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 <linux/uaccess.h>
44 #include <asm/kvm_ppc.h>
45 #include <asm/kvm_book3s.h>
46 #include <asm/mmu_context.h>
47 #include <asm/lppaca.h>
48 #include <asm/processor.h>
49 #include <asm/cputhreads.h>
51 #include <asm/hvcall.h>
52 #include <asm/switch_to.h>
54 #include <asm/dbell.h>
56 #include <asm/pnv-pci.h>
60 #include <linux/gfp.h>
61 #include <linux/vmalloc.h>
62 #include <linux/highmem.h>
63 #include <linux/hugetlb.h>
64 #include <linux/kvm_irqfd.h>
65 #include <linux/irqbypass.h>
66 #include <linux/module.h>
67 #include <linux/compiler.h>
72 #define CREATE_TRACE_POINTS
75 /* #define EXIT_DEBUG */
76 /* #define EXIT_DEBUG_SIMPLE */
77 /* #define EXIT_DEBUG_INT */
79 /* Used to indicate that a guest page fault needs to be handled */
80 #define RESUME_PAGE_FAULT (RESUME_GUEST | RESUME_FLAG_ARCH1)
81 /* Used to indicate that a guest passthrough interrupt needs to be handled */
82 #define RESUME_PASSTHROUGH (RESUME_GUEST | RESUME_FLAG_ARCH2)
84 /* Used as a "null" value for timebase values */
85 #define TB_NIL (~(u64)0)
87 static DECLARE_BITMAP(default_enabled_hcalls
, MAX_HCALL_OPCODE
/4 + 1);
89 static int dynamic_mt_modes
= 6;
90 module_param(dynamic_mt_modes
, int, S_IRUGO
| S_IWUSR
);
91 MODULE_PARM_DESC(dynamic_mt_modes
, "Set of allowed dynamic micro-threading modes: 0 (= none), 2, 4, or 6 (= 2 or 4)");
92 static int target_smt_mode
;
93 module_param(target_smt_mode
, int, S_IRUGO
| S_IWUSR
);
94 MODULE_PARM_DESC(target_smt_mode
, "Target threads per core (0 = max)");
96 #ifdef CONFIG_KVM_XICS
97 static struct kernel_param_ops module_param_ops
= {
102 module_param_cb(kvm_irq_bypass
, &module_param_ops
, &kvm_irq_bypass
,
104 MODULE_PARM_DESC(kvm_irq_bypass
, "Bypass passthrough interrupt optimization");
106 module_param_cb(h_ipi_redirect
, &module_param_ops
, &h_ipi_redirect
,
108 MODULE_PARM_DESC(h_ipi_redirect
, "Redirect H_IPI wakeup to a free host core");
111 static void kvmppc_end_cede(struct kvm_vcpu
*vcpu
);
112 static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu
*vcpu
);
114 static inline struct kvm_vcpu
*next_runnable_thread(struct kvmppc_vcore
*vc
,
118 struct kvm_vcpu
*vcpu
;
120 while (++i
< MAX_SMT_THREADS
) {
121 vcpu
= READ_ONCE(vc
->runnable_threads
[i
]);
130 /* Used to traverse the list of runnable threads for a given vcore */
131 #define for_each_runnable_thread(i, vcpu, vc) \
132 for (i = -1; (vcpu = next_runnable_thread(vc, &i)); )
134 static bool kvmppc_ipi_thread(int cpu
)
136 unsigned long msg
= PPC_DBELL_TYPE(PPC_DBELL_SERVER
);
138 /* On POWER9 we can use msgsnd to IPI any cpu */
139 if (cpu_has_feature(CPU_FTR_ARCH_300
)) {
140 msg
|= get_hard_smp_processor_id(cpu
);
142 __asm__
__volatile__ (PPC_MSGSND(%0) : : "r" (msg
));
146 /* On POWER8 for IPIs to threads in the same core, use msgsnd */
147 if (cpu_has_feature(CPU_FTR_ARCH_207S
)) {
149 if (cpu_first_thread_sibling(cpu
) ==
150 cpu_first_thread_sibling(smp_processor_id())) {
151 msg
|= cpu_thread_in_core(cpu
);
153 __asm__
__volatile__ (PPC_MSGSND(%0) : : "r" (msg
));
160 #if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP)
161 if (cpu
>= 0 && cpu
< nr_cpu_ids
) {
162 if (paca
[cpu
].kvm_hstate
.xics_phys
) {
166 opal_int_set_mfrr(get_hard_smp_processor_id(cpu
), IPI_PRIORITY
);
174 static void kvmppc_fast_vcpu_kick_hv(struct kvm_vcpu
*vcpu
)
177 struct swait_queue_head
*wqp
;
179 wqp
= kvm_arch_vcpu_wq(vcpu
);
180 if (swait_active(wqp
)) {
182 ++vcpu
->stat
.halt_wakeup
;
185 if (kvmppc_ipi_thread(vcpu
->arch
.thread_cpu
))
188 /* CPU points to the first thread of the core */
190 if (cpu
>= 0 && cpu
< nr_cpu_ids
&& cpu_online(cpu
))
191 smp_send_reschedule(cpu
);
195 * We use the vcpu_load/put functions to measure stolen time.
196 * Stolen time is counted as time when either the vcpu is able to
197 * run as part of a virtual core, but the task running the vcore
198 * is preempted or sleeping, or when the vcpu needs something done
199 * in the kernel by the task running the vcpu, but that task is
200 * preempted or sleeping. Those two things have to be counted
201 * separately, since one of the vcpu tasks will take on the job
202 * of running the core, and the other vcpu tasks in the vcore will
203 * sleep waiting for it to do that, but that sleep shouldn't count
206 * Hence we accumulate stolen time when the vcpu can run as part of
207 * a vcore using vc->stolen_tb, and the stolen time when the vcpu
208 * needs its task to do other things in the kernel (for example,
209 * service a page fault) in busy_stolen. We don't accumulate
210 * stolen time for a vcore when it is inactive, or for a vcpu
211 * when it is in state RUNNING or NOTREADY. NOTREADY is a bit of
212 * a misnomer; it means that the vcpu task is not executing in
213 * the KVM_VCPU_RUN ioctl, i.e. it is in userspace or elsewhere in
214 * the kernel. We don't have any way of dividing up that time
215 * between time that the vcpu is genuinely stopped, time that
216 * the task is actively working on behalf of the vcpu, and time
217 * that the task is preempted, so we don't count any of it as
220 * Updates to busy_stolen are protected by arch.tbacct_lock;
221 * updates to vc->stolen_tb are protected by the vcore->stoltb_lock
222 * lock. The stolen times are measured in units of timebase ticks.
223 * (Note that the != TB_NIL checks below are purely defensive;
224 * they should never fail.)
227 static void kvmppc_core_start_stolen(struct kvmppc_vcore
*vc
)
231 spin_lock_irqsave(&vc
->stoltb_lock
, flags
);
232 vc
->preempt_tb
= mftb();
233 spin_unlock_irqrestore(&vc
->stoltb_lock
, flags
);
236 static void kvmppc_core_end_stolen(struct kvmppc_vcore
*vc
)
240 spin_lock_irqsave(&vc
->stoltb_lock
, flags
);
241 if (vc
->preempt_tb
!= TB_NIL
) {
242 vc
->stolen_tb
+= mftb() - vc
->preempt_tb
;
243 vc
->preempt_tb
= TB_NIL
;
245 spin_unlock_irqrestore(&vc
->stoltb_lock
, flags
);
248 static void kvmppc_core_vcpu_load_hv(struct kvm_vcpu
*vcpu
, int cpu
)
250 struct kvmppc_vcore
*vc
= vcpu
->arch
.vcore
;
254 * We can test vc->runner without taking the vcore lock,
255 * because only this task ever sets vc->runner to this
256 * vcpu, and once it is set to this vcpu, only this task
257 * ever sets it to NULL.
259 if (vc
->runner
== vcpu
&& vc
->vcore_state
>= VCORE_SLEEPING
)
260 kvmppc_core_end_stolen(vc
);
262 spin_lock_irqsave(&vcpu
->arch
.tbacct_lock
, flags
);
263 if (vcpu
->arch
.state
== KVMPPC_VCPU_BUSY_IN_HOST
&&
264 vcpu
->arch
.busy_preempt
!= TB_NIL
) {
265 vcpu
->arch
.busy_stolen
+= mftb() - vcpu
->arch
.busy_preempt
;
266 vcpu
->arch
.busy_preempt
= TB_NIL
;
268 spin_unlock_irqrestore(&vcpu
->arch
.tbacct_lock
, flags
);
271 static void kvmppc_core_vcpu_put_hv(struct kvm_vcpu
*vcpu
)
273 struct kvmppc_vcore
*vc
= vcpu
->arch
.vcore
;
276 if (vc
->runner
== vcpu
&& vc
->vcore_state
>= VCORE_SLEEPING
)
277 kvmppc_core_start_stolen(vc
);
279 spin_lock_irqsave(&vcpu
->arch
.tbacct_lock
, flags
);
280 if (vcpu
->arch
.state
== KVMPPC_VCPU_BUSY_IN_HOST
)
281 vcpu
->arch
.busy_preempt
= mftb();
282 spin_unlock_irqrestore(&vcpu
->arch
.tbacct_lock
, flags
);
285 static void kvmppc_set_msr_hv(struct kvm_vcpu
*vcpu
, u64 msr
)
288 * Check for illegal transactional state bit combination
289 * and if we find it, force the TS field to a safe state.
291 if ((msr
& MSR_TS_MASK
) == MSR_TS_MASK
)
293 vcpu
->arch
.shregs
.msr
= msr
;
294 kvmppc_end_cede(vcpu
);
297 static void kvmppc_set_pvr_hv(struct kvm_vcpu
*vcpu
, u32 pvr
)
299 vcpu
->arch
.pvr
= pvr
;
302 /* Dummy value used in computing PCR value below */
303 #define PCR_ARCH_300 (PCR_ARCH_207 << 1)
305 static int kvmppc_set_arch_compat(struct kvm_vcpu
*vcpu
, u32 arch_compat
)
307 unsigned long host_pcr_bit
= 0, guest_pcr_bit
= 0;
308 struct kvmppc_vcore
*vc
= vcpu
->arch
.vcore
;
310 /* We can (emulate) our own architecture version and anything older */
311 if (cpu_has_feature(CPU_FTR_ARCH_300
))
312 host_pcr_bit
= PCR_ARCH_300
;
313 else if (cpu_has_feature(CPU_FTR_ARCH_207S
))
314 host_pcr_bit
= PCR_ARCH_207
;
315 else if (cpu_has_feature(CPU_FTR_ARCH_206
))
316 host_pcr_bit
= PCR_ARCH_206
;
318 host_pcr_bit
= PCR_ARCH_205
;
320 /* Determine lowest PCR bit needed to run guest in given PVR level */
321 guest_pcr_bit
= host_pcr_bit
;
323 switch (arch_compat
) {
325 guest_pcr_bit
= PCR_ARCH_205
;
329 guest_pcr_bit
= PCR_ARCH_206
;
332 guest_pcr_bit
= PCR_ARCH_207
;
335 guest_pcr_bit
= PCR_ARCH_300
;
342 /* Check requested PCR bits don't exceed our capabilities */
343 if (guest_pcr_bit
> host_pcr_bit
)
346 spin_lock(&vc
->lock
);
347 vc
->arch_compat
= arch_compat
;
348 /* Set all PCR bits for which guest_pcr_bit <= bit < host_pcr_bit */
349 vc
->pcr
= host_pcr_bit
- guest_pcr_bit
;
350 spin_unlock(&vc
->lock
);
355 static void kvmppc_dump_regs(struct kvm_vcpu
*vcpu
)
359 pr_err("vcpu %p (%d):\n", vcpu
, vcpu
->vcpu_id
);
360 pr_err("pc = %.16lx msr = %.16llx trap = %x\n",
361 vcpu
->arch
.pc
, vcpu
->arch
.shregs
.msr
, vcpu
->arch
.trap
);
362 for (r
= 0; r
< 16; ++r
)
363 pr_err("r%2d = %.16lx r%d = %.16lx\n",
364 r
, kvmppc_get_gpr(vcpu
, r
),
365 r
+16, kvmppc_get_gpr(vcpu
, r
+16));
366 pr_err("ctr = %.16lx lr = %.16lx\n",
367 vcpu
->arch
.ctr
, vcpu
->arch
.lr
);
368 pr_err("srr0 = %.16llx srr1 = %.16llx\n",
369 vcpu
->arch
.shregs
.srr0
, vcpu
->arch
.shregs
.srr1
);
370 pr_err("sprg0 = %.16llx sprg1 = %.16llx\n",
371 vcpu
->arch
.shregs
.sprg0
, vcpu
->arch
.shregs
.sprg1
);
372 pr_err("sprg2 = %.16llx sprg3 = %.16llx\n",
373 vcpu
->arch
.shregs
.sprg2
, vcpu
->arch
.shregs
.sprg3
);
374 pr_err("cr = %.8x xer = %.16lx dsisr = %.8x\n",
375 vcpu
->arch
.cr
, vcpu
->arch
.xer
, vcpu
->arch
.shregs
.dsisr
);
376 pr_err("dar = %.16llx\n", vcpu
->arch
.shregs
.dar
);
377 pr_err("fault dar = %.16lx dsisr = %.8x\n",
378 vcpu
->arch
.fault_dar
, vcpu
->arch
.fault_dsisr
);
379 pr_err("SLB (%d entries):\n", vcpu
->arch
.slb_max
);
380 for (r
= 0; r
< vcpu
->arch
.slb_max
; ++r
)
381 pr_err(" ESID = %.16llx VSID = %.16llx\n",
382 vcpu
->arch
.slb
[r
].orige
, vcpu
->arch
.slb
[r
].origv
);
383 pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n",
384 vcpu
->arch
.vcore
->lpcr
, vcpu
->kvm
->arch
.sdr1
,
385 vcpu
->arch
.last_inst
);
388 static struct kvm_vcpu
*kvmppc_find_vcpu(struct kvm
*kvm
, int id
)
390 struct kvm_vcpu
*ret
;
392 mutex_lock(&kvm
->lock
);
393 ret
= kvm_get_vcpu_by_id(kvm
, id
);
394 mutex_unlock(&kvm
->lock
);
398 static void init_vpa(struct kvm_vcpu
*vcpu
, struct lppaca
*vpa
)
400 vpa
->__old_status
|= LPPACA_OLD_SHARED_PROC
;
401 vpa
->yield_count
= cpu_to_be32(1);
404 static int set_vpa(struct kvm_vcpu
*vcpu
, struct kvmppc_vpa
*v
,
405 unsigned long addr
, unsigned long len
)
407 /* check address is cacheline aligned */
408 if (addr
& (L1_CACHE_BYTES
- 1))
410 spin_lock(&vcpu
->arch
.vpa_update_lock
);
411 if (v
->next_gpa
!= addr
|| v
->len
!= len
) {
413 v
->len
= addr
? len
: 0;
414 v
->update_pending
= 1;
416 spin_unlock(&vcpu
->arch
.vpa_update_lock
);
420 /* Length for a per-processor buffer is passed in at offset 4 in the buffer */
429 static int vpa_is_registered(struct kvmppc_vpa
*vpap
)
431 if (vpap
->update_pending
)
432 return vpap
->next_gpa
!= 0;
433 return vpap
->pinned_addr
!= NULL
;
436 static unsigned long do_h_register_vpa(struct kvm_vcpu
*vcpu
,
438 unsigned long vcpuid
, unsigned long vpa
)
440 struct kvm
*kvm
= vcpu
->kvm
;
441 unsigned long len
, nb
;
443 struct kvm_vcpu
*tvcpu
;
446 struct kvmppc_vpa
*vpap
;
448 tvcpu
= kvmppc_find_vcpu(kvm
, vcpuid
);
452 subfunc
= (flags
>> H_VPA_FUNC_SHIFT
) & H_VPA_FUNC_MASK
;
453 if (subfunc
== H_VPA_REG_VPA
|| subfunc
== H_VPA_REG_DTL
||
454 subfunc
== H_VPA_REG_SLB
) {
455 /* Registering new area - address must be cache-line aligned */
456 if ((vpa
& (L1_CACHE_BYTES
- 1)) || !vpa
)
459 /* convert logical addr to kernel addr and read length */
460 va
= kvmppc_pin_guest_page(kvm
, vpa
, &nb
);
463 if (subfunc
== H_VPA_REG_VPA
)
464 len
= be16_to_cpu(((struct reg_vpa
*)va
)->length
.hword
);
466 len
= be32_to_cpu(((struct reg_vpa
*)va
)->length
.word
);
467 kvmppc_unpin_guest_page(kvm
, va
, vpa
, false);
470 if (len
> nb
|| len
< sizeof(struct reg_vpa
))
479 spin_lock(&tvcpu
->arch
.vpa_update_lock
);
482 case H_VPA_REG_VPA
: /* register VPA */
483 if (len
< sizeof(struct lppaca
))
485 vpap
= &tvcpu
->arch
.vpa
;
489 case H_VPA_REG_DTL
: /* register DTL */
490 if (len
< sizeof(struct dtl_entry
))
492 len
-= len
% sizeof(struct dtl_entry
);
494 /* Check that they have previously registered a VPA */
496 if (!vpa_is_registered(&tvcpu
->arch
.vpa
))
499 vpap
= &tvcpu
->arch
.dtl
;
503 case H_VPA_REG_SLB
: /* register SLB shadow buffer */
504 /* Check that they have previously registered a VPA */
506 if (!vpa_is_registered(&tvcpu
->arch
.vpa
))
509 vpap
= &tvcpu
->arch
.slb_shadow
;
513 case H_VPA_DEREG_VPA
: /* deregister VPA */
514 /* Check they don't still have a DTL or SLB buf registered */
516 if (vpa_is_registered(&tvcpu
->arch
.dtl
) ||
517 vpa_is_registered(&tvcpu
->arch
.slb_shadow
))
520 vpap
= &tvcpu
->arch
.vpa
;
524 case H_VPA_DEREG_DTL
: /* deregister DTL */
525 vpap
= &tvcpu
->arch
.dtl
;
529 case H_VPA_DEREG_SLB
: /* deregister SLB shadow buffer */
530 vpap
= &tvcpu
->arch
.slb_shadow
;
536 vpap
->next_gpa
= vpa
;
538 vpap
->update_pending
= 1;
541 spin_unlock(&tvcpu
->arch
.vpa_update_lock
);
546 static void kvmppc_update_vpa(struct kvm_vcpu
*vcpu
, struct kvmppc_vpa
*vpap
)
548 struct kvm
*kvm
= vcpu
->kvm
;
554 * We need to pin the page pointed to by vpap->next_gpa,
555 * but we can't call kvmppc_pin_guest_page under the lock
556 * as it does get_user_pages() and down_read(). So we
557 * have to drop the lock, pin the page, then get the lock
558 * again and check that a new area didn't get registered
562 gpa
= vpap
->next_gpa
;
563 spin_unlock(&vcpu
->arch
.vpa_update_lock
);
567 va
= kvmppc_pin_guest_page(kvm
, gpa
, &nb
);
568 spin_lock(&vcpu
->arch
.vpa_update_lock
);
569 if (gpa
== vpap
->next_gpa
)
571 /* sigh... unpin that one and try again */
573 kvmppc_unpin_guest_page(kvm
, va
, gpa
, false);
576 vpap
->update_pending
= 0;
577 if (va
&& nb
< vpap
->len
) {
579 * If it's now too short, it must be that userspace
580 * has changed the mappings underlying guest memory,
581 * so unregister the region.
