrupt), wait for it to get back to nap mode.
1575 * The smp_mb() is to ensure that our setting of hwthread_req
1576 * is visible before we look at hwthread_state, so if this
1577 * races with the code at system_reset_pSeries and the thread
1578 * misses our setting of hwthread_req, we are sure to see its
1579 * setting of hwthread_state, and vice versa.
1582 while (tpaca
->kvm_hstate
.hwthread_state
== KVM_HWTHREAD_IN_KERNEL
) {
1583 if (--timeout
<= 0) {
1584 pr_err("KVM: couldn't grab cpu %d\n", cpu
);
1592 static void kvmppc_release_hwthread(int cpu
)
1594 struct paca_struct
*tpaca
;
1597 tpaca
->kvm_hstate
.hwthread_req
= 0;
1598 tpaca
->kvm_hstate
.kvm_vcpu
= NULL
;
1601 static void kvmppc_start_thread(struct kvm_vcpu
*vcpu
)
1604 struct paca_struct
*tpaca
;
1605 struct kvmppc_vcore
*vc
= vcpu
->arch
.vcore
;
1607 if (vcpu
->arch
.timer_running
) {
1608 hrtimer_try_to_cancel(&vcpu
->arch
.dec_timer
);
1609 vcpu
->arch
.timer_running
= 0;
1611 cpu
= vc
->pcpu
+ vcpu
->arch
.ptid
;
1613 tpaca
->kvm_hstate
.kvm_vcpu
= vcpu
;
1614 tpaca
->kvm_hstate
.kvm_vcore
= vc
;
1615 tpaca
->kvm_hstate
.ptid
= vcpu
->arch
.ptid
;
1616 vcpu
->cpu
= vc
->pcpu
;
1618 #if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP)
1619 if (cpu
!= smp_processor_id()) {
1621 if (vcpu
->arch
.ptid
)
1627 static void kvmppc_wait_for_nap(struct kvmppc_vcore
*vc
)
1633 while (vc
->nap_count
< vc
->n_woken
) {
1634 if (++i
>= 1000000) {
1635 pr_err("kvmppc_wait_for_nap timeout %d %d\n",
1636 vc
->nap_count
, vc
->n_woken
);
1645 * Check that we are on thread 0 and that any other threads in
1646 * this core are off-line. Then grab the threads so they can't
1649 static int on_primary_thread(void)
1651 int cpu
= smp_processor_id();
1654 /* Are we on a primary subcore? */
1655 if (cpu_thread_in_subcore(cpu
))
1659 while (++thr
< threads_per_subcore
)
1660 if (cpu_online(cpu
+ thr
))
1663 /* Grab all hw threads so they can't go into the kernel */
1664 for (thr
= 1; thr
< threads_per_subcore
; ++thr
) {
1665 if (kvmppc_grab_hwthread(cpu
+ thr
)) {
1666 /* Couldn't grab one; let the others go */
1668 kvmppc_release_hwthread(cpu
+ thr
);
1669 } while (--thr
> 0);
1676 static void kvmppc_start_saving_l2_cache(struct kvmppc_vcore
*vc
)
1678 phys_addr_t phy_addr
, mpp_addr
;
1680 phy_addr
= (phys_addr_t
)virt_to_phys(vc
->mpp_buffer
);
1681 mpp_addr
= phy_addr
& PPC_MPPE_ADDRESS_MASK
;
1683 mtspr(SPRN_MPPR
, mpp_addr
| PPC_MPPR_FETCH_ABORT
);
1684 logmpp(mpp_addr
| PPC_LOGMPP_LOG_L2
);
1686 vc
->mpp_buffer_is_valid
= true;
1689 static void kvmppc_start_restoring_l2_cache(const struct kvmppc_vcore
*vc
)
1691 phys_addr_t phy_addr
, mpp_addr
;
1693 phy_addr
= virt_to_phys(vc
->mpp_buffer
);
1694 mpp_addr
= phy_addr
& PPC_MPPE_ADDRESS_MASK
;
1696 /* We must abort any in-progress save operations to ensure
1697 * the table is valid so that prefetch engine knows when to
1698 * stop prefetching. */
1699 logmpp(mpp_addr
| PPC_LOGMPP_LOG_ABORT
);
1700 mtspr(SPRN_MPPR
, mpp_addr
| PPC_MPPR_FETCH_WHOLE_TABLE
);
1704 * Run a set of guest threads on a physical core.
1705 * Called with vc->lock held.
