1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright 2011 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com>
4 * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved.
7 * Paul Mackerras <paulus@au1.ibm.com>
8 * Alexander Graf <agraf@suse.de>
9 * Kevin Wolf <mail@kevin-wolf.de>
11 * Description: KVM functions specific to running on Book 3S
12 * processors in hypervisor mode (specifically POWER7 and later).
14 * This file is derived from arch/powerpc/kvm/book3s.c,
15 * by Alexander Graf <agraf@suse.de>.
18 #include <linux/kvm_host.h>
19 #include <linux/kernel.h>
20 #include <linux/err.h>
21 #include <linux/slab.h>
22 #include <linux/preempt.h>
23 #include <linux/sched/signal.h>
24 #include <linux/sched/stat.h>
25 #include <linux/delay.h>
26 #include <linux/export.h>
28 #include <linux/anon_inodes.h>
29 #include <linux/cpu.h>
30 #include <linux/cpumask.h>
31 #include <linux/spinlock.h>
32 #include <linux/page-flags.h>
33 #include <linux/srcu.h>
34 #include <linux/miscdevice.h>
35 #include <linux/debugfs.h>
36 #include <linux/gfp.h>
37 #include <linux/vmalloc.h>
38 #include <linux/highmem.h>
39 #include <linux/hugetlb.h>
40 #include <linux/kvm_irqfd.h>
41 #include <linux/irqbypass.h>
42 #include <linux/module.h>
43 #include <linux/compiler.h>
46 #include <asm/ftrace.h>
48 #include <asm/ppc-opcode.h>
49 #include <asm/asm-prototypes.h>
50 #include <asm/archrandom.h>
51 #include <asm/debug.h>
52 #include <asm/disassemble.h>
53 #include <asm/cputable.h>
54 #include <asm/cacheflush.h>
55 #include <linux/uaccess.h>
57 #include <asm/kvm_ppc.h>
58 #include <asm/kvm_book3s.h>
59 #include <asm/mmu_context.h>
60 #include <asm/lppaca.h>
61 #include <asm/processor.h>
62 #include <asm/cputhreads.h>
64 #include <asm/hvcall.h>
65 #include <asm/switch_to.h>
67 #include <asm/dbell.h>
69 #include <asm/pnv-pci.h>
74 #include <asm/hw_breakpoint.h>
75 #include <asm/kvm_book3s_uvmem.h>
76 #include <asm/ultravisor.h>
81 #define CREATE_TRACE_POINTS
84 /* #define EXIT_DEBUG */
85 /* #define EXIT_DEBUG_SIMPLE */
86 /* #define EXIT_DEBUG_INT */
88 /* Used to indicate that a guest page fault needs to be handled */
89 #define RESUME_PAGE_FAULT (RESUME_GUEST | RESUME_FLAG_ARCH1)
90 /* Used to indicate that a guest passthrough interrupt needs to be handled */
91 #define RESUME_PASSTHROUGH (RESUME_GUEST | RESUME_FLAG_ARCH2)
93 /* Used as a "null" value for timebase values */
94 #define TB_NIL (~(u64)0)
96 static DECLARE_BITMAP(default_enabled_hcalls, MAX_HCALL_OPCODE/4 + 1);
98 static int dynamic_mt_modes = 6;
99 module_param(dynamic_mt_modes, int, 0644);
100 MODULE_PARM_DESC(dynamic_mt_modes, "Set of allowed dynamic micro-threading modes: 0 (= none), 2, 4, or 6 (= 2 or 4)");
101 static int target_smt_mode;
102 module_param(target_smt_mode, int, 0644);
103 MODULE_PARM_DESC(target_smt_mode, "Target threads per core (0 = max)");
105 static bool indep_threads_mode = true;
106 module_param(indep_threads_mode, bool, S_IRUGO | S_IWUSR);
107 MODULE_PARM_DESC(indep_threads_mode, "Independent-threads mode (only on POWER9)");
109 static bool one_vm_per_core;
110 module_param(one_vm_per_core, bool, S_IRUGO | S_IWUSR);
111 MODULE_PARM_DESC(one_vm_per_core, "Only run vCPUs from the same VM on a core (requires indep_threads_mode=N)");
113 #ifdef CONFIG_KVM_XICS
114 static const struct kernel_param_ops module_param_ops = {
115 .set = param_set_int,
116 .get = param_get_int,
119 module_param_cb(kvm_irq_bypass, &module_param_ops, &kvm_irq_bypass, 0644);
120 MODULE_PARM_DESC(kvm_irq_bypass, "Bypass passthrough interrupt optimization");
122 module_param_cb(h_ipi_redirect, &module_param_ops, &h_ipi_redirect, 0644);
123 MODULE_PARM_DESC(h_ipi_redirect, "Redirect H_IPI wakeup to a free host core");
126 /* If set, guests are allowed to create and control nested guests */
127 static bool nested = true;
128 module_param(nested, bool, S_IRUGO | S_IWUSR);
129 MODULE_PARM_DESC(nested, "Enable nested virtualization (only on POWER9)");
131 static inline bool nesting_enabled(struct kvm *kvm)
133 return kvm->arch.nested_enable && kvm_is_radix(kvm);
136 /* If set, the threads on each CPU core have to be in the same MMU mode */
137 static bool no_mixing_hpt_and_radix __read_mostly;
139 static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu);
142 * RWMR values for POWER8. These control the rate at which PURR
143 * and SPURR count and should be set according to the number of
144 * online threads in the vcore being run.
146 #define RWMR_RPA_P8_1THREAD 0x164520C62609AECAUL
147 #define RWMR_RPA_P8_2THREAD 0x7FFF2908450D8DA9UL
148 #define RWMR_RPA_P8_3THREAD 0x164520C62609AECAUL
149 #define RWMR_RPA_P8_4THREAD 0x199A421245058DA9UL
150 #define RWMR_RPA_P8_5THREAD 0x164520C62609AECAUL
151 #define RWMR_RPA_P8_6THREAD 0x164520C62609AECAUL
152 #define RWMR_RPA_P8_7THREAD 0x164520C62609AECAUL
153 #define RWMR_RPA_P8_8THREAD 0x164520C62609AECAUL
155 static unsigned long p8_rwmr_values[MAX_SMT_THREADS + 1] = {
167 static inline struct kvm_vcpu *next_runnable_thread(struct kvmppc_vcore *vc,
171 struct kvm_vcpu *vcpu;
173 while (++i < MAX_SMT_THREADS) {
174 vcpu = READ_ONCE(vc->runnable_threads[i]);
183 /* Used to traverse the list of runnable threads for a given vcore */
184 #define for_each_runnable_thread(i, vcpu, vc) \
185 for (i = -1; (vcpu = next_runnable_thread(vc, &i)); )
187 static bool kvmppc_ipi_thread(int cpu)
189 unsigned long msg = PPC_DBELL_TYPE(PPC_DBELL_SERVER);
191 /* If we're a nested hypervisor, fall back to ordinary IPIs for now */
192 if (kvmhv_on_pseries())
195 /* On POWER9 we can use msgsnd to IPI any cpu */
196 if (cpu_has_feature(CPU_FTR_ARCH_300)) {
197 msg |= get_hard_smp_processor_id(cpu);
199 __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
203 /* On POWER8 for IPIs to threads in the same core, use msgsnd */
204 if (cpu_has_feature(CPU_FTR_ARCH_207S)) {
206 if (cpu_first_thread_sibling(cpu) ==
207 cpu_first_thread_sibling(smp_processor_id())) {
208 msg |= cpu_thread_in_core(cpu);
210 __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
217 #if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP)
218 if (cpu >= 0 && cpu < nr_cpu_ids) {
219 if (paca_ptrs[cpu]->kvm_hstate.xics_phys) {
223 opal_int_set_mfrr(get_hard_smp_processor_id(cpu), IPI_PRIORITY);
231 static void kvmppc_fast_vcpu_kick_hv(struct kvm_vcpu *vcpu)
234 struct rcuwait *waitp;
236 waitp = kvm_arch_vcpu_get_wait(vcpu);
237 if (rcuwait_wake_up(waitp))
238 ++vcpu->stat.halt_wakeup;
240 cpu = READ_ONCE(vcpu->arch.thread_cpu);
241 if (cpu >= 0 && kvmppc_ipi_thread(cpu))
244 /* CPU points to the first thread of the core */
246 if (cpu >= 0 && cpu < nr_cpu_ids && cpu_online(cpu))
247 smp_send_reschedule(cpu);
251 * We use the vcpu_load/put functions to measure stolen time.
252 * Stolen time is counted as time when either the vcpu is able to
253 * run as part of a virtual core, but the task running the vcore
254 * is preempted or sleeping, or when the vcpu needs something done
255 * in the kernel by the task running the vcpu, but that task is
256 * preempted or sleeping. Those two things have to be counted
257 * separately, since one of the vcpu tasks will take on the job
258 * of running the core, and the other vcpu tasks in the vcore will
259 * sleep waiting for it to do that, but that sleep shouldn't count
262 * Hence we accumulate stolen time when the vcpu can run as part of
263 * a vcore using vc->stolen_tb, and the stolen time when the vcpu
264 * needs its task to do other things in the kernel (for example,
265 * service a page fault) in busy_stolen. We don't accumulate
266 * stolen time for a vcore when it is inactive, or for a vcpu
267 * when it is in state RUNNING or NOTREADY. NOTREADY is a bit of
268 * a misnomer; it means that the vcpu task is not executing in
269 * the KVM_VCPU_RUN ioctl, i.e. it is in userspace or elsewhere in
270 * the kernel. We don't have any way of dividing up that time
271 * between time that the vcpu is genuinely stopped, time that
272 * the task is actively working on behalf of the vcpu, and time
273 * that the task is preempted, so we don't count any of it as
276 * Updates to busy_stolen are protected by arch.tbacct_lock;
277 * updates to vc->stolen_tb are protected by the vcore->stoltb_lock
278 * lock. The stolen times are measured in units of timebase ticks.
279 * (Note that the != TB_NIL checks below are purely defensive;
280 * they should never fail.)
283 static void kvmppc_core_start_stolen(struct kvmppc_vcore *vc)
287 spin_lock_irqsave(&vc->stoltb_lock, flags);
288 vc->preempt_tb = mftb();
289 spin_unlock_irqrestore(&vc->stoltb_lock, flags);
292 static void kvmppc_core_end_stolen(struct kvmppc_vcore *vc)
296 spin_lock_irqsave(&vc->stoltb_lock, flags);
297 if (vc->preempt_tb != TB_NIL) {
298 vc->stolen_tb += mftb() - vc->preempt_tb;
299 vc->preempt_tb = TB_NIL;
301 spin_unlock_irqrestore(&vc->stoltb_lock, flags);
304 static void kvmppc_core_vcpu_load_hv(struct kvm_vcpu *vcpu, int cpu)
306 struct kvmppc_vcore *vc = vcpu->arch.vcore;
310 * We can test vc->runner without taking the vcore lock,
311 * because only this task ever sets vc->runner to this
312 * vcpu, and once it is set to this vcpu, only this task
313 * ever sets it to NULL.
315 if (vc->runner == vcpu && vc->vcore_state >= VCORE_SLEEPING)
316 kvmppc_core_end_stolen(vc);
318 spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags);
319 if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST &&
320 vcpu->arch.busy_preempt != TB_NIL) {
321 vcpu->arch.busy_stolen += mftb() - vcpu->arch.busy_preempt;
322 vcpu->arch.busy_preempt = TB_NIL;
324 spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags);
327 static void kvmppc_core_vcpu_put_hv(struct kvm_vcpu *vcpu)
329 struct kvmppc_vcore *vc = vcpu->arch.vcore;
332 if (vc->runner == vcpu && vc->vcore_state >= VCORE_SLEEPING)
333 kvmppc_core_start_stolen(vc);
335 spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags);
336 if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST)
337 vcpu->arch.busy_preempt = mftb();
338 spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags);
341 static void kvmppc_set_pvr_hv(struct kvm_vcpu *vcpu, u32 pvr)
343 vcpu->arch.pvr = pvr;
346 /* Dummy value used in computing PCR value below */
347 #define PCR_ARCH_31 (PCR_ARCH_300 << 1)
349 static int kvmppc_set_arch_compat(struct kvm_vcpu *vcpu, u32 arch_compat)
351 unsigned long host_pcr_bit = 0, guest_pcr_bit = 0;
352 struct kvmppc_vcore *vc = vcpu->arch.vcore;
354 /* We can (emulate) our own architecture version and anything older */
355 if (cpu_has_feature(CPU_FTR_ARCH_31))
356 host_pcr_bit = PCR_ARCH_31;
357 else if (cpu_has_feature(CPU_FTR_ARCH_300))
358 host_pcr_bit = PCR_ARCH_300;
359 else if (cpu_has_feature(CPU_FTR_ARCH_207S))
360 host_pcr_bit = PCR_ARCH_207;
361 else if (cpu_has_feature(CPU_FTR_ARCH_206))
362 host_pcr_bit = PCR_ARCH_206;
364 host_pcr_bit = PCR_ARCH_205;
366 /* Determine lowest PCR bit needed to run guest in given PVR level */
367 guest_pcr_bit = host_pcr_bit;
369 switch (arch_compat) {
371 guest_pcr_bit = PCR_ARCH_205;
375 guest_pcr_bit = PCR_ARCH_206;
378 guest_pcr_bit = PCR_ARCH_207;
381 guest_pcr_bit = PCR_ARCH_300;
384 guest_pcr_bit = PCR_ARCH_31;
391 /* Check requested PCR bits don't exceed our capabilities */
392 if (guest_pcr_bit > host_pcr_bit)
395 spin_lock(&vc->lock);
396 vc->arch_compat = arch_compat;
398 * Set all PCR bits for which guest_pcr_bit <= bit < host_pcr_bit
399 * Also set all reserved PCR bits
401 vc->pcr = (host_pcr_bit - guest_pcr_bit) | PCR_MASK;
402 spin_unlock(&vc->lock);
407 static void kvmppc_dump_regs(struct kvm_vcpu *vcpu)
411 pr_err("vcpu %p (%d):\n", vcpu, vcpu->vcpu_id);
412 pr_err("pc = %.16lx msr = %.16llx trap = %x\n",
413 vcpu->arch.regs.nip, vcpu->arch.shregs.msr, vcpu->arch.trap);
414 for (r = 0; r < 16; ++r)
415 pr_err("r%2d = %.16lx r%d = %.16lx\n",
416 r, kvmppc_get_gpr(vcpu, r),
417 r+16, kvmppc_get_gpr(vcpu, r+16));
418 pr_err("ctr = %.16lx lr = %.16lx\n",
419 vcpu->arch.regs.ctr, vcpu->arch.regs.link);
420 pr_err("srr0 = %.16llx srr1 = %.16llx\n",
421 vcpu->arch.shregs.srr0, vcpu->arch.shregs.srr1);
422 pr_err("sprg0 = %.16llx sprg1 = %.16llx\n",
423 vcpu->arch.shregs.sprg0, vcpu->arch.shregs.sprg1);
424 pr_err("sprg2 = %.16llx sprg3 = %.16llx\n",
425 vcpu->arch.shregs.sprg2, vcpu->arch.shregs.sprg3);
426 pr_err("cr = %.8lx xer = %.16lx dsisr = %.8x\n",
427 vcpu->arch.regs.ccr, vcpu->arch.regs.xer, vcpu->arch.shregs.dsisr);
428 pr_err("dar = %.16llx\n", vcpu->arch.shregs.dar);
429 pr_err("fault dar = %.16lx dsisr = %.8x\n",
430 vcpu->arch.fault_dar, vcpu->arch.fault_dsisr);
431 pr_err("SLB (%d entries):\n", vcpu->arch.slb_max);
432 for (r = 0; r < vcpu->arch.slb_max; ++r)
433 pr_err(" ESID = %.16llx VSID = %.16llx\n",
434 vcpu->arch.slb[r].orige, vcpu->arch.slb[r].origv);
435 pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n",
436 vcpu->arch.vcore->lpcr, vcpu->kvm->arch.sdr1,
437 vcpu->arch.last_inst);
440 static struct kvm_vcpu *kvmppc_find_vcpu(struct kvm *kvm, int id)
442 return kvm_get_vcpu_by_id(kvm, id);
445 static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa)
447 vpa->__old_status |= LPPACA_OLD_SHARED_PROC;
448 vpa->yield_count = cpu_to_be32(1);
451 static int set_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *v,
452 unsigned long addr, unsigned long len)
454 /* check address is cacheline aligned */
455 if (addr & (L1_CACHE_BYTES - 1))
457 spin_lock(&vcpu->arch.vpa_update_lock);
458 if (v->next_gpa != addr || v->len != len) {
460 v->len = addr ? len : 0;
461 v->update_pending = 1;
463 spin_unlock(&vcpu->arch.vpa_update_lock);
467 /* Length for a per-processor buffer is passed in at offset 4 in the buffer */
476 static int vpa_is_registered(struct kvmppc_vpa *vpap)
478 if (vpap->update_pending)
479 return vpap->next_gpa != 0;
480 return vpap->pinned_addr != NULL;
483 static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu,
485 unsigned long vcpuid, unsigned long vpa)
487 struct kvm *kvm = vcpu->kvm;
488 unsigned long len, nb;
490 struct kvm_vcpu *tvcpu;
493 struct kvmppc_vpa *vpap;
495 tvcpu = kvmppc_find_vcpu(kvm, vcpuid);
499 subfunc = (flags >> H_VPA_FUNC_SHIFT) & H_VPA_FUNC_MASK;
500 if (subfunc == H_VPA_REG_VPA || subfunc == H_VPA_REG_DTL ||
501 subfunc == H_VPA_REG_SLB) {
502 /* Registering new area - address must be cache-line aligned */
503 if ((vpa & (L1_CACHE_BYTES - 1)) || !vpa)
506 /* convert logical addr to kernel addr and read length */
507 va = kvmppc_pin_guest_page(kvm, vpa, &nb);
510 if (subfunc == H_VPA_REG_VPA)
511 len = be16_to_cpu(((struct reg_vpa *)va)->length.hword);
513 len = be32_to_cpu(((struct reg_vpa *)va)->length.word);
514 kvmppc_unpin_guest_page(kvm, va, vpa, false);
517 if (len > nb || len < sizeof(struct reg_vpa))
526 spin_lock(&tvcpu->arch.vpa_update_lock);
529 case H_VPA_REG_VPA: /* register VPA */
531 * The size of our lppaca is 1kB because of the way we align
532 * it for the guest to avoid crossing a 4kB boundary. We only
533 * use 640 bytes of the structure though, so we should accept
534 * clients that set a size of 640.
536 BUILD_BUG_ON(sizeof(struct lppaca) != 640);
537 if (len < sizeof(struct lppaca))
539 vpap = &tvcpu->arch.vpa;
543 case H_VPA_REG_DTL: /* register DTL */
544 if (len < sizeof(struct dtl_entry))
546 len -= len % sizeof(struct dtl_entry);
548 /* Check that they have previously registered a VPA */
550 if (!vpa_is_registered(&tvcpu->arch.vpa))
553 vpap = &tvcpu->arch.dtl;
557 case H_VPA_REG_SLB: /* register SLB shadow buffer */
558 /* Check that they have previously registered a VPA */
560 if (!vpa_is_registered(&tvcpu->arch.vpa))
563 vpap = &tvcpu->arch.slb_shadow;
567 case H_VPA_DEREG_VPA: /* deregister VPA */
568 /* Check they don't still have a DTL or SLB buf registered */
570 if (vpa_is_registered(&tvcpu->arch.dtl) ||
571 vpa_is_registered(&tvcpu->arch.slb_shadow))
574 vpap = &tvcpu->arch.vpa;
578 case H_VPA_DEREG_DTL: /* deregister DTL */
579 vpap = &tvcpu->arch.dtl;
583 case H_VPA_DEREG_SLB: /* deregister SLB shadow buffer */
584 vpap = &tvcpu->arch.slb_shadow;
590 vpap->next_gpa = vpa;
592 vpap->update_pending = 1;
595 spin_unlock(&tvcpu->arch.vpa_update_lock);
600 static void kvmppc_update_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *vpap)
602 struct kvm *kvm = vcpu->kvm;
608 * We need to pin the page pointed to by vpap->next_gpa,
609 * but we can't call kvmppc_pin_guest_page under the lock
610 * as it does get_user_pages() and down_read(). So we
611 * have to drop the lock, pin the page, then get the lock
612 * again and check that a new area didn't get registered
616 gpa = vpap->next_gpa;
617 spin_unlock(&vcpu->arch.vpa_update_lock);
621 va = kvmppc_pin_guest_page(kvm, gpa, &nb);
622 spin_lock(&vcpu->arch.vpa_update_lock);
623 if (gpa == vpap->next_gpa)
625 /* sigh... unpin that one and try again */
627 kvmppc_unpin_guest_page(kvm, va, gpa, false);
630 vpap->update_pending = 0;
631 if (va && nb < vpap->len) {
633 * If it's now too short, it must be that userspace
634 * has changed the mappings underlying guest memory,
635 * so unregister the region.
637 kvmppc_unpin_guest_page(kvm, va, gpa, false);
640 if (vpap->pinned_addr)
641 kvmppc_unpin_guest_page(kvm, vpap->pinned_addr, vpap->gpa,
644 vpap->pinned_addr = va;
647 vpap->pinned_end = va + vpap->len;
650 static void kvmppc_update_vpas(struct kvm_vcpu *vcpu)
652 if (!(vcpu->arch.vpa.update_pending ||
653 vcpu->arch.slb_shadow.update_pending ||
654 vcpu->arch.dtl.update_pending))
657 spin_lock(&vcpu->arch.vpa_update_lock);
658 if (vcpu->arch.vpa.update_pending) {
659 kvmppc_update_vpa(vcpu, &vcpu->arch.vpa);
660 if (vcpu->arch.vpa.pinned_addr)
661 init_vpa(vcpu, vcpu->arch.vpa.pinned_addr);
663 if (vcpu->arch.dtl.update_pending) {
664 kvmppc_update_vpa(vcpu, &vcpu->arch.dtl);
665 vcpu->arch.dtl_ptr = vcpu->arch.dtl.pinned_addr;
666 vcpu->arch.dtl_index = 0;
668 if (vcpu->arch.slb_shadow.update_pending)
669 kvmppc_update_vpa(vcpu, &vcpu->arch.slb_shadow);
670 spin_unlock(&vcpu->arch.vpa_update_lock);
674 * Return the accumulated stolen time for the vcore up until `now'.