583 kvmppc_unpin_guest_page(kvm
, va
, gpa
, false);
586 if (vpap
->pinned_addr
)
587 kvmppc_unpin_guest_page(kvm
, vpap
->pinned_addr
, vpap
->gpa
,
590 vpap
->pinned_addr
= va
;
593 vpap
->pinned_end
= va
+ vpap
->len
;
596 static void kvmppc_update_vpas(struct kvm_vcpu
*vcpu
)
598 if (!(vcpu
->arch
.vpa
.update_pending
||
599 vcpu
->arch
.slb_shadow
.update_pending
||
600 vcpu
->arch
.dtl
.update_pending
))
603 spin_lock(&vcpu
->arch
.vpa_update_lock
);
604 if (vcpu
->arch
.vpa
.update_pending
) {
605 kvmppc_update_vpa(vcpu
, &vcpu
->arch
.vpa
);
606 if (vcpu
->arch
.vpa
.pinned_addr
)
607 init_vpa(vcpu
, vcpu
->arch
.vpa
.pinned_addr
);
609 if (vcpu
->arch
.dtl
.update_pending
) {
610 kvmppc_update_vpa(vcpu
, &vcpu
->arch
.dtl
);
611 vcpu
->arch
.dtl_ptr
= vcpu
->arch
.dtl
.pinned_addr
;
612 vcpu
->arch
.dtl_index
= 0;
614 if (vcpu
->arch
.slb_shadow
.update_pending
)
615 kvmppc_update_vpa(vcpu
, &vcpu
->arch
.slb_shadow
);
616 spin_unlock(&vcpu
->arch
.vpa_update_lock
);
620 * Return the accumulated stolen time for the vcore up until `now'.
621 * The caller should hold the vcore lock.
623 static u64
vcore_stolen_time(struct kvmppc_vcore
*vc
, u64 now
)
628 spin_lock_irqsave(&vc
->stoltb_lock
, flags
);
630 if (vc
->vcore_state
!= VCORE_INACTIVE
&&
631 vc
->preempt_tb
!= TB_NIL
)
632 p
+= now
- vc
->preempt_tb
;
633 spin_unlock_irqrestore(&vc
->stoltb_lock
, flags
);
637 static void kvmppc_create_dtl_entry(struct kvm_vcpu
*vcpu
,
638 struct kvmppc_vcore
*vc
)
640 struct dtl_entry
*dt
;
642 unsigned long stolen
;
643 unsigned long core_stolen
;
646 dt
= vcpu
->arch
.dtl_ptr
;
647 vpa
= vcpu
->arch
.vpa
.pinned_addr
;
649 core_stolen
= vcore_stolen_time(vc
, now
);
650 stolen
= core_stolen
- vcpu
->arch
.stolen_logged
;
651 vcpu
->arch
.stolen_logged
= core_stolen
;
652 spin_lock_irq(&vcpu
->arch
.tbacct_lock
);
653 stolen
+= vcpu
->arch
.busy_stolen
;
654 vcpu
->arch
.busy_stolen
= 0;
655 spin_unlock_irq(&vcpu
->arch
.tbacct_lock
);
658 memset(dt
, 0, sizeof(struct dtl_entry
));
659 dt
->dispatch_reason
= 7;
660 dt
->processor_id
= cpu_to_be16(vc
->pcpu
+ vcpu
->arch
.ptid
);
661 dt
->timebase
= cpu_to_be64(now
+ vc
->tb_offset
);
662 dt
->enqueue_to_dispatch_time
= cpu_to_be32(stolen
);
663 dt
->srr0
= cpu_to_be64(kvmppc_get_pc(vcpu
));
664 dt
->srr1
= cpu_to_be64(vcpu
->arch
.shregs
.msr
);
666 if (dt
== vcpu
->arch
.dtl
.pinned_end
)
667 dt
= vcpu
->arch
.dtl
.pinned_addr
;
668 vcpu
->arch
.dtl_ptr
= dt
;
669 /* order writing *dt vs. writing vpa->dtl_idx */
671 vpa
->dtl_idx
= cpu_to_be64(++vcpu
->arch
.dtl_index
);
672 vcpu
->arch
.dtl
.dirty
= true;
675 static bool kvmppc_power8_compatible(struct kvm_vcpu
*vcpu
)
677 if (vcpu
->arch
.vcore
->arch_compat
>= PVR_ARCH_207
)
679 if ((!vcpu
->arch
.vcore
->arch_compat
) &&
680 cpu_has_feature(CPU_FTR_ARCH_207S
))
685 static int kvmppc_h_set_mode(struct kvm_vcpu
*vcpu
, unsigned long mflags
,
686 unsigned long resource
, unsigned long value1
,
687 unsigned long value2
)
690 case H_SET_MODE_RESOURCE_SET_CIABR
:
691 if (!kvmppc_power8_compatible(vcpu
))
696 return H_UNSUPPORTED_FLAG_START
;
697 /* Guests can't breakpoint the hypervisor */
698 if ((value1
& CIABR_PRIV
) == CIABR_PRIV_HYPER
)
700 vcpu
->arch
.ciabr
= value1
;
702 case H_SET_MODE_RESOURCE_SET_DAWR
:
703 if (!kvmppc_power8_compatible(vcpu
))
706 return H_UNSUPPORTED_FLAG_START
;
707 if (value2
& DABRX_HYP
)
709 vcpu
->arch
.dawr
= value1
;
710 vcpu
->arch
.dawrx
= value2
;
717 static int kvm_arch_vcpu_yield_to(struct kvm_vcpu
*target
)
719 struct kvmppc_vcore
*vcore
= target
->arch
.vcore
;
722 * We expect to have been called by the real mode handler
723 * (kvmppc_rm_h_confer()) which would have directly returned
724 * H_SUCCESS if the source vcore wasn't idle (e.g. if it may
725 * have useful work to do and should not confer) so we don't
729 spin_lock(&vcore
->lock
);
730 if (target
->arch
.state
== KVMPPC_VCPU_RUNNABLE
&&
731 vcore
->vcore_state
!= VCORE_INACTIVE
&&
733 target
= vcore
->runner
;
734 spin_unlock(&vcore
->lock
);
736 return kvm_vcpu_yield_to(target
);
739 static int kvmppc_get_yield_count(struct kvm_vcpu
*vcpu
)
742 struct lppaca
*lppaca
;
744 spin_lock(&vcpu
->arch
.vpa_update_lock
);
745 lppaca
= (struct lppaca
*)vcpu
->arch
.vpa
.pinned_addr
;
747 yield_count
= be32_to_cpu(lppaca
->yield_count
);
748 spin_unlock(&vcpu
->arch
.vpa_update_lock
);
752 int kvmppc_pseries_do_hcall(struct kvm_vcpu
*vcpu
)
754 unsigned long req
= kvmppc_get_gpr(vcpu
, 3);
755 unsigned long target
, ret
= H_SUCCESS
;
757 struct kvm_vcpu
*tvcpu
;
760 if (req
<= MAX_HCALL_OPCODE
&&
761 !test_bit(req
/4, vcpu
->kvm
->arch
.enabled_hcalls
))
768 target
= kvmppc_get_gpr(vcpu
, 4);
769 tvcpu
= kvmppc_find_vcpu(vcpu
->kvm
, target
);
774 tvcpu
->arch
.prodded
= 1;
776 if (vcpu
->arch
.ceded
) {
777 if (swait_active(&vcpu
->wq
)) {
779 vcpu
->stat
.halt_wakeup
++;
784 target
= kvmppc_get_gpr(vcpu
, 4);
787 tvcpu
= kvmppc_find_vcpu(vcpu
->kvm
, target
);
792 yield_count
= kvmppc_get_gpr(vcpu
, 5);
793 if (kvmppc_get_yield_count(tvcpu
) != yield_count
)
795 kvm_arch_vcpu_yield_to(tvcpu
);
798 ret
= do_h_register_vpa(vcpu
, kvmppc_get_gpr(vcpu
, 4),
799 kvmppc_get_gpr(vcpu
, 5),
800 kvmppc_get_gpr(vcpu
, 6));
803 if (list_empty(&vcpu
->kvm
->arch
.rtas_tokens
))
806 idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
807 rc
= kvmppc_rtas_hcall(vcpu
);
808 srcu_read_unlock(&vcpu
->kvm
->srcu
, idx
);
815 /* Send the error out to userspace via KVM_RUN */
817 case H_LOGICAL_CI_LOAD
:
818 ret
= kvmppc_h_logical_ci_load(vcpu
);
819 if (ret
== H_TOO_HARD
)
822 case H_LOGICAL_CI_STORE
:
823 ret
= kvmppc_h_logical_ci_store(vcpu
);
824 if (ret
== H_TOO_HARD
)
828 ret
= kvmppc_h_set_mode(vcpu
, kvmppc_get_gpr(vcpu
, 4),
829 kvmppc_get_gpr(vcpu
, 5),
830 kvmppc_get_gpr(vcpu
, 6),
831 kvmppc_get_gpr(vcpu
, 7));
832 if (ret
== H_TOO_HARD
)
841 if (kvmppc_xics_enabled(vcpu
)) {
842 ret
= kvmppc_xics_hcall(vcpu
, req
);
847 ret
= kvmppc_h_put_tce(vcpu
, kvmppc_get_gpr(vcpu
, 4),
848 kvmppc_get_gpr(vcpu
, 5),
849 kvmppc_get_gpr(vcpu
, 6));
850 if (ret
== H_TOO_HARD
)
853 case H_PUT_TCE_INDIRECT
:
854 ret
= kvmppc_h_put_tce_indirect(vcpu
, kvmppc_get_gpr(vcpu
, 4),
855 kvmppc_get_gpr(vcpu
, 5),
856 kvmppc_get_gpr(vcpu
, 6),
857 kvmppc_get_gpr(vcpu
, 7));
858 if (ret
== H_TOO_HARD
)
862 ret
= kvmppc_h_stuff_tce(vcpu
, kvmppc_get_gpr(vcpu
, 4),
863 kvmppc_get_gpr(vcpu
, 5),
864 kvmppc_get_gpr(vcpu
, 6),
865 kvmppc_get_gpr(vcpu
, 7));
866 if (ret
== H_TOO_HARD
)
872 kvmppc_set_gpr(vcpu
, 3, ret
);
873 vcpu
->arch
.hcall_needed
= 0;
877 static int kvmppc_hcall_impl_hv(unsigned long cmd
)
885 case H_LOGICAL_CI_LOAD
:
886 case H_LOGICAL_CI_STORE
:
887 #ifdef CONFIG_KVM_XICS
898 /* See if it's in the real-mode table */
899 return kvmppc_hcall_impl_hv_realmode(cmd
);
902 static int kvmppc_emulate_debug_inst(struct kvm_run
*run
,
903 struct kvm_vcpu
*vcpu
)
907 if (kvmppc_get_last_inst(vcpu
, INST_GENERIC
, &last_inst
) !=
910 * Fetch failed, so return to guest and
911 * try executing it again.
916 if (last_inst
== KVMPPC_INST_SW_BREAKPOINT
) {
917 run
->exit_reason
= KVM_EXIT_DEBUG
;
918 run
->debug
.arch
.address
= kvmppc_get_pc(vcpu
);
921 kvmppc_core_queue_program(vcpu
, SRR1_PROGILL
);
926 static int kvmppc_handle_exit_hv(struct kvm_run
*run
, struct kvm_vcpu
*vcpu
,
927 struct task_struct
*tsk
)
931 vcpu
->stat
.sum_exits
++;
934 * This can happen if an interrupt occurs in the last stages
935 * of guest entry or the first stages of guest exit (i.e. after
936 * setting paca->kvm_hstate.in_guest to KVM_GUEST_MODE_GUEST_HV
937 * and before setting it to KVM_GUEST_MODE_HOST_HV).
938 * That can happen due to a bug, or due to a machine check
939 * occurring at just the wrong time.
941 if (vcpu
->arch
.shregs
.msr
& MSR_HV
) {
942 printk(KERN_EMERG
"KVM trap in HV mode!\n");
943 printk(KERN_EMERG
"trap=0x%x | pc=0x%lx | msr=0x%llx\n",
944 vcpu
->arch
.trap
, kvmppc_get_pc(vcpu
),
945 vcpu
->arch
.shregs
.msr
);
946 kvmppc_dump_regs(vcpu
);
947 run
->exit_reason
= KVM_EXIT_INTERNAL_ERROR
;
948 run
->hw
.hardware_exit_reason
= vcpu
->arch
.trap
;
951 run
->exit_reason
= KVM_EXIT_UNKNOWN
;
952 run
->ready_for_interrupt_injection
= 1;
953 switch (vcpu
->arch
.trap
) {
954 /* We're good on these - the host merely wanted to get our attention */
955 case BOOK3S_INTERRUPT_HV_DECREMENTER
:
956 vcpu
->stat
.dec_exits
++;
959 case BOOK3S_INTERRUPT_EXTERNAL
:
960 case BOOK3S_INTERRUPT_H_DOORBELL
:
961 case BOOK3S_INTERRUPT_H_VIRT
:
962 vcpu
->stat
.ext_intr_exits
++;
965 /* HMI is hypervisor interrupt and host has handled it. Resume guest.*/
966 case BOOK3S_INTERRUPT_HMI
:
967 case BOOK3S_INTERRUPT_PERFMON
:
970 case BOOK3S_INTERRUPT_MACHINE_CHECK
:
972 * Deliver a machine check interrupt to the guest.
973 * We have to do this, even if the host has handled the
974 * machine check, because machine checks use SRR0/1 and
975 * the interrupt might have trashed guest state in them.
977 kvmppc_book3s_queue_irqprio(vcpu
,
978 BOOK3S_INTERRUPT_MACHINE_CHECK
);
981 case BOOK3S_INTERRUPT_PROGRAM
:
985 * Normally program interrupts are delivered directly
986 * to the guest by the hardware, but we can get here
987 * as a result of a hypervisor emulation interrupt
988 * (e40) getting turned into a 700 by BML RTAS.
990 flags
= vcpu
->arch
.shregs
.msr
& 0x1f0000ull
;
991 kvmppc_core_queue_program(vcpu
, flags
);
995 case BOOK3S_INTERRUPT_SYSCALL
:
997 /* hcall - punt to userspace */
1000 /* hypercall with MSR_PR has already been handled in rmode,
1001 * and never reaches here.