1707 static void kvmppc_run_core(struct kvmppc_vcore
*vc
)
1709 struct kvm_vcpu
*vcpu
, *vnext
;
1712 int i
, need_vpa_update
;
1714 struct kvm_vcpu
*vcpus_to_update
[threads_per_core
];
1716 /* don't start if any threads have a signal pending */
1717 need_vpa_update
= 0;
1718 list_for_each_entry(vcpu
, &vc
->runnable_threads
, arch
.run_list
) {
1719 if (signal_pending(vcpu
->arch
.run_task
))
1721 if (vcpu
->arch
.vpa
.update_pending
||
1722 vcpu
->arch
.slb_shadow
.update_pending
||
1723 vcpu
->arch
.dtl
.update_pending
)
1724 vcpus_to_update
[need_vpa_update
++] = vcpu
;
1728 * Initialize *vc, in particular vc->vcore_state, so we can
1729 * drop the vcore lock if necessary.
1733 vc
->entry_exit_count
= 0;
1734 vc
->preempt_tb
= TB_NIL
;
1735 vc
->vcore_state
= VCORE_STARTING
;
1737 vc
->napping_threads
= 0;
1738 vc
->conferring_threads
= 0;
1741 * Updating any of the vpas requires calling kvmppc_pin_guest_page,
1742 * which can't be called with any spinlocks held.
1744 if (need_vpa_update
) {
1745 spin_unlock(&vc
->lock
);
1746 for (i
= 0; i
< need_vpa_update
; ++i
)
1747 kvmppc_update_vpas(vcpus_to_update
[i
]);
1748 spin_lock(&vc
->lock
);
1752 * Make sure we are running on primary threads, and that secondary
1753 * threads are offline. Also check if the number of threads in this
1754 * guest are greater than the current system threads per guest.
1756 if ((threads_per_core
> 1) &&
1757 ((vc
->num_threads
> threads_per_subcore
) || !on_primary_thread())) {
1758 list_for_each_entry(vcpu
, &vc
->runnable_threads
, arch
.run_list
)
1759 vcpu
->arch
.ret
= -EBUSY
;
1764 vc
->pcpu
= smp_processor_id();
1765 list_for_each_entry(vcpu
, &vc
->runnable_threads
, arch
.run_list
) {
1766 kvmppc_start_thread(vcpu
);
1767 kvmppc_create_dtl_entry(vcpu
, vc
);
1768 trace_kvm_guest_enter(vcpu
);
1771 /* Set this explicitly in case thread 0 doesn't have a vcpu */
1772 get_paca()->kvm_hstate
.kvm_vcore
= vc
;
1773 get_paca()->kvm_hstate
.ptid
= 0;
1775 vc
->vcore_state
= VCORE_RUNNING
;
1778 trace_kvmppc_run_core(vc
, 0);
1780 spin_unlock(&vc
->lock
);
1784 srcu_idx
= srcu_read_lock(&vc
->kvm
->srcu
);
1786 if (vc
->mpp_buffer_is_valid
)
1787 kvmppc_start_restoring_l2_cache(vc
);
1789 __kvmppc_vcore_entry();
1791 spin_lock(&vc
->lock
);
1794 kvmppc_start_saving_l2_cache(vc
);
1796 /* disable sending of IPIs on virtual external irqs */
1797 list_for_each_entry(vcpu
, &vc
->runnable_threads
, arch
.run_list
)
1799 /* wait for secondary threads to finish writing their state to memory */
1800 if (vc
->nap_count
< vc
->n_woken
)
1801 kvmppc_wait_for_nap(vc
);
1802 for (i
= 0; i
< threads_per_subcore
; ++i
)
1803 kvmppc_release_hwthread(vc
->pcpu
+ i
);
1804 /* prevent other vcpu threads from doing kvmppc_start_thread() now */
1805 vc
->vcore_state
= VCORE_EXITING
;
1806 spin_unlock(&vc
->lock
);
1808 srcu_read_unlock(&vc
->kvm
->srcu
, srcu_idx
);
1810 /* make sure updates to secondary vcpu structs are visible now */
1817 spin_lock(&vc
->lock
);
1819 list_for_each_entry(vcpu
, &vc
->runnable_threads
, arch
.run_list
) {
1820 /* cancel pending dec exception if dec is positive */
1821 if (now
< vcpu
->arch
.dec_expires
&&
1822 kvmppc_core_pending_dec(vcpu
))
1823 kvmppc_core_dequeue_dec(vcpu
);
1825 trace_kvm_guest_exit(vcpu
);
1828 if (vcpu
->arch
.trap
)
1829 ret
= kvmppc_handle_exit_hv(vcpu
->arch
.kvm_run
, vcpu
,
1830 vcpu
->arch
.run_task
);
1832 vcpu
->arch
.ret
= ret
;
1833 vcpu
->arch
.trap
= 0;
1835 if (vcpu
->arch
.ceded
) {
1836 if (!is_kvmppc_resume_guest(ret
))
1837 kvmppc_end_cede(vcpu
);
1839 kvmppc_set_timer(vcpu
);
1844 vc
->vcore_state
= VCORE_INACTIVE
;
1845 list_for_each_entry_safe(vcpu
, vnext
, &vc
->runnable_threads
,
1847 if (!is_kvmppc_resume_guest(vcpu
->arch
.ret
)) {
1848 kvmppc_remove_runnable(vc
, vcpu
);
1849 wake_up(&vcpu
->arch
.cpu_run
);
1853 trace_kvmppc_run_core(vc
, 1);
1857 * Wait for some other vcpu thread to execute us, and
1858 * wake us up when we need to handle something in the host.