675 * The caller should hold the vcore lock.
677 static u64 vcore_stolen_time(struct kvmppc_vcore *vc, u64 now)
682 spin_lock_irqsave(&vc->stoltb_lock, flags);
684 if (vc->vcore_state != VCORE_INACTIVE &&
685 vc->preempt_tb != TB_NIL)
686 p += now - vc->preempt_tb;
687 spin_unlock_irqrestore(&vc->stoltb_lock, flags);
691 static void kvmppc_create_dtl_entry(struct kvm_vcpu *vcpu,
692 struct kvmppc_vcore *vc)
694 struct dtl_entry *dt;
696 unsigned long stolen;
697 unsigned long core_stolen;
701 dt = vcpu->arch.dtl_ptr;
702 vpa = vcpu->arch.vpa.pinned_addr;
704 core_stolen = vcore_stolen_time(vc, now);
705 stolen = core_stolen - vcpu->arch.stolen_logged;
706 vcpu->arch.stolen_logged = core_stolen;
707 spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags);
708 stolen += vcpu->arch.busy_stolen;
709 vcpu->arch.busy_stolen = 0;
710 spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags);
713 memset(dt, 0, sizeof(struct dtl_entry));
714 dt->dispatch_reason = 7;
715 dt->processor_id = cpu_to_be16(vc->pcpu + vcpu->arch.ptid);
716 dt->timebase = cpu_to_be64(now + vc->tb_offset);
717 dt->enqueue_to_dispatch_time = cpu_to_be32(stolen);
718 dt->srr0 = cpu_to_be64(kvmppc_get_pc(vcpu));
719 dt->srr1 = cpu_to_be64(vcpu->arch.shregs.msr);
721 if (dt == vcpu->arch.dtl.pinned_end)
722 dt = vcpu->arch.dtl.pinned_addr;
723 vcpu->arch.dtl_ptr = dt;
724 /* order writing *dt vs. writing vpa->dtl_idx */
726 vpa->dtl_idx = cpu_to_be64(++vcpu->arch.dtl_index);
727 vcpu->arch.dtl.dirty = true;
730 /* See if there is a doorbell interrupt pending for a vcpu */
731 static bool kvmppc_doorbell_pending(struct kvm_vcpu *vcpu)
734 struct kvmppc_vcore *vc;
736 if (vcpu->arch.doorbell_request)
739 * Ensure that the read of vcore->dpdes comes after the read
740 * of vcpu->doorbell_request. This barrier matches the
741 * smp_wmb() in kvmppc_guest_entry_inject().
744 vc = vcpu->arch.vcore;
745 thr = vcpu->vcpu_id - vc->first_vcpuid;
746 return !!(vc->dpdes & (1 << thr));
749 static bool kvmppc_power8_compatible(struct kvm_vcpu *vcpu)
751 if (vcpu->arch.vcore->arch_compat >= PVR_ARCH_207)
753 if ((!vcpu->arch.vcore->arch_compat) &&
754 cpu_has_feature(CPU_FTR_ARCH_207S))
759 static int kvmppc_h_set_mode(struct kvm_vcpu *vcpu, unsigned long mflags,
760 unsigned long resource, unsigned long value1,
761 unsigned long value2)
764 case H_SET_MODE_RESOURCE_SET_CIABR:
765 if (!kvmppc_power8_compatible(vcpu))
770 return H_UNSUPPORTED_FLAG_START;
771 /* Guests can't breakpoint the hypervisor */
772 if ((value1 & CIABR_PRIV) == CIABR_PRIV_HYPER)
774 vcpu->arch.ciabr = value1;
776 case H_SET_MODE_RESOURCE_SET_DAWR0:
777 if (!kvmppc_power8_compatible(vcpu))
779 if (!ppc_breakpoint_available())
782 return H_UNSUPPORTED_FLAG_START;
783 if (value2 & DABRX_HYP)
785 vcpu->arch.dawr0 = value1;
786 vcpu->arch.dawrx0 = value2;
788 case H_SET_MODE_RESOURCE_SET_DAWR1:
789 if (!kvmppc_power8_compatible(vcpu))
791 if (!ppc_breakpoint_available())
793 if (!cpu_has_feature(CPU_FTR_DAWR1))
795 if (!vcpu->kvm->arch.dawr1_enabled)
798 return H_UNSUPPORTED_FLAG_START;
799 if (value2 & DABRX_HYP)
801 vcpu->arch.dawr1 = value1;
802 vcpu->arch.dawrx1 = value2;
804 case H_SET_MODE_RESOURCE_ADDR_TRANS_MODE:
805 /* KVM does not support mflags=2 (AIL=2) */
806 if (mflags != 0 && mflags != 3)
807 return H_UNSUPPORTED_FLAG_START;
814 /* Copy guest memory in place - must reside within a single memslot */
815 static int kvmppc_copy_guest(struct kvm *kvm, gpa_t to, gpa_t from,
818 struct kvm_memory_slot *to_memslot = NULL;
819 struct kvm_memory_slot *from_memslot = NULL;
820 unsigned long to_addr, from_addr;
823 /* Get HPA for from address */
824 from_memslot = gfn_to_memslot(kvm, from >> PAGE_SHIFT);
827 if ((from + len) >= ((from_memslot->base_gfn + from_memslot->npages)
830 from_addr = gfn_to_hva_memslot(from_memslot, from >> PAGE_SHIFT);
831 if (kvm_is_error_hva(from_addr))
833 from_addr |= (from & (PAGE_SIZE - 1));
835 /* Get HPA for to address */
836 to_memslot = gfn_to_memslot(kvm, to >> PAGE_SHIFT);
839 if ((to + len) >= ((to_memslot->base_gfn + to_memslot->npages)
842 to_addr = gfn_to_hva_memslot(to_memslot, to >> PAGE_SHIFT);
843 if (kvm_is_error_hva(to_addr))
845 to_addr |= (to & (PAGE_SIZE - 1));
848 r = raw_copy_in_user((void __user *)to_addr, (void __user *)from_addr,
852 mark_page_dirty(kvm, to >> PAGE_SHIFT);
856 static long kvmppc_h_page_init(struct kvm_vcpu *vcpu, unsigned long flags,
857 unsigned long dest, unsigned long src)
859 u64 pg_sz = SZ_4K; /* 4K page size */
860 u64 pg_mask = SZ_4K - 1;
863 /* Check for invalid flags (H_PAGE_SET_LOANED covers all CMO flags) */
864 if (flags & ~(H_ICACHE_INVALIDATE | H_ICACHE_SYNCHRONIZE |
865 H_ZERO_PAGE | H_COPY_PAGE | H_PAGE_SET_LOANED))
868 /* dest (and src if copy_page flag set) must be page aligned */
869 if ((dest & pg_mask) || ((flags & H_COPY_PAGE) && (src & pg_mask)))
872 /* zero and/or copy the page as determined by the flags */
873 if (flags & H_COPY_PAGE) {
874 ret = kvmppc_copy_guest(vcpu->kvm, dest, src, pg_sz);
877 } else if (flags & H_ZERO_PAGE) {
878 ret = kvm_clear_guest(vcpu->kvm, dest, pg_sz);
883 /* We can ignore the remaining flags */
888 static int kvm_arch_vcpu_yield_to(struct kvm_vcpu *target)
890 struct kvmppc_vcore *vcore = target->arch.vcore;
893 * We expect to have been called by the real mode handler
894 * (kvmppc_rm_h_confer()) which would have directly returned
895 * H_SUCCESS if the source vcore wasn't idle (e.g. if it may
896 * have useful work to do and should not confer) so we don't
900 spin_lock(&vcore->lock);
901 if (target->arch.state == KVMPPC_VCPU_RUNNABLE &&
902 vcore->vcore_state != VCORE_INACTIVE &&
904 target = vcore->runner;
905 spin_unlock(&vcore->lock);
907 return kvm_vcpu_yield_to(target);
910 static int kvmppc_get_yield_count(struct kvm_vcpu *vcpu)
913 struct lppaca *lppaca;
915 spin_lock(&vcpu->arch.vpa_update_lock);
916 lppaca = (struct lppaca *)vcpu->arch.vpa.pinned_addr;
918 yield_count = be32_to_cpu(lppaca->yield_count);
919 spin_unlock(&vcpu->arch.vpa_update_lock);
923 int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu)
925 unsigned long req = kvmppc_get_gpr(vcpu, 3);
926 unsigned long target, ret = H_SUCCESS;
928 struct kvm_vcpu *tvcpu;
931 if (req <= MAX_HCALL_OPCODE &&
932 !test_bit(req/4, vcpu->kvm->arch.enabled_hcalls))
939 target = kvmppc_get_gpr(vcpu, 4);
940 tvcpu = kvmppc_find_vcpu(vcpu->kvm, target);
945 tvcpu->arch.prodded = 1;
947 if (tvcpu->arch.ceded)
948 kvmppc_fast_vcpu_kick_hv(tvcpu);
951 target = kvmppc_get_gpr(vcpu, 4);
954 tvcpu = kvmppc_find_vcpu(vcpu->kvm, target);
959 yield_count = kvmppc_get_gpr(vcpu, 5);
960 if (kvmppc_get_yield_count(tvcpu) != yield_count)
962 kvm_arch_vcpu_yield_to(tvcpu);
965 ret = do_h_register_vpa(vcpu, kvmppc_get_gpr(vcpu, 4),
966 kvmppc_get_gpr(vcpu, 5),
967 kvmppc_get_gpr(vcpu, 6));
970 if (list_empty(&vcpu->kvm->arch.rtas_tokens))
973 idx = srcu_read_lock(&vcpu->kvm->srcu);
974 rc = kvmppc_rtas_hcall(vcpu);
975 srcu_read_unlock(&vcpu->kvm->srcu, idx);
982 /* Send the error out to userspace via KVM_RUN */
984 case H_LOGICAL_CI_LOAD:
985 ret = kvmppc_h_logical_ci_load(vcpu);
986 if (ret == H_TOO_HARD)
989 case H_LOGICAL_CI_STORE:
990 ret = kvmppc_h_logical_ci_store(vcpu);
991 if (ret == H_TOO_HARD)
995 ret = kvmppc_h_set_mode(vcpu, kvmppc_get_gpr(vcpu, 4),
996 kvmppc_get_gpr(vcpu, 5),
997 kvmppc_get_gpr(vcpu, 6),
998 kvmppc_get_gpr(vcpu, 7));
999 if (ret == H_TOO_HARD)
1008 if (kvmppc_xics_enabled(vcpu)) {
1009 if (xics_on_xive()) {
1010 ret = H_NOT_AVAILABLE;
1011 return RESUME_GUEST;
1013 ret = kvmppc_xics_hcall(vcpu, req);
1018 ret = kvmppc_h_set_dabr(vcpu, kvmppc_get_gpr(vcpu, 4));
1021 ret = kvmppc_h_set_xdabr(vcpu, kvmppc_get_gpr(vcpu, 4),
1022 kvmppc_get_gpr(vcpu, 5));
1024 #ifdef CONFIG_SPAPR_TCE_IOMMU
1026 ret = kvmppc_h_get_tce(vcpu, kvmppc_get_gpr(vcpu, 4),
1027 kvmppc_get_gpr(vcpu, 5));
1028 if (ret == H_TOO_HARD)
1032 ret = kvmppc_h_put_tce(vcpu, kvmppc_get_gpr(vcpu, 4),
1033 kvmppc_get_gpr(vcpu, 5),
1034 kvmppc_get_gpr(vcpu, 6));
1035 if (ret == H_TOO_HARD)
1038 case H_PUT_TCE_INDIRECT:
1039 ret = kvmppc_h_put_tce_indirect(vcpu, kvmppc_get_gpr(vcpu, 4),
1040 kvmppc_get_gpr(vcpu, 5),
1041 kvmppc_get_gpr(vcpu, 6),
1042 kvmppc_get_gpr(vcpu, 7));
1043 if (ret == H_TOO_HARD)
1047 ret = kvmppc_h_stuff_tce(vcpu, kvmppc_get_gpr(vcpu, 4),
1048 kvmppc_get_gpr(vcpu, 5),
1049 kvmppc_get_gpr(vcpu, 6),
1050 kvmppc_get_gpr(vcpu, 7));
1051 if (ret == H_TOO_HARD)
1056 if (!powernv_get_random_long(&vcpu->arch.regs.gpr[4]))
1060 case H_SET_PARTITION_TABLE:
1062 if (nesting_enabled(vcpu->kvm))
1063 ret = kvmhv_set_partition_table(vcpu);
1065 case H_ENTER_NESTED:
1067 if (!nesting_enabled(vcpu->kvm))
1069 ret = kvmhv_enter_nested_guest(vcpu);
1070 if (ret == H_INTERRUPT) {
1071 kvmppc_set_gpr(vcpu, 3, 0);
1072 vcpu->arch.hcall_needed = 0;
1074 } else if (ret == H_TOO_HARD) {
1075 kvmppc_set_gpr(vcpu, 3, 0);
1076 vcpu->arch.hcall_needed = 0;
1080 case H_TLB_INVALIDATE:
1082 if (nesting_enabled(vcpu->kvm))
1083 ret = kvmhv_do_nested_tlbie(vcpu);
1085 case H_COPY_TOFROM_GUEST:
1087 if (nesting_enabled(vcpu->kvm))
1088 ret = kvmhv_copy_tofrom_guest_nested(vcpu);
1091 ret = kvmppc_h_page_init(vcpu, kvmppc_get_gpr(vcpu, 4),
1092 kvmppc_get_gpr(vcpu, 5),
1093 kvmppc_get_gpr(vcpu, 6));
1096 ret = H_UNSUPPORTED;
1097 if (kvmppc_get_srr1(vcpu) & MSR_S)
1098 ret = kvmppc_h_svm_page_in(vcpu->kvm,
1099 kvmppc_get_gpr(vcpu, 4),
1100 kvmppc_get_gpr(vcpu, 5),
1101 kvmppc_get_gpr(vcpu, 6));
1103 case H_SVM_PAGE_OUT:
1104 ret = H_UNSUPPORTED;
1105 if (kvmppc_get_srr1(vcpu) & MSR_S)
1106 ret = kvmppc_h_svm_page_out(vcpu->kvm,
1107 kvmppc_get_gpr(vcpu, 4),
1108 kvmppc_get_gpr(vcpu, 5),
1109 kvmppc_get_gpr(vcpu, 6));
1111 case H_SVM_INIT_START:
1112 ret = H_UNSUPPORTED;
1113 if (kvmppc_get_srr1(vcpu) & MSR_S)
1114 ret = kvmppc_h_svm_init_start(vcpu->kvm);
1116 case H_SVM_INIT_DONE:
1117 ret = H_UNSUPPORTED;
1118 if (kvmppc_get_srr1(vcpu) & MSR_S)
1119 ret = kvmppc_h_svm_init_done(vcpu->kvm);
1121 case H_SVM_INIT_ABORT:
1123 * Even if that call is made by the Ultravisor, the SSR1 value
1124 * is the guest context one, with the secure bit clear as it has
1125 * not yet been secured. So we can't check it here.
1126 * Instead the kvm->arch.secure_guest flag is checked inside
1127 * kvmppc_h_svm_init_abort().
1129 ret = kvmppc_h_svm_init_abort(vcpu->kvm);
1135 kvmppc_set_gpr(vcpu, 3, ret);
1136 vcpu->arch.hcall_needed = 0;
1137 return RESUME_GUEST;
1141 * Handle H_CEDE in the nested virtualization case where we haven't
1142 * called the real-mode hcall handlers in book3s_hv_rmhandlers.S.
1143 * This has to be done early, not in kvmppc_pseries_do_hcall(), so
1144 * that the cede logic in kvmppc_run_single_vcpu() works properly.
1146 static void kvmppc_nested_cede(struct kvm_vcpu *vcpu)
1148 vcpu->arch.shregs.msr |= MSR_EE;
1149 vcpu->arch.ceded = 1;
1151 if (vcpu->arch.prodded) {
1152 vcpu->arch.prodded = 0;
1154 vcpu->arch.ceded = 0;
1158 static int kvmppc_hcall_impl_hv(unsigned long cmd)
1164 case H_REGISTER_VPA:
1166 case H_LOGICAL_CI_LOAD:
1167 case H_LOGICAL_CI_STORE:
1168 #ifdef CONFIG_KVM_XICS
1180 /* See if it's in the real-mode table */
1181 return kvmppc_hcall_impl_hv_realmode(cmd);
1184 static int kvmppc_emulate_debug_inst(struct kvm_vcpu *vcpu)
1188 if (kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst) !=
1191 * Fetch failed, so return to guest and
1192 * try executing it again.
1194 return RESUME_GUEST;
1197 if (last_inst == KVMPPC_INST_SW_BREAKPOINT) {
1198 vcpu->run->exit_reason = KVM_EXIT_DEBUG;
1199 vcpu->run->debug.arch.address = kvmppc_get_pc(vcpu);
1202 kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
1203 return RESUME_GUEST;
1207 static void do_nothing(void *x)
1211 static unsigned long kvmppc_read_dpdes(struct kvm_vcpu *vcpu)
1213 int thr, cpu, pcpu, nthreads;
1215 unsigned long dpdes;
1217 nthreads = vcpu->kvm->arch.emul_smt_mode;
1219 cpu = vcpu->vcpu_id & ~(nthreads - 1);
1220 for (thr = 0; thr < nthreads; ++thr, ++cpu) {
1221 v = kvmppc_find_vcpu(vcpu->kvm, cpu);
1225 * If the vcpu is currently running on a physical cpu thread,
1226 * interrupt it in order to pull it out of the guest briefly,
1227 * which will update its vcore->dpdes value.
1229 pcpu = READ_ONCE(v->cpu);
1231 smp_call_function_single(pcpu, do_nothing, NULL, 1);
1232 if (kvmppc_doorbell_pending(v))
1239 * On POWER9, emulate doorbell-related instructions in order to
1240 * give the guest the illusion of running on a multi-threaded core.
1241 * The instructions emulated are msgsndp, msgclrp, mfspr TIR,
1244 static int kvmppc_emulate_doorbell_instr(struct kvm_vcpu *vcpu)
1248 struct kvm *kvm = vcpu->kvm;
1249 struct kvm_vcpu *tvcpu;
1251 if (kvmppc_get_last_inst(vcpu, INST_GENERIC, &inst) != EMULATE_DONE)
1252 return RESUME_GUEST;
1253 if (get_op(inst) != 31)
1254 return EMULATE_FAIL;
1256 thr = vcpu->vcpu_id & (kvm->arch.emul_smt_mode - 1);
1257 switch (get_xop(inst)) {
1258 case OP_31_XOP_MSGSNDP:
1259 arg = kvmppc_get_gpr(vcpu, rb);
1260 if (((arg >> 27) & 0x1f) != PPC_DBELL_SERVER)
1263 if (arg >= kvm->arch.emul_smt_mode)
1265 tvcpu = kvmppc_find_vcpu(kvm, vcpu->vcpu_id - thr + arg);
1268 if (!tvcpu->arch.doorbell_request) {
1269 tvcpu->arch.doorbell_request = 1;
1270 kvmppc_fast_vcpu_kick_hv(tvcpu);
1273 case OP_31_XOP_MSGCLRP:
1274 arg = kvmppc_get_gpr(vcpu, rb);
1275 if (((arg >> 27) & 0x1f) != PPC_DBELL_SERVER)
1277 vcpu->arch.vcore->dpdes = 0;
1278 vcpu->arch.doorbell_request = 0;
1280 case OP_31_XOP_MFSPR:
1281 switch (get_sprn(inst)) {
1286 arg = kvmppc_read_dpdes(vcpu);
1289 return EMULATE_FAIL;
1291 kvmppc_set_gpr(vcpu, get_rt(inst), arg);
1294 return EMULATE_FAIL;
1296 kvmppc_set_pc(vcpu, kvmppc_get_pc(vcpu) + 4);
1297 return RESUME_GUEST;
1300 static int kvmppc_handle_exit_hv(struct kvm_vcpu *vcpu,
1301 struct task_struct *tsk)
1303 struct kvm_run *run = vcpu->run;
1304 int r = RESUME_HOST;
1306 vcpu->stat.sum_exits++;
1309 * This can happen if an interrupt occurs in the last stages
1310 * of guest entry or the first stages of guest exit (i.e. after
1311 * setting paca->kvm_hstate.in_guest to KVM_GUEST_MODE_GUEST_HV
1312 * and before setting it to KVM_GUEST_MODE_HOST_HV).
1313 * That can happen due to a bug, or due to a machine check
1314 * occurring at just the wrong time.
1316 if (vcpu->arch.shregs.msr & MSR_HV) {
1317 printk(KERN_EMERG "KVM trap in HV mode!\n");
1318 printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n",
1319 vcpu->arch.trap, kvmppc_get_pc(vcpu),
1320 vcpu->arch.shregs.msr);
1321 kvmppc_dump_regs(vcpu);
1322 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1323 run->hw.hardware_exit_reason = vcpu->arch.trap;
1326 run->exit_reason = KVM_EXIT_UNKNOWN;
1327 run->ready_for_interrupt_injection = 1;
1328 switch (vcpu->arch.trap) {
1329 /* We're good on these - the host merely wanted to get our attention */
1330 case BOOK3S_INTERRUPT_HV_DECREMENTER:
1331 vcpu->stat.dec_exits++;
1334 case BOOK3S_INTERRUPT_EXTERNAL:
1335 case BOOK3S_INTERRUPT_H_DOORBELL:
1336 case BOOK3S_INTERRUPT_H_VIRT:
1337 vcpu->stat.ext_intr_exits++;
1340 /* SR/HMI/PMI are HV interrupts that host has handled. Resume guest.*/
1341 case BOOK3S_INTERRUPT_HMI:
1342 case BOOK3S_INTERRUPT_PERFMON:
1343 case BOOK3S_INTERRUPT_SYSTEM_RESET:
1346 case BOOK3S_INTERRUPT_MACHINE_CHECK: {
1347 static DEFINE_RATELIMIT_STATE(rs, DEFAULT_RATELIMIT_INTERVAL,
1348 DEFAULT_RATELIMIT_BURST);
1350 * Print the MCE event to host console. Ratelimit so the guest
1351 * can't flood the host log.