1004 run
->papr_hcall
.nr
= kvmppc_get_gpr(vcpu
, 3);
1005 for (i
= 0; i
< 9; ++i
)
1006 run
->papr_hcall
.args
[i
] = kvmppc_get_gpr(vcpu
, 4 + i
);
1007 run
->exit_reason
= KVM_EXIT_PAPR_HCALL
;
1008 vcpu
->arch
.hcall_needed
= 1;
1013 * We get these next two if the guest accesses a page which it thinks
1014 * it has mapped but which is not actually present, either because
1015 * it is for an emulated I/O device or because the corresonding
1016 * host page has been paged out. Any other HDSI/HISI interrupts
1017 * have been handled already.
1019 case BOOK3S_INTERRUPT_H_DATA_STORAGE
:
1020 r
= RESUME_PAGE_FAULT
;
1022 case BOOK3S_INTERRUPT_H_INST_STORAGE
:
1023 vcpu
->arch
.fault_dar
= kvmppc_get_pc(vcpu
);
1024 vcpu
->arch
.fault_dsisr
= 0;
1025 r
= RESUME_PAGE_FAULT
;
1028 * This occurs if the guest executes an illegal instruction.
1029 * If the guest debug is disabled, generate a program interrupt
1030 * to the guest. If guest debug is enabled, we need to check
1031 * whether the instruction is a software breakpoint instruction.
1032 * Accordingly return to Guest or Host.
1034 case BOOK3S_INTERRUPT_H_EMUL_ASSIST
:
1035 if (vcpu
->arch
.emul_inst
!= KVM_INST_FETCH_FAILED
)
1036 vcpu
->arch
.last_inst
= kvmppc_need_byteswap(vcpu
) ?
1037 swab32(vcpu
->arch
.emul_inst
) :
1038 vcpu
->arch
.emul_inst
;
1039 if (vcpu
->guest_debug
& KVM_GUESTDBG_USE_SW_BP
) {
1040 r
= kvmppc_emulate_debug_inst(run
, vcpu
);
1042 kvmppc_core_queue_program(vcpu
, SRR1_PROGILL
);
1047 * This occurs if the guest (kernel or userspace), does something that
1048 * is prohibited by HFSCR. We just generate a program interrupt to
1051 case BOOK3S_INTERRUPT_H_FAC_UNAVAIL
:
1052 kvmppc_core_queue_program(vcpu
, SRR1_PROGILL
);
1055 case BOOK3S_INTERRUPT_HV_RM_HARD
:
1056 r
= RESUME_PASSTHROUGH
;
1059 kvmppc_dump_regs(vcpu
);
1060 printk(KERN_EMERG
"trap=0x%x | pc=0x%lx | msr=0x%llx\n",
1061 vcpu
->arch
.trap
, kvmppc_get_pc(vcpu
),
1062 vcpu
->arch
.shregs
.msr
);
1063 run
->hw
.hardware_exit_reason
= vcpu
->arch
.trap
;
1071 static int kvm_arch_vcpu_ioctl_get_sregs_hv(struct kvm_vcpu
*vcpu
,
1072 struct kvm_sregs
*sregs
)
1076 memset(sregs
, 0, sizeof(struct kvm_sregs
));
1077 sregs
->pvr
= vcpu
->arch
.pvr
;
1078 for (i
= 0; i
< vcpu
->arch
.slb_max
; i
++) {
1079 sregs
->u
.s
.ppc64
.slb
[i
].slbe
= vcpu
->arch
.slb
[i
].orige
;
1080 sregs
->u
.s
.ppc64
.slb
[i
].slbv
= vcpu
->arch
.slb
[i
].origv
;
1086 static int kvm_arch_vcpu_ioctl_set_sregs_hv(struct kvm_vcpu
*vcpu
,
1087 struct kvm_sregs
*sregs
)
1091 /* Only accept the same PVR as the host's, since we can't spoof it */
1092 if (sregs
->pvr
!= vcpu
->arch
.pvr
)
1096 for (i
= 0; i
< vcpu
->arch
.slb_nr
; i
++) {
1097 if (sregs
->u
.s
.ppc64
.slb
[i
].slbe
& SLB_ESID_V
) {
1098 vcpu
->arch
.slb
[j
].orige
= sregs
->u
.s
.ppc64
.slb
[i
].slbe
;
1099 vcpu
->arch
.slb
[j
].origv
= sregs
->u
.s
.ppc64
.slb
[i
].slbv
;
1103 vcpu
->arch
.slb_max
= j
;
1108 static void kvmppc_set_lpcr(struct kvm_vcpu
*vcpu
, u64 new_lpcr
,
1109 bool preserve_top32
)
1111 struct kvm
*kvm
= vcpu
->kvm
;
1112 struct kvmppc_vcore
*vc
= vcpu
->arch
.vcore
;
1115 mutex_lock(&kvm
->lock
);
1116 spin_lock(&vc
->lock
);
1118 * If ILE (interrupt little-endian) has changed, update the
1119 * MSR_LE bit in the intr_msr for each vcpu in this vcore.
1121 if ((new_lpcr
& LPCR_ILE
) != (vc
->lpcr
& LPCR_ILE
)) {
1122 struct kvm_vcpu
*vcpu
;
1125 kvm_for_each_vcpu(i
, vcpu
, kvm
) {
1126 if (vcpu
->arch
.vcore
!= vc
)
1128 if (new_lpcr
& LPCR_ILE
)
1129 vcpu
->arch
.intr_msr
|= MSR_LE
;
1131 vcpu
->arch
.intr_msr
&= ~MSR_LE
;
1136 * Userspace can only modify DPFD (default prefetch depth),
1137 * ILE (interrupt little-endian) and TC (translation control).
1138 * On POWER8 userspace can also modify AIL (alt. interrupt loc.)
1140 mask
= LPCR_DPFD
| LPCR_ILE
| LPCR_TC
;
1141 if (cpu_has_feature(CPU_FTR_ARCH_207S
))
1144 /* Broken 32-bit version of LPCR must not clear top bits */
1147 vc
->lpcr
= (vc
->lpcr
& ~mask
) | (new_lpcr
& mask
);
1148 spin_unlock(&vc
->lock
);
1149 mutex_unlock(&kvm
->lock
);
1152 static int kvmppc_get_one_reg_hv(struct kvm_vcpu
*vcpu
, u64 id
,
1153 union kvmppc_one_reg
*val
)
1159 case KVM_REG_PPC_DEBUG_INST
:
1160 *val
= get_reg_val(id
, KVMPPC_INST_SW_BREAKPOINT
);
1162 case KVM_REG_PPC_HIOR
:
1163 *val
= get_reg_val(id
, 0);
1165 case KVM_REG_PPC_DABR
:
1166 *val
= get_reg_val(id
, vcpu
->arch
.dabr
);
1168 case KVM_REG_PPC_DABRX
:
1169 *val
= get_reg_val(id
, vcpu
->arch
.dabrx
);
1171 case KVM_REG_PPC_DSCR
:
1172 *val
= get_reg_val(id
, vcpu
->arch
.dscr
);
1174 case KVM_REG_PPC_PURR
:
1175 *val
= get_reg_val(id
, vcpu
->arch
.purr
);
1177 case KVM_REG_PPC_SPURR
:
1178 *val
= get_reg_val(id
, vcpu
->arch
.spurr
);
1180 case KVM_REG_PPC_AMR
:
1181 *val
= get_reg_val(id
, vcpu
->arch
.amr
);
1183 case KVM_REG_PPC_UAMOR
:
1184 *val
= get_reg_val(id
, vcpu
->arch
.uamor
);
1186 case KVM_REG_PPC_MMCR0
... KVM_REG_PPC_MMCRS
:
1187 i
= id
- KVM_REG_PPC_MMCR0
;
1188 *val
= get_reg_val(id
, vcpu
->arch
.mmcr
[i
]);
1190 case KVM_REG_PPC_PMC1
... KVM_REG_PPC_PMC8
:
1191 i
= id
- KVM_REG_PPC_PMC1
;
1192 *val
= get_reg_val(id
, vcpu
->arch
.pmc
[i
]);
1194 case KVM_REG_PPC_SPMC1
... KVM_REG_PPC_SPMC2
:
1195 i
= id
- KVM_REG_PPC_SPMC1
;
1196 *val
= get_reg_val(id
, vcpu
->arch
.spmc
[i
]);
1198 case KVM_REG_PPC_SIAR
:
1199 *val
= get_reg_val(id
, vcpu
->arch
.siar
);
1201 case KVM_REG_PPC_SDAR
:
1202 *val
= get_reg_val(id
, vcpu
->arch
.sdar
);
1204 case KVM_REG_PPC_SIER
:
1205 *val
= get_reg_val(id
, vcpu
->arch
.sier
);
1207 case KVM_REG_PPC_IAMR
:
1208 *val
= get_reg_val(id
, vcpu
->arch
.iamr
);
1210 case KVM_REG_PPC_PSPB
:
1211 *val
= get_reg_val(id
, vcpu
->arch
.pspb
);
1213 case KVM_REG_PPC_DPDES
:
1214 *val
= get_reg_val(id
, vcpu
->arch
.vcore
->dpdes
);
1216 case KVM_REG_PPC_VTB
:
1217 *val
= get_reg_val(id
, vcpu
->arch
.vcore
->vtb
);
1219 case KVM_REG_PPC_DAWR
:
1220 *val
= get_reg_val(id
, vcpu
->arch
.dawr
);
1222 case KVM_REG_PPC_DAWRX
:
1223 *val
= get_reg_val(id
, vcpu
->arch
.dawrx
);
1225 case KVM_REG_PPC_CIABR
:
1226 *val
= get_reg_val(id
, vcpu
->arch
.ciabr
);
1228 case KVM_REG_PPC_CSIGR
:
1229 *val
= get_reg_val(id
, vcpu
->arch
.csigr
);
1231 case KVM_REG_PPC_TACR
:
1232 *val
= get_reg_val(id
, vcpu
->arch
.tacr
);
1234 case KVM_REG_PPC_TCSCR
:
1235 *val
= get_reg_val(id
, vcpu
->arch
.tcscr
);
1237 case KVM_REG_PPC_PID
:
1238 *val
= get_reg_val(id
, vcpu
->arch
.pid
);
1240 case KVM_REG_PPC_ACOP
:
1241 *val
= get_reg_val(id
, vcpu
->arch
.acop
);
1243 case KVM_REG_PPC_WORT
:
1244 *val
= get_reg_val(id
, vcpu
->arch
.wort
);
1246 case KVM_REG_PPC_TIDR
:
1247 *val
= get_reg_val(id
, vcpu
->arch
.tid
);
1249 case KVM_REG_PPC_PSSCR
:
1250 *val
= get_reg_val(id
, vcpu
->arch
.psscr
);
1252 case KVM_REG_PPC_VPA_ADDR
:
1253 spin_lock(&vcpu
->arch
.vpa_update_lock
);
1254 *val
= get_reg_val(id
, vcpu
->arch
.vpa
.next_gpa
);
1255 spin_unlock(&vcpu
->arch
.vpa_update_lock
);
1257 case KVM_REG_PPC_VPA_SLB
:
1258 spin_lock(&vcpu
->arch
.vpa_update_lock
);
1259 val
->vpaval
.addr
= vcpu
->arch
.slb_shadow
.next_gpa
;
1260 val
->vpaval
.length
= vcpu
->arch
.slb_shadow
.len
;
1261 spin_unlock(&vcpu
->arch
.vpa_update_lock
);
1263 case KVM_REG_PPC_VPA_DTL
:
1264 spin_lock(&vcpu
->arch
.vpa_update_lock
);
1265 val
->vpaval
.addr
= vcpu
->arch
.dtl
.next_gpa
;
1266 val
->vpaval
.length
= vcpu
->arch
.dtl
.len
;
1267 spin_unlock(&vcpu
->arch
.vpa_update_lock
);
1269 case KVM_REG_PPC_TB_OFFSET
:
1270 *val
= get_reg_val(id
, vcpu
->arch
.vcore
->tb_offset
);
1272 case KVM_REG_PPC_LPCR
:
1273 case KVM_REG_PPC_LPCR_64
:
1274 *val
= get_reg_val(id
, vcpu
->arch
.vcore
->lpcr
);
1276 case KVM_REG_PPC_PPR
:
1277 *val
= get_reg_val(id
, vcpu
->arch
.ppr
);
1279 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1280 case KVM_REG_PPC_TFHAR
:
1281 *val
= get_reg_val(id
, vcpu
->arch
.tfhar
);
1283 case KVM_REG_PPC_TFIAR
:
1284 *val
= get_reg_val(id
, vcpu
->arch
.tfiar
);
1286 case KVM_REG_PPC_TEXASR
:
1287 *val
= get_reg_val(id
, vcpu
->arch
.texasr
);
1289 case KVM_REG_PPC_TM_GPR0
... KVM_REG_PPC_TM_GPR31
:
1290 i
= id
- KVM_REG_PPC_TM_GPR0
;
1291 *val
= get_reg_val(id
, vcpu
->arch
.gpr_tm
[i
]);
1293 case KVM_REG_PPC_TM_VSR0
... KVM_REG_PPC_TM_VSR63
:
1296 i
= id
- KVM_REG_PPC_TM_VSR0
;
1298 for (j
= 0; j
< TS_FPRWIDTH
; j
++)
1299 val
->vsxval
[j
] = vcpu
->arch
.fp_tm
.fpr
[i
][j
];
1301 if (cpu_has_feature(CPU_FTR_ALTIVEC
))
1302 val
->vval
= vcpu
->arch
.vr_tm
.vr
[i
-32];
1308 case KVM_REG_PPC_TM_CR
:
1309 *val
= get_reg_val(id
, vcpu
->arch
.cr_tm
);
1311 case KVM_REG_PPC_TM_XER
:
1312 *val
= get_reg_val(id
, vcpu
->arch
.xer_tm
);
1314 case KVM_REG_PPC_TM_LR
:
1315 *val
= get_reg_val(id
, vcpu
->arch
.lr_tm
);
1317 case KVM_REG_PPC_TM_CTR
:
1318 *val
= get_reg_val(id
, vcpu
->arch
.ctr_tm
);
1320 case KVM_REG_PPC_TM_FPSCR
:
1321 *val
= get_reg_val(id
, vcpu
->arch
.fp_tm
.fpscr
);
1323 case KVM_REG_PPC_TM_AMR
:
1324 *val
= get_reg_val(id
, vcpu
->arch
.amr_tm
);
1326 case KVM_REG_PPC_TM_PPR
:
1327 *val
= get_reg_val(id
, vcpu
->arch
.ppr_tm
);
1329 case KVM_REG_PPC_TM_VRSAVE
:
1330 *val
= get_reg_val(id
, vcpu
->arch
.vrsave_tm
);
1332 case KVM_REG_PPC_TM_VSCR
:
1333 if (cpu_has_feature(CPU_FTR_ALTIVEC
))
1334 *val
= get_reg_val(id
, vcpu
->arch
.vr_tm
.vscr
.u
[3]);
1338 case KVM_REG_PPC_TM_DSCR
:
1339 *val
= get_reg_val(id
, vcpu
->arch
.dscr_tm
);
1341 case KVM_REG_PPC_TM_TAR
:
1342 *val
= get_reg_val(id
, vcpu
->arch
.tar_tm
);
1345 case KVM_REG_PPC_ARCH_COMPAT
:
1346 *val
= get_reg_val(id
, vcpu
->arch
.vcore
->arch_compat
);
1356 static int kvmppc_set_one_reg_hv(struct kvm_vcpu
*vcpu
, u64 id
,
1357 union kvmppc_one_reg
*val
)
1361 unsigned long addr
, len
;
1364 case KVM_REG_PPC_HIOR
:
1365 /* Only allow this to be set to zero */
1366 if (set_reg_val(id
, *val
))
1369 case KVM_REG_PPC_DABR
:
1370 vcpu
->arch
.dabr
= set_reg_val(id
, *val
);
1372 case KVM_REG_PPC_DABRX
:
1373 vcpu
->arch
.dabrx
= set_reg_val(id
, *val
) & ~DABRX_HYP
;
1375 case KVM_REG_PPC_DSCR
:
1376 vcpu
->arch
.dscr
= set_reg_val(id
, *val
);
1378 case KVM_REG_PPC_PURR
:
1379 vcpu
->arch
.purr
= set_reg_val(id
, *val
);
1381 case KVM_REG_PPC_SPURR
:
1382 vcpu
->arch
.spurr
= set_reg_val(id
, *val
);
1384 case KVM_REG_PPC_AMR
:
1385 vcpu
->arch
.amr
= set_reg_val(id
, *val
);
1387 case KVM_REG_PPC_UAMOR
:
1388 vcpu
->arch
.uamor
= set_reg_val(id
, *val
);
1390 case KVM_REG_PPC_MMCR0
... KVM_REG_PPC_MMCRS
:
1391 i
= id
- KVM_REG_PPC_MMCR0
;
1392 vcpu
->arch
.mmcr
[i
] = set_reg_val(id
, *val
);
1394 case KVM_REG_PPC_PMC1
... KVM_REG_PPC_PMC8
:
1395 i
= id
- KVM_REG_PPC_PMC1
;
1396 vcpu
->arch
.pmc
[i
] = set_reg_val(id
, *val
);
1398 case KVM_REG_PPC_SPMC1
... KVM_REG_PPC_SPMC2
:
1399 i
= id
- KVM_REG_PPC_SPMC1
;
1400 vcpu
->arch
.spmc
[i
] = set_reg_val(id
, *val
);
1402 case KVM_REG_PPC_SIAR
:
1403 vcpu
->arch
.siar
= set_reg_val(id
, *val
);
1405 case KVM_REG_PPC_SDAR
:
1406 vcpu
->arch
.sdar
= set_reg_val(id
, *val
);
1408 case KVM_REG_PPC_SIER
:
1409 vcpu
->arch
.sier
= set_reg_val(id
, *val
);
1411 case KVM_REG_PPC_IAMR
:
1412 vcpu
->arch
.iamr
= set_reg_val(id
, *val
);
1414 case KVM_REG_PPC_PSPB
:
1415 vcpu
->arch
.pspb
= set_reg_val(id
, *val
);
1417 case KVM_REG_PPC_DPDES
:
1418 vcpu
->arch
.vcore
->dpdes
= set_reg_val(id
, *val
);
1420 case KVM_REG_PPC_VTB
:
1421 vcpu
->arch
.vcore
->vtb
= set_reg_val(id
, *val
);
1423 case KVM_REG_PPC_DAWR
:
1424 vcpu
->arch
.dawr
= set_reg_val(id
, *val
);
1426 case KVM_REG_PPC_DAWRX
:
1427 vcpu
->arch
.dawrx
= set_reg_val(id
, *val
) & ~DAWRX_HYP
;
1429 case KVM_REG_PPC_CIABR
:
1430 vcpu
->arch
.ciabr
= set_reg_val(id
, *val
);
1431 /* Don't allow setting breakpoints in hypervisor code */
1432 if ((vcpu
->arch
.ciabr
& CIABR_PRIV
) == CIABR_PRIV_HYPER
)
1433 vcpu
->arch
.ciabr
&= ~CIABR_PRIV
; /* disable */
1435 case KVM_REG_PPC_CSIGR
:
1436 vcpu
->arch
.csigr
= set_reg_val(id
, *val
);
1438 case KVM_REG_PPC_TACR
:
1439 vcpu