1860 static void kvmppc_wait_for_exec(struct kvm_vcpu
*vcpu
, int wait_state
)
1864 prepare_to_wait(&vcpu
->arch
.cpu_run
, &wait
, wait_state
);
1865 if (vcpu
->arch
.state
== KVMPPC_VCPU_RUNNABLE
)
1867 finish_wait(&vcpu
->arch
.cpu_run
, &wait
);
1871 * All the vcpus in this vcore are idle, so wait for a decrementer
1872 * or external interrupt to one of the vcpus. vc->lock is held.
1874 static void kvmppc_vcore_blocked(struct kvmppc_vcore
*vc
)
1876 struct kvm_vcpu
*vcpu
;
1881 prepare_to_wait(&vc
->wq
, &wait
, TASK_INTERRUPTIBLE
);
1884 * Check one last time for pending exceptions and ceded state after
1885 * we put ourselves on the wait queue
1887 list_for_each_entry(vcpu
, &vc
->runnable_threads
, arch
.run_list
) {
1888 if (vcpu
->arch
.pending_exceptions
|| !vcpu
->arch
.ceded
) {
1895 finish_wait(&vc
->wq
, &wait
);
1899 vc
->vcore_state
= VCORE_SLEEPING
;
1900 trace_kvmppc_vcore_blocked(vc
, 0);
1901 spin_unlock(&vc
->lock
);
1903 finish_wait(&vc
->wq
, &wait
);
1904 spin_lock(&vc
->lock
);
1905 vc
->vcore_state
= VCORE_INACTIVE
;
1906 trace_kvmppc_vcore_blocked(vc
, 1);
1909 static int kvmppc_run_vcpu(struct kvm_run
*kvm_run
, struct kvm_vcpu
*vcpu
)
1912 struct kvmppc_vcore
*vc
;
1913 struct kvm_vcpu
*v
, *vn
;
1915 trace_kvmppc_run_vcpu_enter(vcpu
);
1917 kvm_run
->exit_reason
= 0;
1918 vcpu
->arch
.ret
= RESUME_GUEST
;
1919 vcpu
->arch
.trap
= 0;
1920 kvmppc_update_vpas(vcpu
);
1923 * Synchronize with other threads in this virtual core
1925 vc
= vcpu
->arch
.vcore
;
1926 spin_lock(&vc
->lock
);
1927 vcpu
->arch
.ceded
= 0;
1928 vcpu
->arch
.run_task
= current
;
1929 vcpu
->arch
.kvm_run
= kvm_run
;
1930 vcpu
->arch
.stolen_logged
= vcore_stolen_time(vc
, mftb());
1931 vcpu
->arch
.state
= KVMPPC_VCPU_RUNNABLE
;
1932 vcpu
->arch
.busy_preempt
= TB_NIL
;
1933 list_add_tail(&vcpu
->arch
.run_list
, &vc
->runnable_threads
);
1937 * This happens the first time this is called for a vcpu.
1938 * If the vcore is already running, we may be able to start
1939 * this thread straight away and have it join in.