1353 if (__ratelimit(&rs))
1354 machine_check_print_event_info(&vcpu->arch.mce_evt,false, true);
1357 * If the guest can do FWNMI, exit to userspace so it can
1358 * deliver a FWNMI to the guest.
1359 * Otherwise we synthesize a machine check for the guest
1360 * so that it knows that the machine check occurred.
1362 if (!vcpu->kvm->arch.fwnmi_enabled) {
1363 ulong flags = vcpu->arch.shregs.msr & 0x083c0000;
1364 kvmppc_core_queue_machine_check(vcpu, flags);
1369 /* Exit to guest with KVM_EXIT_NMI as exit reason */
1370 run->exit_reason = KVM_EXIT_NMI;
1371 run->hw.hardware_exit_reason = vcpu->arch.trap;
1372 /* Clear out the old NMI status from run->flags */
1373 run->flags &= ~KVM_RUN_PPC_NMI_DISP_MASK;
1374 /* Now set the NMI status */
1375 if (vcpu->arch.mce_evt.disposition == MCE_DISPOSITION_RECOVERED)
1376 run->flags |= KVM_RUN_PPC_NMI_DISP_FULLY_RECOV;
1378 run->flags |= KVM_RUN_PPC_NMI_DISP_NOT_RECOV;
1383 case BOOK3S_INTERRUPT_PROGRAM:
1387 * Normally program interrupts are delivered directly
1388 * to the guest by the hardware, but we can get here
1389 * as a result of a hypervisor emulation interrupt
1390 * (e40) getting turned into a 700 by BML RTAS.
1392 flags = vcpu->arch.shregs.msr & 0x1f0000ull;
1393 kvmppc_core_queue_program(vcpu, flags);
1397 case BOOK3S_INTERRUPT_SYSCALL:
1399 /* hcall - punt to userspace */
1402 /* hypercall with MSR_PR has already been handled in rmode,
1403 * and never reaches here.
1406 run->papr_hcall.nr = kvmppc_get_gpr(vcpu, 3);
1407 for (i = 0; i < 9; ++i)
1408 run->papr_hcall.args[i] = kvmppc_get_gpr(vcpu, 4 + i);
1409 run->exit_reason = KVM_EXIT_PAPR_HCALL;
1410 vcpu->arch.hcall_needed = 1;
1415 * We get these next two if the guest accesses a page which it thinks
1416 * it has mapped but which is not actually present, either because
1417 * it is for an emulated I/O device or because the corresonding
1418 * host page has been paged out. Any other HDSI/HISI interrupts
1419 * have been handled already.
1421 case BOOK3S_INTERRUPT_H_DATA_STORAGE:
1422 r = RESUME_PAGE_FAULT;
1424 case BOOK3S_INTERRUPT_H_INST_STORAGE:
1425 vcpu->arch.fault_dar = kvmppc_get_pc(vcpu);
1426 vcpu->arch.fault_dsisr = vcpu->arch.shregs.msr &
1427 DSISR_SRR1_MATCH_64S;
1428 if (vcpu->arch.shregs.msr & HSRR1_HISI_WRITE)
1429 vcpu->arch.fault_dsisr |= DSISR_ISSTORE;
1430 r = RESUME_PAGE_FAULT;
1433 * This occurs if the guest executes an illegal instruction.
1434 * If the guest debug is disabled, generate a program interrupt
1435 * to the guest. If guest debug is enabled, we need to check
1436 * whether the instruction is a software breakpoint instruction.
1437 * Accordingly return to Guest or Host.
1439 case BOOK3S_INTERRUPT_H_EMUL_ASSIST:
1440 if (vcpu->arch.emul_inst != KVM_INST_FETCH_FAILED)
1441 vcpu->arch.last_inst = kvmppc_need_byteswap(vcpu) ?
1442 swab32(vcpu->arch.emul_inst) :
1443 vcpu->arch.emul_inst;
1444 if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) {
1445 r = kvmppc_emulate_debug_inst(vcpu);
1447 kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
1452 * This occurs if the guest (kernel or userspace), does something that
1453 * is prohibited by HFSCR.
1454 * On POWER9, this could be a doorbell instruction that we need
1456 * Otherwise, we just generate a program interrupt to the guest.
1458 case BOOK3S_INTERRUPT_H_FAC_UNAVAIL:
1460 if (((vcpu->arch.hfscr >> 56) == FSCR_MSGP_LG) &&
1461 cpu_has_feature(CPU_FTR_ARCH_300))
1462 r = kvmppc_emulate_doorbell_instr(vcpu);
1463 if (r == EMULATE_FAIL) {
1464 kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
1469 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1470 case BOOK3S_INTERRUPT_HV_SOFTPATCH:
1472 * This occurs for various TM-related instructions that
1473 * we need to emulate on POWER9 DD2.2. We have already
1474 * handled the cases where the guest was in real-suspend
1475 * mode and was transitioning to transactional state.
1477 r = kvmhv_p9_tm_emulation(vcpu);
1481 case BOOK3S_INTERRUPT_HV_RM_HARD:
1482 r = RESUME_PASSTHROUGH;
1485 kvmppc_dump_regs(vcpu);
1486 printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n",
1487 vcpu->arch.trap, kvmppc_get_pc(vcpu),
1488 vcpu->arch.shregs.msr);
1489 run->hw.hardware_exit_reason = vcpu->arch.trap;
1497 static int kvmppc_handle_nested_exit(struct kvm_vcpu *vcpu)
1502 vcpu->stat.sum_exits++;
1505 * This can happen if an interrupt occurs in the last stages
1506 * of guest entry or the first stages of guest exit (i.e. after
1507 * setting paca->kvm_hstate.in_guest to KVM_GUEST_MODE_GUEST_HV
1508 * and before setting it to KVM_GUEST_MODE_HOST_HV).
1509 * That can happen due to a bug, or due to a machine check
1510 * occurring at just the wrong time.
1512 if (vcpu->arch.shregs.msr & MSR_HV) {
1513 pr_emerg("KVM trap in HV mode while nested!\n");
1514 pr_emerg("trap=0x%x | pc=0x%lx | msr=0x%llx\n",
1515 vcpu->arch.trap, kvmppc_get_pc(vcpu),
1516 vcpu->arch.shregs.msr);
1517 kvmppc_dump_regs(vcpu);
1520 switch (vcpu->arch.trap) {
1521 /* We're good on these - the host merely wanted to get our attention */
1522 case BOOK3S_INTERRUPT_HV_DECREMENTER:
1523 vcpu->stat.dec_exits++;
1526 case BOOK3S_INTERRUPT_EXTERNAL:
1527 vcpu->stat.ext_intr_exits++;
1530 case BOOK3S_INTERRUPT_H_DOORBELL:
1531 case BOOK3S_INTERRUPT_H_VIRT:
1532 vcpu->stat.ext_intr_exits++;
1535 /* SR/HMI/PMI are HV interrupts that host has handled. Resume guest.*/
1536 case BOOK3S_INTERRUPT_HMI:
1537 case BOOK3S_INTERRUPT_PERFMON:
1538 case BOOK3S_INTERRUPT_SYSTEM_RESET:
1541 case BOOK3S_INTERRUPT_MACHINE_CHECK:
1543 static DEFINE_RATELIMIT_STATE(rs, DEFAULT_RATELIMIT_INTERVAL,
1544 DEFAULT_RATELIMIT_BURST);
1545 /* Pass the machine check to the L1 guest */
1547 /* Print the MCE event to host console. */
1548 if (__ratelimit(&rs))
1549 machine_check_print_event_info(&vcpu->arch.mce_evt, false, true);
1553 * We get these next two if the guest accesses a page which it thinks
1554 * it has mapped but which is not actually present, either because
1555 * it is for an emulated I/O device or because the corresonding
1556 * host page has been paged out.
1558 case BOOK3S_INTERRUPT_H_DATA_STORAGE:
1559 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
1560 r = kvmhv_nested_page_fault(vcpu);
1561 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
1563 case BOOK3S_INTERRUPT_H_INST_STORAGE:
1564 vcpu->arch.fault_dar = kvmppc_get_pc(vcpu);
1565 vcpu->arch.fault_dsisr = kvmppc_get_msr(vcpu) &
1566 DSISR_SRR1_MATCH_64S;
1567 if (vcpu->arch.shregs.msr & HSRR1_HISI_WRITE)
1568 vcpu->arch.fault_dsisr |= DSISR_ISSTORE;
1569 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
1570 r = kvmhv_nested_page_fault(vcpu);
1571 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
1574 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1575 case BOOK3S_INTERRUPT_HV_SOFTPATCH:
1577 * This occurs for various TM-related instructions that
1578 * we need to emulate on POWER9 DD2.2. We have already
1579 * handled the cases where the guest was in real-suspend
1580 * mode and was transitioning to transactional state.
1582 r = kvmhv_p9_tm_emulation(vcpu);
1586 case BOOK3S_INTERRUPT_HV_RM_HARD:
1587 vcpu->arch.trap = 0;
1589 if (!xics_on_xive())
1590 kvmppc_xics_rm_complete(vcpu, 0);
1600 static int kvm_arch_vcpu_ioctl_get_sregs_hv(struct kvm_vcpu *vcpu,
1601 struct kvm_sregs *sregs)
1605 memset(sregs, 0, sizeof(struct kvm_sregs));
1606 sregs->pvr = vcpu->arch.pvr;
1607 for (i = 0; i < vcpu->arch.slb_max; i++) {
1608 sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige;
1609 sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv;
1615 static int kvm_arch_vcpu_ioctl_set_sregs_hv(struct kvm_vcpu *vcpu,
1616 struct kvm_sregs *sregs)
1620 /* Only accept the same PVR as the host's, since we can't spoof it */
1621 if (sregs->pvr != vcpu->arch.pvr)
1625 for (i = 0; i < vcpu->arch.slb_nr; i++) {
1626 if (sregs->u.s.ppc64.slb[i].slbe & SLB_ESID_V) {
1627 vcpu->arch.slb[j].orige = sregs->u.s.ppc64.slb[i].slbe;
1628 vcpu->arch.slb[j].origv = sregs->u.s.ppc64.slb[i].slbv;
1632 vcpu->arch.slb_max = j;
1637 static void kvmppc_set_lpcr(struct kvm_vcpu *vcpu, u64 new_lpcr,
1638 bool preserve_top32)
1640 struct kvm *kvm = vcpu->kvm;
1641 struct kvmppc_vcore *vc = vcpu->arch.vcore;
1644 spin_lock(&vc->lock);
1646 * If ILE (interrupt little-endian) has changed, update the
1647 * MSR_LE bit in the intr_msr for each vcpu in this vcore.
1649 if ((new_lpcr & LPCR_ILE) != (vc->lpcr & LPCR_ILE)) {
1650 struct kvm_vcpu *vcpu;
1653 kvm_for_each_vcpu(i, vcpu, kvm) {
1654 if (vcpu->arch.vcore != vc)
1656 if (new_lpcr & LPCR_ILE)
1657 vcpu->arch.intr_msr |= MSR_LE;
1659 vcpu->arch.intr_msr &= ~MSR_LE;
1664 * Userspace can only modify DPFD (default prefetch depth),
1665 * ILE (interrupt little-endian) and TC (translation control).
1666 * On POWER8 and POWER9 userspace can also modify AIL (alt. interrupt loc.).
1668 mask = LPCR_DPFD | LPCR_ILE | LPCR_TC;
1669 if (cpu_has_feature(CPU_FTR_ARCH_207S))
1672 * On POWER9, allow userspace to enable large decrementer for the
1673 * guest, whether or not the host has it enabled.
1675 if (cpu_has_feature(CPU_FTR_ARCH_300))
1678 /* Broken 32-bit version of LPCR must not clear top bits */
1681 vc->lpcr = (vc->lpcr & ~mask) | (new_lpcr & mask);
1682 spin_unlock(&vc->lock);
1685 static int kvmppc_get_one_reg_hv(struct kvm_vcpu *vcpu, u64 id,
1686 union kvmppc_one_reg *val)
1692 case KVM_REG_PPC_DEBUG_INST:
1693 *val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT);
1695 case KVM_REG_PPC_HIOR:
1696 *val = get_reg_val(id, 0);
1698 case KVM_REG_PPC_DABR:
1699 *val = get_reg_val(id, vcpu->arch.dabr);
1701 case KVM_REG_PPC_DABRX:
1702 *val = get_reg_val(id, vcpu->arch.dabrx);
1704 case KVM_REG_PPC_DSCR:
1705 *val = get_reg_val(id, vcpu->arch.dscr);
1707 case KVM_REG_PPC_PURR:
1708 *val = get_reg_val(id, vcpu->arch.purr);
1710 case KVM_REG_PPC_SPURR:
1711 *val = get_reg_val(id, vcpu->arch.spurr);
1713 case KVM_REG_PPC_AMR:
1714 *val = get_reg_val(id, vcpu->arch.amr);
1716 case KVM_REG_PPC_UAMOR:
1717 *val = get_reg_val(id, vcpu->arch.uamor);
1719 case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCR1:
1720 i = id - KVM_REG_PPC_MMCR0;
1721 *val = get_reg_val(id, vcpu->arch.mmcr[i]);
1723 case KVM_REG_PPC_MMCR2:
1724 *val = get_reg_val(id, vcpu->arch.mmcr[2]);
1726 case KVM_REG_PPC_MMCRA:
1727 *val = get_reg_val(id, vcpu->arch.mmcra);
1729 case KVM_REG_PPC_MMCRS:
1730 *val = get_reg_val(id, vcpu->arch.mmcrs);
1732 case KVM_REG_PPC_MMCR3:
1733 *val = get_reg_val(id, vcpu->arch.mmcr[3]);
1735 case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8:
1736 i = id - KVM_REG_PPC_PMC1;
1737 *val = get_reg_val(id, vcpu->arch.pmc[i]);
1739 case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2:
1740 i = id - KVM_REG_PPC_SPMC1;
1741 *val = get_reg_val(id, vcpu->arch.spmc[i]);
1743 case KVM_REG_PPC_SIAR:
1744 *val = get_reg_val(id, vcpu->arch.siar);
1746 case KVM_REG_PPC_SDAR:
1747 *val = get_reg_val(id, vcpu->arch.sdar);
1749 case KVM_REG_PPC_SIER:
1750 *val = get_reg_val(id, vcpu->arch.sier[0]);
1752 case KVM_REG_PPC_SIER2:
1753 *val = get_reg_val(id, vcpu->arch.sier[1]);
1755 case KVM_REG_PPC_SIER3:
1756 *val = get_reg_val(id, vcpu->arch.sier[2]);
1758 case KVM_REG_PPC_IAMR:
1759 *val = get_reg_val(id, vcpu->arch.iamr);
1761 case KVM_REG_PPC_PSPB:
1762 *val = get_reg_val(id, vcpu->arch.pspb);
1764 case KVM_REG_PPC_DPDES:
1766 * On POWER9, where we are emulating msgsndp etc.,
1767 * we return 1 bit for each vcpu, which can come from
1768 * either vcore->dpdes or doorbell_request.
1769 * On POWER8, doorbell_request is 0.
1771 *val = get_reg_val(id, vcpu->arch.vcore->dpdes |
1772 vcpu->arch.doorbell_request);
1774 case KVM_REG_PPC_VTB:
1775 *val = get_reg_val(id, vcpu->arch.vcore->vtb);
1777 case KVM_REG_PPC_DAWR:
1778 *val = get_reg_val(id, vcpu->arch.dawr0);
1780 case KVM_REG_PPC_DAWRX:
1781 *val = get_reg_val(id, vcpu->arch.dawrx0);
1783 case KVM_REG_PPC_DAWR1:
1784 *val = get_reg_val(id, vcpu->arch.dawr1);
1786 case KVM_REG_PPC_DAWRX1:
1787 *val = get_reg_val(id, vcpu->arch.dawrx1);
1789 case KVM_REG_PPC_CIABR:
1790 *val = get_reg_val(id, vcpu->arch.ciabr);
1792 case KVM_REG_PPC_CSIGR:
1793 *val = get_reg_val(id, vcpu->arch.csigr);
1795 case KVM_REG_PPC_TACR:
1796 *val = get_reg_val(id, vcpu->arch.tacr);
1798 case KVM_REG_PPC_TCSCR:
1799 *val = get_reg_val(id, vcpu->arch.tcscr);
1801 case KVM_REG_PPC_PID:
1802 *val = get_reg_val(id, vcpu->arch.pid);
1804 case KVM_REG_PPC_ACOP:
1805 *val = get_reg_val(id, vcpu->arch.acop);
1807 case KVM_REG_PPC_WORT:
1808 *val = get_reg_val(id, vcpu->arch.wort);
1810 case KVM_REG_PPC_TIDR:
1811 *val = get_reg_val(id, vcpu->arch.tid);
1813 case KVM_REG_PPC_PSSCR:
1814 *val = get_reg_val(id, vcpu->arch.psscr);
1816 case KVM_REG_PPC_VPA_ADDR:
1817 spin_lock(&vcpu->arch.vpa_update_lock);
1818 *val = get_reg_val(id, vcpu->arch.vpa.next_gpa);
1819 spin_unlock(&vcpu->arch.vpa_update_lock);
1821 case KVM_REG_PPC_VPA_SLB:
1822 spin_lock(&vcpu->arch.vpa_update_lock);
1823 val->vpaval.addr = vcpu->arch.slb_shadow.next_gpa;
1824 val->vpaval.length = vcpu->arch.slb_shadow.len;
1825 spin_unlock(&vcpu->arch.vpa_update_lock);
1827 case KVM_REG_PPC_VPA_DTL:
1828 spin_lock(&vcpu->arch.vpa_update_lock);
1829 val->vpaval.addr = vcpu->arch.dtl.next_gpa;
1830 val->vpaval.length = vcpu->arch.dtl.len;
1831 spin_unlock(&vcpu->arch.vpa_update_lock);
1833 case KVM_REG_PPC_TB_OFFSET:
1834 *val = get_reg_val(id, vcpu->arch.vcore->tb_offset);
1836 case KVM_REG_PPC_LPCR:
1837 case KVM_REG_PPC_LPCR_64:
1838 *val = get_reg_val(id, vcpu->arch.vcore->lpcr);
1840 case KVM_REG_PPC_PPR:
1841 *val = get_reg_val(id, vcpu->arch.ppr);
1843 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
1844 case KVM_REG_PPC_TFHAR:
1845 *val = get_reg_val(id, vcpu->arch.tfhar);
1847 case KVM_REG_PPC_TFIAR:
1848 *val = get_reg_val(id, vcpu->arch.tfiar);
1850 case KVM_REG_PPC_TEXASR:
1851 *val = get_reg_val(id, vcpu->arch.texasr);
1853 case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31:
1854 i = id - KVM_REG_PPC_TM_GPR0;
1855 *val = get_reg_val(id, vcpu->arch.gpr_tm[i]);
1857 case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63:
1860 i = id - KVM_REG_PPC_TM_VSR0;
1862 for (j = 0; j < TS_FPRWIDTH; j++)
1863 val->vsxval[j] = vcpu->arch.fp_tm.fpr[i][j];
1865 if (cpu_has_feature(CPU_FTR_ALTIVEC))
1866 val->vval = vcpu->arch.vr_tm.vr[i-32];
1872 case KVM_REG_PPC_TM_CR:
1873 *val = get_reg_val(id, vcpu->arch.cr_tm);
1875 case KVM_REG_PPC_TM_XER:
1876 *val = get_reg_val(id, vcpu->arch.xer_tm);
1878 case KVM_REG_PPC_TM_LR:
1879 *val = get_reg_val(id, vcpu->arch.lr_tm);
1881 case KVM_REG_PPC_TM_CTR:
1882 *val = get_reg_val(id, vcpu->arch.ctr_tm);
1884 case KVM_REG_PPC_TM_FPSCR:
1885 *val = get_reg_val(id, vcpu->arch.fp_tm.fpscr);
1887 case KVM_REG_PPC_TM_AMR:
1888 *val = get_reg_val(id, vcpu->arch.amr_tm);
1890 case KVM_REG_PPC_TM_PPR:
1891 *val = get_reg_val(id, vcpu->arch.ppr_tm);
1893 case KVM_REG_PPC_TM_VRSAVE:
1894 *val = get_reg_val(id, vcpu->arch.vrsave_tm);
1896 case KVM_REG_PPC_TM_VSCR:
1897 if (cpu_has_feature(CPU_FTR_ALTIVEC))
1898 *val = get_reg_val(id, vcpu->arch.vr_tm.vscr.u[3]);
1902 case KVM_REG_PPC_TM_DSCR:
1903 *val = get_reg_val(id, vcpu->arch.dscr_tm);
1905 case KVM_REG_PPC_TM_TAR:
1906 *val = get_reg_val(id, vcpu->arch.tar_tm);
1909 case KVM_REG_PPC_ARCH_COMPAT:
1910 *val = get_reg_val(id, vcpu->arch.vcore->arch_compat);
1912 case KVM_REG_PPC_DEC_EXPIRY:
1913 *val = get_reg_val(id, vcpu->arch.dec_expires +
1914 vcpu->arch.vcore->tb_offset);
1916 case KVM_REG_PPC_ONLINE:
1917 *val = get_reg_val(id, vcpu->arch.online);
1919 case KVM_REG_PPC_PTCR:
1920 *val = get_reg_val(id, vcpu->kvm->arch.l1_ptcr);
1930 static int kvmppc_set_one_reg_hv(struct kvm_vcpu *vcpu, u64 id,
1931 union kvmppc_one_reg *val)
1935 unsigned long addr, len;
1938 case KVM_REG_PPC_HIOR:
1939 /* Only allow this to be set to zero */
1940 if (set_reg_val(id, *val))
1943 case KVM_REG_PPC_DABR:
1944 vcpu->arch.dabr = set_reg_val(id, *val);
1946 case KVM_REG_PPC_DABRX:
1947 vcpu->arch.dabrx = set_reg_val(id, *val) & ~DABRX_HYP;
1949 case KVM_REG_PPC_DSCR:
1950 vcpu->arch.dscr = set_reg_val(id, *val);
1952 case KVM_REG_PPC_PURR:
1953 vcpu->arch.purr = set_reg_val(id, *val);
1955 case KVM_REG_PPC_SPURR:
1956 vcpu->arch.spurr = set_reg_val(id, *val);
1958 case KVM_REG_PPC_AMR:
1959 vcpu->arch.amr = set_reg_val(id, *val);
1961 case KVM_REG_PPC_UAMOR:
1962 vcpu->arch.uamor = set_reg_val(id, *val);
1964 case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCR1:
1965 i = id - KVM_REG_PPC_MMCR0;
1966 vcpu->arch.mmcr[i] = set_reg_val(id, *val);
1968 case KVM_REG_PPC_MMCR2:
1969 vcpu->arch.mmcr[2] = set_reg_val(id, *val);
1971 case KVM_REG_PPC_MMCRA:
1972 vcpu->arch.mmcra = set_reg_val(id, *val);
1974 case KVM_REG_PPC_MMCRS:
1975 vcpu->arch.mmcrs = set_reg_val(id, *val);
1977 case KVM_REG_PPC_MMCR3:
1978 *val = get_reg_val(id, vcpu->arch.mmcr[3]);
1980 case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8:
1981 i = id - KVM_REG_PPC_PMC1;
1982 vcpu->arch.pmc[i] = set_reg_val(id, *val);
1984 case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2:
1985 i = id - KVM_REG_PPC_SPMC1;
1986 vcpu->arch.spmc[i] = set_reg_val(id, *val);
1988 case KVM_REG_PPC_SIAR:
1989 vcpu->arch.siar = set_reg_val(id, *val);
1991 case KVM_REG_PPC_SDAR:
1992 vcpu->arch.sdar = set_reg_val(id, *val);
1994 case KVM_REG_PPC_SIER:
1995 vcpu->arch.sier[0] = set_reg_val(id, *val);
1997 case KVM_REG_PPC_SIER2:
1998 vcpu->arch.sier[1] = set_reg_val(id, *val);
2000 case KVM_REG_PPC_SIER3:
2001 vcpu->arch.sier[2] = set_reg_val(id, *val);
2003 case KVM_REG_PPC_IAMR:
2004 vcpu->arch.iamr = set_reg_val(id, *val);
2006 case KVM_REG_PPC_PSPB:
2007 vcpu->arch.pspb = set_reg_val(id, *val);
2009 case KVM_REG_PPC_DPDES:
2010 vcpu->arch.vcore->dpdes = set_reg_val(id, *val);
2012 case KVM_REG_PPC_VTB:
2013 vcpu->arch.vcore->vtb = set_reg_val(id, *val);
2015 case KVM_REG_PPC_DAWR:
2016 vcpu->arch.dawr0 = set_reg_val(id, *val);
2018 case KVM_REG_PPC_DAWRX:
2019 vcpu->arch.dawrx0 = set_reg_val(id, *val) & ~DAWRX_HYP;
2021 case KVM_REG_PPC_DAWR1:
2022 vcpu->arch.dawr1 = set_reg_val(id, *val);
2024 case KVM_REG_PPC_DAWRX1:
2025 vcpu->arch.dawrx1 = set_reg_val(id, *val) & ~DAWRX_HYP;
2027 case KVM_REG_PPC_CIABR:
2028 vcpu->arch.ciabr = set_reg_val(id, *val);
2029 /* Don't allow setting breakpoints in hypervisor code */
2030 if ((vcpu->arch.ciabr & CIABR_PRIV) == CIABR_PRIV_HYPER)
2031 vcpu->arch.ciabr &= ~CIABR_PRIV; /* disable */
2033 case KVM_REG_PPC_CSIGR:
2034 vcpu->arch.csigr = set_reg_val(id, *val);
2036 case KVM_REG_PPC_TACR:
2037 vcpu->arch.tacr = set_reg_val(id, *val);
2039 case KVM_REG_PPC_TCSCR:
2040 vcpu->arch.tcscr = set_reg_val(id, *val);
2042 case KVM_REG_PPC_PID:
2043 vcpu->arch.pid = set_reg_val(id, *val);
2045 case KVM_REG_PPC_ACOP:
2046 vcpu->arch.acop = set_reg_val(id, *val);
2048 case KVM_REG_PPC_WORT:
2049 vcpu->arch.wort = set_reg_val(id, *val);
2051 case KVM_REG_PPC_TIDR:
2052 vcpu->arch.tid = set_reg_val(id, *val);
2054 case KVM_REG_PPC_PSSCR:
2055 vcpu->arch.psscr = set_reg_val(id, *val) & PSSCR_GUEST_VIS;
2057 case KVM_REG_PPC_VPA_ADDR:
2058 addr = set_reg_val(id, *val);
2060 if (!addr && (vcpu->arch.slb_shadow.next_gpa ||
2061 vcpu->arch.dtl.next_gpa))
2063 r = set_vpa(vcpu, &vcpu->arch.vpa, addr, sizeof(struct lppaca));
2065 case KVM_REG_PPC_VPA_SLB:
2066 addr = val->vpaval.addr;
2067 len = val->vpaval.length;
2069 if (addr && !vcpu->arch.vpa.next_gpa)
2071 r = set_vpa(vcpu, &vcpu->arch.slb_shadow, addr, len);
2073 case KVM_REG_PPC_VPA_DTL:
2074 addr = val->vpaval.addr;
2075 len = val->vpaval.length;
2077 if (addr && (len < sizeof(struct dtl_entry) ||
2078 !vcpu->arch.vpa.next_gpa))
2080 len -= len % sizeof(struct dtl_entry);
2081 r = set_vpa(vcpu, &vcpu->arch.dtl, addr, len);
2083 case KVM_REG_PPC_TB_OFFSET:
2084 /* round up to multiple of 2^24 */
2085 vcpu->arch.vcore->tb_offset =
2086 ALIGN(set_reg_val(id, *val), 1UL << 24);
2088 case KVM_REG_PPC_LPCR:
2089 kvmppc_set_lpcr(vcpu, set_reg_val(id, *val), true);
2091 case KVM_REG_PPC_LPCR_64:
2092 kvmppc_set_lpcr(vcpu, set_reg_val(id, *val), false);
2094 case KVM_REG_PPC_PPR:
2095 vcpu->arch.ppr = set_reg_val(id, *val);
2097 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
2098 case KVM_REG_PPC_TFHAR:
2099 vcpu->arch.tfhar = set_reg_val(id, *val);
2101 case KVM_REG_PPC_TFIAR:
2102 vcpu->arch.tfiar = set_reg_val(id, *val);
2104 case KVM_REG_PPC_TEXASR:
2105 vcpu->arch.texasr = set_reg_val(id, *val);
2107 case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31:
2108 i = id - KVM_REG_PPC_TM_GPR0;
2109 vcpu->arch.gpr_tm[i] = set_reg_val(id, *val);
2111 case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63:
2114 i = id - KVM_REG_PPC_TM_VSR0;
2116 for (j = 0; j < TS_FPRWIDTH; j++)
2117 vcpu->arch.fp_tm.fpr[i][j] = val->vsxval[j];
2119 if (cpu_has_feature(CPU_FTR_ALTIVEC))
2120 vcpu->arch.vr_tm.vr[i-32] = val->vval;
2125 case KVM_REG_PPC_TM_CR:
2126 vcpu->arch.cr_tm = set_reg_val(id, *val);
2128 case KVM_REG_PPC_TM_XER:
2129 vcpu->arch.xer_tm = set_reg_val(id, *val);
2131 case KVM_REG_PPC_TM_LR:
2132 vcpu->arch.lr_tm = set_reg_val(id, *val);
2134 case KVM_REG_PPC_TM_CTR:
2135 vcpu->arch.ctr_tm = set_reg_val(id, *val);
2137 case KVM_REG_PPC_TM_FPSCR:
2138 vcpu->arch.fp_tm.fpscr = set_reg_val(id, *val);
2140 case KVM_REG_PPC_TM_AMR:
2141 vcpu->arch.amr_tm = set_reg_val(id, *val);
2143 case KVM_REG_PPC_TM_PPR:
2144 vcpu->arch.ppr_tm = set_reg_val(id, *val);
2146 case KVM_REG_PPC_TM_VRSAVE:
2147 vcpu->arch.vrsave_tm = set_reg_val(id, *val);
2149 case KVM_REG_PPC_TM_VSCR:
2150 if (cpu_has_feature(CPU_FTR_ALTIVEC))
2151 vcpu->arch.vr.vscr.u[3] = set_reg_val(id, *val);
2155 case KVM_REG_PPC_TM_DSCR:
2156 vcpu->arch.dscr_tm = set_reg_val(id, *val);
2158 case KVM_REG_PPC_TM_TAR:
2159 vcpu->arch.tar_tm = set_reg_val(id, *val);
2162 case KVM_REG_PPC_ARCH_COMPAT:
2163 r = kvmppc_set_arch_compat(vcpu, set_reg_val(id, *val));
2165 case KVM_REG_PPC_DEC_EXPIRY:
2166 vcpu->arch.dec_expires = set_reg_val(id, *val) -
2167 vcpu->arch.vcore->tb_offset;
2169 case KVM_REG_PPC_ONLINE:
2170 i = set_reg_val(id, *val);
2171 if (i && !vcpu->arch.online)
2172 atomic_inc(&vcpu->arch.vcore->online_count);
2173 else if (!i && vcpu->arch.online)
2174 atomic_dec(&vcpu->arch.vcore->online_count);
2175 vcpu->arch.online = i;
2177 case KVM_REG_PPC_PTCR:
2178 vcpu->kvm->arch.l1_ptcr = set_reg_val(id, *val);
2189 * On POWER9, threads are independent and can be in different partitions.
2190 * Therefore we consider each thread to be a subcore.
2191 * There is a restriction that all threads have to be in the same
2192 * MMU mode (radix or HPT), unfortunately, but since we only support
2193 * HPT guests on a HPT host so far, that isn't an impediment yet.
2195 static int threads_per_vcore(struct kvm *kvm)
2197 if (kvm->arch.threads_indep)
2199 return threads_per_subcore;
2202 static struct kvmppc_vcore *kvmppc_vcore_create(struct kvm *kvm, int id)
2204 struct kvmppc_vcore *vcore;
2206 vcore = kzalloc(sizeof(struct kvmppc_vcore), GFP_KERNEL);
2211 spin_lock_init(&vcore->lock);
2212 spin_lock_init(&vcore->stoltb_lock);
2213 rcuwait_init(&vcore->wait);
2214 vcore->preempt_tb = TB_NIL;
2215 vcore->lpcr = kvm->arch.lpcr;
2216 vcore->first_vcpuid = id;
2218 INIT_LIST_HEAD(&vcore->preempt_list);
2223 #ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING
2224 static struct debugfs_timings_element {
2228 {"rm_entry", offsetof(struct kvm_vcpu, arch.rm_entry)},
2229 {"rm_intr", offsetof(struct kvm_vcpu, arch.rm_intr)},
2230 {"rm_exit", offsetof(struct kvm_vcpu, arch.rm_exit)},
2231 {"guest", offsetof(struct kvm_vcpu, arch.guest_time)},
2232 {"cede", offsetof(struct kvm_vcpu, arch.cede_time)},
2235 #define N_TIMINGS (ARRAY_SIZE(timings))
2237 struct debugfs_timings_state {
2238 struct kvm_vcpu *vcpu;
2239 unsigned int buflen;
2240 char buf[N_TIMINGS * 100];
2243 static int debugfs_timings_open(struct inode *inode, struct file *file)
2245 struct kvm_vcpu *vcpu = inode->i_private;
2246 struct debugfs_timings_state *p;
2248 p = kzalloc(sizeof(*p), GFP_KERNEL);
2252 kvm_get_kvm(vcpu->kvm);
2254 file->private_data = p;
2256 return nonseekable_open(inode, file);
2259 static int debugfs_timings_release(struct inode *inode, struct file *file)
2261 struct debugfs_timings_state *p = file->private_data;
2263 kvm_put_kvm(p->vcpu->kvm);
2268 static ssize_t debugfs_timings_read(struct file *file, char __user *buf,
2269 size_t len, loff_t *ppos)
2271 struct debugfs_timings_state *p = file->private_data;
2272 struct kvm_vcpu *vcpu = p->vcpu;
2274 struct kvmhv_tb_accumulator tb;
2283 buf_end = s + sizeof(p->buf);
2284 for (i = 0; i < N_TIMINGS; ++i) {
2285 struct kvmhv_tb_accumulator *acc;
2287 acc = (struct kvmhv_tb_accumulator *)
2288 ((unsigned long)vcpu + timings[i].offset);
2290 for (loops = 0; loops < 1000; ++loops) {
2291 count = acc->seqcount;
2296 if (count == acc->seqcount) {
2304 snprintf(s, buf_end - s, "%s: stuck\n",
2307 snprintf(s, buf_end - s,
2308 "%s: %llu %llu %llu %llu\n",
2309 timings[i].name, count / 2,
2310 tb_to_ns(tb.tb_total),
2311 tb_to_ns(tb.tb_min),
2312 tb_to_ns(tb.tb_max));
2315 p->buflen = s - p->buf;
2319 if (pos >= p->buflen)
2321 if (len > p->buflen - pos)
2322 len = p->buflen - pos;
2323 n = copy_to_user(buf, p->buf + pos, len);
2333 static ssize_t debugfs_timings_write(struct file *file, const char __user *buf,
2334 size_t len, loff_t *ppos)
2339 static const struct file_operations debugfs_timings_ops = {
2340 .owner = THIS_MODULE,
2341 .open = debugfs_timings_open,
2342 .release = debugfs_timings_release,
2343 .read = debugfs_timings_read,
2344 .write = debugfs_timings_write,
2345 .llseek = generic_file_llseek,
2348 /* Create a debugfs directory for the vcpu */
2349 static void debugfs_vcpu_init(struct kvm_vcpu *vcpu, unsigned int id)
2352 struct kvm *kvm = vcpu->kvm;
2354 snprintf(buf, sizeof(buf), "vcpu%u", id);
2355 vcpu->arch.debugfs_dir = debugfs_create_dir(buf, kvm->arch.debugfs_dir);
2356 debugfs_create_file("timings", 0444, vcpu->arch.debugfs_dir, vcpu,
2357 &debugfs_timings_ops);
2360 #else /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */
2361 static void debugfs_vcpu_init(struct kvm_vcpu *vcpu, unsigned int id)
2364 #endif /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */
2366 static int kvmppc_core_vcpu_create_hv(struct kvm_vcpu *vcpu)
2370 struct kvmppc_vcore *vcore;
2377 vcpu->arch.shared = &vcpu->arch.shregs;
2378 #ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE
2380 * The shared struct is never shared on HV,
2381 * so we can always use host endianness
2383 #ifdef __BIG_ENDIAN__
2384 vcpu->arch.shared_big_endian = true;
2386 vcpu->arch.shared_big_endian = false;
2389 vcpu->arch.mmcr[0] = MMCR0_FC;
2390 vcpu->arch.ctrl = CTRL_RUNLATCH;
2391 /* default to host PVR, since we can't spoof it */
2392 kvmppc_set_pvr_hv(vcpu, mfspr(SPRN_PVR));
2393 spin_lock_init(&vcpu->arch.vpa_update_lock);
2394 spin_lock_init(&vcpu->arch.tbacct_lock);
2395 vcpu->arch.busy_preempt = TB_NIL;
2396 vcpu->arch.intr_msr = MSR_SF | MSR_ME;
2399 * Set the default HFSCR for the guest from the host value.
2400 * This value is only used on POWER9.
2401 * On POWER9, we want to virtualize the doorbell facility, so we
2402 * don't set the HFSCR_MSGP bit, and that causes those instructions
2403 * to trap and then we emulate them.
2405 vcpu->arch.hfscr = HFSCR_TAR | HFSCR_EBB | HFSCR_PM | HFSCR_BHRB |
2406 HFSCR_DSCR | HFSCR_VECVSX | HFSCR_FP | HFSCR_PREFIX;
2407 if (cpu_has_feature(CPU_FTR_HVMODE)) {
2408 vcpu->arch.hfscr &= mfspr(SPRN_HFSCR);
2409 if (cpu_has_feature(CPU_FTR_P9_TM_HV_ASSIST))
2410 vcpu->arch.hfscr |= HFSCR_TM;
2412 if (cpu_has_feature(CPU_FTR_TM_COMP))
2413 vcpu->arch.hfscr |= HFSCR_TM;
2415 kvmppc_mmu_book3s_hv_init(vcpu);
2417 vcpu->arch.state = KVMPPC_VCPU_NOTREADY;
2419 init_waitqueue_head(&vcpu->arch.cpu_run);
2421 mutex_lock(&kvm->lock);
2424 if (cpu_has_feature(CPU_FTR_ARCH_300)) {
2425 if (id >= (KVM_MAX_VCPUS * kvm->arch.emul_smt_mode)) {
2426 pr_devel("KVM: VCPU ID too high\n");
2427 core = KVM_MAX_VCORES;
2429 BUG_ON(kvm->arch.smt_mode != 1);
2430 core = kvmppc_pack_vcpu_id(kvm, id);
2433 core = id / kvm->arch.smt_mode;
2435 if (core < KVM_MAX_VCORES) {
2436 vcore = kvm->arch.vcores[core];
2437 if (vcore && cpu_has_feature(CPU_FTR_ARCH_300)) {
2438 pr_devel("KVM: collision on id %u", id);
2440 } else if (!vcore) {
2442 * Take mmu_setup_lock for mutual exclusion
2443 * with kvmppc_update_lpcr().
2446 vcore = kvmppc_vcore_create(kvm,
2447 id & ~(kvm->arch.smt_mode - 1));
2448 mutex_lock(&kvm->arch.mmu_setup_lock);
2449 kvm->arch.vcores[core] = vcore;
2450 kvm->arch.online_vcores++;
2451 mutex_unlock(&kvm->arch.mmu_setup_lock);
2454 mutex_unlock(&kvm->lock);
2459 spin_lock(&vcore->lock);
2460 ++vcore->num_threads;
2461 spin_unlock(&vcore->lock);
2462 vcpu->arch.vcore = vcore;
2463 vcpu->arch.ptid = vcpu->vcpu_id - vcore->first_vcpuid;
2464 vcpu->arch.thread_cpu = -1;
2465 vcpu->arch.prev_cpu = -1;
2467 vcpu->arch.cpu_type = KVM_CPU_3S_64;
2468 kvmppc_sanity_check(vcpu);
2470 debugfs_vcpu_init(vcpu, id);
2475 static int kvmhv_set_smt_mode(struct kvm *kvm, unsigned long smt_mode,
2476 unsigned long flags)
2483 if (smt_mode > MAX_SMT_THREADS || !is_power_of_2(smt_mode))
2485 if (!cpu_has_feature(CPU_FTR_ARCH_300)) {
2487 * On POWER8 (or POWER7), the threading mode is "strict",
2488 * so we pack smt_mode vcpus per vcore.
2490 if (smt_mode > threads_per_subcore)
2494 * On POWER9, the threading mode is "loose",
2495 * so each vcpu gets its own vcore.
2500 mutex_lock(&kvm->lock);
2502 if (!kvm->arch.online_vcores) {
2503 kvm->arch.smt_mode = smt_mode;
2504 kvm->arch.emul_smt_mode = esmt;
2507 mutex_unlock(&kvm->lock);
2512 static void unpin_vpa(struct kvm *kvm, struct kvmppc_vpa *vpa)
2514 if (vpa->pinned_addr)
2515 kvmppc_unpin_guest_page(kvm, vpa->pinned_addr, vpa->gpa,
2519 static void kvmppc_core_vcpu_free_hv(struct kvm_vcpu *vcpu)
2521 spin_lock(&vcpu->arch.vpa_update_lock);
2522 unpin_vpa(vcpu->kvm, &vcpu->arch.dtl);
2523 unpin_vpa(vcpu->kvm, &vcpu->arch.slb_shadow);
2524 unpin_vpa(vcpu->kvm, &vcpu->arch.vpa);
2525 spin_unlock(&vcpu->arch.vpa_update_lock);
2528 static int kvmppc_core_check_requests_hv(struct kvm_vcpu *vcpu)
2530 /* Indicate we want to get back into the guest */
2534 static void kvmppc_set_timer(struct kvm_vcpu *vcpu)
2536 unsigned long dec_nsec, now;
2539 if (now > vcpu->arch.dec_expires) {
2540 /* decrementer has already gone negative */
2541 kvmppc_core_queue_dec(vcpu);
2542 kvmppc_core_prepare_to_enter(vcpu);
2545 dec_nsec = tb_to_ns(vcpu->arch.dec_expires - now);
2546 hrtimer_start(&vcpu->arch.dec_timer, dec_nsec, HRTIMER_MODE_REL);
2547 vcpu->arch.timer_running = 1;
2550 extern int __kvmppc_vcore_entry(void);
2552 static void kvmppc_remove_runnable(struct kvmppc_vcore *vc,
2553 struct kvm_vcpu *vcpu)
2557 if (vcpu->arch.state != KVMPPC_VCPU_RUNNABLE)
2559 spin_lock_irq(&vcpu->arch.tbacct_lock);
2561 vcpu->arch.busy_stolen += vcore_stolen_time(vc, now) -
2562 vcpu->arch.stolen_logged;
2563 vcpu->arch.busy_preempt = now;
2564 vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST;
2565 spin_unlock_irq(&vcpu->arch.tbacct_lock);
2567 WRITE_ONCE(vc->runnable_threads[vcpu->arch.ptid], NULL);
2570 static int kvmppc_grab_hwthread(int cpu)
2572 struct paca_struct *tpaca;
2573 long timeout = 10000;
2575 tpaca = paca_ptrs[cpu];
2577 /* Ensure the thread won't go into the kernel if it wakes */
2578 tpaca->kvm_hstate.kvm_vcpu = NULL;
2579 tpaca->kvm_hstate.kvm_vcore = NULL;
2580 tpaca->kvm_hstate.napping = 0;
2582 tpaca->kvm_hstate.hwthread_req = 1;
2585 * If the thread is already executing in the kernel (e.g. handling
2586 * a stray interrupt), wait for it to get back to nap mode.
2587 * The smp_mb() is to ensure that our setting of hwthread_req
2588 * is visible before we look at hwthread_state, so if this
2589 * races with the code at system_reset_pSeries and the thread
2590 * misses our setting of hwthread_req, we are sure to see its
2591 * setting of hwthread_state, and vice versa.