->arch
.tacr
= set_reg_val(id
, *val
);
1441 case KVM_REG_PPC_TCSCR
:
1442 vcpu
->arch
.tcscr
= set_reg_val(id
, *val
);
1444 case KVM_REG_PPC_PID
:
1445 vcpu
->arch
.pid
= set_reg_val(id
, *val
);
1447 case KVM_REG_PPC_ACOP
:
1448 vcpu
->arch
.acop
= set_reg_val(id
, *val
);
1450 case KVM_REG_PPC_WORT
:
1451 vcpu
->arch
.wort
= set_reg_val(id
, *val
);
1453 case KVM_REG_PPC_TIDR
:
1454 vcpu
->arch
.tid
= set_reg_val(id
, *val
);
1456 case KVM_REG_PPC_PSSCR
:
1457 vcpu
->arch
.psscr
= set_reg_val(id
, *val
) & PSSCR_GUEST_VIS
;
1459 case KVM_REG_PPC_VPA_ADDR
:
1460 addr
= set_reg_val(id
, *val
);
1462 if (!addr
&& (vcpu
->arch
.slb_shadow
.next_gpa
||
1463 vcpu
->arch
.dtl
.next_gpa
))
1465 r
= set_vpa(vcpu
, &vcpu
->arch
.vpa
, addr
, sizeof(struct lppaca
));
1467 case KVM_REG_PPC_VPA_SLB
:
1468 addr
= val
->vpaval
.addr
;
1469 len
= val
->vpaval
.length
;
1471 if (addr
&& !vcpu
->arch
.vpa
.next_gpa
)
1473 r
= set_vpa(vcpu
, &vcpu
->arch
.slb_shadow
, addr
, len
);
1475 case KVM_REG_PPC_VPA_DTL
:
1476 addr
= val
->vpaval
.addr
;
1477 len
= val
->vpaval
.length
;
1479 if (addr
&& (len
< sizeof(struct dtl_entry
) ||
1480 !vcpu
->arch
.vpa
.next_gpa
))
1482 len
-= len
% sizeof(struct dtl_entry
);
1483 r
= set_vpa(vcpu
, &vcpu
->arch
.dtl
, addr
, len
);
1485 case KVM_REG_PPC_TB_OFFSET
:
1486 /* round up to multiple of 2^24 */
1487 vcpu
->arch
.vcore
->tb_offset
=
1488 ALIGN(set_reg_val(id
, *val
), 1UL << 24);
1490 case KVM_REG_PPC_LPCR
:
1491 kvmppc_set_lpcr(vcpu
, set_reg_val(id
, *val
), true);
1493 case KVM_REG_PPC_LPCR_64
:
1494 kvmppc_set_lpcr(vcpu
, set_reg_val(id
, *val
), false);
1496 case KVM_REG_PPC_PPR
:
1497 vcpu
->arch
.ppr
= set_reg_val(id
, *val
);
1499 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1500 case KVM_REG_PPC_TFHAR
:
1501 vcpu
->arch
.tfhar
= set_reg_val(id
, *val
);
1503 case KVM_REG_PPC_TFIAR
:
1504 vcpu
->arch
.tfiar
= set_reg_val(id
, *val
);
1506 case KVM_REG_PPC_TEXASR
:
1507 vcpu
->arch
.texasr
= set_reg_val(id
, *val
);
1509 case KVM_REG_PPC_TM_GPR0
... KVM_REG_PPC_TM_GPR31
:
1510 i
= id
- KVM_REG_PPC_TM_GPR0
;
1511 vcpu
->arch
.gpr_tm
[i
] = set_reg_val(id
, *val
);
1513 case KVM_REG_PPC_TM_VSR0
... KVM_REG_PPC_TM_VSR63
:
1516 i
= id
- KVM_REG_PPC_TM_VSR0
;
1518 for (j
= 0; j
< TS_FPRWIDTH
; j
++)
1519 vcpu
->arch
.fp_tm
.fpr
[i
][j
] = val
->vsxval
[j
];
1521 if (cpu_has_feature(CPU_FTR_ALTIVEC
))
1522 vcpu
->arch
.vr_tm
.vr
[i
-32] = val
->vval
;
1527 case KVM_REG_PPC_TM_CR
:
1528 vcpu
->arch
.cr_tm
= set_reg_val(id
, *val
);
1530 case KVM_REG_PPC_TM_XER
:
1531 vcpu
->arch
.xer_tm
= set_reg_val(id
, *val
);
1533 case KVM_REG_PPC_TM_LR
:
1534 vcpu
->arch
.lr_tm
= set_reg_val(id
, *val
);
1536 case KVM_REG_PPC_TM_CTR
:
1537 vcpu
->arch
.ctr_tm
= set_reg_val(id
, *val
);
1539 case KVM_REG_PPC_TM_FPSCR
:
1540 vcpu
->arch
.fp_tm
.fpscr
= set_reg_val(id
, *val
);
1542 case KVM_REG_PPC_TM_AMR
:
1543 vcpu
->arch
.amr_tm
= set_reg_val(id
, *val
);
1545 case KVM_REG_PPC_TM_PPR
:
1546 vcpu
->arch
.ppr_tm
= set_reg_val(id
, *val
);
1548 case KVM_REG_PPC_TM_VRSAVE
:
1549 vcpu
->arch
.vrsave_tm
= set_reg_val(id
, *val
);
1551 case KVM_REG_PPC_TM_VSCR
:
1552 if (cpu_has_feature(CPU_FTR_ALTIVEC
))
1553 vcpu
->arch
.vr
.vscr
.u
[3] = set_reg_val(id
, *val
);
1557 case KVM_REG_PPC_TM_DSCR
:
1558 vcpu
->arch
.dscr_tm
= set_reg_val(id
, *val
);
1560 case KVM_REG_PPC_TM_TAR
:
1561 vcpu
->arch
.tar_tm
= set_reg_val(id
, *val
);
1564 case KVM_REG_PPC_ARCH_COMPAT
:
1565 r
= kvmppc_set_arch_compat(vcpu
, set_reg_val(id
, *val
));
1576 * On POWER9, threads are independent and can be in different partitions.
1577 * Therefore we consider each thread to be a subcore.
1578 * There is a restriction that all threads have to be in the same
1579 * MMU mode (radix or HPT), unfortunately, but since we only support
1580 * HPT guests on a HPT host so far, that isn't an impediment yet.
1582 static int threads_per_vcore(void)
1584 if (cpu_has_feature(CPU_FTR_ARCH_300
))
1586 return threads_per_subcore
;
1589 static struct kvmppc_vcore
*kvmppc_vcore_create(struct kvm
*kvm
, int core
)
1591 struct kvmppc_vcore
*vcore
;
1593 vcore
= kzalloc(sizeof(struct kvmppc_vcore
), GFP_KERNEL
);
1598 spin_lock_init(&vcore
->lock
);
1599 spin_lock_init(&vcore
->stoltb_lock
);
1600 init_swait_queue_head(&vcore
->wq
);
1601 vcore
->preempt_tb
= TB_NIL
;
1602 vcore
->lpcr
= kvm
->arch
.lpcr
;
1603 vcore
->first_vcpuid
= core
* threads_per_vcore();
1605 INIT_LIST_HEAD(&vcore
->preempt_list
);
1610 #ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING
1611 static struct debugfs_timings_element
{
1615 {"rm_entry", offsetof(struct kvm_vcpu
, arch
.rm_entry
)},
1616 {"rm_intr", offsetof(struct kvm_vcpu
, arch
.rm_intr
)},
1617 {"rm_exit", offsetof(struct kvm_vcpu
, arch
.rm_exit
)},
1618 {"guest", offsetof(struct kvm_vcpu
, arch
.guest_time
)},
1619 {"cede", offsetof(struct kvm_vcpu
, arch
.cede_time
)},
1622 #define N_TIMINGS (sizeof(timings) / sizeof(timings[0]))
1624 struct debugfs_timings_state
{
1625 struct kvm_vcpu
*vcpu
;
1626 unsigned int buflen
;
1627 char buf
[N_TIMINGS
* 100];
1630 static int debugfs_timings_open(struct inode
*inode
, struct file
*file
)
1632 struct kvm_vcpu
*vcpu
= inode
->i_private
;
1633 struct debugfs_timings_state
*p
;
1635 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
1639 kvm_get_kvm(vcpu
->kvm
);
1641 file
->private_data
= p
;
1643 return nonseekable_open(inode
, file
);
1646 static int debugfs_timings_release(struct inode
*inode
, struct file
*file
)
1648 struct debugfs_timings_state
*p
= file
->private_data
;
1650 kvm_put_kvm(p
->vcpu
->kvm
);
1655 static ssize_t
debugfs_timings_read(struct file
*file
, char __user
*buf
,
1656 size_t len
, loff_t
*ppos
)
1658 struct debugfs_timings_state
*p
= file
->private_data
;
1659 struct kvm_vcpu
*vcpu
= p
->vcpu
;
1661 struct kvmhv_tb_accumulator tb
;
1670 buf_end
= s
+ sizeof(p
->buf
);
1671 for (i
= 0; i
< N_TIMINGS
; ++i
) {
1672 struct kvmhv_tb_accumulator
*acc
;
1674 acc
= (struct kvmhv_tb_accumulator
*)
1675 ((unsigned long)vcpu
+ timings
[i
].offset
);
1677 for (loops
= 0; loops
< 1000; ++loops
) {
1678 count
= acc
->seqcount
;
1683 if (count
== acc
->seqcount
) {
1691 snprintf(s
, buf_end
- s
, "%s: stuck\n",
1694 snprintf(s
, buf_end
- s
,
1695 "%s: %llu %llu %llu %llu\n",
1696 timings
[i
].name
, count
/ 2,
1697 tb_to_ns(tb
.tb_total
),
1698 tb_to_ns(tb
.tb_min
),
1699 tb_to_ns(tb
.tb_max
));
1702 p
->buflen
= s
- p
->buf
;
1706 if (pos
>= p
->buflen
)
1708 if (len
> p
->buflen
- pos
)
1709 len
= p
->buflen
- pos
;
1710 n
= copy_to_user(buf
, p
->buf
+ pos
, len
);
1720 static ssize_t
debugfs_timings_write(struct file
*file
, const char __user
*buf
,
1721 size_t len
, loff_t
*ppos
)
1726 static const struct file_operations debugfs_timings_ops
= {
1727 .owner
= THIS_MODULE
,
1728 .open
= debugfs_timings_open
,
1729 .release
= debugfs_timings_release
,
1730 .read
= debugfs_timings_read
,
1731 .write
= debugfs_timings_write
,
1732 .llseek
= generic_file_llseek
,
1735 /* Create a debugfs directory for the vcpu */
1736 static void debugfs_vcpu_init(struct kvm_vcpu
*vcpu
, unsigned int id
)
1739 struct kvm
*kvm
= vcpu
->kvm
;
1741 snprintf(buf
, sizeof(buf
), "vcpu%u", id
);
1742 if (IS_ERR_OR_NULL(kvm
->arch
.debugfs_dir
))
1744 vcpu
->arch
.debugfs_dir
= debugfs_create_dir(buf
, kvm
->arch
.debugfs_dir
);
1745 if (IS_ERR_OR_NULL(vcpu
->arch
.debugfs_dir
))
1747 vcpu
->arch
.debugfs_timings
=
1748 debugfs_create_file("timings", 0444, vcpu
->arch
.debugfs_dir
,
1749 vcpu
, &debugfs_timings_ops
);
1752 #else /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */
1753 static void debugfs_vcpu_init(struct kvm_vcpu
*vcpu
, unsigned int id
)
1756 #endif /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */
1758 static struct kvm_vcpu
*kvmppc_core_vcpu_create_hv(struct kvm
*kvm
,
1761 struct kvm_vcpu
*vcpu
;
1764 struct kvmppc_vcore
*vcore
;
1766 core
= id
/ threads_per_vcore();
1767 if (core
>= KVM_MAX_VCORES
)
1771 vcpu
= kmem_cache_zalloc(kvm_vcpu_cache
, GFP_KERNEL
);
1775 err
= kvm_vcpu_init(vcpu
, kvm
, id
);
1779 vcpu
->arch
.shared
= &vcpu
->arch
.shregs
;
1780 #ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE
1782 * The shared struct is never shared on HV,
1783 * so we can always use host endianness
1785 #ifdef __BIG_ENDIAN__
1786 vcpu
->arch
.shared_big_endian
= true;
1788 vcpu
->arch
.shared_big_endian
= false;
1791 vcpu
->arch
.mmcr
[0] = MMCR0_FC
;
1792 vcpu
->arch
.ctrl
= CTRL_RUNLATCH
;
1793 /* default to host PVR, since we can't spoof it */
1794 kvmppc_set_pvr_hv(vcpu
, mfspr(SPRN_PVR
));
1795 spin_lock_init(&vcpu
->arch
.vpa_update_lock
);
1796 spin_lock_init(&vcpu
->arch
.tbacct_lock
);
1797 vcpu
->arch
.busy_preempt
= TB_NIL
;
1798 vcpu
->arch
.intr_msr
= MSR_SF
| MSR_ME
;
1800 kvmppc_mmu_book3s_hv_init(vcpu
);
1802 vcpu
->arch
.state
= KVMPPC_VCPU_NOTREADY
;
1804 init_waitqueue_head(&vcpu
->arch
.cpu_run
);
1806 mutex_lock(&kvm
->lock
);
1807 vcore
= kvm
->arch
.vcores
[core
];
1809 vcore
= kvmppc_vcore_create(kvm
, core
);
1810 kvm
->arch
.vcores
[core
] = vcore
;
1811 kvm
->arch
.online_vcores
++;
1813 mutex_unlock(&kvm
->lock
);
1818 spin_lock(&vcore
->lock
);
1819 ++vcore
->num_threads
;
1820 spin_unlock(&vcore
->lock
);
1821 vcpu
->arch
.vcore
= vcore
;
1822 vcpu
->arch
.ptid
= vcpu
->vcpu_id
- vcore
->first_vcpuid
;
1823 vcpu
->arch
.thread_cpu
= -1;
1825 vcpu
->arch
.cpu_type
= KVM_CPU_3S_64
;
1826 kvmppc_sanity_check(vcpu
);
1828 debugfs_vcpu_init(vcpu
, id
);
1833 kmem_cache_free(kvm_vcpu_cache
, vcpu
);
1835 return ERR_PTR(err
);
1838 static void unpin_vpa(struct kvm
*kvm
, struct kvmppc_vpa
*vpa
)
1840 if (vpa
->pinned_addr
)
1841 kvmppc_unpin_guest_page(kvm
, vpa
->pinned_addr
, vpa
->gpa
,
1845 static void kvmppc_core_vcpu_free_hv(struct kvm_vcpu
*vcpu
)
1847 spin_lock(&vcpu
->arch
.vpa_update_lock
);
1848 unpin_vpa(vcpu
->kvm
, &vcpu
->arch
.dtl
);
1849 unpin_vpa(vcpu
->kvm
, &vcpu
->arch
.slb_shadow
);
1850 unpin_vpa(vcpu
->kvm
, &vcpu
->arch
.vpa
);
1851 spin_unlock(&vcpu
->arch
.vpa_update_lock
);
1852 kvm_vcpu_uninit(vcpu
);
1853 kmem_cache_free(kvm_vcpu_cache
, vcpu
);
1856 static int kvmppc_core_check_requests_hv(struct kvm_vcpu
*vcpu
)
1858 /* Indicate we want to get back into the guest */
1862 static void kvmppc_set_timer(struct kvm_vcpu
*vcpu
)
1864 unsigned long dec_nsec
, now
;
1867 if (now
> vcpu
->arch
.dec_expires
) {
1868 /* decrementer has already gone negative */
1869 kvmppc_core_queue_dec(vcpu
);
1870 kvmppc_core_prepare_to_enter(vcpu
);
1873 dec_nsec
= (vcpu
->arch
.dec_expires
- now
) * NSEC_PER_SEC
1875 hrtimer_start(&vcpu
->arch
.dec_timer
, ktime_set(0, dec_nsec
),
1877 vcpu
->arch
.timer_running
= 1;
1880 static void kvmppc_end_cede(struct kvm_vcpu
*vcpu
)
1882 vcpu
->arch
.ceded
= 0;
1883 if (vcpu
->arch
.timer_running
) {
1884 hrtimer_try_to_cancel(&vcpu
->arch
.dec_timer
);
1885 vcpu
->arch
.timer_running
= 0;
1889 extern void __kvmppc_vcore_entry(void);
1891 static void kvmppc_remove_runnable(struct kvmppc_vcore
*vc
,
1892 struct kvm_vcpu
*vcpu
)
1896 if (vcpu
->arch
.state
!= KVMPPC_VCPU_RUNNABLE
)
1898 spin_lock_irq(&vcpu
->arch
.tbacct_lock
);
1900 vcpu
->arch
.busy_stolen
+= vcore_stolen_time(vc
, now
) -
1901 vcpu
->arch
.stolen_logged
;
1902 vcpu
->arch
.busy_preempt
= now
;
1903 vcpu
->arch
.state
= KVMPPC_VCPU_BUSY_IN_HOST
;
1904 spin_unlock_irq(&vcpu
->arch
.tbacct_lock
);
1906 WRITE_ONCE(vc
->runnable_threads
[vcpu
->arch
.ptid
], NULL
);
1909 static int kvmppc_grab_hwthread(int cpu
)
1911 struct paca_struct
*tpaca
;
1912 long timeout
= 10000;
1916 /* Ensure the thread won't go into the kernel if it wakes */
1917 tpaca
->kvm_hstate
.kvm_vcpu
= NULL
;
1918 tpaca
->kvm_hstate
.kvm_vcore
= NULL
;
1919 tpaca
->kvm_hstate
.napping
= 0;
1921 tpaca
->kvm_hstate
.hwthread_req
= 1;
1924 * If the thread is already executing in the kernel (e.g. handling
1925 * a stray interrupt), wait for it to get back to nap mode.