1941 if (!signal_pending(current
)) {
1942 if (vc
->vcore_state
== VCORE_RUNNING
&&
1943 VCORE_EXIT_COUNT(vc
) == 0) {
1944 kvmppc_create_dtl_entry(vcpu
, vc
);
1945 kvmppc_start_thread(vcpu
);
1946 trace_kvm_guest_enter(vcpu
);
1947 } else if (vc
->vcore_state
== VCORE_SLEEPING
) {
1953 while (vcpu
->arch
.state
== KVMPPC_VCPU_RUNNABLE
&&
1954 !signal_pending(current
)) {
1955 if (vc
->vcore_state
!= VCORE_INACTIVE
) {
1956 spin_unlock(&vc
->lock
);
1957 kvmppc_wait_for_exec(vcpu
, TASK_INTERRUPTIBLE
);
1958 spin_lock(&vc
->lock
);
1961 list_for_each_entry_safe(v
, vn
, &vc
->runnable_threads
,
1963 kvmppc_core_prepare_to_enter(v
);
1964 if (signal_pending(v
->arch
.run_task
)) {
1965 kvmppc_remove_runnable(vc
, v
);
1966 v
->stat
.signal_exits
++;
1967 v
->arch
.kvm_run
->exit_reason
= KVM_EXIT_INTR
;
1968 v
->arch
.ret
= -EINTR
;
1969 wake_up(&v
->arch
.cpu_run
);
1972 if (!vc
->n_runnable
|| vcpu
->arch
.state
!= KVMPPC_VCPU_RUNNABLE
)
1976 list_for_each_entry(v
, &vc
->runnable_threads
, arch
.run_list
) {
1977 if (!v
->arch
.pending_exceptions
)
1978 n_ceded
+= v
->arch
.ceded
;
1982 if (n_ceded
== vc
->n_runnable
)
1983 kvmppc_vcore_blocked(vc
);
1985 kvmppc_run_core(vc
);
1989 while (vcpu
->arch
.state
== KVMPPC_VCPU_RUNNABLE
&&
1990 (vc
->vcore_state
== VCORE_RUNNING
||
1991 vc
->vcore_state
== VCORE_EXITING
)) {
1992 spin_unlock(&vc
->lock
);
1993 kvmppc_wait_for_exec(vcpu
, TASK_UNINTERRUPTIBLE
);
1994 spin_lock(&vc
->lock
);
1997 if (vcpu
->arch
.state
== KVMPPC_VCPU_RUNNABLE
) {
1998 kvmppc_remove_runnable(vc
, vcpu
);
1999 vcpu
->stat
.signal_exits
++;
2000 kvm_run
->exit_reason
= KVM_EXIT_INTR
;
2001 vcpu
->arch
.ret
= -EINTR
;
2004 if (vc
->n_runnable
&& vc
->vcore_state
== VCORE_INACTIVE
) {
2005 /* Wake up some vcpu to run the core */
2006 v
= list_first_entry(&vc
->runnable_threads
,
2007 struct kvm_vcpu
, arch
.run_list
);
2008 wake_up(&v
->arch
.cpu_run
);
2011 trace_kvmppc_run_vcpu_exit(vcpu
, kvm_run
);
2012 spin_unlock(&vc
->lock
);
2013 return vcpu
->arch
.ret
;
2016 static int kvmppc_vcpu_run_hv(struct kvm_run
*run
, struct kvm_vcpu
*vcpu
)
2021 if (!vcpu
->arch
.sane
) {
2022 run
->exit_reason
= KVM_EXIT_INTERNAL_ERROR
;
2026 kvmppc_core_prepare_to_enter(vcpu
);
2028 /* No need to go into the guest when all we'll do is come back out */
2029 if (signal_pending(current
)) {
2030 run
->exit_reason
= KVM_EXIT_INTR
;
2034 atomic_inc(&vcpu
->kvm
->arch
.vcpus_running
);
2035 /* Order vcpus_running vs. rma_setup_done, see kvmppc_alloc_reset_hpt */
2038 /* On the first time here, set up HTAB and VRMA */
2039 if (!vcpu
->kvm
->arch
.rma_setup_done
) {
2040 r
= kvmppc_hv_setup_htab_rma(vcpu
);
2045 flush_fp_to_thread(current
);
2046 flush_altivec_to_thread(current
);
2047 flush_vsx_to_thread(current
);
2048 vcpu
->arch
.wqp
= &vcpu
->arch
.vcore
->wq
;
2049 vcpu
->arch
.pgdir
= current
->mm
->pgd
;
2050 vcpu
->arch
.state
= KVMPPC_VCPU_BUSY_IN_HOST
;
2053 r
= kvmppc_run_vcpu(run
, vcpu
);
2055 if (run
->exit_reason
== KVM_EXIT_PAPR_HCALL
&&
2056 !(vcpu
->arch
.shregs
.msr
& MSR_PR
)) {
2057 trace_kvm_hcall_enter(vcpu
);
2058 r
= kvmppc_pseries_do_hcall(vcpu
);
2059 trace_kvm_hcall_exit(vcpu
, r
);