2594 while (tpaca->kvm_hstate.hwthread_state == KVM_HWTHREAD_IN_KERNEL) {
2595 if (--timeout <= 0) {
2596 pr_err("KVM: couldn't grab cpu %d\n", cpu);
2604 static void kvmppc_release_hwthread(int cpu)
2606 struct paca_struct *tpaca;
2608 tpaca = paca_ptrs[cpu];
2609 tpaca->kvm_hstate.hwthread_req = 0;
2610 tpaca->kvm_hstate.kvm_vcpu = NULL;
2611 tpaca->kvm_hstate.kvm_vcore = NULL;
2612 tpaca->kvm_hstate.kvm_split_mode = NULL;
2615 static void radix_flush_cpu(struct kvm *kvm, int cpu, struct kvm_vcpu *vcpu)
2617 struct kvm_nested_guest *nested = vcpu->arch.nested;
2618 cpumask_t *cpu_in_guest;
2621 cpu = cpu_first_thread_sibling(cpu);
2623 cpumask_set_cpu(cpu, &nested->need_tlb_flush);
2624 cpu_in_guest = &nested->cpu_in_guest;
2626 cpumask_set_cpu(cpu, &kvm->arch.need_tlb_flush);
2627 cpu_in_guest = &kvm->arch.cpu_in_guest;
2630 * Make sure setting of bit in need_tlb_flush precedes
2631 * testing of cpu_in_guest bits. The matching barrier on
2632 * the other side is the first smp_mb() in kvmppc_run_core().
2635 for (i = 0; i < threads_per_core; ++i)
2636 if (cpumask_test_cpu(cpu + i, cpu_in_guest))
2637 smp_call_function_single(cpu + i, do_nothing, NULL, 1);
2640 static void kvmppc_prepare_radix_vcpu(struct kvm_vcpu *vcpu, int pcpu)
2642 struct kvm_nested_guest *nested = vcpu->arch.nested;
2643 struct kvm *kvm = vcpu->kvm;
2646 if (!cpu_has_feature(CPU_FTR_HVMODE))
2650 prev_cpu = nested->prev_cpu[vcpu->arch.nested_vcpu_id];
2652 prev_cpu = vcpu->arch.prev_cpu;
2655 * With radix, the guest can do TLB invalidations itself,
2656 * and it could choose to use the local form (tlbiel) if
2657 * it is invalidating a translation that has only ever been
2658 * used on one vcpu. However, that doesn't mean it has
2659 * only ever been used on one physical cpu, since vcpus
2660 * can move around between pcpus. To cope with this, when
2661 * a vcpu moves from one pcpu to another, we need to tell
2662 * any vcpus running on the same core as this vcpu previously
2663 * ran to flush the TLB. The TLB is shared between threads,
2664 * so we use a single bit in .need_tlb_flush for all 4 threads.
2666 if (prev_cpu != pcpu) {
2667 if (prev_cpu >= 0 &&
2668 cpu_first_thread_sibling(prev_cpu) !=
2669 cpu_first_thread_sibling(pcpu))
2670 radix_flush_cpu(kvm, prev_cpu, vcpu);
2672 nested->prev_cpu[vcpu->arch.nested_vcpu_id] = pcpu;
2674 vcpu->arch.prev_cpu = pcpu;
2678 static void kvmppc_start_thread(struct kvm_vcpu *vcpu, struct kvmppc_vcore *vc)
2681 struct paca_struct *tpaca;
2682 struct kvm *kvm = vc->kvm;
2686 if (vcpu->arch.timer_running) {
2687 hrtimer_try_to_cancel(&vcpu->arch.dec_timer);
2688 vcpu->arch.timer_running = 0;
2690 cpu += vcpu->arch.ptid;
2691 vcpu->cpu = vc->pcpu;
2692 vcpu->arch.thread_cpu = cpu;
2693 cpumask_set_cpu(cpu, &kvm->arch.cpu_in_guest);
2695 tpaca = paca_ptrs[cpu];
2696 tpaca->kvm_hstate.kvm_vcpu = vcpu;
2697 tpaca->kvm_hstate.ptid = cpu - vc->pcpu;
2698 tpaca->kvm_hstate.fake_suspend = 0;
2699 /* Order stores to hstate.kvm_vcpu etc. before store to kvm_vcore */
2701 tpaca->kvm_hstate.kvm_vcore = vc;
2702 if (cpu != smp_processor_id())
2703 kvmppc_ipi_thread(cpu);
2706 static void kvmppc_wait_for_nap(int n_threads)
2708 int cpu = smp_processor_id();
2713 for (loops = 0; loops < 1000000; ++loops) {
2715 * Check if all threads are finished.
2716 * We set the vcore pointer when starting a thread
2717 * and the thread clears it when finished, so we look
2718 * for any threads that still have a non-NULL vcore ptr.
2720 for (i = 1; i < n_threads; ++i)
2721 if (paca_ptrs[cpu + i]->kvm_hstate.kvm_vcore)
2723 if (i == n_threads) {
2730 for (i = 1; i < n_threads; ++i)
2731 if (paca_ptrs[cpu + i]->kvm_hstate.kvm_vcore)
2732 pr_err("KVM: CPU %d seems to be stuck\n", cpu + i);
2736 * Check that we are on thread 0 and that any other threads in
2737 * this core are off-line. Then grab the threads so they can't
2740 static int on_primary_thread(void)
2742 int cpu = smp_processor_id();
2745 /* Are we on a primary subcore? */
2746 if (cpu_thread_in_subcore(cpu))
2750 while (++thr < threads_per_subcore)
2751 if (cpu_online(cpu + thr))
2754 /* Grab all hw threads so they can't go into the kernel */
2755 for (thr = 1; thr < threads_per_subcore; ++thr) {
2756 if (kvmppc_grab_hwthread(cpu + thr)) {
2757 /* Couldn't grab one; let the others go */
2759 kvmppc_release_hwthread(cpu + thr);
2760 } while (--thr > 0);
2768 * A list of virtual cores for each physical CPU.
2769 * These are vcores that could run but their runner VCPU tasks are
2770 * (or may be) preempted.
2772 struct preempted_vcore_list {
2773 struct list_head list;
2777 static DEFINE_PER_CPU(struct preempted_vcore_list, preempted_vcores);
2779 static void init_vcore_lists(void)
2783 for_each_possible_cpu(cpu) {
2784 struct preempted_vcore_list *lp = &per_cpu(preempted_vcores, cpu);
2785 spin_lock_init(&lp->lock);
2786 INIT_LIST_HEAD(&lp->list);
2790 static void kvmppc_vcore_preempt(struct kvmppc_vcore *vc)
2792 struct preempted_vcore_list *lp = this_cpu_ptr(&preempted_vcores);
2794 vc->vcore_state = VCORE_PREEMPT;
2795 vc->pcpu = smp_processor_id();
2796 if (vc->num_threads < threads_per_vcore(vc->kvm)) {
2797 spin_lock(&lp->lock);
2798 list_add_tail(&vc->preempt_list, &lp->list);
2799 spin_unlock(&lp->lock);
2802 /* Start accumulating stolen time */
2803 kvmppc_core_start_stolen(vc);
2806 static void kvmppc_vcore_end_preempt(struct kvmppc_vcore *vc)
2808 struct preempted_vcore_list *lp;
2810 kvmppc_core_end_stolen(vc);
2811 if (!list_empty(&vc->preempt_list)) {
2812 lp = &per_cpu(preempted_vcores, vc->pcpu);
2813 spin_lock(&lp->lock);
2814 list_del_init(&vc->preempt_list);
2815 spin_unlock(&lp->lock);
2817 vc->vcore_state = VCORE_INACTIVE;
2821 * This stores information about the virtual cores currently
2822 * assigned to a physical core.
2826 int max_subcore_threads;
2828 int subcore_threads[MAX_SUBCORES];
2829 struct kvmppc_vcore *vc[MAX_SUBCORES];
2833 * This mapping means subcores 0 and 1 can use threads 0-3 and 4-7
2834 * respectively in 2-way micro-threading (split-core) mode on POWER8.
2836 static int subcore_thread_map[MAX_SUBCORES] = { 0, 4, 2, 6 };
2838 static void init_core_info(struct core_info *cip, struct kvmppc_vcore *vc)
2840 memset(cip, 0, sizeof(*cip));
2841 cip->n_subcores = 1;
2842 cip->max_subcore_threads = vc->num_threads;
2843 cip->total_threads = vc->num_threads;
2844 cip->subcore_threads[0] = vc->num_threads;
2848 static bool subcore_config_ok(int n_subcores, int n_threads)
2851 * POWER9 "SMT4" cores are permanently in what is effectively a 4-way
2852 * split-core mode, with one thread per subcore.
2854 if (cpu_has_feature(CPU_FTR_ARCH_300))
2855 return n_subcores <= 4 && n_threads == 1;
2857 /* On POWER8, can only dynamically split if unsplit to begin with */
2858 if (n_subcores > 1 && threads_per_subcore < MAX_SMT_THREADS)
2860 if (n_subcores > MAX_SUBCORES)
2862 if (n_subcores > 1) {
2863 if (!(dynamic_mt_modes & 2))
2865 if (n_subcores > 2 && !(dynamic_mt_modes & 4))
2869 return n_subcores * roundup_pow_of_two(n_threads) <= MAX_SMT_THREADS;
2872 static void init_vcore_to_run(struct kvmppc_vcore *vc)
2874 vc->entry_exit_map = 0;
2876 vc->napping_threads = 0;
2877 vc->conferring_threads = 0;
2878 vc->tb_offset_applied = 0;
2881 static bool can_dynamic_split(struct kvmppc_vcore *vc, struct core_info *cip)
2883 int n_threads = vc->num_threads;
2886 if (!cpu_has_feature(CPU_FTR_ARCH_207S))
2889 /* In one_vm_per_core mode, require all vcores to be from the same vm */
2890 if (one_vm_per_core && vc->kvm != cip->vc[0]->kvm)
2893 if (n_threads < cip->max_subcore_threads)
2894 n_threads = cip->max_subcore_threads;
2895 if (!subcore_config_ok(cip->n_subcores + 1, n_threads))
2897 cip->max_subcore_threads = n_threads;
2899 sub = cip->n_subcores;
2901 cip->total_threads += vc->num_threads;
2902 cip->subcore_threads[sub] = vc->num_threads;
2904 init_vcore_to_run(vc);
2905 list_del_init(&vc->preempt_list);
2911 * Work out whether it is possible to piggyback the execution of
2912 * vcore *pvc onto the execution of the other vcores described in *cip.
2914 static bool can_piggyback(struct kvmppc_vcore *pvc, struct core_info *cip,
2917 if (cip->total_threads + pvc->num_threads > target_threads)
2920 return can_dynamic_split(pvc, cip);
2923 static void prepare_threads(struct kvmppc_vcore *vc)
2926 struct kvm_vcpu *vcpu;
2928 for_each_runnable_thread(i, vcpu, vc) {
2929 if (signal_pending(vcpu->arch.run_task))
2930 vcpu->arch.ret = -EINTR;
2931 else if (no_mixing_hpt_and_radix &&
2932 kvm_is_radix(vc->kvm) != radix_enabled())
2933 vcpu->arch.ret = -EINVAL;
2934 else if (vcpu->arch.vpa.update_pending ||
2935 vcpu->arch.slb_shadow.update_pending ||
2936 vcpu->arch.dtl.update_pending)
2937 vcpu->arch.ret = RESUME_GUEST;
2940 kvmppc_remove_runnable(vc, vcpu);
2941 wake_up(&vcpu->arch.cpu_run);
2945 static void collect_piggybacks(struct core_info *cip, int target_threads)
2947 struct preempted_vcore_list *lp = this_cpu_ptr(&preempted_vcores);
2948 struct kvmppc_vcore *pvc, *vcnext;
2950 spin_lock(&lp->lock);
2951 list_for_each_entry_safe(pvc, vcnext, &lp->list, preempt_list) {
2952 if (!spin_trylock(&pvc->lock))
2954 prepare_threads(pvc);
2955 if (!pvc->n_runnable || !pvc->kvm->arch.mmu_ready) {
2956 list_del_init(&pvc->preempt_list);
2957 if (pvc->runner == NULL) {
2958 pvc->vcore_state = VCORE_INACTIVE;
2959 kvmppc_core_end_stolen(pvc);
2961 spin_unlock(&pvc->lock);
2964 if (!can_piggyback(pvc, cip, target_threads)) {
2965 spin_unlock(&pvc->lock);
2968 kvmppc_core_end_stolen(pvc);
2969 pvc->vcore_state = VCORE_PIGGYBACK;
2970 if (cip->total_threads >= target_threads)
2973 spin_unlock(&lp->lock);
2976 static bool recheck_signals_and_mmu(struct core_info *cip)
2979 struct kvm_vcpu *vcpu;
2980 struct kvmppc_vcore *vc;
2982 for (sub = 0; sub < cip->n_subcores; ++sub) {
2984 if (!vc->kvm->arch.mmu_ready)
2986 for_each_runnable_thread(i, vcpu, vc)
2987 if (signal_pending(vcpu->arch.run_task))
2993 static void post_guest_process(struct kvmppc_vcore *vc, bool is_master)
2995 int still_running = 0, i;
2998 struct kvm_vcpu *vcpu;
3000 spin_lock(&vc->lock);
3002 for_each_runnable_thread(i, vcpu, vc) {
3004 * It's safe to unlock the vcore in the loop here, because
3005 * for_each_runnable_thread() is safe against removal of
3006 * the vcpu, and the vcore state is VCORE_EXITING here,
3007 * so any vcpus becoming runnable will have their arch.trap
3008 * set to zero and can't actually run in the guest.
3010 spin_unlock(&vc->lock);
3011 /* cancel pending dec exception if dec is positive */
3012 if (now < vcpu->arch.dec_expires &&
3013 kvmppc_core_pending_dec(vcpu))
3014 kvmppc_core_dequeue_dec(vcpu);
3016 trace_kvm_guest_exit(vcpu);
3019 if (vcpu->arch.trap)
3020 ret = kvmppc_handle_exit_hv(vcpu,
3021 vcpu->arch.run_task);
3023 vcpu->arch.ret = ret;
3024 vcpu->arch.trap = 0;
3026 spin_lock(&vc->lock);
3027 if (is_kvmppc_resume_guest(vcpu->arch.ret)) {
3028 if (vcpu->arch.pending_exceptions)
3029 kvmppc_core_prepare_to_enter(vcpu);
3030 if (vcpu->arch.ceded)
3031 kvmppc_set_timer(vcpu);
3035 kvmppc_remove_runnable(vc, vcpu);
3036 wake_up(&vcpu->arch.cpu_run);
3040 if (still_running > 0) {
3041 kvmppc_vcore_preempt(vc);
3042 } else if (vc->runner) {
3043 vc->vcore_state = VCORE_PREEMPT;
3044 kvmppc_core_start_stolen(vc);
3046 vc->vcore_state = VCORE_INACTIVE;
3048 if (vc->n_runnable > 0 && vc->runner == NULL) {
3049 /* make sure there's a candidate runner awake */
3051 vcpu = next_runnable_thread(vc, &i);
3052 wake_up(&vcpu->arch.cpu_run);
3055 spin_unlock(&vc->lock);
3059 * Clear core from the list of active host cores as we are about to
3060 * enter the guest. Only do this if it is the primary thread of the
3061 * core (not if a subcore) that is entering the guest.
3063 static inline int kvmppc_clear_host_core(unsigned int cpu)
3067 if (!kvmppc_host_rm_ops_hv || cpu_thread_in_core(cpu))
3070 * Memory barrier can be omitted here as we will do a smp_wmb()
3071 * later in kvmppc_start_thread and we need ensure that state is
3072 * visible to other CPUs only after we enter guest.
3074 core = cpu >> threads_shift;
3075 kvmppc_host_rm_ops_hv->rm_core[core].rm_state.in_host = 0;
3080 * Advertise this core as an active host core since we exited the guest
3081 * Only need to do this if it is the primary thread of the core that is
3084 static inline int kvmppc_set_host_core(unsigned int cpu)
3088 if (!kvmppc_host_rm_ops_hv || cpu_thread_in_core(cpu))
3092 * Memory barrier can be omitted here because we do a spin_unlock
3093 * immediately after this which provides the memory barrier.
3095 core = cpu >> threads_shift;
3096 kvmppc_host_rm_ops_hv->rm_core[core].rm_state.in_host = 1;
3100 static void set_irq_happened(int trap)
3103 case BOOK3S_INTERRUPT_EXTERNAL:
3104 local_paca->irq_happened |= PACA_IRQ_EE;
3106 case BOOK3S_INTERRUPT_H_DOORBELL:
3107 local_paca->irq_happened |= PACA_IRQ_DBELL;
3109 case BOOK3S_INTERRUPT_HMI:
3110 local_paca->irq_happened |= PACA_IRQ_HMI;
3112 case BOOK3S_INTERRUPT_SYSTEM_RESET:
3113 replay_system_reset();
3119 * Run a set of guest threads on a physical core.
3120 * Called with vc->lock held.
3122 static noinline void kvmppc_run_core(struct kvmppc_vcore *vc)
3124 struct kvm_vcpu *vcpu;
3127 struct core_info core_info;
3128 struct kvmppc_vcore *pvc;
3129 struct kvm_split_mode split_info, *sip;
3130 int split, subcore_size, active;
3133 unsigned long cmd_bit, stat_bit;
3136 int controlled_threads;
3141 * Remove from the list any threads that have a signal pending
3142 * or need a VPA update done
3144 prepare_threads(vc);
3146 /* if the runner is no longer runnable, let the caller pick a new one */
3147 if (vc->runner->arch.state != KVMPPC_VCPU_RUNNABLE)
3153 init_vcore_to_run(vc);
3154 vc->preempt_tb = TB_NIL;
3157 * Number of threads that we will be controlling: the same as
3158 * the number of threads per subcore, except on POWER9,
3159 * where it's 1 because the threads are (mostly) independent.
3161 controlled_threads = threads_per_vcore(vc->kvm);
3164 * Make sure we are running on primary threads, and that secondary
3165 * threads are offline. Also check if the number of threads in this
3166 * guest are greater than the current system threads per guest.
3167 * On POWER9, we need to be not in independent-threads mode if
3168 * this is a HPT guest on a radix host machine where the
3169 * CPU threads may not be in different MMU modes.
3171 if ((controlled_threads > 1) &&
3172 ((vc->num_threads > threads_per_subcore) || !on_primary_thread())) {
3173 for_each_runnable_thread(i, vcpu, vc) {
3174 vcpu->arch.ret = -EBUSY;
3175 kvmppc_remove_runnable(vc, vcpu);
3176 wake_up(&vcpu->arch.cpu_run);
3182 * See if we could run any other vcores on the physical core
3183 * along with this one.
3185 init_core_info(&core_info, vc);
3186 pcpu = smp_processor_id();
3187 target_threads = controlled_threads;
3188 if (target_smt_mode && target_smt_mode < target_threads)
3189 target_threads = target_smt_mode;
3190 if (vc->num_threads < target_threads)
3191 collect_piggybacks(&core_info, target_threads);
3194 * On radix, arrange for TLB flushing if necessary.
3195 * This has to be done before disabling interrupts since
3196 * it uses smp_call_function().
3198 pcpu = smp_processor_id();
3199 if (kvm_is_radix(vc->kvm)) {
3200 for (sub = 0; sub < core_info.n_subcores; ++sub)
3201 for_each_runnable_thread(i, vcpu, core_info.vc[sub])
3202 kvmppc_prepare_radix_vcpu(vcpu, pcpu);
3206 * Hard-disable interrupts, and check resched flag and signals.
3207 * If we need to reschedule or deliver a signal, clean up
3208 * and return without going into the guest(s).
3209 * If the mmu_ready flag has been cleared, don't go into the
3210 * guest because that means a HPT resize operation is in progress.
3212 local_irq_disable();
3214 if (lazy_irq_pending() || need_resched() ||
3215 recheck_signals_and_mmu(&core_info)) {
3217 vc->vcore_state = VCORE_INACTIVE;
3218 /* Unlock all except the primary vcore */
3219 for (sub = 1; sub < core_info.n_subcores; ++sub) {
3220 pvc = core_info.vc[sub];
3221 /* Put back on to the preempted vcores list */
3222 kvmppc_vcore_preempt(pvc);
3223 spin_unlock(&pvc->lock);
3225 for (i = 0; i < controlled_threads; ++i)
3226 kvmppc_release_hwthread(pcpu + i);
3230 kvmppc_clear_host_core(pcpu);
3232 /* Decide on micro-threading (split-core) mode */
3233 subcore_size = threads_per_subcore;
3234 cmd_bit = stat_bit = 0;
3235 split = core_info.n_subcores;
3237 is_power8 = cpu_has_feature(CPU_FTR_ARCH_207S)
3238 && !cpu_has_feature(CPU_FTR_ARCH_300);
3242 memset(&split_info, 0, sizeof(split_info));
3243 for (sub = 0; sub < core_info.n_subcores; ++sub)
3244 split_info.vc[sub] = core_info.vc[sub];
3247 if (split == 2 && (dynamic_mt_modes & 2)) {
3248 cmd_bit = HID0_POWER8_1TO2LPAR;
3249 stat_bit = HID0_POWER8_2LPARMODE;
3252 cmd_bit = HID0_POWER8_1TO4LPAR;
3253 stat_bit = HID0_POWER8_4LPARMODE;
3255 subcore_size = MAX_SMT_THREADS / split;
3256 split_info.rpr = mfspr(SPRN_RPR);
3257 split_info.pmmar = mfspr(SPRN_PMMAR);
3258 split_info.ldbar = mfspr(SPRN_LDBAR);
3259 split_info.subcore_size = subcore_size;
3261 split_info.subcore_size = 1;
3264 /* order writes to split_info before kvm_split_mode pointer */
3268 for (thr = 0; thr < controlled_threads; ++thr) {
3269 struct paca_struct *paca = paca_ptrs[pcpu + thr];
3271 paca->kvm_hstate.napping = 0;
3272 paca->kvm_hstate.kvm_split_mode = sip;
3275 /* Initiate micro-threading (split-core) on POWER8 if required */
3277 unsigned long hid0 = mfspr(SPRN_HID0);
3279 hid0 |= cmd_bit | HID0_POWER8_DYNLPARDIS;
3281 mtspr(SPRN_HID0, hid0);
3284 hid0 = mfspr(SPRN_HID0);
3285 if (hid0 & stat_bit)
3292 * On POWER8, set RWMR register.