1926 * The smp_mb() is to ensure that our setting of hwthread_req
1927 * is visible before we look at hwthread_state, so if this
1928 * races with the code at system_reset_pSeries and the thread
1929 * misses our setting of hwthread_req, we are sure to see its
1930 * setting of hwthread_state, and vice versa.
1933 while (tpaca
->kvm_hstate
.hwthread_state
== KVM_HWTHREAD_IN_KERNEL
) {
1934 if (--timeout
<= 0) {
1935 pr_err("KVM: couldn't grab cpu %d\n", cpu
);
1943 static void kvmppc_release_hwthread(int cpu
)
1945 struct paca_struct
*tpaca
;
1948 tpaca
->kvm_hstate
.hwthread_req
= 0;
1949 tpaca
->kvm_hstate
.kvm_vcpu
= NULL
;
1950 tpaca
->kvm_hstate
.kvm_vcore
= NULL
;
1951 tpaca
->kvm_hstate
.kvm_split_mode
= NULL
;
1954 static void kvmppc_start_thread(struct kvm_vcpu
*vcpu
, struct kvmppc_vcore
*vc
)
1957 struct paca_struct
*tpaca
;
1958 struct kvmppc_vcore
*mvc
= vc
->master_vcore
;
1962 if (vcpu
->arch
.timer_running
) {
1963 hrtimer_try_to_cancel(&vcpu
->arch
.dec_timer
);
1964 vcpu
->arch
.timer_running
= 0;
1966 cpu
+= vcpu
->arch
.ptid
;
1967 vcpu
->cpu
= mvc
->pcpu
;
1968 vcpu
->arch
.thread_cpu
= cpu
;
1971 tpaca
->kvm_hstate
.kvm_vcpu
= vcpu
;
1972 tpaca
->kvm_hstate
.ptid
= cpu
- mvc
->pcpu
;
1973 /* Order stores to hstate.kvm_vcpu etc. before store to kvm_vcore */
1975 tpaca
->kvm_hstate
.kvm_vcore
= mvc
;
1976 if (cpu
!= smp_processor_id())
1977 kvmppc_ipi_thread(cpu
);
1980 static void kvmppc_wait_for_nap(void)
1982 int cpu
= smp_processor_id();
1984 int n_threads
= threads_per_vcore();
1988 for (loops
= 0; loops
< 1000000; ++loops
) {
1990 * Check if all threads are finished.
1991 * We set the vcore pointer when starting a thread
1992 * and the thread clears it when finished, so we look
1993 * for any threads that still have a non-NULL vcore ptr.
1995 for (i
= 1; i
< n_threads
; ++i
)
1996 if (paca
[cpu
+ i
].kvm_hstate
.kvm_vcore
)
1998 if (i
== n_threads
) {
2005 for (i
= 1; i
< n_threads
; ++i
)
2006 if (paca
[cpu
+ i
].kvm_hstate
.kvm_vcore
)
2007 pr_err("KVM: CPU %d seems to be stuck\n", cpu
+ i
);
2011 * Check that we are on thread 0 and that any other threads in
2012 * this core are off-line. Then grab the threads so they can't
2015 static int on_primary_thread(void)
2017 int cpu
= smp_processor_id();
2020 /* Are we on a primary subcore? */
2021 if (cpu_thread_in_subcore(cpu
))
2025 while (++thr
< threads_per_subcore
)
2026 if (cpu_online(cpu
+ thr
))
2029 /* Grab all hw threads so they can't go into the kernel */
2030 for (thr
= 1; thr
< threads_per_subcore
; ++thr
) {
2031 if (kvmppc_grab_hwthread(cpu
+ thr
)) {
2032 /* Couldn't grab one; let the others go */
2034 kvmppc_release_hwthread(cpu
+ thr
);
2035 } while (--thr
> 0);
2043 * A list of virtual cores for each physical CPU.
2044 * These are vcores that could run but their runner VCPU tasks are
2045 * (or may be) preempted.
2047 struct preempted_vcore_list
{
2048 struct list_head list
;
2052 static DEFINE_PER_CPU(struct preempted_vcore_list
, preempted_vcores
);
2054 static void init_vcore_lists(void)
2058 for_each_possible_cpu(cpu
) {
2059 struct preempted_vcore_list
*lp
= &per_cpu(preempted_vcores
, cpu
);
2060 spin_lock_init(&lp
->lock
);
2061 INIT_LIST_HEAD(&lp
->list
);
2065 static void kvmppc_vcore_preempt(struct kvmppc_vcore
*vc
)
2067 struct preempted_vcore_list
*lp
= this_cpu_ptr(&preempted_vcores
);
2069 vc
->vcore_state
= VCORE_PREEMPT
;
2070 vc
->pcpu
= smp_processor_id();
2071 if (vc
->num_threads
< threads_per_vcore()) {
2072 spin_lock(&lp
->lock
);
2073 list_add_tail(&vc
->preempt_list
, &lp
->list
);
2074 spin_unlock(&lp
->lock
);
2077 /* Start accumulating stolen time */
2078 kvmppc_core_start_stolen(vc
);
2081 static void kvmppc_vcore_end_preempt(struct kvmppc_vcore
*vc
)
2083 struct preempted_vcore_list
*lp
;
2085 kvmppc_core_end_stolen(vc
);
2086 if (!list_empty(&vc
->preempt_list
)) {
2087 lp
= &per_cpu(preempted_vcores
, vc
->pcpu
);
2088 spin_lock(&lp
->lock
);
2089 list_del_init(&vc
->preempt_list
);
2090 spin_unlock(&lp
->lock
);
2092 vc
->vcore_state
= VCORE_INACTIVE
;
2096 * This stores information about the virtual cores currently
2097 * assigned to a physical core.
2101 int max_subcore_threads
;
2103 int subcore_threads
[MAX_SUBCORES
];
2104 struct kvm
*subcore_vm
[MAX_SUBCORES
];
2105 struct list_head vcs
[MAX_SUBCORES
];
2109 * This mapping means subcores 0 and 1 can use threads 0-3 and 4-7
2110 * respectively in 2-way micro-threading (split-core) mode.
2112 static int subcore_thread_map
[MAX_SUBCORES
] = { 0, 4, 2, 6 };
2114 static void init_core_info(struct core_info
*cip
, struct kvmppc_vcore
*vc
)
2118 memset(cip
, 0, sizeof(*cip
));
2119 cip
->n_subcores
= 1;
2120 cip
->max_subcore_threads
= vc
->num_threads
;
2121 cip
->total_threads
= vc
->num_threads
;
2122 cip
->subcore_threads
[0] = vc
->num_threads
;
2123 cip
->subcore_vm
[0] = vc
->kvm
;
2124 for (sub
= 0; sub
< MAX_SUBCORES
; ++sub
)
2125 INIT_LIST_HEAD(&cip
->vcs
[sub
]);
2126 list_add_tail(&vc
->preempt_list
, &cip
->vcs
[0]);
2129 static bool subcore_config_ok(int n_subcores
, int n_threads
)
2131 /* Can only dynamically split if unsplit to begin with */
2132 if (n_subcores
> 1 && threads_per_subcore
< MAX_SMT_THREADS
)
2134 if (n_subcores
> MAX_SUBCORES
)
2136 if (n_subcores
> 1) {
2137 if (!(dynamic_mt_modes
& 2))
2139 if (n_subcores
> 2 && !(dynamic_mt_modes
& 4))
2143 return n_subcores
* roundup_pow_of_two(n_threads
) <= MAX_SMT_THREADS
;
2146 static void init_master_vcore(struct kvmppc_vcore
*vc
)
2148 vc
->master_vcore
= vc
;
2149 vc
->entry_exit_map
= 0;
2151 vc
->napping_threads
= 0;
2152 vc
->conferring_threads
= 0;
2155 static bool can_dynamic_split(struct kvmppc_vcore
*vc
, struct core_info
*cip
)
2157 int n_threads
= vc
->num_threads
;
2160 if (!cpu_has_feature(CPU_FTR_ARCH_207S
))
2163 if (n_threads
< cip
->max_subcore_threads
)
2164 n_threads
= cip
->max_subcore_threads
;
2165 if (!subcore_config_ok(cip
->n_subcores
+ 1, n_threads
))
2167 cip
->max_subcore_threads
= n_threads
;
2169 sub
= cip
->n_subcores
;
2171 cip
->total_threads
+= vc
->num_threads
;
2172 cip
->subcore_threads
[sub
] = vc
->num_threads
;
2173 cip
->subcore_vm
[sub
] = vc
->kvm
;
2174 init_master_vcore(vc
);
2175 list_move_tail(&vc
->preempt_list
, &cip
->vcs
[sub
]);
2181 * Work out whether it is possible to piggyback the execution of
2182 * vcore *pvc onto the execution of the other vcores described in *cip.
2184 static bool can_piggyback(struct kvmppc_vcore
*pvc
, struct core_info
*cip
,
2187 if (cip
->total_threads
+ pvc
->num_threads
> target_threads
)
2190 return can_dynamic_split(pvc
, cip
);
2193 static void prepare_threads(struct kvmppc_vcore
*vc
)
2196 struct kvm_vcpu
*vcpu
;
2198 for_each_runnable_thread(i
, vcpu
, vc
) {
2199 if (signal_pending(vcpu
->arch
.run_task
))
2200 vcpu
->arch
.ret
= -EINTR
;
2201 else if (vcpu
->arch
.vpa
.update_pending
||
2202 vcpu
->arch
.slb_shadow
.update_pending
||
2203 vcpu
->arch
.dtl
.update_pending
)
2204 vcpu
->arch
.ret
= RESUME_GUEST
;
2207 kvmppc_remove_runnable(vc
, vcpu
);
2208 wake_up(&vcpu
->arch
.cpu_run
);
2212 static void collect_piggybacks(struct core_info
*cip
, int target_threads
)
2214 struct preempted_vcore_list
*lp
= this_cpu_ptr(&preempted_vcores
);
2215 struct kvmppc_vcore
*pvc
, *vcnext
;
2217 spin_lock(&lp
->lock
);
2218 list_for_each_entry_safe(pvc
, vcnext
, &lp
->list
, preempt_list
) {
2219 if (!spin_trylock(&pvc
->lock
))
2221 prepare_threads(pvc
);
2222 if (!pvc
->n_runnable
) {
2223 list_del_init(&pvc
->preempt_list
);
2224 if (pvc
->runner
== NULL
) {
2225 pvc
->vcore_state
= VCORE_INACTIVE
;
2226 kvmppc_core_end_stolen(pvc
);
2228 spin_unlock(&pvc
->lock
);
2231 if (!can_piggyback(pvc
, cip
, target_threads
)) {
2232 spin_unlock(&pvc
->lock
);
2235 kvmppc_core_end_stolen(pvc
);
2236 pvc
->vcore_state
= VCORE_PIGGYBACK
;
2237 if (cip
->total_threads
>= target_threads
)
2240 spin_unlock(&lp
->lock
);
2243 static void post_guest_process(struct kvmppc_vcore
*vc
, bool is_master
)
2245 int still_running
= 0, i
;
2248 struct kvm_vcpu
*vcpu
;
2250 spin_lock(&vc
->lock
);
2252 for_each_runnable_thread(i
, vcpu
, vc
) {
2253 /* cancel pending dec exception if dec is positive */
2254 if (now
< vcpu
->arch
.dec_expires
&&
2255 kvmppc_core_pending_dec(vcpu
))
2256 kvmppc_core_dequeue_dec(vcpu
);
2258 trace_kvm_guest_exit(vcpu
);
2261 if (vcpu
->arch
.trap
)
2262 ret
= kvmppc_handle_exit_hv(vcpu
->arch
.kvm_run
, vcpu
,
2263 vcpu
->arch
.run_task
);
2265 vcpu
->arch
.ret
= ret
;
2266 vcpu
->arch
.trap
= 0;
2268 if (is_kvmppc_resume_guest(vcpu
->arch
.ret
)) {
2269 if (vcpu
->arch
.pending_exceptions
)
2270 kvmppc_core_prepare_to_enter(vcpu
);
2271 if (vcpu
->arch
.ceded
)
2272 kvmppc_set_timer(vcpu
);
2276 kvmppc_remove_runnable(vc
, vcpu
);
2277 wake_up(&vcpu
->arch
.cpu_run
);
2280 list_del_init(&vc
->preempt_list
);
2282 if (still_running
> 0) {
2283 kvmppc_vcore_preempt(vc
);
2284 } else if (vc
->runner
) {
2285 vc
->vcore_state
= VCORE_PREEMPT
;
2286 kvmppc_core_start_stolen(vc
);
2288 vc
->vcore_state
= VCORE_INACTIVE
;
2290 if (vc
->n_runnable
> 0 && vc
->runner
== NULL
) {
2291 /* make sure there's a candidate runner awake */
2293 vcpu
= next_runnable_thread(vc
, &i
);
2294 wake_up(&vcpu
->arch
.cpu_run
);
2297 spin_unlock(&vc
->lock
);
2301 * Clear core from the list of active host cores as we are about to
2302 * enter the guest. Only do this if it is the primary thread of the
2303 * core (not if a subcore) that is entering the guest.
2305 static inline int kvmppc_clear_host_core(unsigned int cpu
)
2309 if (!kvmppc_host_rm_ops_hv
|| cpu_thread_in_core(cpu
))
2312 * Memory barrier can be omitted here as we will do a smp_wmb()
2313 * later in kvmppc_start_thread and we need ensure that state is
2314 * visible to other CPUs only after we enter guest.
2316 core
= cpu
>> threads_shift
;
2317 kvmppc_host_rm_ops_hv
->rm_core
[core
].rm_state
.in_host
= 0;
2322 * Advertise this core as an active host core since we exited the guest
2323 * Only need to do this if it is the primary thread of the core that is
2326 static inline int kvmppc_set_host_core(unsigned int cpu
)
2330 if (!kvmppc_host_rm_ops_hv
|| cpu_thread_in_core(cpu
))
2334 * Memory barrier can be omitted here because we do a spin_unlock
2335 * immediately after this which provides the memory barrier.