2060 kvmppc_core_prepare_to_enter(vcpu
);
2061 } else if (r
== RESUME_PAGE_FAULT
) {
2062 srcu_idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
2063 r
= kvmppc_book3s_hv_page_fault(run
, vcpu
,
2064 vcpu
->arch
.fault_dar
, vcpu
->arch
.fault_dsisr
);
2065 srcu_read_unlock(&vcpu
->kvm
->srcu
, srcu_idx
);
2067 } while (is_kvmppc_resume_guest(r
));
2070 vcpu
->arch
.state
= KVMPPC_VCPU_NOTREADY
;
2071 atomic_dec(&vcpu
->kvm
->arch
.vcpus_running
);
2075 static void kvmppc_add_seg_page_size(struct kvm_ppc_one_seg_page_size
**sps
,
2078 struct mmu_psize_def
*def
= &mmu_psize_defs
[linux_psize
];
2082 (*sps
)->page_shift
= def
->shift
;
2083 (*sps
)->slb_enc
= def
->sllp
;
2084 (*sps
)->enc
[0].page_shift
= def
->shift
;
2085 (*sps
)->enc
[0].pte_enc
= def
->penc
[linux_psize
];
2087 * Add 16MB MPSS support if host supports it
2089 if (linux_psize
!= MMU_PAGE_16M
&& def
->penc
[MMU_PAGE_16M
] != -1) {
2090 (*sps
)->enc
[1].page_shift
= 24;
2091 (*sps
)->enc
[1].pte_enc
= def
->penc
[MMU_PAGE_16M
];
2096 static int kvm_vm_ioctl_get_smmu_info_hv(struct kvm
*kvm
,
2097 struct kvm_ppc_smmu_info
*info
)
2099 struct kvm_ppc_one_seg_page_size
*sps
;
2101 info
->flags
= KVM_PPC_PAGE_SIZES_REAL
;
2102 if (mmu_has_feature(MMU_FTR_1T_SEGMENT
))
2103 info
->flags
|= KVM_PPC_1T_SEGMENTS
;
2104 info
->slb_size
= mmu_slb_size
;
2106 /* We only support these sizes for now, and no muti-size segments */
2107 sps
= &info
->sps
[0];
2108 kvmppc_add_seg_page_size(&sps
, MMU_PAGE_4K
);
2109 kvmppc_add_seg_page_size(&sps
, MMU_PAGE_64K
);
2110 kvmppc_add_seg_page_size(&sps
, MMU_PAGE_16M
);
2116 * Get (and clear) the dirty memory log for a memory slot.
2118 static int kvm_vm_ioctl_get_dirty_log_hv(struct kvm
*kvm
,
2119 struct kvm_dirty_log
*log
)
2121 struct kvm_memory_slot
*memslot
;
2125 mutex_lock(&kvm
->slots_lock
);
2128 if (log
->slot
>= KVM_USER_MEM_SLOTS
)
2131 memslot
= id_to_memslot(kvm
->memslots
, log
->slot
);
2133 if (!memslot
->dirty_bitmap
)
2136 n
= kvm_dirty_bitmap_bytes(memslot
);
2137 memset(memslot
->dirty_bitmap
, 0, n
);
2139 r
= kvmppc_hv_get_dirty_log(kvm
, memslot
, memslot
->dirty_bitmap
);
2144 if (copy_to_user(log
->dirty_bitmap
, memslot
->dirty_bitmap
, n
))
2149 mutex_unlock(&kvm
->slots_lock
);
2153 static void kvmppc_core_free_memslot_hv(struct kvm_memory_slot
*free
,
2154 struct kvm_memory_slot
*dont
)
2156 if (!dont
|| free
->arch
.rmap
!= dont
->arch
.rmap
) {
2157 vfree(free
->arch
.rmap
);
2158 free
->arch
.rmap
= NULL
;
2162 static int kvmppc_core_create_memslot_hv(struct kvm_memory_slot
*slot
,
2163 unsigned long npages
)
2165 slot
->arch
.rmap
= vzalloc(npages
* sizeof(*slot
->arch
.rmap
));
2166 if (!slot
->arch
.rmap
)
2172 static int kvmppc_core_prepare_memory_region_hv(struct kvm
*kvm
,
2173 struct kvm_memory_slot
*memslot
,
2174 struct kvm_userspace_memory_region
*mem
)
2179 static void kvmppc_core_commit_memory_region_hv(struct kvm
*kvm
,
2180 struct kvm_userspace_memory_region
*mem
,
2181 const struct kvm_memory_slot
*old
)
2183 unsigned long npages
= mem
->memory_size
>> PAGE_SHIFT
;
2184 struct kvm_memory_slot
*memslot
;
2186 if (npages
&& old
->npages
) {
2188 * If modifying a memslot, reset all the rmap dirty bits.