3293 * Since it only affects PURR and SPURR, it doesn't affect
3294 * the host, so we don't save/restore the host value.
3297 unsigned long rwmr_val = RWMR_RPA_P8_8THREAD;
3298 int n_online = atomic_read(&vc->online_count);
3301 * Use the 8-thread value if we're doing split-core
3302 * or if the vcore's online count looks bogus.
3304 if (split == 1 && threads_per_subcore == MAX_SMT_THREADS &&
3305 n_online >= 1 && n_online <= MAX_SMT_THREADS)
3306 rwmr_val = p8_rwmr_values[n_online];
3307 mtspr(SPRN_RWMR, rwmr_val);
3310 /* Start all the threads */
3312 for (sub = 0; sub < core_info.n_subcores; ++sub) {
3313 thr = is_power8 ? subcore_thread_map[sub] : sub;
3316 pvc = core_info.vc[sub];
3317 pvc->pcpu = pcpu + thr;
3318 for_each_runnable_thread(i, vcpu, pvc) {
3319 kvmppc_start_thread(vcpu, pvc);
3320 kvmppc_create_dtl_entry(vcpu, pvc);
3321 trace_kvm_guest_enter(vcpu);
3322 if (!vcpu->arch.ptid)
3324 active |= 1 << (thr + vcpu->arch.ptid);
3327 * We need to start the first thread of each subcore
3328 * even if it doesn't have a vcpu.
3331 kvmppc_start_thread(NULL, pvc);
3335 * Ensure that split_info.do_nap is set after setting
3336 * the vcore pointer in the PACA of the secondaries.
3341 * When doing micro-threading, poke the inactive threads as well.
3342 * This gets them to the nap instruction after kvm_do_nap,
3343 * which reduces the time taken to unsplit later.
3346 split_info.do_nap = 1; /* ask secondaries to nap when done */
3347 for (thr = 1; thr < threads_per_subcore; ++thr)
3348 if (!(active & (1 << thr)))
3349 kvmppc_ipi_thread(pcpu + thr);
3352 vc->vcore_state = VCORE_RUNNING;
3355 trace_kvmppc_run_core(vc, 0);
3357 for (sub = 0; sub < core_info.n_subcores; ++sub)
3358 spin_unlock(&core_info.vc[sub]->lock);
3360 guest_enter_irqoff();
3362 srcu_idx = srcu_read_lock(&vc->kvm->srcu);
3364 this_cpu_disable_ftrace();
3367 * Interrupts will be enabled once we get into the guest,
3368 * so tell lockdep that we're about to enable interrupts.
3370 trace_hardirqs_on();
3372 trap = __kvmppc_vcore_entry();
3374 trace_hardirqs_off();
3376 this_cpu_enable_ftrace();
3378 srcu_read_unlock(&vc->kvm->srcu, srcu_idx);
3380 set_irq_happened(trap);
3382 spin_lock(&vc->lock);
3383 /* prevent other vcpu threads from doing kvmppc_start_thread() now */
3384 vc->vcore_state = VCORE_EXITING;
3386 /* wait for secondary threads to finish writing their state to memory */
3387 kvmppc_wait_for_nap(controlled_threads);
3389 /* Return to whole-core mode if we split the core earlier */
3391 unsigned long hid0 = mfspr(SPRN_HID0);
3392 unsigned long loops = 0;
3394 hid0 &= ~HID0_POWER8_DYNLPARDIS;
3395 stat_bit = HID0_POWER8_2LPARMODE | HID0_POWER8_4LPARMODE;
3397 mtspr(SPRN_HID0, hid0);
3400 hid0 = mfspr(SPRN_HID0);
3401 if (!(hid0 & stat_bit))
3406 split_info.do_nap = 0;
3409 kvmppc_set_host_core(pcpu);
3414 /* Let secondaries go back to the offline loop */
3415 for (i = 0; i < controlled_threads; ++i) {
3416 kvmppc_release_hwthread(pcpu + i);
3417 if (sip && sip->napped[i])
3418 kvmppc_ipi_thread(pcpu + i);
3419 cpumask_clear_cpu(pcpu + i, &vc->kvm->arch.cpu_in_guest);
3422 spin_unlock(&vc->lock);
3424 /* make sure updates to secondary vcpu structs are visible now */
3429 for (sub = 0; sub < core_info.n_subcores; ++sub) {
3430 pvc = core_info.vc[sub];
3431 post_guest_process(pvc, pvc == vc);
3434 spin_lock(&vc->lock);
3437 vc->vcore_state = VCORE_INACTIVE;
3438 trace_kvmppc_run_core(vc, 1);
3442 * Load up hypervisor-mode registers on P9.
3444 static int kvmhv_load_hv_regs_and_go(struct kvm_vcpu *vcpu, u64 time_limit,
3447 struct kvmppc_vcore *vc = vcpu->arch.vcore;
3449 u64 tb, purr, spurr;
3451 unsigned long host_hfscr = mfspr(SPRN_HFSCR);
3452 unsigned long host_ciabr = mfspr(SPRN_CIABR);
3453 unsigned long host_dawr0 = mfspr(SPRN_DAWR0);
3454 unsigned long host_dawrx0 = mfspr(SPRN_DAWRX0);
3455 unsigned long host_psscr = mfspr(SPRN_PSSCR);
3456 unsigned long host_pidr = mfspr(SPRN_PID);
3457 unsigned long host_dawr1 = 0;
3458 unsigned long host_dawrx1 = 0;
3460 if (cpu_has_feature(CPU_FTR_DAWR1)) {
3461 host_dawr1 = mfspr(SPRN_DAWR1);
3462 host_dawrx1 = mfspr(SPRN_DAWRX1);
3466 * P8 and P9 suppress the HDEC exception when LPCR[HDICE] = 0,
3467 * so set HDICE before writing HDEC.
3469 mtspr(SPRN_LPCR, vcpu->kvm->arch.host_lpcr | LPCR_HDICE);
3472 hdec = time_limit - mftb();
3474 mtspr(SPRN_LPCR, vcpu->kvm->arch.host_lpcr);
3476 return BOOK3S_INTERRUPT_HV_DECREMENTER;
3478 mtspr(SPRN_HDEC, hdec);
3480 if (vc->tb_offset) {
3481 u64 new_tb = mftb() + vc->tb_offset;
3482 mtspr(SPRN_TBU40, new_tb);
3484 if ((tb & 0xffffff) < (new_tb & 0xffffff))
3485 mtspr(SPRN_TBU40, new_tb + 0x1000000);
3486 vc->tb_offset_applied = vc->tb_offset;
3490 mtspr(SPRN_PCR, vc->pcr | PCR_MASK);
3491 mtspr(SPRN_DPDES, vc->dpdes);
3492 mtspr(SPRN_VTB, vc->vtb);
3494 local_paca->kvm_hstate.host_purr = mfspr(SPRN_PURR);
3495 local_paca->kvm_hstate.host_spurr = mfspr(SPRN_SPURR);
3496 mtspr(SPRN_PURR, vcpu->arch.purr);
3497 mtspr(SPRN_SPURR, vcpu->arch.spurr);
3499 if (dawr_enabled()) {
3500 mtspr(SPRN_DAWR0, vcpu->arch.dawr0);
3501 mtspr(SPRN_DAWRX0, vcpu->arch.dawrx0);
3502 if (cpu_has_feature(CPU_FTR_DAWR1)) {
3503 mtspr(SPRN_DAWR1, vcpu->arch.dawr1);
3504 mtspr(SPRN_DAWRX1, vcpu->arch.dawrx1);
3507 mtspr(SPRN_CIABR, vcpu->arch.ciabr);
3508 mtspr(SPRN_IC, vcpu->arch.ic);
3509 mtspr(SPRN_PID, vcpu->arch.pid);
3511 mtspr(SPRN_PSSCR, vcpu->arch.psscr | PSSCR_EC |
3512 (local_paca->kvm_hstate.fake_suspend << PSSCR_FAKE_SUSPEND_LG));
3514 mtspr(SPRN_HFSCR, vcpu->arch.hfscr);
3516 mtspr(SPRN_SPRG0, vcpu->arch.shregs.sprg0);
3517 mtspr(SPRN_SPRG1, vcpu->arch.shregs.sprg1);
3518 mtspr(SPRN_SPRG2, vcpu->arch.shregs.sprg2);
3519 mtspr(SPRN_SPRG3, vcpu->arch.shregs.sprg3);
3521 mtspr(SPRN_AMOR, ~0UL);
3523 mtspr(SPRN_LPCR, lpcr);
3526 kvmppc_xive_push_vcpu(vcpu);
3528 mtspr(SPRN_SRR0, vcpu->arch.shregs.srr0);
3529 mtspr(SPRN_SRR1, vcpu->arch.shregs.srr1);
3531 trap = __kvmhv_vcpu_entry_p9(vcpu);
3533 /* Advance host PURR/SPURR by the amount used by guest */
3534 purr = mfspr(SPRN_PURR);
3535 spurr = mfspr(SPRN_SPURR);
3536 mtspr(SPRN_PURR, local_paca->kvm_hstate.host_purr +
3537 purr - vcpu->arch.purr);
3538 mtspr(SPRN_SPURR, local_paca->kvm_hstate.host_spurr +
3539 spurr - vcpu->arch.spurr);
3540 vcpu->arch.purr = purr;
3541 vcpu->arch.spurr = spurr;
3543 vcpu->arch.ic = mfspr(SPRN_IC);
3544 vcpu->arch.pid = mfspr(SPRN_PID);
3545 vcpu->arch.psscr = mfspr(SPRN_PSSCR) & PSSCR_GUEST_VIS;
3547 vcpu->arch.shregs.sprg0 = mfspr(SPRN_SPRG0);
3548 vcpu->arch.shregs.sprg1 = mfspr(SPRN_SPRG1);
3549 vcpu->arch.shregs.sprg2 = mfspr(SPRN_SPRG2);
3550 vcpu->arch.shregs.sprg3 = mfspr(SPRN_SPRG3);
3552 /* Preserve PSSCR[FAKE_SUSPEND] until we've called kvmppc_save_tm_hv */
3553 mtspr(SPRN_PSSCR, host_psscr |
3554 (local_paca->kvm_hstate.fake_suspend << PSSCR_FAKE_SUSPEND_LG));
3555 mtspr(SPRN_HFSCR, host_hfscr);
3556 mtspr(SPRN_CIABR, host_ciabr);
3557 mtspr(SPRN_DAWR0, host_dawr0);
3558 mtspr(SPRN_DAWRX0, host_dawrx0);
3559 if (cpu_has_feature(CPU_FTR_DAWR1)) {
3560 mtspr(SPRN_DAWR1, host_dawr1);
3561 mtspr(SPRN_DAWRX1, host_dawrx1);
3563 mtspr(SPRN_PID, host_pidr);
3566 * Since this is radix, do a eieio; tlbsync; ptesync sequence in
3567 * case we interrupted the guest between a tlbie and a ptesync.
3569 asm volatile("eieio; tlbsync; ptesync");
3572 * cp_abort is required if the processor supports local copy-paste
3573 * to clear the copy buffer that was under control of the guest.
3575 if (cpu_has_feature(CPU_FTR_ARCH_31))
3576 asm volatile(PPC_CP_ABORT);
3578 mtspr(SPRN_LPID, vcpu->kvm->arch.host_lpid); /* restore host LPID */
3581 vc->dpdes = mfspr(SPRN_DPDES);
3582 vc->vtb = mfspr(SPRN_VTB);
3583 mtspr(SPRN_DPDES, 0);
3585 mtspr(SPRN_PCR, PCR_MASK);
3587 if (vc->tb_offset_applied) {
3588 u64 new_tb = mftb() - vc->tb_offset_applied;
3589 mtspr(SPRN_TBU40, new_tb);
3591 if ((tb & 0xffffff) < (new_tb & 0xffffff))
3592 mtspr(SPRN_TBU40, new_tb + 0x1000000);
3593 vc->tb_offset_applied = 0;
3596 mtspr(SPRN_HDEC, 0x7fffffff);
3597 mtspr(SPRN_LPCR, vcpu->kvm->arch.host_lpcr);
3603 * Virtual-mode guest entry for POWER9 and later when the host and
3604 * guest are both using the radix MMU. The LPIDR has already been set.
3606 static int kvmhv_p9_guest_entry(struct kvm_vcpu *vcpu, u64 time_limit,
3609 struct kvmppc_vcore *vc = vcpu->arch.vcore;
3610 unsigned long host_dscr = mfspr(SPRN_DSCR);
3611 unsigned long host_tidr = mfspr(SPRN_TIDR);
3612 unsigned long host_iamr = mfspr(SPRN_IAMR);
3613 unsigned long host_amr = mfspr(SPRN_AMR);
3614 unsigned long host_fscr = mfspr(SPRN_FSCR);
3619 dec = mfspr(SPRN_DEC);
3622 return BOOK3S_INTERRUPT_HV_DECREMENTER;
3623 local_paca->kvm_hstate.dec_expires = dec + tb;
3624 if (local_paca->kvm_hstate.dec_expires < time_limit)
3625 time_limit = local_paca->kvm_hstate.dec_expires;
3627 vcpu->arch.ceded = 0;
3629 kvmhv_save_host_pmu(); /* saves it to PACA kvm_hstate */
3631 kvmppc_subcore_enter_guest();
3633 vc->entry_exit_map = 1;
3636 if (vcpu->arch.vpa.pinned_addr) {
3637 struct lppaca *lp = vcpu->arch.vpa.pinned_addr;
3638 u32 yield_count = be32_to_cpu(lp->yield_count) + 1;
3639 lp->yield_count = cpu_to_be32(yield_count);
3640 vcpu->arch.vpa.dirty = 1;
3643 if (cpu_has_feature(CPU_FTR_TM) ||
3644 cpu_has_feature(CPU_FTR_P9_TM_HV_ASSIST))
3645 kvmppc_restore_tm_hv(vcpu, vcpu->arch.shregs.msr, true);
3647 kvmhv_load_guest_pmu(vcpu);
3649 msr_check_and_set(MSR_FP | MSR_VEC | MSR_VSX);
3650 load_fp_state(&vcpu->arch.fp);
3651 #ifdef CONFIG_ALTIVEC
3652 load_vr_state(&vcpu->arch.vr);
3654 mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
3656 mtspr(SPRN_DSCR, vcpu->arch.dscr);
3657 mtspr(SPRN_IAMR, vcpu->arch.iamr);
3658 mtspr(SPRN_PSPB, vcpu->arch.pspb);
3659 mtspr(SPRN_FSCR, vcpu->arch.fscr);
3660 mtspr(SPRN_TAR, vcpu->arch.tar);
3661 mtspr(SPRN_EBBHR, vcpu->arch.ebbhr);
3662 mtspr(SPRN_EBBRR, vcpu->arch.ebbrr);
3663 mtspr(SPRN_BESCR, vcpu->arch.bescr);
3664 mtspr(SPRN_WORT, vcpu->arch.wort);
3665 mtspr(SPRN_TIDR, vcpu->arch.tid);
3666 mtspr(SPRN_DAR, vcpu->arch.shregs.dar);
3667 mtspr(SPRN_DSISR, vcpu->arch.shregs.dsisr);
3668 mtspr(SPRN_AMR, vcpu->arch.amr);
3669 mtspr(SPRN_UAMOR, vcpu->arch.uamor);
3671 if (!(vcpu->arch.ctrl & 1))
3672 mtspr(SPRN_CTRLT, mfspr(SPRN_CTRLF) & ~1);
3674 mtspr(SPRN_DEC, vcpu->arch.dec_expires - mftb());
3676 if (kvmhv_on_pseries()) {
3678 * We need to save and restore the guest visible part of the
3679 * psscr (i.e. using SPRN_PSSCR_PR) since the hypervisor
3680 * doesn't do this for us. Note only required if pseries since
3681 * this is done in kvmhv_load_hv_regs_and_go() below otherwise.
3683 unsigned long host_psscr;
3684 /* call our hypervisor to load up HV regs and go */
3685 struct hv_guest_state hvregs;
3687 host_psscr = mfspr(SPRN_PSSCR_PR);
3688 mtspr(SPRN_PSSCR_PR, vcpu->arch.psscr);
3689 kvmhv_save_hv_regs(vcpu, &hvregs);
3691 vcpu->arch.regs.msr = vcpu->arch.shregs.msr;
3692 hvregs.version = HV_GUEST_STATE_VERSION;
3693 if (vcpu->arch.nested) {
3694 hvregs.lpid = vcpu->arch.nested->shadow_lpid;
3695 hvregs.vcpu_token = vcpu->arch.nested_vcpu_id;
3697 hvregs.lpid = vcpu->kvm->arch.lpid;
3698 hvregs.vcpu_token = vcpu->vcpu_id;
3700 hvregs.hdec_expiry = time_limit;
3701 trap = plpar_hcall_norets(H_ENTER_NESTED, __pa(&hvregs),
3702 __pa(&vcpu->arch.regs));
3703 kvmhv_restore_hv_return_state(vcpu, &hvregs);
3704 vcpu->arch.shregs.msr = vcpu->arch.regs.msr;
3705 vcpu->arch.shregs.dar = mfspr(SPRN_DAR);
3706 vcpu->arch.shregs.dsisr = mfspr(SPRN_DSISR);
3707 vcpu->arch.psscr = mfspr(SPRN_PSSCR_PR);
3708 mtspr(SPRN_PSSCR_PR, host_psscr);
3710 /* H_CEDE has to be handled now, not later */
3711 if (trap == BOOK3S_INTERRUPT_SYSCALL && !vcpu->arch.nested &&
3712 kvmppc_get_gpr(vcpu, 3) == H_CEDE) {
3713 kvmppc_nested_cede(vcpu);
3714 kvmppc_set_gpr(vcpu, 3, 0);
3718 trap = kvmhv_load_hv_regs_and_go(vcpu, time_limit, lpcr);
3721 vcpu->arch.slb_max = 0;
3722 dec = mfspr(SPRN_DEC);
3723 if (!(lpcr & LPCR_LD)) /* Sign extend if not using large decrementer */
3726 vcpu->arch.dec_expires = dec + tb;
3728 vcpu->arch.thread_cpu = -1;
3729 vcpu->arch.ctrl = mfspr(SPRN_CTRLF);
3731 vcpu->arch.iamr = mfspr(SPRN_IAMR);
3732 vcpu->arch.pspb = mfspr(SPRN_PSPB);
3733 vcpu->arch.fscr = mfspr(SPRN_FSCR);
3734 vcpu->arch.tar = mfspr(SPRN_TAR);
3735 vcpu->arch.ebbhr = mfspr(SPRN_EBBHR);
3736 vcpu->arch.ebbrr = mfspr(SPRN_EBBRR);
3737 vcpu->arch.bescr = mfspr(SPRN_BESCR);
3738 vcpu->arch.wort = mfspr(SPRN_WORT);
3739 vcpu->arch.tid = mfspr(SPRN_TIDR);
3740 vcpu->arch.amr = mfspr(SPRN_AMR);
3741 vcpu->arch.uamor = mfspr(SPRN_UAMOR);
3742 vcpu->arch.dscr = mfspr(SPRN_DSCR);
3744 mtspr(SPRN_PSPB, 0);
3745 mtspr(SPRN_WORT, 0);
3746 mtspr(SPRN_UAMOR, 0);
3747 mtspr(SPRN_DSCR, host_dscr);
3748 mtspr(SPRN_TIDR, host_tidr);
3749 mtspr(SPRN_IAMR, host_iamr);
3750 mtspr(SPRN_PSPB, 0);
3752 if (host_amr != vcpu->arch.amr)
3753 mtspr(SPRN_AMR, host_amr);
3755 if (host_fscr != vcpu->arch.fscr)
3756 mtspr(SPRN_FSCR, host_fscr);
3758 msr_check_and_set(MSR_FP | MSR_VEC | MSR_VSX);
3759 store_fp_state(&vcpu->arch.fp);
3760 #ifdef CONFIG_ALTIVEC
3761 store_vr_state(&vcpu->arch.vr);
3763 vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
3765 if (cpu_has_feature(CPU_FTR_TM) ||
3766 cpu_has_feature(CPU_FTR_P9_TM_HV_ASSIST))
3767 kvmppc_save_tm_hv(vcpu, vcpu->arch.shregs.msr, true);
3770 if (vcpu->arch.vpa.pinned_addr) {
3771 struct lppaca *lp = vcpu->arch.vpa.pinned_addr;
3772 u32 yield_count = be32_to_cpu(lp->yield_count) + 1;
3773 lp->yield_count = cpu_to_be32(yield_count);
3774 vcpu->arch.vpa.dirty = 1;
3775 save_pmu = lp->pmcregs_in_use;
3777 /* Must save pmu if this guest is capable of running nested guests */
3778 save_pmu |= nesting_enabled(vcpu->kvm);
3780 kvmhv_save_guest_pmu(vcpu, save_pmu);
3782 vc->entry_exit_map = 0x101;
3785 mtspr(SPRN_DEC, local_paca->kvm_hstate.dec_expires - mftb());
3786 mtspr(SPRN_SPRG_VDSO_WRITE, local_paca->sprg_vdso);
3788 kvmhv_load_host_pmu();
3790 kvmppc_subcore_exit_guest();
3796 * Wait for some other vcpu thread to execute us, and
3797 * wake us up when we need to handle something in the host.