2337 core
= cpu
>> threads_shift
;
2338 kvmppc_host_rm_ops_hv
->rm_core
[core
].rm_state
.in_host
= 1;
2343 * Run a set of guest threads on a physical core.
2344 * Called with vc->lock held.
2346 static noinline
void kvmppc_run_core(struct kvmppc_vcore
*vc
)
2348 struct kvm_vcpu
*vcpu
;
2351 struct core_info core_info
;
2352 struct kvmppc_vcore
*pvc
, *vcnext
;
2353 struct kvm_split_mode split_info
, *sip
;
2354 int split
, subcore_size
, active
;
2357 unsigned long cmd_bit
, stat_bit
;
2360 int controlled_threads
;
2363 * Remove from the list any threads that have a signal pending
2364 * or need a VPA update done
2366 prepare_threads(vc
);
2368 /* if the runner is no longer runnable, let the caller pick a new one */
2369 if (vc
->runner
->arch
.state
!= KVMPPC_VCPU_RUNNABLE
)
2375 init_master_vcore(vc
);
2376 vc
->preempt_tb
= TB_NIL
;
2379 * Number of threads that we will be controlling: the same as
2380 * the number of threads per subcore, except on POWER9,
2381 * where it's 1 because the threads are (mostly) independent.
2383 controlled_threads
= threads_per_vcore();
2386 * Make sure we are running on primary threads, and that secondary
2387 * threads are offline. Also check if the number of threads in this
2388 * guest are greater than the current system threads per guest.
2390 if ((controlled_threads
> 1) &&
2391 ((vc
->num_threads
> threads_per_subcore
) || !on_primary_thread())) {
2392 for_each_runnable_thread(i
, vcpu
, vc
) {
2393 vcpu
->arch
.ret
= -EBUSY
;
2394 kvmppc_remove_runnable(vc
, vcpu
);
2395 wake_up(&vcpu
->arch
.cpu_run
);
2401 * See if we could run any other vcores on the physical core
2402 * along with this one.
2404 init_core_info(&core_info
, vc
);
2405 pcpu
= smp_processor_id();
2406 target_threads
= controlled_threads
;
2407 if (target_smt_mode
&& target_smt_mode
< target_threads
)
2408 target_threads
= target_smt_mode
;
2409 if (vc
->num_threads
< target_threads
)
2410 collect_piggybacks(&core_info
, target_threads
);
2412 /* Decide on micro-threading (split-core) mode */
2413 subcore_size
= threads_per_subcore
;
2414 cmd_bit
= stat_bit
= 0;
2415 split
= core_info
.n_subcores
;
2418 /* threads_per_subcore must be MAX_SMT_THREADS (8) here */
2419 if (split
== 2 && (dynamic_mt_modes
& 2)) {
2420 cmd_bit
= HID0_POWER8_1TO2LPAR
;
2421 stat_bit
= HID0_POWER8_2LPARMODE
;
2424 cmd_bit
= HID0_POWER8_1TO4LPAR
;
2425 stat_bit
= HID0_POWER8_4LPARMODE
;
2427 subcore_size
= MAX_SMT_THREADS
/ split
;
2429 memset(&split_info
, 0, sizeof(split_info
));
2430 split_info
.rpr
= mfspr(SPRN_RPR
);
2431 split_info
.pmmar
= mfspr(SPRN_PMMAR
);
2432 split_info
.ldbar
= mfspr(SPRN_LDBAR
);
2433 split_info
.subcore_size
= subcore_size
;
2434 for (sub
= 0; sub
< core_info
.n_subcores
; ++sub
)
2435 split_info
.master_vcs
[sub
] =
2436 list_first_entry(&core_info
.vcs
[sub
],
2437 struct kvmppc_vcore
, preempt_list
);
2438 /* order writes to split_info before kvm_split_mode pointer */
2441 pcpu
= smp_processor_id();
2442 for (thr
= 0; thr
< controlled_threads
; ++thr
)
2443 paca
[pcpu
+ thr
].kvm_hstate
.kvm_split_mode
= sip
;
2445 /* Initiate micro-threading (split-core) if required */
2447 unsigned long hid0
= mfspr(SPRN_HID0
);
2449 hid0
|= cmd_bit
| HID0_POWER8_DYNLPARDIS
;
2451 mtspr(SPRN_HID0
, hid0
);
2454 hid0
= mfspr(SPRN_HID0
);
2455 if (hid0
& stat_bit
)
2461 kvmppc_clear_host_core(pcpu
);
2463 /* Start all the threads */
2465 for (sub
= 0; sub
< core_info
.n_subcores
; ++sub
) {
2466 thr
= subcore_thread_map
[sub
];
2469 list_for_each_entry(pvc
, &core_info
.vcs
[sub
], preempt_list
) {
2470 pvc
->pcpu
= pcpu
+ thr
;
2471 for_each_runnable_thread(i
, vcpu
, pvc
) {
2472 kvmppc_start_thread(vcpu
, pvc
);
2473 kvmppc_create_dtl_entry(vcpu
, pvc
);
2474 trace_kvm_guest_enter(vcpu
);
2475 if (!vcpu
->arch
.ptid
)
2477 active
|= 1 << (thr
+ vcpu
->arch
.ptid
);
2480 * We need to start the first thread of each subcore
2481 * even if it doesn't have a vcpu.
2483 if (pvc
->master_vcore
== pvc
&& !thr0_done
)
2484 kvmppc_start_thread(NULL
, pvc
);
2485 thr
+= pvc
->num_threads
;
2490 * Ensure that split_info.do_nap is set after setting
2491 * the vcore pointer in the PACA of the secondaries.
2495 split_info
.do_nap
= 1; /* ask secondaries to nap when done */
2498 * When doing micro-threading, poke the inactive threads as well.
2499 * This gets them to the nap instruction after kvm_do_nap,
2500 * which reduces the time taken to unsplit later.
2503 for (thr
= 1; thr
< threads_per_subcore
; ++thr
)
2504 if (!(active
& (1 << thr
)))
2505 kvmppc_ipi_thread(pcpu
+ thr
);
2507 vc
->vcore_state
= VCORE_RUNNING
;
2510 trace_kvmppc_run_core(vc
, 0);
2512 for (sub
= 0; sub
< core_info
.n_subcores
; ++sub
)
2513 list_for_each_entry(pvc
, &core_info
.vcs
[sub
], preempt_list
)
2514 spin_unlock(&pvc
->lock
);
2518 srcu_idx
= srcu_read_lock(&vc
->kvm
->srcu
);
2520 __kvmppc_vcore_entry();
2522 srcu_read_unlock(&vc
->kvm
->srcu
, srcu_idx
);
2524 spin_lock(&vc
->lock
);
2525 /* prevent other vcpu threads from doing kvmppc_start_thread() now */
2526 vc
->vcore_state
= VCORE_EXITING
;
2528 /* wait for secondary threads to finish writing their state to memory */
2529 kvmppc_wait_for_nap();
2531 /* Return to whole-core mode if we split the core earlier */
2533 unsigned long hid0
= mfspr(SPRN_HID0
);
2534 unsigned long loops
= 0;
2536 hid0
&= ~HID0_POWER8_DYNLPARDIS
;
2537 stat_bit
= HID0_POWER8_2LPARMODE
| HID0_POWER8_4LPARMODE
;
2539 mtspr(SPRN_HID0
, hid0
);
2542 hid0
= mfspr(SPRN_HID0
);
2543 if (!(hid0
& stat_bit
))
2548 split_info
.do_nap
= 0;
2551 /* Let secondaries go back to the offline loop */
2552 for (i
= 0; i
< controlled_threads
; ++i
) {
2553 kvmppc_release_hwthread(pcpu
+ i
);
2554 if (sip
&& sip
->napped
[i
])
2555 kvmppc_ipi_thread(pcpu
+ i
);
2558 kvmppc_set_host_core(pcpu
);
2560 spin_unlock(&vc
->lock
);
2562 /* make sure updates to secondary vcpu structs are visible now */
2566 for (sub
= 0; sub
< core_info
.n_subcores
; ++sub
)
2567 list_for_each_entry_safe(pvc
, vcnext
, &core_info
.vcs
[sub
],
2569 post_guest_process(pvc
, pvc
== vc
);
2571 spin_lock(&vc
->lock
);
2575 vc
->vcore_state
= VCORE_INACTIVE
;
2576 trace_kvmppc_run_core(vc
, 1);
2580 * Wait for some other vcpu thread to execute us, and
2581 * wake us up when we need to handle something in the host.
2583 static void kvmppc_wait_for_exec(struct kvmppc_vcore
*vc
,
2584 struct kvm_vcpu
*vcpu
, int wait_state
)
2588 prepare_to_wait(&vcpu
->arch
.cpu_run
, &wait
, wait_state
);
2589 if (vcpu
->arch
.state
== KVMPPC_VCPU_RUNNABLE
) {
2590 spin_unlock(&vc
->lock
);
2592 spin_lock(&vc
->lock
);
2594 finish_wait(&vcpu
->arch
.cpu_run
, &wait
);
2597 static void grow_halt_poll_ns(struct kvmppc_vcore
*vc
)
2600 if (vc
->halt_poll_ns
== 0 && halt_poll_ns_grow
)
2601 vc
->halt_poll_ns
= 10000;
2603 vc
->halt_poll_ns
*= halt_poll_ns_grow
;
2606 static void shrink_halt_poll_ns(struct kvmppc_vcore
*vc
)
2608 if (halt_poll_ns_shrink
== 0)
2609 vc
->halt_poll_ns
= 0;
2611 vc
->halt_poll_ns
/= halt_poll_ns_shrink
;
2615 * Check to see if any of the runnable vcpus on the vcore have pending
2616 * exceptions or are no longer ceded
2618 static int kvmppc_vcore_check_block(struct kvmppc_vcore
*vc
)
2620 struct kvm_vcpu
*vcpu
;
2623 for_each_runnable_thread(i
, vcpu
, vc
) {
2624 if (vcpu
->arch
.pending_exceptions
|| !vcpu
->arch
.ceded
)
2632 * All the vcpus in this vcore are idle, so wait for a decrementer
2633 * or external interrupt to one of the vcpus. vc->lock is held.
2635 static void kvmppc_vcore_blocked(struct kvmppc_vcore
*vc
)
2637 ktime_t cur
, start_poll
, start_wait
;
2640 DECLARE_SWAITQUEUE(wait
);
2642 /* Poll for pending exceptions and ceded state */
2643 cur
= start_poll
= ktime_get();
2644 if (vc
->halt_poll_ns
) {
2645 ktime_t stop
= ktime_add_ns(start_poll
, vc
->halt_poll_ns
);
2646 ++vc
->runner
->stat
.halt_attempted_poll
;
2648 vc
->vcore_state
= VCORE_POLLING
;
2649 spin_unlock(&vc
->lock
);
2652 if (kvmppc_vcore_check_block(vc
)) {
2657 } while (single_task_running() && ktime_before(cur
, stop
));
2659 spin_lock(&vc
->lock
);
2660 vc
->vcore_state
= VCORE_INACTIVE
;
2663 ++vc
->runner
->stat
.halt_successful_poll
;
2668 prepare_to_swait(&vc
->wq
, &wait
, TASK_INTERRUPTIBLE
);
2670 if (kvmppc_vcore_check_block(vc
)) {
2671 finish_swait(&vc
->wq
, &wait
);
2673 /* If we polled, count this as a successful poll */
2674 if (vc
->halt_poll_ns
)
2675 ++vc
->runner
->stat
.halt_successful_poll
;
2679 start_wait
= ktime_get();
2681 vc
->vcore_state
= VCORE_SLEEPING
;
2682 trace_kvmppc_vcore_blocked(vc
, 0);
2683 spin_unlock(&vc
->lock
);
2685 finish_swait(&vc
->wq
, &wait
);
2686 spin_lock(&vc
->lock
);
2687 vc
->vcore_state
= VCORE_INACTIVE
;
2688 trace_kvmppc_vcore_blocked(vc
, 1);
2689 ++vc
->runner
->stat
.halt_successful_wait
;
2694 block_ns
= ktime_to_ns(cur
) - ktime_to_ns(start_poll
);
2696 /* Attribute wait time */
2698 vc
->runner
->stat
.halt_wait_ns
+=
2699 ktime_to_ns(cur
) - ktime_to_ns(start_wait
);
2700 /* Attribute failed poll time */
2701 if (vc
->halt_poll_ns
)
2702 vc
->runner
->stat
.halt_poll_fail_ns
+=
2703 ktime_to_ns(start_wait
) -
2704 ktime_to_ns(start_poll
);
2706 /* Attribute successful poll time */
2707 if (vc
->halt_poll_ns
)
2708 vc
->runner
->stat
.halt_poll_success_ns
+=
2710 ktime_to_ns(start_poll
);
2713 /* Adjust poll time */
2715 if (block_ns
<= vc
->halt_poll_ns
)
2717 /* We slept and blocked for longer than the max halt time */
2718 else if (vc
->halt_poll_ns
&& block_ns
> halt_poll_ns
)
2719 shrink_halt_poll_ns(vc
);
2720 /* We slept and our poll time is too small */
2721 else if (vc
->halt_poll_ns
< halt_poll_ns
&&
2722 block_ns
< halt_poll_ns
)
2723 grow_halt_poll_ns(vc
);
2724 if (vc
->halt_poll_ns
> halt_poll_ns
)
2725 vc
->halt_poll_ns
= halt_poll_ns
;
2727 vc
->halt_poll_ns
= 0;
2729 trace_kvmppc_vcore_wakeup(do_sleep
, block_ns
);
2732 static int kvmppc_run_vcpu(struct kvm_run
*kvm_run
, struct kvm_vcpu
*vcpu
)
2735 struct kvmppc_vcore
*vc
;
2738 trace_kvmppc_run_vcpu_enter(vcpu
);
2740 kvm_run
->exit_reason
= 0;
2741 vcpu
->arch
.ret
= RESUME_GUEST
;
2742 vcpu
->arch
.trap
= 0;
2743 kvmppc_update_vpas(vcpu
);
2746 * Synchronize with other threads in this virtual core
2748 vc
= vcpu
->arch
.vcore
;
2749 spin_lock(&vc
->lock
);
2750 vcpu
->arch
.ceded
= 0;
2751 vcpu
->arch
.run_task
= current
;
2752 vcpu
->arch
.kvm_run
= kvm_run
;
2753 vcpu
->arch
.stolen_logged
= vcore_stolen_time(vc
, mftb());
2754 vcpu
->arch
.state
= KVMPPC_VCPU_RUNNABLE
;
2755 vcpu
->arch
.busy_preempt
= TB_NIL
;
2756 WRITE_ONCE(vc
->runnable_threads
[vcpu
->arch
.ptid
], vcpu
);
2760 * This happens the first time this is called for a vcpu.
2761 * If the vcore is already running, we may be able to start
2762 * this thread straight away and have it join in.