2189 * If this is a new memslot, we don't need to do anything
2190 * since the rmap array starts out as all zeroes,
2191 * i.e. no pages are dirty.
2193 memslot
= id_to_memslot(kvm
->memslots
, mem
->slot
);
2194 kvmppc_hv_get_dirty_log(kvm
, memslot
, NULL
);
2199 * Update LPCR values in kvm->arch and in vcores.
2200 * Caller must hold kvm->lock.
2202 void kvmppc_update_lpcr(struct kvm
*kvm
, unsigned long lpcr
, unsigned long mask
)
2207 if ((kvm
->arch
.lpcr
& mask
) == lpcr
)
2210 kvm
->arch
.lpcr
= (kvm
->arch
.lpcr
& ~mask
) | lpcr
;
2212 for (i
= 0; i
< KVM_MAX_VCORES
; ++i
) {
2213 struct kvmppc_vcore
*vc
= kvm
->arch
.vcores
[i
];
2216 spin_lock(&vc
->lock
);
2217 vc
->lpcr
= (vc
->lpcr
& ~mask
) | lpcr
;
2218 spin_unlock(&vc
->lock
);
2219 if (++cores_done
>= kvm
->arch
.online_vcores
)
2224 static void kvmppc_mmu_destroy_hv(struct kvm_vcpu
*vcpu
)
2229 static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu
*vcpu
)
2232 struct kvm
*kvm
= vcpu
->kvm
;
2234 struct kvm_memory_slot
*memslot
;
2235 struct vm_area_struct
*vma
;
2236 unsigned long lpcr
= 0, senc
;
2237 unsigned long psize
, porder
;
2240 mutex_lock(&kvm
->lock
);
2241 if (kvm
->arch
.rma_setup_done
)
2242 goto out
; /* another vcpu beat us to it */
2244 /* Allocate hashed page table (if not done already) and reset it */
2245 if (!kvm
->arch
.hpt_virt
) {
2246 err
= kvmppc_alloc_hpt(kvm
, NULL
);
2248 pr_err("KVM: Couldn't alloc HPT\n");
2253 /* Look up the memslot for guest physical address 0 */
2254 srcu_idx
= srcu_read_lock(&kvm
->srcu
);
2255 memslot
= gfn_to_memslot(kvm
, 0);
2257 /* We must have some memory at 0 by now */
2259 if (!memslot
|| (memslot
->flags
& KVM_MEMSLOT_INVALID
))
2262 /* Look up the VMA for the start of this memory slot */
2263 hva
= memslot
->userspace_addr
;
2264 down_read(¤t
->mm
->mmap_sem
);
2265 vma
= find_vma(current
->mm
, hva
);
2266 if (!vma
|| vma
->vm_start
> hva
|| (vma
->vm_flags
& VM_IO
))
2269 psize
= vma_kernel_pagesize(vma
);
2270 porder
= __ilog2(psize
);
2272 up_read(¤t
->mm
->mmap_sem
);
2274 /* We can handle 4k, 64k or 16M pages in the VRMA */
2276 if (!(psize
== 0x1000 || psize
== 0x10000 ||
2277 psize
== 0x1000000))
2280 /* Update VRMASD field in the LPCR */
2281 senc
= slb_pgsize_encoding(psize
);
2282 kvm
->arch
.vrma_slb_v
= senc
| SLB_VSID_B_1T
|
2283 (VRMA_VSID
<< SLB_VSID_SHIFT_1T
);
2284 /* the -4 is to account for senc values starting at 0x10 */
2285 lpcr
= senc
<< (LPCR_VRMASD_SH
- 4);
2287 /* Create HPTEs in the hash page table for the VRMA */
2288 kvmppc_map_vrma(vcpu
, memslot
, porder
);
2290 kvmppc_update_lpcr(kvm
, lpcr
, LPCR_VRMASD
);
2292 /* Order updates to kvm->arch.lpcr etc. vs. rma_setup_done */
2294 kvm
->arch
.rma_setup_done
= 1;
2297 srcu_read_unlock(&kvm
->srcu
, srcu_idx
);
2299 mutex_unlock(&kvm
->lock
);
2303 up_read(¤t
->mm
->mmap_sem
);
2307 static int kvmppc_core_init_vm_hv(struct kvm
*kvm
)
2309 unsigned long lpcr
, lpid
;
2311 /* Allocate the guest's logical partition ID */
2313 lpid
= kvmppc_alloc_lpid();
2316 kvm
->arch
.lpid
= lpid
;
2319 * Since we don't flush the TLB when tearing down a VM,
2320 * and this lpid might have previously been used,
2321 * make sure we flush on each core before running the new VM.