3799 static void kvmppc_wait_for_exec(struct kvmppc_vcore *vc,
3800 struct kvm_vcpu *vcpu, int wait_state)
3804 prepare_to_wait(&vcpu->arch.cpu_run, &wait, wait_state);
3805 if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) {
3806 spin_unlock(&vc->lock);
3808 spin_lock(&vc->lock);
3810 finish_wait(&vcpu->arch.cpu_run, &wait);
3813 static void grow_halt_poll_ns(struct kvmppc_vcore *vc)
3815 if (!halt_poll_ns_grow)
3818 vc->halt_poll_ns *= halt_poll_ns_grow;
3819 if (vc->halt_poll_ns < halt_poll_ns_grow_start)
3820 vc->halt_poll_ns = halt_poll_ns_grow_start;
3823 static void shrink_halt_poll_ns(struct kvmppc_vcore *vc)
3825 if (halt_poll_ns_shrink == 0)
3826 vc->halt_poll_ns = 0;
3828 vc->halt_poll_ns /= halt_poll_ns_shrink;
3831 #ifdef CONFIG_KVM_XICS
3832 static inline bool xive_interrupt_pending(struct kvm_vcpu *vcpu)
3834 if (!xics_on_xive())
3836 return vcpu->arch.irq_pending || vcpu->arch.xive_saved_state.pipr <
3837 vcpu->arch.xive_saved_state.cppr;
3840 static inline bool xive_interrupt_pending(struct kvm_vcpu *vcpu)
3844 #endif /* CONFIG_KVM_XICS */
3846 static bool kvmppc_vcpu_woken(struct kvm_vcpu *vcpu)
3848 if (vcpu->arch.pending_exceptions || vcpu->arch.prodded ||
3849 kvmppc_doorbell_pending(vcpu) || xive_interrupt_pending(vcpu))
3856 * Check to see if any of the runnable vcpus on the vcore have pending
3857 * exceptions or are no longer ceded
3859 static int kvmppc_vcore_check_block(struct kvmppc_vcore *vc)
3861 struct kvm_vcpu *vcpu;
3864 for_each_runnable_thread(i, vcpu, vc) {
3865 if (!vcpu->arch.ceded || kvmppc_vcpu_woken(vcpu))
3873 * All the vcpus in this vcore are idle, so wait for a decrementer
3874 * or external interrupt to one of the vcpus. vc->lock is held.
3876 static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc)
3878 ktime_t cur, start_poll, start_wait;
3882 /* Poll for pending exceptions and ceded state */
3883 cur = start_poll = ktime_get();
3884 if (vc->halt_poll_ns) {
3885 ktime_t stop = ktime_add_ns(start_poll, vc->halt_poll_ns);
3886 ++vc->runner->stat.halt_attempted_poll;
3888 vc->vcore_state = VCORE_POLLING;
3889 spin_unlock(&vc->lock);
3892 if (kvmppc_vcore_check_block(vc)) {
3897 } while (single_task_running() && ktime_before(cur, stop));
3899 spin_lock(&vc->lock);
3900 vc->vcore_state = VCORE_INACTIVE;
3903 ++vc->runner->stat.halt_successful_poll;
3908 prepare_to_rcuwait(&vc->wait);
3909 set_current_state(TASK_INTERRUPTIBLE);
3910 if (kvmppc_vcore_check_block(vc)) {
3911 finish_rcuwait(&vc->wait);
3913 /* If we polled, count this as a successful poll */
3914 if (vc->halt_poll_ns)
3915 ++vc->runner->stat.halt_successful_poll;
3919 start_wait = ktime_get();
3921 vc->vcore_state = VCORE_SLEEPING;
3922 trace_kvmppc_vcore_blocked(vc, 0);
3923 spin_unlock(&vc->lock);
3925 finish_rcuwait(&vc->wait);
3926 spin_lock(&vc->lock);
3927 vc->vcore_state = VCORE_INACTIVE;
3928 trace_kvmppc_vcore_blocked(vc, 1);
3929 ++vc->runner->stat.halt_successful_wait;
3934 block_ns = ktime_to_ns(cur) - ktime_to_ns(start_poll);
3936 /* Attribute wait time */
3938 vc->runner->stat.halt_wait_ns +=
3939 ktime_to_ns(cur) - ktime_to_ns(start_wait);
3940 /* Attribute failed poll time */
3941 if (vc->halt_poll_ns)
3942 vc->runner->stat.halt_poll_fail_ns +=
3943 ktime_to_ns(start_wait) -
3944 ktime_to_ns(start_poll);
3946 /* Attribute successful poll time */
3947 if (vc->halt_poll_ns)
3948 vc->runner->stat.halt_poll_success_ns +=
3950 ktime_to_ns(start_poll);
3953 /* Adjust poll time */
3955 if (block_ns <= vc->halt_poll_ns)
3957 /* We slept and blocked for longer than the max halt time */
3958 else if (vc->halt_poll_ns && block_ns > halt_poll_ns)
3959 shrink_halt_poll_ns(vc);
3960 /* We slept and our poll time is too small */
3961 else if (vc->halt_poll_ns < halt_poll_ns &&
3962 block_ns < halt_poll_ns)
3963 grow_halt_poll_ns(vc);
3964 if (vc->halt_poll_ns > halt_poll_ns)
3965 vc->halt_poll_ns = halt_poll_ns;
3967 vc->halt_poll_ns = 0;
3969 trace_kvmppc_vcore_wakeup(do_sleep, block_ns);
3973 * This never fails for a radix guest, as none of the operations it does
3974 * for a radix guest can fail or have a way to report failure.
3975 * kvmhv_run_single_vcpu() relies on this fact.
3977 static int kvmhv_setup_mmu(struct kvm_vcpu *vcpu)
3980 struct kvm *kvm = vcpu->kvm;
3982 mutex_lock(&kvm->arch.mmu_setup_lock);
3983 if (!kvm->arch.mmu_ready) {
3984 if (!kvm_is_radix(kvm))
3985 r = kvmppc_hv_setup_htab_rma(vcpu);
3987 if (cpu_has_feature(CPU_FTR_ARCH_300))
3988 kvmppc_setup_partition_table(kvm);
3989 kvm->arch.mmu_ready = 1;
3992 mutex_unlock(&kvm->arch.mmu_setup_lock);
3996 static int kvmppc_run_vcpu(struct kvm_vcpu *vcpu)
3998 struct kvm_run *run = vcpu->run;
4000 struct kvmppc_vcore *vc;
4003 trace_kvmppc_run_vcpu_enter(vcpu);
4005 run->exit_reason = 0;
4006 vcpu->arch.ret = RESUME_GUEST;
4007 vcpu->arch.trap = 0;
4008 kvmppc_update_vpas(vcpu);
4011 * Synchronize with other threads in this virtual core
4013 vc = vcpu->arch.vcore;
4014 spin_lock(&vc->lock);
4015 vcpu->arch.ceded = 0;
4016 vcpu->arch.run_task = current;
4017 vcpu->arch.stolen_logged = vcore_stolen_time(vc, mftb());
4018 vcpu->arch.state = KVMPPC_VCPU_RUNNABLE;
4019 vcpu->arch.busy_preempt = TB_NIL;
4020 WRITE_ONCE(vc->runnable_threads[vcpu->arch.ptid], vcpu);
4024 * This happens the first time this is called for a vcpu.
4025 * If the vcore is already running, we may be able to start
4026 * this thread straight away and have it join in.
4028 if (!signal_pending(current)) {
4029 if ((vc->vcore_state == VCORE_PIGGYBACK ||
4030 vc->vcore_state == VCORE_RUNNING) &&
4031 !VCORE_IS_EXITING(vc)) {
4032 kvmppc_create_dtl_entry(vcpu, vc);
4033 kvmppc_start_thread(vcpu, vc);
4034 trace_kvm_guest_enter(vcpu);
4035 } else if (vc->vcore_state == VCORE_SLEEPING) {
4036 rcuwait_wake_up(&vc->wait);
4041 while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE &&
4042 !signal_pending(current)) {
4043 /* See if the MMU is ready to go */
4044 if (!vcpu->kvm->arch.mmu_ready) {
4045 spin_unlock(&vc->lock);
4046 r = kvmhv_setup_mmu(vcpu);
4047 spin_lock(&vc->lock);
4049 run->exit_reason = KVM_EXIT_FAIL_ENTRY;
4051 hardware_entry_failure_reason = 0;
4057 if (vc->vcore_state == VCORE_PREEMPT && vc->runner == NULL)
4058 kvmppc_vcore_end_preempt(vc);
4060 if (vc->vcore_state != VCORE_INACTIVE) {
4061 kvmppc_wait_for_exec(vc, vcpu, TASK_INTERRUPTIBLE);
4064 for_each_runnable_thread(i, v, vc) {
4065 kvmppc_core_prepare_to_enter(v);
4066 if (signal_pending(v->arch.run_task)) {
4067 kvmppc_remove_runnable(vc, v);
4068 v->stat.signal_exits++;
4069 v->run->exit_reason = KVM_EXIT_INTR;
4070 v->arch.ret = -EINTR;
4071 wake_up(&v->arch.cpu_run);
4074 if (!vc->n_runnable || vcpu->arch.state != KVMPPC_VCPU_RUNNABLE)
4077 for_each_runnable_thread(i, v, vc) {
4078 if (!kvmppc_vcpu_woken(v))
4079 n_ceded += v->arch.ceded;
4084 if (n_ceded == vc->n_runnable) {
4085 kvmppc_vcore_blocked(vc);
4086 } else if (need_resched()) {
4087 kvmppc_vcore_preempt(vc);
4088 /* Let something else run */
4089 cond_resched_lock(&vc->lock);
4090 if (vc->vcore_state == VCORE_PREEMPT)
4091 kvmppc_vcore_end_preempt(vc);
4093 kvmppc_run_core(vc);
4098 while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE &&
4099 (vc->vcore_state == VCORE_RUNNING ||
4100 vc->vcore_state == VCORE_EXITING ||
4101 vc->vcore_state == VCORE_PIGGYBACK))
4102 kvmppc_wait_for_exec(vc, vcpu, TASK_UNINTERRUPTIBLE);
4104 if (vc->vcore_state == VCORE_PREEMPT && vc->runner == NULL)
4105 kvmppc_vcore_end_preempt(vc);
4107 if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) {
4108 kvmppc_remove_runnable(vc, vcpu);
4109 vcpu->stat.signal_exits++;
4110 run->exit_reason = KVM_EXIT_INTR;
4111 vcpu->arch.ret = -EINTR;
4114 if (vc->n_runnable && vc->vcore_state == VCORE_INACTIVE) {
4115 /* Wake up some vcpu to run the core */
4117 v = next_runnable_thread(vc, &i);
4118 wake_up(&v->arch.cpu_run);
4121 trace_kvmppc_run_vcpu_exit(vcpu);
4122 spin_unlock(&vc->lock);
4123 return vcpu->arch.ret;
4126 int kvmhv_run_single_vcpu(struct kvm_vcpu *vcpu, u64 time_limit,
4129 struct kvm_run *run = vcpu->run;
4132 struct kvmppc_vcore *vc;
4133 struct kvm *kvm = vcpu->kvm;
4134 struct kvm_nested_guest *nested = vcpu->arch.nested;
4136 trace_kvmppc_run_vcpu_enter(vcpu);
4138 run->exit_reason = 0;
4139 vcpu->arch.ret = RESUME_GUEST;
4140 vcpu->arch.trap = 0;
4142 vc = vcpu->arch.vcore;
4143 vcpu->arch.ceded = 0;
4144 vcpu->arch.run_task = current;
4145 vcpu->arch.stolen_logged = vcore_stolen_time(vc, mftb());
4146 vcpu->arch.state = KVMPPC_VCPU_RUNNABLE;
4147 vcpu->arch.busy_preempt = TB_NIL;
4148 vcpu->arch.last_inst = KVM_INST_FETCH_FAILED;
4149 vc->runnable_threads[0] = vcpu;
4153 /* See if the MMU is ready to go */
4154 if (!kvm->arch.mmu_ready)
4155 kvmhv_setup_mmu(vcpu);
4160 kvmppc_update_vpas(vcpu);
4162 init_vcore_to_run(vc);
4163 vc->preempt_tb = TB_NIL;
4166 pcpu = smp_processor_id();
4168 kvmppc_prepare_radix_vcpu(vcpu, pcpu);
4170 local_irq_disable();
4172 if (signal_pending(current))
4174 if (lazy_irq_pending() || need_resched() || !kvm->arch.mmu_ready)
4178 kvmppc_core_prepare_to_enter(vcpu);
4179 if (vcpu->arch.doorbell_request) {
4182 vcpu->arch.doorbell_request = 0;
4184 if (test_bit(BOOK3S_IRQPRIO_EXTERNAL,
4185 &vcpu->arch.pending_exceptions))
4187 } else if (vcpu->arch.pending_exceptions ||
4188 vcpu->arch.doorbell_request ||
4189 xive_interrupt_pending(vcpu)) {
4190 vcpu->arch.ret = RESUME_HOST;
4194 kvmppc_clear_host_core(pcpu);
4196 local_paca->kvm_hstate.napping = 0;
4197 local_paca->kvm_hstate.kvm_split_mode = NULL;
4198 kvmppc_start_thread(vcpu, vc);
4199 kvmppc_create_dtl_entry(vcpu, vc);
4200 trace_kvm_guest_enter(vcpu);
4202 vc->vcore_state = VCORE_RUNNING;
4203 trace_kvmppc_run_core(vc, 0);
4205 if (cpu_has_feature(CPU_FTR_HVMODE)) {
4206 lpid = nested ? nested->shadow_lpid : kvm->arch.lpid;
4207 mtspr(SPRN_LPID, lpid);
4209 kvmppc_check_need_tlb_flush(kvm, pcpu, nested);
4212 guest_enter_irqoff();
4214 srcu_idx = srcu_read_lock(&kvm->srcu);
4216 this_cpu_disable_ftrace();
4218 /* Tell lockdep that we're about to enable interrupts */
4219 trace_hardirqs_on();
4221 trap = kvmhv_p9_guest_entry(vcpu, time_limit, lpcr);
4222 vcpu->arch.trap = trap;
4224 trace_hardirqs_off();
4226 this_cpu_enable_ftrace();
4228 srcu_read_unlock(&kvm->srcu, srcu_idx);
4230 if (cpu_has_feature(CPU_FTR_HVMODE)) {
4231 mtspr(SPRN_LPID, kvm->arch.host_lpid);
4235 set_irq_happened(trap);
4237 kvmppc_set_host_core(pcpu);
4242 cpumask_clear_cpu(pcpu, &kvm->arch.cpu_in_guest);
4247 * cancel pending decrementer exception if DEC is now positive, or if
4248 * entering a nested guest in which case the decrementer is now owned
4249 * by L2 and the L1 decrementer is provided in hdec_expires
4251 if (kvmppc_core_pending_dec(vcpu) &&
4252 ((get_tb() < vcpu->arch.dec_expires) ||
4253 (trap == BOOK3S_INTERRUPT_SYSCALL &&
4254 kvmppc_get_gpr(vcpu, 3) == H_ENTER_NESTED)))
4255 kvmppc_core_dequeue_dec(vcpu);
4257 trace_kvm_guest_exit(vcpu);
4261 r = kvmppc_handle_exit_hv(vcpu, current);
4263 r = kvmppc_handle_nested_exit(vcpu);
4267 if (is_kvmppc_resume_guest(r) && vcpu->arch.ceded &&
4268 !kvmppc_vcpu_woken(vcpu)) {
4269 kvmppc_set_timer(vcpu);
4270 while (vcpu->arch.ceded && !kvmppc_vcpu_woken(vcpu)) {
4271 if (signal_pending(current)) {
4272 vcpu->stat.signal_exits++;
4273 run->exit_reason = KVM_EXIT_INTR;
4274 vcpu->arch.ret = -EINTR;
4277 spin_lock(&vc->lock);
4278 kvmppc_vcore_blocked(vc);
4279 spin_unlock(&vc->lock);
4282 vcpu->arch.ceded = 0;
4284 vc->vcore_state = VCORE_INACTIVE;
4285 trace_kvmppc_run_core(vc, 1);
4288 kvmppc_remove_runnable(vc, vcpu);
4289 trace_kvmppc_run_vcpu_exit(vcpu);
4291 return vcpu->arch.ret;
4294 vcpu->stat.signal_exits++;
4295 run->exit_reason = KVM_EXIT_INTR;
4296 vcpu->arch.ret = -EINTR;
4303 static int kvmppc_vcpu_run_hv(struct kvm_vcpu *vcpu)
4305 struct kvm_run *run = vcpu->run;
4308 unsigned long ebb_regs[3] = {}; /* shut up GCC */
4309 unsigned long user_tar = 0;
4310 unsigned int user_vrsave;
4313 if (!vcpu->arch.sane) {
4314 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
4319 * Don't allow entry with a suspended transaction, because
4320 * the guest entry/exit code will lose it.
4321 * If the guest has TM enabled, save away their TM-related SPRs
4322 * (they will get restored by the TM unavailable interrupt).
4324 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
4325 if (cpu_has_feature(CPU_FTR_TM) && current->thread.regs &&
4326 (current->thread.regs->msr & MSR_TM)) {
4327 if (MSR_TM_ACTIVE(current->thread.regs->msr)) {
4328 run->exit_reason = KVM_EXIT_FAIL_ENTRY;
4329 run->fail_entry.hardware_entry_failure_reason = 0;
4332 /* Enable TM so we can read the TM SPRs */
4333 mtmsr(mfmsr() | MSR_TM);
4334 current->thread.tm_tfhar = mfspr(SPRN_TFHAR);
4335 current->thread.tm_tfiar = mfspr(SPRN_TFIAR);
4336 current->thread.tm_texasr = mfspr(SPRN_TEXASR);
4337 current->thread.regs->msr &= ~MSR_TM;
4342 * Force online to 1 for the sake of old userspace which doesn't
4345 if (!vcpu->arch.online) {
4346 atomic_inc(&vcpu->arch.vcore->online_count);
4347 vcpu->arch.online = 1;
4350 kvmppc_core_prepare_to_enter(vcpu);
4352 /* No need to go into the guest when all we'll do is come back out */
4353 if (signal_pending(current)) {
4354 run->exit_reason = KVM_EXIT_INTR;
4359 atomic_inc(&kvm->arch.vcpus_running);
4360 /* Order vcpus_running vs. mmu_ready, see kvmppc_alloc_reset_hpt */
4363 flush_all_to_thread(current);
4365 /* Save userspace EBB and other register values */
4366 if (cpu_has_feature(CPU_FTR_ARCH_207S)) {
4367 ebb_regs[0] = mfspr(SPRN_EBBHR);
4368 ebb_regs[1] = mfspr(SPRN_EBBRR);
4369 ebb_regs[2] = mfspr(SPRN_BESCR);
4370 user_tar = mfspr(SPRN_TAR);
4372 user_vrsave = mfspr(SPRN_VRSAVE);
4374 vcpu->arch.waitp = &vcpu->arch.vcore->wait;
4375 vcpu->arch.pgdir = kvm->mm->pgd;
4376 vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST;
4380 * The TLB prefetch bug fixup is only in the kvmppc_run_vcpu
4381 * path, which also handles hash and dependent threads mode.
4383 if (kvm->arch.threads_indep && kvm_is_radix(kvm) &&
4384 !cpu_has_feature(CPU_FTR_P9_RADIX_PREFETCH_BUG))
4385 r = kvmhv_run_single_vcpu(vcpu, ~(u64)0,
4386 vcpu->arch.vcore->lpcr);
4388 r = kvmppc_run_vcpu(vcpu);
4390 if (run->exit_reason == KVM_EXIT_PAPR_HCALL &&
4391 !(vcpu->arch.shregs.msr & MSR_PR)) {
4392 trace_kvm_hcall_enter(vcpu);
4393 r = kvmppc_pseries_do_hcall(vcpu);
4394 trace_kvm_hcall_exit(vcpu, r);
4395 kvmppc_core_prepare_to_enter(vcpu);
4396 } else if (r == RESUME_PAGE_FAULT) {
4397 srcu_idx = srcu_read_lock(&kvm->srcu);
4398 r = kvmppc_book3s_hv_page_fault(vcpu,
4399 vcpu->arch.fault_dar, vcpu->arch.fault_dsisr);
4400 srcu_read_unlock(&kvm->srcu, srcu_idx);
4401 } else if (r == RESUME_PASSTHROUGH) {
4402 if (WARN_ON(xics_on_xive()))
4405 r = kvmppc_xics_rm_complete(vcpu, 0);
4407 } while (is_kvmppc_resume_guest(r));
4409 /* Restore userspace EBB and other register values */
4410 if (cpu_has_feature(CPU_FTR_ARCH_207S)) {
4411 mtspr(SPRN_EBBHR, ebb_regs[0]);
4412 mtspr(SPRN_EBBRR, ebb_regs[1]);
4413 mtspr(SPRN_BESCR, ebb_regs[2]);
4414 mtspr(SPRN_TAR, user_tar);
4415 mtspr(SPRN_FSCR, current->thread.fscr);
4417 mtspr(SPRN_VRSAVE, user_vrsave);
4419 vcpu->arch.state = KVMPPC_VCPU_NOTREADY;
4420 atomic_dec(&kvm->arch.vcpus_running);
4424 static void kvmppc_add_seg_page_size(struct kvm_ppc_one_seg_page_size **sps,
4425 int shift, int sllp)
4427 (*sps)->page_shift = shift;
4428 (*sps)->slb_enc = sllp;
4429 (*sps)->enc[0].page_shift = shift;
4430 (*sps)->enc[0].pte_enc = kvmppc_pgsize_lp_encoding(shift, shift);
4432 * Add 16MB MPSS support (may get filtered out by userspace)
4435 int penc = kvmppc_pgsize_lp_encoding(shift, 24);
4437 (*sps)->enc[1].page_shift = 24;
4438 (*sps)->enc[1].pte_enc = penc;
4444 static int kvm_vm_ioctl_get_smmu_info_hv(struct kvm *kvm,
4445 struct kvm_ppc_smmu_info *info)
4447 struct kvm_ppc_one_seg_page_size *sps;
4450 * POWER7, POWER8 and POWER9 all support 32 storage keys for data.
4451 * POWER7 doesn't support keys for instruction accesses,
4452 * POWER8 and POWER9 do.
4454 info->data_keys = 32;
4455 info->instr_keys = cpu_has_feature(CPU_FTR_ARCH_207S) ? 32 : 0;
4457 /* POWER7, 8 and 9 all have 1T segments and 32-entry SLB */
4458 info->flags = KVM_PPC_PAGE_SIZES_REAL | KVM_PPC_1T_SEGMENTS;
4459 info->slb_size = 32;
4461 /* We only support these sizes for now, and no muti-size segments */
4462 sps = &info->sps[0];
4463 kvmppc_add_seg_page_size(&sps, 12, 0);
4464 kvmppc_add_seg_page_size(&sps, 16, SLB_VSID_L | SLB_VSID_LP_01);
4465 kvmppc_add_seg_page_size(&sps, 24, SLB_VSID_L);
4467 /* If running as a nested hypervisor, we don't support HPT guests */
4468 if (kvmhv_on_pseries())
4469 info->flags |= KVM_PPC_NO_HASH;
4475 * Get (and clear) the dirty memory log for a memory slot.