2764 if (!signal_pending(current
)) {
2765 if (vc
->vcore_state
== VCORE_PIGGYBACK
) {
2766 struct kvmppc_vcore
*mvc
= vc
->master_vcore
;
2767 if (spin_trylock(&mvc
->lock
)) {
2768 if (mvc
->vcore_state
== VCORE_RUNNING
&&
2769 !VCORE_IS_EXITING(mvc
)) {
2770 kvmppc_create_dtl_entry(vcpu
, vc
);
2771 kvmppc_start_thread(vcpu
, vc
);
2772 trace_kvm_guest_enter(vcpu
);
2774 spin_unlock(&mvc
->lock
);
2776 } else if (vc
->vcore_state
== VCORE_RUNNING
&&
2777 !VCORE_IS_EXITING(vc
)) {
2778 kvmppc_create_dtl_entry(vcpu
, vc
);
2779 kvmppc_start_thread(vcpu
, vc
);
2780 trace_kvm_guest_enter(vcpu
);
2781 } else if (vc
->vcore_state
== VCORE_SLEEPING
) {
2787 while (vcpu
->arch
.state
== KVMPPC_VCPU_RUNNABLE
&&
2788 !signal_pending(current
)) {
2789 if (vc
->vcore_state
== VCORE_PREEMPT
&& vc
->runner
== NULL
)
2790 kvmppc_vcore_end_preempt(vc
);
2792 if (vc
->vcore_state
!= VCORE_INACTIVE
) {
2793 kvmppc_wait_for_exec(vc
, vcpu
, TASK_INTERRUPTIBLE
);
2796 for_each_runnable_thread(i
, v
, vc
) {
2797 kvmppc_core_prepare_to_enter(v
);
2798 if (signal_pending(v
->arch
.run_task
)) {
2799 kvmppc_remove_runnable(vc
, v
);
2800 v
->stat
.signal_exits
++;
2801 v
->arch
.kvm_run
->exit_reason
= KVM_EXIT_INTR
;
2802 v
->arch
.ret
= -EINTR
;
2803 wake_up(&v
->arch
.cpu_run
);
2806 if (!vc
->n_runnable
|| vcpu
->arch
.state
!= KVMPPC_VCPU_RUNNABLE
)
2809 for_each_runnable_thread(i
, v
, vc
) {
2810 if (!v
->arch
.pending_exceptions
)
2811 n_ceded
+= v
->arch
.ceded
;
2816 if (n_ceded
== vc
->n_runnable
) {
2817 kvmppc_vcore_blocked(vc
);
2818 } else if (need_resched()) {
2819 kvmppc_vcore_preempt(vc
);
2820 /* Let something else run */
2821 cond_resched_lock(&vc
->lock
);
2822 if (vc
->vcore_state
== VCORE_PREEMPT
)
2823 kvmppc_vcore_end_preempt(vc
);
2825 kvmppc_run_core(vc
);
2830 while (vcpu
->arch
.state
== KVMPPC_VCPU_RUNNABLE
&&
2831 (vc
->vcore_state
== VCORE_RUNNING
||
2832 vc
->vcore_state
== VCORE_EXITING
||
2833 vc
->vcore_state
== VCORE_PIGGYBACK
))
2834 kvmppc_wait_for_exec(vc
, vcpu
, TASK_UNINTERRUPTIBLE
);
2836 if (vc
->vcore_state
== VCORE_PREEMPT
&& vc
->runner
== NULL
)
2837 kvmppc_vcore_end_preempt(vc
);
2839 if (vcpu
->arch
.state
== KVMPPC_VCPU_RUNNABLE
) {
2840 kvmppc_remove_runnable(vc
, vcpu
);
2841 vcpu
->stat
.signal_exits
++;
2842 kvm_run
->exit_reason
= KVM_EXIT_INTR
;
2843 vcpu
->arch
.ret
= -EINTR
;
2846 if (vc
->n_runnable
&& vc
->vcore_state
== VCORE_INACTIVE
) {
2847 /* Wake up some vcpu to run the core */
2849 v
= next_runnable_thread(vc
, &i
);
2850 wake_up(&v
->arch
.cpu_run
);
2853 trace_kvmppc_run_vcpu_exit(vcpu
, kvm_run
);
2854 spin_unlock(&vc
->lock
);
2855 return vcpu
->arch
.ret
;
2858 static int kvmppc_vcpu_run_hv(struct kvm_run
*run
, struct kvm_vcpu
*vcpu
)
2863 if (!vcpu
->arch
.sane
) {
2864 run
->exit_reason
= KVM_EXIT_INTERNAL_ERROR
;
2868 kvmppc_core_prepare_to_enter(vcpu
);
2870 /* No need to go into the guest when all we'll do is come back out */
2871 if (signal_pending(current
)) {
2872 run
->exit_reason
= KVM_EXIT_INTR
;
2876 atomic_inc(&vcpu
->kvm
->arch
.vcpus_running
);
2877 /* Order vcpus_running vs. hpte_setup_done, see kvmppc_alloc_reset_hpt */
2880 /* On the first time here, set up HTAB and VRMA */
2881 if (!vcpu
->kvm
->arch
.hpte_setup_done
) {
2882 r
= kvmppc_hv_setup_htab_rma(vcpu
);
2887 flush_all_to_thread(current
);
2889 vcpu
->arch
.wqp
= &vcpu
->arch
.vcore
->wq
;
2890 vcpu
->arch
.pgdir
= current
->mm
->pgd
;
2891 vcpu
->arch
.state
= KVMPPC_VCPU_BUSY_IN_HOST
;
2894 r
= kvmppc_run_vcpu(run
, vcpu
);
2896 if (run
->exit_reason
== KVM_EXIT_PAPR_HCALL
&&
2897 !(vcpu
->arch
.shregs
.msr
& MSR_PR
)) {
2898 trace_kvm_hcall_enter(vcpu
);
2899 r
= kvmppc_pseries_do_hcall(vcpu
);
2900 trace_kvm_hcall_exit(vcpu
, r
);
2901 kvmppc_core_prepare_to_enter(vcpu
);
2902 } else if (r
== RESUME_PAGE_FAULT
) {
2903 srcu_idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
2904 r
= kvmppc_book3s_hv_page_fault(run
, vcpu
,
2905 vcpu
->arch
.fault_dar
, vcpu
->arch
.fault_dsisr
);
2906 srcu_read_unlock(&vcpu
->kvm
->srcu
, srcu_idx
);
2907 } else if (r
== RESUME_PASSTHROUGH
)
2908 r
= kvmppc_xics_rm_complete(vcpu
, 0);
2909 } while (is_kvmppc_resume_guest(r
));
2912 vcpu
->arch
.state
= KVMPPC_VCPU_NOTREADY
;
2913 atomic_dec(&vcpu
->kvm
->arch
.vcpus_running
);
2917 static void kvmppc_add_seg_page_size(struct kvm_ppc_one_seg_page_size
**sps
,
2920 struct mmu_psize_def
*def
= &mmu_psize_defs
[linux_psize
];
2924 (*sps
)->page_shift
= def
->shift
;
2925 (*sps
)->slb_enc
= def
->sllp
;
2926 (*sps
)->enc
[0].page_shift
= def
->shift
;
2927 (*sps
)->enc
[0].pte_enc
= def
->penc
[linux_psize
];
2929 * Add 16MB MPSS support if host supports it
2931 if (linux_psize
!= MMU_PAGE_16M
&& def
->penc
[MMU_PAGE_16M
] != -1) {
2932 (*sps
)->enc
[1].page_shift
= 24;
2933 (*sps
)->enc
[1].pte_enc
= def
->penc
[MMU_PAGE_16M
];
2938 static int kvm_vm_ioctl_get_smmu_info_hv(struct kvm
*kvm
,
2939 struct kvm_ppc_smmu_info
*info
)
2941 struct kvm_ppc_one_seg_page_size
*sps
;
2943 info
->flags
= KVM_PPC_PAGE_SIZES_REAL
;
2944 if (mmu_has_feature(MMU_FTR_1T_SEGMENT
))
2945 info
->flags
|= KVM_PPC_1T_SEGMENTS
;
2946 info
->slb_size
= mmu_slb_size
;
2948 /* We only support these sizes for now, and no muti-size segments */
2949 sps
= &info
->sps
[0];
2950 kvmppc_add_seg_page_size(&sps
, MMU_PAGE_4K
);
2951 kvmppc_add_seg_page_size(&sps
, MMU_PAGE_64K
);
2952 kvmppc_add_seg_page_size(&sps
, MMU_PAGE_16M
);
2958 * Get (and clear) the dirty memory log for a memory slot.
2960 static int kvm_vm_ioctl_get_dirty_log_hv(struct kvm
*kvm
,
2961 struct kvm_dirty_log
*log
)
2963 struct kvm_memslots
*slots
;
2964 struct kvm_memory_slot
*memslot
;
2968 mutex_lock(&kvm
->slots_lock
);
2971 if (log
->slot
>= KVM_USER_MEM_SLOTS
)
2974 slots
= kvm_memslots(kvm
);
2975 memslot
= id_to_memslot(slots
, log
->slot
);
2977 if (!memslot
->dirty_bitmap
)
2980 n
= kvm_dirty_bitmap_bytes(memslot
);
2981 memset(memslot
->dirty_bitmap
, 0, n
);
2983 r
= kvmppc_hv_get_dirty_log(kvm
, memslot
, memslot
->dirty_bitmap
);
2988 if (copy_to_user(log
->dirty_bitmap
, memslot
->dirty_bitmap
, n
))
2993 mutex_unlock(&kvm
->slots_lock
);
2997 static void kvmppc_core_free_memslot_hv(struct kvm_memory_slot
*free
,
2998 struct kvm_memory_slot
*dont
)
3000 if (!dont
|| free
->arch
.rmap
!= dont
->arch
.rmap
) {
3001 vfree(free
->arch
.rmap
);
3002 free
->arch
.rmap
= NULL
;
3006 static int kvmppc_core_create_memslot_hv(struct kvm_memory_slot
*slot
,
3007 unsigned long npages
)
3009 slot
->arch
.rmap
= vzalloc(npages
* sizeof(*slot
->arch
.rmap
));
3010 if (!slot
->arch
.rmap
)
3016 static int kvmppc_core_prepare_memory_region_hv(struct kvm
*kvm
,
3017 struct kvm_memory_slot
*memslot
,
3018 const struct kvm_userspace_memory_region
*mem
)
3023 static void kvmppc_core_commit_memory_region_hv(struct kvm
*kvm
,
3024 const struct kvm_userspace_memory_region
*mem
,
3025 const struct kvm_memory_slot
*old
,
3026 const struct kvm_memory_slot
*new)
3028 unsigned long npages
= mem
->memory_size
>> PAGE_SHIFT
;
3029 struct kvm_memslots
*slots
;
3030 struct kvm_memory_slot
*memslot
;
3033 * If we are making a new memslot, it might make
3034 * some address that was previously cached as emulated
3035 * MMIO be no longer emulated MMIO, so invalidate
3036 * all the caches of emulated MMIO translations.
3039 atomic64_inc(&kvm
->arch
.mmio_update
);
3041 if (npages
&& old
->npages
) {
3043 * If modifying a memslot, reset all the rmap dirty bits.
3044 * If this is a new memslot, we don't need to do anything
3045 * since the rmap array starts out as all zeroes,
3046 * i.e. no pages are dirty.
3048 slots
= kvm_memslots(kvm
);
3049 memslot
= id_to_memslot(slots
, mem
->slot
);
3050 kvmppc_hv_get_dirty_log(kvm
, memslot
, NULL
);
3055 * Update LPCR values in kvm->arch and in vcores.
3056 * Caller must hold kvm->lock.
3058 void kvmppc_update_lpcr(struct kvm
*kvm
, unsigned long lpcr
, unsigned long mask
)
3063 if ((kvm
->arch
.lpcr
& mask
) == lpcr
)
3066 kvm
->arch
.lpcr
= (kvm
->arch
.lpcr
& ~mask
) | lpcr
;
3068 for (i
= 0; i
< KVM_MAX_VCORES
; ++i
) {
3069 struct kvmppc_vcore
*vc
= kvm
->arch
.vcores
[i
];
3072 spin_lock(&vc
->lock
);
3073 vc
->lpcr
= (vc
->lpcr
& ~mask
) | lpcr
;
3074 spin_unlock(&vc
->lock
);
3075 if (++cores_done
>= kvm
->arch
.online_vcores
)
3080 static void kvmppc_mmu_destroy_hv(struct kvm_vcpu
*vcpu
)
3085 static void kvmppc_setup_partition_table(struct kvm
*kvm
)
3087 unsigned long dw0
, dw1
;
3089 /* PS field - page size for VRMA */
3090 dw0
= ((kvm
->arch
.vrma_slb_v
& SLB_VSID_L
) >> 1) |
3091 ((kvm
->arch
.vrma_slb_v
& SLB_VSID_LP
) << 1);
3092 /* HTABSIZE and HTABORG fields */
3093 dw0
|= kvm
->arch
.sdr1
;
3095 /* Second dword has GR=0; other fields are unused since UPRT=0 */
3098 mmu_partition_table_set_entry(kvm
->arch
.lpid
, dw0
, dw1
);
3101 static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu
*vcpu
)
3104 struct kvm
*kvm
= vcpu
->kvm
;
3106 struct kvm_memory_slot
*memslot
;
3107 struct vm_area_struct
*vma
;
3108 unsigned long lpcr
= 0, senc
;
3109 unsigned long psize
, porder
;
3112 mutex_lock(&kvm
->lock
);
3113 if (kvm
->arch
.hpte_setup_done
)
3114 goto out
; /* another vcpu beat us to it */
3116 /* Allocate hashed page table (if not done already) and reset it */
3117 if (!kvm
->arch
.hpt_virt
) {
3118 err
= kvmppc_alloc_hpt(kvm
, NULL
);
3120 pr_err("KVM: Couldn't alloc HPT\n");
3125 /* Look up the memslot for guest physical address 0 */
3126 srcu_idx
= srcu_read_lock(&kvm
->srcu
);
3127 memslot
= gfn_to_memslot(kvm
, 0);
3129 /* We must have some memory at 0 by now */
3131 if (!memslot
|| (memslot
->flags
& KVM_MEMSLOT_INVALID
))
3134 /* Look up the VMA for the start of this memory slot */
3135 hva
= memslot
->userspace_addr
;
3136 down_read(¤t
->mm
->mmap_sem
);
3137 vma
= find_vma(current
->mm
, hva
);
3138 if (!vma
|| vma
->vm_start
> hva
|| (vma
->vm_flags
& VM_IO
))
3141 psize
= vma_kernel_pagesize(vma
);
3142 porder
= __ilog2(psize
);
3144 up_read(¤t
->mm
->mmap_sem
);
3146 /* We can handle 4k, 64k or 16M pages in the VRMA */
3148 if (!(psize
== 0x1000 || psize
== 0x10000 ||
3149 psize
== 0x1000000))
3152 senc
= slb_pgsize_encoding(psize
);
3153 kvm
->arch
.vrma_slb_v
= senc
| SLB_VSID_B_1T
|
3154 (VRMA_VSID
<< SLB_VSID_SHIFT_1T
);
3155 /* Create HPTEs in the hash page table for the VRMA */
3156 kvmppc_map_vrma(vcpu
, memslot
, porder
);
3158 /* Update VRMASD field in the LPCR */
3159 if (!cpu_has_feature(CPU_FTR_ARCH_300
)) {
3160 /* the -4 is to account for senc values starting at 0x10 */
3161 lpcr
= senc
<< (LPCR_VRMASD_SH
- 4);
3162 kvmppc_update_lpcr(kvm
, lpcr
, LPCR_VRMASD
);
3164 kvmppc_setup_partition_table(kvm
);
3167 /* Order updates to kvm->arch.lpcr etc. vs. hpte_setup_done */
3169 kvm
->arch
.hpte_setup_done
= 1;
3172 srcu_read_unlock(&kvm
->srcu
, srcu_idx
);
3174 mutex_unlock(&kvm
->lock
);
3178 up_read(¤t
->mm
->mmap_sem
);
3182 #ifdef CONFIG_KVM_XICS
3184 * Allocate a per-core structure for managing state about which cores are
3185 * running in the host versus the guest and for exchanging data between
3186 * real mode KVM and CPU running in the host.
3187 * This is only done for the first VM.
3188 * The allocated structure stays even if all VMs have stopped.
3189 * It is only freed when the kvm-hv module is unloaded.
3190 * It's OK for this routine to fail, we just don't support host
3191 * core operations like redirecting H_IPI wakeups.
3193 void kvmppc_alloc_host_rm_ops(void)
3195 struct kvmppc_host_rm_ops
*ops
;
3196 unsigned long l_ops
;
3200 /* Not the first time here ? */
3201 if (kvmppc_host_rm_ops_hv
!= NULL
)
3204 ops
= kzalloc(sizeof(struct kvmppc_host_rm_ops
), GFP_KERNEL
);
3208 size
= cpu_nr_cores() * sizeof(struct kvmppc_host_rm_core
);
3209 ops
->rm_core
= kzalloc(size
, GFP_KERNEL
);
3211 if (!ops
->rm_core
) {
3218 for (cpu
= 0; cpu
< nr_cpu_ids
; cpu
+= threads_per_core
) {
3219 if (!cpu_online(cpu
))
3222 core
= cpu
>> threads_shift
;
3223 ops
->rm_core
[core
].rm_state
.in_host
= 1;
3226 ops
->vcpu_kick
= kvmppc_fast_vcpu_kick_hv
;
3229 * Make the contents of the kvmppc_host_rm_ops structure visible
3230 * to other CPUs before we assign it to the global variable.
3231 * Do an atomic assignment (no locks used here), but if someone
3232 * beats us to it, just free our copy and return.
3235 l_ops
= (unsigned long) ops
;
3237 if (cmpxchg64((unsigned long *)&kvmppc_host_rm_ops_hv
, 0, l_ops
)) {
3239 kfree(ops
->rm_core
);
3244 cpuhp_setup_state_nocalls(CPUHP_KVM_PPC_BOOK3S_PREPARE
,
3245 "ppc/kvm_book3s:prepare",
3246 kvmppc_set_host_core
,
3247 kvmppc_clear_host_core
);
3251 void kvmppc_free_host_rm_ops(void)
3253 if (kvmppc_host_rm_ops_hv
) {
3254 cpuhp_remove_state_nocalls(CPUHP_KVM_PPC_BOOK3S_PREPARE
);
3255 kfree(kvmppc_host_rm_ops_hv
->rm_core
);
3256 kfree(kvmppc_host_rm_ops_hv
);
3257 kvmppc_host_rm_ops_hv
= NULL
;
3262 static int kvmppc_core_init_vm_hv(struct kvm
*kvm
)
3264 unsigned long lpcr
, lpid
;
3267 /* Allocate the guest's logical partition ID */
3269 lpid
= kvmppc_alloc_lpid();
3272 kvm
->arch
.lpid
= lpid
;
3274 kvmppc_alloc_host_rm_ops();
3277 * Since we don't flush the TLB when tearing down a VM,
3278 * and this lpid might have previously been used,
3279 * make sure we flush on each core before running the new VM.