2323 cpumask_setall(&kvm
->arch
.need_tlb_flush
);
2325 /* Start out with the default set of hcalls enabled */
2326 memcpy(kvm
->arch
.enabled_hcalls
, default_enabled_hcalls
,
2327 sizeof(kvm
->arch
.enabled_hcalls
));
2329 kvm
->arch
.host_sdr1
= mfspr(SPRN_SDR1
);
2331 /* Init LPCR for virtual RMA mode */
2332 kvm
->arch
.host_lpid
= mfspr(SPRN_LPID
);
2333 kvm
->arch
.host_lpcr
= lpcr
= mfspr(SPRN_LPCR
);
2334 lpcr
&= LPCR_PECE
| LPCR_LPES
;
2335 lpcr
|= (4UL << LPCR_DPFD_SH
) | LPCR_HDICE
|
2336 LPCR_VPM0
| LPCR_VPM1
;
2337 kvm
->arch
.vrma_slb_v
= SLB_VSID_B_1T
|
2338 (VRMA_VSID
<< SLB_VSID_SHIFT_1T
);
2339 /* On POWER8 turn on online bit to enable PURR/SPURR */
2340 if (cpu_has_feature(CPU_FTR_ARCH_207S
))
2342 kvm
->arch
.lpcr
= lpcr
;
2345 * Track that we now have a HV mode VM active. This blocks secondary
2346 * CPU threads from coming online.
2348 kvm_hv_vm_activated();
2353 static void kvmppc_free_vcores(struct kvm
*kvm
)
2357 for (i
= 0; i
< KVM_MAX_VCORES
; ++i
) {
2358 if (kvm
->arch
.vcores
[i
] && kvm
->arch
.vcores
[i
]->mpp_buffer
) {
2359 struct kvmppc_vcore
*vc
= kvm
->arch
.vcores
[i
];
2360 free_pages((unsigned long)vc
->mpp_buffer
,
2363 kfree(kvm
->arch
.vcores
[i
]);
2365 kvm
->arch
.online_vcores
= 0;
2368 static void kvmppc_core_destroy_vm_hv(struct kvm
*kvm
)
2370 kvm_hv_vm_deactivated();
2372 kvmppc_free_vcores(kvm
);
2374 kvmppc_free_hpt(kvm
);
2377 /* We don't need to emulate any privileged instructions or dcbz */
2378 static int kvmppc_core_emulate_op_hv(struct kvm_run
*run
, struct kvm_vcpu
*vcpu
,
2379 unsigned int inst
, int *advance
)
2381 return EMULATE_FAIL
;
2384 static int kvmppc_core_emulate_mtspr_hv(struct kvm_vcpu
*vcpu
, int sprn
,
2387 return EMULATE_FAIL
;
2390 static int kvmppc_core_emulate_mfspr_hv(struct kvm_vcpu
*vcpu
, int sprn
,
2393 return EMULATE_FAIL
;
2396 static int kvmppc_core_check_processor_compat_hv(void)
2398 if (!cpu_has_feature(CPU_FTR_HVMODE
) ||
2399 !cpu_has_feature(CPU_FTR_ARCH_206
))
2404 static long kvm_arch_vm_ioctl_hv(struct file
*filp
,
2405 unsigned int ioctl
, unsigned long arg
)
2407 struct kvm
*kvm __maybe_unused
= filp
->private_data
;
2408 void __user
*argp
= (void __user
*)arg
;
2413 case KVM_PPC_ALLOCATE_HTAB
: {
2417 if (get_user(htab_order
, (u32 __user
*)argp
))
2419 r
= kvmppc_alloc_reset_hpt(kvm
, &htab_order
);
2423 if (put_user(htab_order
, (u32 __user
*)argp
))
2429 case KVM_PPC_GET_HTAB_FD
: {
2430 struct kvm_get_htab_fd ghf
;
2433 if (copy_from_user(&ghf
, argp
, sizeof(ghf
)))
2435 r
= kvm_vm_ioctl_get_htab_fd(kvm
, &ghf
);
2447 * List of hcall numbers to enable by default.
2448 * For compatibility with old userspace, we enable by default
2449 * all hcalls that were implemented before the hcall-enabling
2450 * facility was added. Note this list should not include H_RTAS.
2452 static unsigned int default_hcall_list
[] = {
2466 #ifdef CONFIG_KVM_XICS
2477 static void init_default_hcalls(void)
2482 for (i
= 0; default_hcall_list
[i
]; ++i
) {
2483 hcall
= default_hcall_list
[i
];
2484 WARN_ON(!kvmppc_hcall_impl_hv(hcall
));
2485 __set_bit(hcall
/ 4, default_enabled_hcalls
);
2489 static struct kvmppc_ops kvm_ops_hv
= {
2490 .get_sregs
= kvm_arch_vcpu_ioctl_get_sregs_hv
,
2491 .set_sregs
= kvm_arch_vcpu_ioctl_set_sregs_hv
,
2492 .get_one_reg
= kvmppc_get_one_reg_hv
,
2493 .set_one_reg
= kvmppc_set_one_reg_hv
,
2494 .vcpu_load
= kvmppc_core_vcpu_load_hv
,
2495 .vcpu_put
= kvmppc_core_vcpu_put_hv
,
2496 .set_msr
= kvmppc_set_msr_hv
,
2497 .vcpu_run
= kvmppc_vcpu_run_hv
,
2498 .vcpu_create
= kvmppc_core_vcpu_create_hv
,
2499 .vcpu_free
= kvmppc_core_vcpu_free_hv
,
2500 .check_requests
= kvmppc_core_check_requests_hv
,
2501 .get_dirty_log
= kvm_vm_ioctl_get_dirty_log_hv
,
2502 .flush_memslot
= kvmppc_core_flush_memslot_hv
,
2503 .prepare_memory_region
= kvmppc_core_prepare_memory_region_hv
,
2504 .commit_memory_region
= kvmppc_core_commit_memory_region_hv
,
2505 .unmap_hva
= kvm_unmap_hva_hv
,
2506 .unmap_hva_range
= kvm_unmap_hva_range_hv
,
2507 .age_hva
= kvm_age_hva_hv
,
2508 .test_age_hva
= kvm_test_age_hva_hv
,
2509 .set_spte_hva
= kvm_set_spte_hva_hv
,
2510 .mmu_destroy
= kvmppc_mmu_destroy_hv
,
2511 .free_memslot
= kvmppc_core_free_memslot_hv
,
2512 .create_memslot
= kvmppc_core_create_memslot_hv
,
2513 .init_vm
= kvmppc_core_init_vm_hv
,
2514 .destroy_vm
= kvmppc_core_destroy_vm_hv
,
2515 .get_smmu_info
= kvm_vm_ioctl_get_smmu_info_hv
,
2516 .emulate_op
= kvmppc_core_emulate_op_hv
,
2517 .emulate_mtspr
= kvmppc_core_emulate_mtspr_hv
,
2518 .emulate_mfspr
= kvmppc_core_emulate_mfspr_hv
,
2519 .fast_vcpu_kick
= kvmppc_fast_vcpu_kick_hv
,
2520 .arch_vm_ioctl
= kvm_arch_vm_ioctl_hv
,
2521 .hcall_implemented
= kvmppc_hcall_impl_hv
,
2524 static int kvmppc_book3s_init_hv(void)
2528 * FIXME!! Do we need to check on all cpus ?
2530 r
= kvmppc_core_check_processor_compat_hv();
2534 kvm_ops_hv
.owner
= THIS_MODULE
;
2535 kvmppc_hv_ops
= &kvm_ops_hv
;
2537 init_default_hcalls();
2539 r
= kvmppc_mmu_hv_init();
2543 static void kvmppc_book3s_exit_hv(void)
2545 kvmppc_hv_ops
= NULL
;
2548 module_init(kvmppc_book3s_init_hv
);
2549 module_exit(kvmppc_book3s_exit_hv
);
2550 MODULE_LICENSE("GPL");
2551 MODULE_ALIAS_MISCDEV(KVM_MINOR
);
2552 MODULE_ALIAS("devname:kvm");