3280 * On POWER9, the tlbie in mmu_partition_table_set_entry()
3281 * does this flush for us.
3283 if (!cpu_has_feature(CPU_FTR_ARCH_300
))
3284 cpumask_setall(&kvm
->arch
.need_tlb_flush
);
3286 /* Start out with the default set of hcalls enabled */
3287 memcpy(kvm
->arch
.enabled_hcalls
, default_enabled_hcalls
,
3288 sizeof(kvm
->arch
.enabled_hcalls
));
3290 if (!cpu_has_feature(CPU_FTR_ARCH_300
))
3291 kvm
->arch
.host_sdr1
= mfspr(SPRN_SDR1
);
3293 /* Init LPCR for virtual RMA mode */
3294 kvm
->arch
.host_lpid
= mfspr(SPRN_LPID
);
3295 kvm
->arch
.host_lpcr
= lpcr
= mfspr(SPRN_LPCR
);
3296 lpcr
&= LPCR_PECE
| LPCR_LPES
;
3297 lpcr
|= (4UL << LPCR_DPFD_SH
) | LPCR_HDICE
|
3298 LPCR_VPM0
| LPCR_VPM1
;
3299 kvm
->arch
.vrma_slb_v
= SLB_VSID_B_1T
|
3300 (VRMA_VSID
<< SLB_VSID_SHIFT_1T
);
3301 /* On POWER8 turn on online bit to enable PURR/SPURR */
3302 if (cpu_has_feature(CPU_FTR_ARCH_207S
))
3305 * On POWER9, VPM0 bit is reserved (VPM0=1 behaviour is assumed)
3306 * Set HVICE bit to enable hypervisor virtualization interrupts.
3308 if (cpu_has_feature(CPU_FTR_ARCH_300
)) {
3313 kvm
->arch
.lpcr
= lpcr
;
3316 * Work out how many sets the TLB has, for the use of
3317 * the TLB invalidation loop in book3s_hv_rmhandlers.S.
3319 if (cpu_has_feature(CPU_FTR_ARCH_300
))
3320 kvm
->arch
.tlb_sets
= POWER9_TLB_SETS_HASH
; /* 256 */
3321 else if (cpu_has_feature(CPU_FTR_ARCH_207S
))
3322 kvm
->arch
.tlb_sets
= POWER8_TLB_SETS
; /* 512 */
3324 kvm
->arch
.tlb_sets
= POWER7_TLB_SETS
; /* 128 */
3327 * Track that we now have a HV mode VM active. This blocks secondary
3328 * CPU threads from coming online.
3330 kvm_hv_vm_activated();
3333 * Create a debugfs directory for the VM
3335 snprintf(buf
, sizeof(buf
), "vm%d", current
->pid
);
3336 kvm
->arch
.debugfs_dir
= debugfs_create_dir(buf
, kvm_debugfs_dir
);
3337 if (!IS_ERR_OR_NULL(kvm
->arch
.debugfs_dir
))
3338 kvmppc_mmu_debugfs_init(kvm
);
3343 static void kvmppc_free_vcores(struct kvm
*kvm
)
3347 for (i
= 0; i
< KVM_MAX_VCORES
; ++i
)
3348 kfree(kvm
->arch
.vcores
[i
]);
3349 kvm
->arch
.online_vcores
= 0;
3352 static void kvmppc_core_destroy_vm_hv(struct kvm
*kvm
)
3354 debugfs_remove_recursive(kvm
->arch
.debugfs_dir
);
3356 kvm_hv_vm_deactivated();
3358 kvmppc_free_vcores(kvm
);
3360 kvmppc_free_hpt(kvm
);
3362 kvmppc_free_pimap(kvm
);
3365 /* We don't need to emulate any privileged instructions or dcbz */
3366 static int kvmppc_core_emulate_op_hv(struct kvm_run
*run
, struct kvm_vcpu
*vcpu
,
3367 unsigned int inst
, int *advance
)
3369 return EMULATE_FAIL
;
3372 static int kvmppc_core_emulate_mtspr_hv(struct kvm_vcpu
*vcpu
, int sprn
,
3375 return EMULATE_FAIL
;
3378 static int kvmppc_core_emulate_mfspr_hv(struct kvm_vcpu
*vcpu
, int sprn
,
3381 return EMULATE_FAIL
;
3384 static int kvmppc_core_check_processor_compat_hv(void)
3386 if (!cpu_has_feature(CPU_FTR_HVMODE
) ||
3387 !cpu_has_feature(CPU_FTR_ARCH_206
))
3390 * Disable KVM for Power9 in radix mode.
3392 if (cpu_has_feature(CPU_FTR_ARCH_300
) && radix_enabled())
3398 #ifdef CONFIG_KVM_XICS
3400 void kvmppc_free_pimap(struct kvm
*kvm
)
3402 kfree(kvm
->arch
.pimap
);
3405 static struct kvmppc_passthru_irqmap
*kvmppc_alloc_pimap(void)
3407 return kzalloc(sizeof(struct kvmppc_passthru_irqmap
), GFP_KERNEL
);
3410 static int kvmppc_set_passthru_irq(struct kvm
*kvm
, int host_irq
, int guest_gsi
)
3412 struct irq_desc
*desc
;
3413 struct kvmppc_irq_map
*irq_map
;
3414 struct kvmppc_passthru_irqmap
*pimap
;
3415 struct irq_chip
*chip
;
3418 if (!kvm_irq_bypass
)
3421 desc
= irq_to_desc(host_irq
);
3425 mutex_lock(&kvm
->lock
);
3427 pimap
= kvm
->arch
.pimap
;
3428 if (pimap
== NULL
) {
3429 /* First call, allocate structure to hold IRQ map */
3430 pimap
= kvmppc_alloc_pimap();
3431 if (pimap
== NULL
) {
3432 mutex_unlock(&kvm
->lock
);
3435 kvm
->arch
.pimap
= pimap
;
3439 * For now, we only support interrupts for which the EOI operation
3440 * is an OPAL call followed by a write to XIRR, since that's
3441 * what our real-mode EOI code does.
3443 chip
= irq_data_get_irq_chip(&desc
->irq_data
);
3444 if (!chip
|| !is_pnv_opal_msi(chip
)) {
3445 pr_warn("kvmppc_set_passthru_irq_hv: Could not assign IRQ map for (%d,%d)\n",
3446 host_irq
, guest_gsi
);
3447 mutex_unlock(&kvm
->lock
);
3452 * See if we already have an entry for this guest IRQ number.
3453 * If it's mapped to a hardware IRQ number, that's an error,
3454 * otherwise re-use this entry.
3456 for (i
= 0; i
< pimap
->n_mapped
; i
++) {
3457 if (guest_gsi
== pimap
->mapped
[i
].v_hwirq
) {
3458 if (pimap
->mapped
[i
].r_hwirq
) {
3459 mutex_unlock(&kvm
->lock
);
3466 if (i
== KVMPPC_PIRQ_MAPPED
) {
3467 mutex_unlock(&kvm
->lock
);
3468 return -EAGAIN
; /* table is full */
3471 irq_map
= &pimap
->mapped
[i
];
3473 irq_map
->v_hwirq
= guest_gsi
;
3474 irq_map
->desc
= desc
;
3477 * Order the above two stores before the next to serialize with
3478 * the KVM real mode handler.
3481 irq_map
->r_hwirq
= desc
->irq_data
.hwirq
;
3483 if (i
== pimap
->n_mapped
)
3486 kvmppc_xics_set_mapped(kvm
, guest_gsi
, desc
->irq_data
.hwirq
);
3488 mutex_unlock(&kvm
->lock
);
3493 static int kvmppc_clr_passthru_irq(struct kvm
*kvm
, int host_irq
, int guest_gsi
)
3495 struct irq_desc
*desc
;
3496 struct kvmppc_passthru_irqmap
*pimap
;
3499 if (!kvm_irq_bypass
)
3502 desc
= irq_to_desc(host_irq
);
3506 mutex_lock(&kvm
->lock
);
3508 if (kvm
->arch
.pimap
== NULL
) {
3509 mutex_unlock(&kvm
->lock
);
3512 pimap
= kvm
->arch
.pimap
;
3514 for (i
= 0; i
< pimap
->n_mapped
; i
++) {
3515 if (guest_gsi
== pimap
->mapped
[i
].v_hwirq
)
3519 if (i
== pimap
->n_mapped
) {
3520 mutex_unlock(&kvm
->lock
);
3524 kvmppc_xics_clr_mapped(kvm
, guest_gsi
, pimap
->mapped
[i
].r_hwirq
);
3526 /* invalidate the entry */
3527 pimap
->mapped
[i
].r_hwirq
= 0;
3530 * We don't free this structure even when the count goes to
3531 * zero. The structure is freed when we destroy the VM.
3534 mutex_unlock(&kvm
->lock
);
3538 static int kvmppc_irq_bypass_add_producer_hv(struct irq_bypass_consumer
*cons
,
3539 struct irq_bypass_producer
*prod
)
3542 struct kvm_kernel_irqfd
*irqfd
=
3543 container_of(cons
, struct kvm_kernel_irqfd
, consumer
);
3545 irqfd
->producer
= prod
;
3547 ret
= kvmppc_set_passthru_irq(irqfd
->kvm
, prod
->irq
, irqfd
->gsi
);
3549 pr_info("kvmppc_set_passthru_irq (irq %d, gsi %d) fails: %d\n",
3550 prod
->irq
, irqfd
->gsi
, ret
);
3555 static void kvmppc_irq_bypass_del_producer_hv(struct irq_bypass_consumer
*cons
,
3556 struct irq_bypass_producer
*prod
)
3559 struct kvm_kernel_irqfd
*irqfd
=
3560 container_of(cons
, struct kvm_kernel_irqfd
, consumer
);
3562 irqfd
->producer
= NULL
;
3565 * When producer of consumer is unregistered, we change back to
3566 * default external interrupt handling mode - KVM real mode
3567 * will switch back to host.
3569 ret
= kvmppc_clr_passthru_irq(irqfd
->kvm
, prod
->irq
, irqfd
->gsi
);
3571 pr_warn("kvmppc_clr_passthru_irq (irq %d, gsi %d) fails: %d\n",
3572 prod
->irq
, irqfd
->gsi
, ret
);
3576 static long kvm_arch_vm_ioctl_hv(struct file
*filp
,
3577 unsigned int ioctl
, unsigned long arg
)
3579 struct kvm
*kvm __maybe_unused
= filp
->private_data
;
3580 void __user
*argp
= (void __user
*)arg
;
3585 case KVM_PPC_ALLOCATE_HTAB
: {
3589 if (get_user(htab_order
, (u32 __user
*)argp
))
3591 r
= kvmppc_alloc_reset_hpt(kvm
, &htab_order
);
3595 if (put_user(htab_order
, (u32 __user
*)argp
))
3601 case KVM_PPC_GET_HTAB_FD
: {
3602 struct kvm_get_htab_fd ghf
;
3605 if (copy_from_user(&ghf
, argp
, sizeof(ghf
)))
3607 r
= kvm_vm_ioctl_get_htab_fd(kvm
, &ghf
);
3619 * List of hcall numbers to enable by default.
3620 * For compatibility with old userspace, we enable by default
3621 * all hcalls that were implemented before the hcall-enabling
3622 * facility was added. Note this list should not include H_RTAS.
3624 static unsigned int default_hcall_list
[] = {
3638 #ifdef CONFIG_KVM_XICS
3649 static void init_default_hcalls(void)
3654 for (i
= 0; default_hcall_list
[i
]; ++i
) {
3655 hcall
= default_hcall_list
[i
];
3656 WARN_ON(!kvmppc_hcall_impl_hv(hcall
));
3657 __set_bit(hcall
/ 4, default_enabled_hcalls
);
3661 static struct kvmppc_ops kvm_ops_hv
= {
3662 .get_sregs
= kvm_arch_vcpu_ioctl_get_sregs_hv
,
3663 .set_sregs
= kvm_arch_vcpu_ioctl_set_sregs_hv
,
3664 .get_one_reg
= kvmppc_get_one_reg_hv
,
3665 .set_one_reg
= kvmppc_set_one_reg_hv
,
3666 .vcpu_load
= kvmppc_core_vcpu_load_hv
,
3667 .vcpu_put
= kvmppc_core_vcpu_put_hv
,
3668 .set_msr
= kvmppc_set_msr_hv
,
3669 .vcpu_run
= kvmppc_vcpu_run_hv
,
3670 .vcpu_create
= kvmppc_core_vcpu_create_hv
,
3671 .vcpu_free
= kvmppc_core_vcpu_free_hv
,
3672 .check_requests
= kvmppc_core_check_requests_hv
,
3673 .get_dirty_log
= kvm_vm_ioctl_get_dirty_log_hv
,
3674 .flush_memslot
= kvmppc_core_flush_memslot_hv
,
3675 .prepare_memory_region
= kvmppc_core_prepare_memory_region_hv
,
3676 .commit_memory_region
= kvmppc_core_commit_memory_region_hv
,
3677 .unmap_hva
= kvm_unmap_hva_hv
,
3678 .unmap_hva_range
= kvm_unmap_hva_range_hv
,
3679 .age_hva
= kvm_age_hva_hv
,
3680 .test_age_hva
= kvm_test_age_hva_hv
,
3681 .set_spte_hva
= kvm_set_spte_hva_hv
,
3682 .mmu_destroy
= kvmppc_mmu_destroy_hv
,
3683 .free_memslot
= kvmppc_core_free_memslot_hv
,
3684 .create_memslot
= kvmppc_core_create_memslot_hv
,
3685 .init_vm
= kvmppc_core_init_vm_hv
,
3686 .destroy_vm
= kvmppc_core_destroy_vm_hv
,
3687 .get_smmu_info
= kvm_vm_ioctl_get_smmu_info_hv
,
3688 .emulate_op
= kvmppc_core_emulate_op_hv
,
3689 .emulate_mtspr
= kvmppc_core_emulate_mtspr_hv
,
3690 .emulate_mfspr
= kvmppc_core_emulate_mfspr_hv
,
3691 .fast_vcpu_kick
= kvmppc_fast_vcpu_kick_hv
,
3692 .arch_vm_ioctl
= kvm_arch_vm_ioctl_hv
,
3693 .hcall_implemented
= kvmppc_hcall_impl_hv
,
3694 #ifdef CONFIG_KVM_XICS
3695 .irq_bypass_add_producer
= kvmppc_irq_bypass_add_producer_hv
,
3696 .irq_bypass_del_producer
= kvmppc_irq_bypass_del_producer_hv
,
3700 static int kvm_init_subcore_bitmap(void)
3703 int nr_cores
= cpu_nr_cores();
3704 struct sibling_subcore_state
*sibling_subcore_state
;
3706 for (i
= 0; i
< nr_cores
; i
++) {
3707 int first_cpu
= i
* threads_per_core
;
3708 int node
= cpu_to_node(first_cpu
);
3710 /* Ignore if it is already allocated. */
3711 if (paca
[first_cpu
].sibling_subcore_state
)
3714 sibling_subcore_state
=
3715 kmalloc_node(sizeof(struct sibling_subcore_state
),
3717 if (!sibling_subcore_state
)
3720 memset(sibling_subcore_state
, 0,
3721 sizeof(struct sibling_subcore_state
));
3723 for (j
= 0; j
< threads_per_core
; j
++) {
3724 int cpu
= first_cpu
+ j
;
3726 paca
[cpu
].sibling_subcore_state
= sibling_subcore_state
;
3732 static int kvmppc_book3s_init_hv(void)
3736 * FIXME!! Do we need to check on all cpus ?
3738 r
= kvmppc_core_check_processor_compat_hv();
3742 r
= kvm_init_subcore_bitmap();
3747 * We need a way of accessing the XICS interrupt controller,
3748 * either directly, via paca[cpu].kvm_hstate.xics_phys, or
3749 * indirectly, via OPAL.
3752 if (!get_paca()->kvm_hstate
.xics_phys
) {
3753 struct device_node
*np
;
3755 np
= of_find_compatible_node(NULL
, NULL
, "ibm,opal-intc");
3757 pr_err("KVM-HV: Cannot determine method for accessing XICS\n");
3763 kvm_ops_hv
.owner
= THIS_MODULE
;
3764 kvmppc_hv_ops
= &kvm_ops_hv
;
3766 init_default_hcalls();
3770 r
= kvmppc_mmu_hv_init();
3774 static void kvmppc_book3s_exit_hv(void)
3776 kvmppc_free_host_rm_ops();
3777 kvmppc_hv_ops
= NULL
;
3780 module_init(kvmppc_book3s_init_hv
);
3781 module_exit(kvmppc_book3s_exit_hv
);
3782 MODULE_LICENSE("GPL");
3783 MODULE_ALIAS_MISCDEV(KVM_MINOR
);
3784 MODULE_ALIAS("devname:kvm");