4477 static int kvm_vm_ioctl_get_dirty_log_hv(struct kvm *kvm,
4478 struct kvm_dirty_log *log)
4480 struct kvm_memslots *slots;
4481 struct kvm_memory_slot *memslot;
4484 unsigned long *buf, *p;
4485 struct kvm_vcpu *vcpu;
4487 mutex_lock(&kvm->slots_lock);
4490 if (log->slot >= KVM_USER_MEM_SLOTS)
4493 slots = kvm_memslots(kvm);
4494 memslot = id_to_memslot(slots, log->slot);
4496 if (!memslot || !memslot->dirty_bitmap)
4500 * Use second half of bitmap area because both HPT and radix
4501 * accumulate bits in the first half.
4503 n = kvm_dirty_bitmap_bytes(memslot);
4504 buf = memslot->dirty_bitmap + n / sizeof(long);
4507 if (kvm_is_radix(kvm))
4508 r = kvmppc_hv_get_dirty_log_radix(kvm, memslot, buf);
4510 r = kvmppc_hv_get_dirty_log_hpt(kvm, memslot, buf);
4515 * We accumulate dirty bits in the first half of the
4516 * memslot's dirty_bitmap area, for when pages are paged
4517 * out or modified by the host directly. Pick up these
4518 * bits and add them to the map.
4520 p = memslot->dirty_bitmap;
4521 for (i = 0; i < n / sizeof(long); ++i)
4522 buf[i] |= xchg(&p[i], 0);
4524 /* Harvest dirty bits from VPA and DTL updates */
4525 /* Note: we never modify the SLB shadow buffer areas */
4526 kvm_for_each_vcpu(i, vcpu, kvm) {
4527 spin_lock(&vcpu->arch.vpa_update_lock);
4528 kvmppc_harvest_vpa_dirty(&vcpu->arch.vpa, memslot, buf);
4529 kvmppc_harvest_vpa_dirty(&vcpu->arch.dtl, memslot, buf);
4530 spin_unlock(&vcpu->arch.vpa_update_lock);
4534 if (copy_to_user(log->dirty_bitmap, buf, n))
4539 mutex_unlock(&kvm->slots_lock);
4543 static void kvmppc_core_free_memslot_hv(struct kvm_memory_slot *slot)
4545 vfree(slot->arch.rmap);
4546 slot->arch.rmap = NULL;
4549 static int kvmppc_core_prepare_memory_region_hv(struct kvm *kvm,
4550 struct kvm_memory_slot *slot,
4551 const struct kvm_userspace_memory_region *mem,
4552 enum kvm_mr_change change)
4554 unsigned long npages = mem->memory_size >> PAGE_SHIFT;
4556 if (change == KVM_MR_CREATE) {
4557 slot->arch.rmap = vzalloc(array_size(npages,
4558 sizeof(*slot->arch.rmap)));
4559 if (!slot->arch.rmap)
4566 static void kvmppc_core_commit_memory_region_hv(struct kvm *kvm,
4567 const struct kvm_userspace_memory_region *mem,
4568 const struct kvm_memory_slot *old,
4569 const struct kvm_memory_slot *new,
4570 enum kvm_mr_change change)
4572 unsigned long npages = mem->memory_size >> PAGE_SHIFT;
4575 * If we are making a new memslot, it might make
4576 * some address that was previously cached as emulated
4577 * MMIO be no longer emulated MMIO, so invalidate
4578 * all the caches of emulated MMIO translations.
4581 atomic64_inc(&kvm->arch.mmio_update);
4584 * For change == KVM_MR_MOVE or KVM_MR_DELETE, higher levels
4585 * have already called kvm_arch_flush_shadow_memslot() to
4586 * flush shadow mappings. For KVM_MR_CREATE we have no
4587 * previous mappings. So the only case to handle is
4588 * KVM_MR_FLAGS_ONLY when the KVM_MEM_LOG_DIRTY_PAGES bit
4590 * For radix guests, we flush on setting KVM_MEM_LOG_DIRTY_PAGES
4591 * to get rid of any THP PTEs in the partition-scoped page tables
4592 * so we can track dirtiness at the page level; we flush when
4593 * clearing KVM_MEM_LOG_DIRTY_PAGES so that we can go back to
4596 if (change == KVM_MR_FLAGS_ONLY && kvm_is_radix(kvm) &&
4597 ((new->flags ^ old->flags) & KVM_MEM_LOG_DIRTY_PAGES))
4598 kvmppc_radix_flush_memslot(kvm, old);
4600 * If UV hasn't yet called H_SVM_INIT_START, don't register memslots.
4602 if (!kvm->arch.secure_guest)
4608 * @TODO kvmppc_uvmem_memslot_create() can fail and
4609 * return error. Fix this.
4611 kvmppc_uvmem_memslot_create(kvm, new);
4614 kvmppc_uvmem_memslot_delete(kvm, old);
4617 /* TODO: Handle KVM_MR_MOVE */
4623 * Update LPCR values in kvm->arch and in vcores.
4624 * Caller must hold kvm->arch.mmu_setup_lock (for mutual exclusion
4625 * of kvm->arch.lpcr update).
4627 void kvmppc_update_lpcr(struct kvm *kvm, unsigned long lpcr, unsigned long mask)
4632 if ((kvm->arch.lpcr & mask) == lpcr)
4635 kvm->arch.lpcr = (kvm->arch.lpcr & ~mask) | lpcr;
4637 for (i = 0; i < KVM_MAX_VCORES; ++i) {
4638 struct kvmppc_vcore *vc = kvm->arch.vcores[i];
4641 spin_lock(&vc->lock);
4642 vc->lpcr = (vc->lpcr & ~mask) | lpcr;
4643 spin_unlock(&vc->lock);
4644 if (++cores_done >= kvm->arch.online_vcores)
4649 void kvmppc_setup_partition_table(struct kvm *kvm)
4651 unsigned long dw0, dw1;
4653 if (!kvm_is_radix(kvm)) {
4654 /* PS field - page size for VRMA */
4655 dw0 = ((kvm->arch.vrma_slb_v & SLB_VSID_L) >> 1) |
4656 ((kvm->arch.vrma_slb_v & SLB_VSID_LP) << 1);
4657 /* HTABSIZE and HTABORG fields */
4658 dw0 |= kvm->arch.sdr1;
4660 /* Second dword as set by userspace */
4661 dw1 = kvm->arch.process_table;
4663 dw0 = PATB_HR | radix__get_tree_size() |
4664 __pa(kvm->arch.pgtable) | RADIX_PGD_INDEX_SIZE;
4665 dw1 = PATB_GR | kvm->arch.process_table;
4667 kvmhv_set_ptbl_entry(kvm->arch.lpid, dw0, dw1);
4671 * Set up HPT (hashed page table) and RMA (real-mode area).
4672 * Must be called with kvm->arch.mmu_setup_lock held.
4674 static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu)
4677 struct kvm *kvm = vcpu->kvm;
4679 struct kvm_memory_slot *memslot;
4680 struct vm_area_struct *vma;
4681 unsigned long lpcr = 0, senc;
4682 unsigned long psize, porder;
4685 /* Allocate hashed page table (if not done already) and reset it */
4686 if (!kvm->arch.hpt.virt) {
4687 int order = KVM_DEFAULT_HPT_ORDER;
4688 struct kvm_hpt_info info;
4690 err = kvmppc_allocate_hpt(&info, order);
4691 /* If we get here, it means userspace didn't specify a
4692 * size explicitly. So, try successively smaller
4693 * sizes if the default failed. */
4694 while ((err == -ENOMEM) && --order >= PPC_MIN_HPT_ORDER)
4695 err = kvmppc_allocate_hpt(&info, order);
4698 pr_err("KVM: Couldn't alloc HPT\n");
4702 kvmppc_set_hpt(kvm, &info);
4705 /* Look up the memslot for guest physical address 0 */
4706 srcu_idx = srcu_read_lock(&kvm->srcu);
4707 memslot = gfn_to_memslot(kvm, 0);
4709 /* We must have some memory at 0 by now */
4711 if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID))
4714 /* Look up the VMA for the start of this memory slot */
4715 hva = memslot->userspace_addr;
4716 mmap_read_lock(kvm->mm);
4717 vma = find_vma(kvm->mm, hva);
4718 if (!vma || vma->vm_start > hva || (vma->vm_flags & VM_IO))
4721 psize = vma_kernel_pagesize(vma);
4723 mmap_read_unlock(kvm->mm);
4725 /* We can handle 4k, 64k or 16M pages in the VRMA */
4726 if (psize >= 0x1000000)
4728 else if (psize >= 0x10000)
4732 porder = __ilog2(psize);
4734 senc = slb_pgsize_encoding(psize);
4735 kvm->arch.vrma_slb_v = senc | SLB_VSID_B_1T |
4736 (VRMA_VSID << SLB_VSID_SHIFT_1T);
4737 /* Create HPTEs in the hash page table for the VRMA */
4738 kvmppc_map_vrma(vcpu, memslot, porder);
4740 /* Update VRMASD field in the LPCR */
4741 if (!cpu_has_feature(CPU_FTR_ARCH_300)) {
4742 /* the -4 is to account for senc values starting at 0x10 */
4743 lpcr = senc << (LPCR_VRMASD_SH - 4);
4744 kvmppc_update_lpcr(kvm, lpcr, LPCR_VRMASD);
4747 /* Order updates to kvm->arch.lpcr etc. vs. mmu_ready */
4751 srcu_read_unlock(&kvm->srcu, srcu_idx);
4756 mmap_read_unlock(kvm->mm);
4761 * Must be called with kvm->arch.mmu_setup_lock held and
4762 * mmu_ready = 0 and no vcpus running.
4764 int kvmppc_switch_mmu_to_hpt(struct kvm *kvm)
4766 if (nesting_enabled(kvm))
4767 kvmhv_release_all_nested(kvm);
4768 kvmppc_rmap_reset(kvm);
4769 kvm->arch.process_table = 0;
4770 /* Mutual exclusion with kvm_unmap_hva_range etc. */
4771 spin_lock(&kvm->mmu_lock);
4772 kvm->arch.radix = 0;
4773 spin_unlock(&kvm->mmu_lock);
4774 kvmppc_free_radix(kvm);
4775 kvmppc_update_lpcr(kvm, LPCR_VPM1,
4776 LPCR_VPM1 | LPCR_UPRT | LPCR_GTSE | LPCR_HR);
4781 * Must be called with kvm->arch.mmu_setup_lock held and
4782 * mmu_ready = 0 and no vcpus running.
4784 int kvmppc_switch_mmu_to_radix(struct kvm *kvm)
4788 err = kvmppc_init_vm_radix(kvm);
4791 kvmppc_rmap_reset(kvm);
4792 /* Mutual exclusion with kvm_unmap_hva_range etc. */
4793 spin_lock(&kvm->mmu_lock);
4794 kvm->arch.radix = 1;
4795 spin_unlock(&kvm->mmu_lock);
4796 kvmppc_free_hpt(&kvm->arch.hpt);
4797 kvmppc_update_lpcr(kvm, LPCR_UPRT | LPCR_GTSE | LPCR_HR,
4798 LPCR_VPM1 | LPCR_UPRT | LPCR_GTSE | LPCR_HR);
4802 #ifdef CONFIG_KVM_XICS
4804 * Allocate a per-core structure for managing state about which cores are
4805 * running in the host versus the guest and for exchanging data between
4806 * real mode KVM and CPU running in the host.
4807 * This is only done for the first VM.
4808 * The allocated structure stays even if all VMs have stopped.
4809 * It is only freed when the kvm-hv module is unloaded.
4810 * It's OK for this routine to fail, we just don't support host
4811 * core operations like redirecting H_IPI wakeups.
4813 void kvmppc_alloc_host_rm_ops(void)
4815 struct kvmppc_host_rm_ops *ops;
4816 unsigned long l_ops;
4820 /* Not the first time here ? */
4821 if (kvmppc_host_rm_ops_hv != NULL)
4824 ops = kzalloc(sizeof(struct kvmppc_host_rm_ops), GFP_KERNEL);
4828 size = cpu_nr_cores() * sizeof(struct kvmppc_host_rm_core);
4829 ops->rm_core = kzalloc(size, GFP_KERNEL);
4831 if (!ops->rm_core) {
4838 for (cpu = 0; cpu < nr_cpu_ids; cpu += threads_per_core) {
4839 if (!cpu_online(cpu))
4842 core = cpu >> threads_shift;
4843 ops->rm_core[core].rm_state.in_host = 1;
4846 ops->vcpu_kick = kvmppc_fast_vcpu_kick_hv;
4849 * Make the contents of the kvmppc_host_rm_ops structure visible
4850 * to other CPUs before we assign it to the global variable.
4851 * Do an atomic assignment (no locks used here), but if someone
4852 * beats us to it, just free our copy and return.
4855 l_ops = (unsigned long) ops;
4857 if (cmpxchg64((unsigned long *)&kvmppc_host_rm_ops_hv, 0, l_ops)) {
4859 kfree(ops->rm_core);
4864 cpuhp_setup_state_nocalls_cpuslocked(CPUHP_KVM_PPC_BOOK3S_PREPARE,
4865 "ppc/kvm_book3s:prepare",
4866 kvmppc_set_host_core,
4867 kvmppc_clear_host_core);
4871 void kvmppc_free_host_rm_ops(void)
4873 if (kvmppc_host_rm_ops_hv) {
4874 cpuhp_remove_state_nocalls(CPUHP_KVM_PPC_BOOK3S_PREPARE);
4875 kfree(kvmppc_host_rm_ops_hv->rm_core);
4876 kfree(kvmppc_host_rm_ops_hv);
4877 kvmppc_host_rm_ops_hv = NULL;
4882 static int kvmppc_core_init_vm_hv(struct kvm *kvm)
4884 unsigned long lpcr, lpid;
4888 mutex_init(&kvm->arch.uvmem_lock);
4889 INIT_LIST_HEAD(&kvm->arch.uvmem_pfns);
4890 mutex_init(&kvm->arch.mmu_setup_lock);
4892 /* Allocate the guest's logical partition ID */
4894 lpid = kvmppc_alloc_lpid();
4897 kvm->arch.lpid = lpid;
4899 kvmppc_alloc_host_rm_ops();
4901 kvmhv_vm_nested_init(kvm);
4904 * Since we don't flush the TLB when tearing down a VM,
4905 * and this lpid might have previously been used,
4906 * make sure we flush on each core before running the new VM.
4907 * On POWER9, the tlbie in mmu_partition_table_set_entry()
4908 * does this flush for us.
4910 if (!cpu_has_feature(CPU_FTR_ARCH_300))
4911 cpumask_setall(&kvm->arch.need_tlb_flush);
4913 /* Start out with the default set of hcalls enabled */
4914 memcpy(kvm->arch.enabled_hcalls, default_enabled_hcalls,
4915 sizeof(kvm->arch.enabled_hcalls));
4917 if (!cpu_has_feature(CPU_FTR_ARCH_300))
4918 kvm->arch.host_sdr1 = mfspr(SPRN_SDR1);
4920 /* Init LPCR for virtual RMA mode */
4921 if (cpu_has_feature(CPU_FTR_HVMODE)) {
4922 kvm->arch.host_lpid = mfspr(SPRN_LPID);
4923 kvm->arch.host_lpcr = lpcr = mfspr(SPRN_LPCR);
4924 lpcr &= LPCR_PECE | LPCR_LPES;
4928 lpcr |= (4UL << LPCR_DPFD_SH) | LPCR_HDICE |
4929 LPCR_VPM0 | LPCR_VPM1;
4930 kvm->arch.vrma_slb_v = SLB_VSID_B_1T |
4931 (VRMA_VSID << SLB_VSID_SHIFT_1T);
4932 /* On POWER8 turn on online bit to enable PURR/SPURR */
4933 if (cpu_has_feature(CPU_FTR_ARCH_207S))
4936 * On POWER9, VPM0 bit is reserved (VPM0=1 behaviour is assumed)
4937 * Set HVICE bit to enable hypervisor virtualization interrupts.
4938 * Set HEIC to prevent OS interrupts to go to hypervisor (should
4939 * be unnecessary but better safe than sorry in case we re-enable
4940 * EE in HV mode with this LPCR still set)
4942 if (cpu_has_feature(CPU_FTR_ARCH_300)) {
4944 lpcr |= LPCR_HVICE | LPCR_HEIC;
4947 * If xive is enabled, we route 0x500 interrupts directly
4955 * If the host uses radix, the guest starts out as radix.
4957 if (radix_enabled()) {
4958 kvm->arch.radix = 1;
4959 kvm->arch.mmu_ready = 1;
4961 lpcr |= LPCR_UPRT | LPCR_GTSE | LPCR_HR;
4962 ret = kvmppc_init_vm_radix(kvm);
4964 kvmppc_free_lpid(kvm->arch.lpid);
4967 kvmppc_setup_partition_table(kvm);
4970 kvm->arch.lpcr = lpcr;
4972 /* Initialization for future HPT resizes */
4973 kvm->arch.resize_hpt = NULL;
4976 * Work out how many sets the TLB has, for the use of
4977 * the TLB invalidation loop in book3s_hv_rmhandlers.S.
4979 if (cpu_has_feature(CPU_FTR_ARCH_31)) {
4981 * P10 will flush all the congruence class with a single tlbiel
4983 kvm->arch.tlb_sets = 1;
4984 } else if (radix_enabled())
4985 kvm->arch.tlb_sets = POWER9_TLB_SETS_RADIX; /* 128 */
4986 else if (cpu_has_feature(CPU_FTR_ARCH_300))
4987 kvm->arch.tlb_sets = POWER9_TLB_SETS_HASH; /* 256 */
4988 else if (cpu_has_feature(CPU_FTR_ARCH_207S))
4989 kvm->arch.tlb_sets = POWER8_TLB_SETS; /* 512 */
4991 kvm->arch.tlb_sets = POWER7_TLB_SETS; /* 128 */
4994 * Track that we now have a HV mode VM active. This blocks secondary
4995 * CPU threads from coming online.
4996 * On POWER9, we only need to do this if the "indep_threads_mode"
4997 * module parameter has been set to N.
4999 if (cpu_has_feature(CPU_FTR_ARCH_300)) {
5000 if (!indep_threads_mode && !cpu_has_feature(CPU_FTR_HVMODE)) {
5001 pr_warn("KVM: Ignoring indep_threads_mode=N in nested hypervisor\n");
5002 kvm->arch.threads_indep = true;
5004 kvm->arch.threads_indep = indep_threads_mode;
5007 if (!kvm->arch.threads_indep)
5008 kvm_hv_vm_activated();
5011 * Initialize smt_mode depending on processor.
5012 * POWER8 and earlier have to use "strict" threading, where
5013 * all vCPUs in a vcore have to run on the same (sub)core,
5014 * whereas on POWER9 the threads can each run a different
5017 if (!cpu_has_feature(CPU_FTR_ARCH_300))
5018 kvm->arch.smt_mode = threads_per_subcore;
5020 kvm->arch.smt_mode = 1;
5021 kvm->arch.emul_smt_mode = 1;
5024 * Create a debugfs directory for the VM
5026 snprintf(buf, sizeof(buf), "vm%d", current->pid);
5027 kvm->arch.debugfs_dir = debugfs_create_dir(buf, kvm_debugfs_dir);
5028 kvmppc_mmu_debugfs_init(kvm);
5029 if (radix_enabled())
5030 kvmhv_radix_debugfs_init(kvm);
5035 static void kvmppc_free_vcores(struct kvm *kvm)
5039 for (i = 0; i < KVM_MAX_VCORES; ++i)
5040 kfree(kvm->arch.vcores[i]);
5041 kvm->arch.online_vcores = 0;
5044 static void kvmppc_core_destroy_vm_hv(struct kvm *kvm)
5046 debugfs_remove_recursive(kvm->arch.debugfs_dir);
5048 if (!kvm->arch.threads_indep)
5049 kvm_hv_vm_deactivated();
5051 kvmppc_free_vcores(kvm);
5054 if (kvm_is_radix(kvm))
5055 kvmppc_free_radix(kvm);
5057 kvmppc_free_hpt(&kvm->arch.hpt);
5059 /* Perform global invalidation and return lpid to the pool */
5060 if (cpu_has_feature(CPU_FTR_ARCH_300)) {
5061 if (nesting_enabled(kvm))
5062 kvmhv_release_all_nested(kvm);
5063 kvm->arch.process_table = 0;
5064 if (kvm->arch.secure_guest)
5065 uv_svm_terminate(kvm->arch.lpid);
5066 kvmhv_set_ptbl_entry(kvm->arch.lpid, 0, 0);
5069 kvmppc_free_lpid(kvm->arch.lpid);
5071 kvmppc_free_pimap(kvm);
5074 /* We don't need to emulate any privileged instructions or dcbz */
5075 static int kvmppc_core_emulate_op_hv(struct kvm_vcpu *vcpu,
5076 unsigned int inst, int *advance)
5078 return EMULATE_FAIL;
5081 static int kvmppc_core_emulate_mtspr_hv(struct kvm_vcpu *vcpu, int sprn,
5084 return EMULATE_FAIL;
5087 static int kvmppc_core_emulate_mfspr_hv(struct kvm_vcpu *vcpu, int sprn,
5090 return EMULATE_FAIL;
5093 static int kvmppc_core_check_processor_compat_hv(void)
5095 if (cpu_has_feature(CPU_FTR_HVMODE) &&
5096 cpu_has_feature(CPU_FTR_ARCH_206))
5099 /* POWER9 in radix mode is capable of being a nested hypervisor. */
5100 if (cpu_has_feature(CPU_FTR_ARCH_300) && radix_enabled())
5106 #ifdef CONFIG_KVM_XICS
5108 void kvmppc_free_pimap(struct kvm *kvm)
5110 kfree(kvm->arch.pimap);
5113 static struct kvmppc_passthru_irqmap *kvmppc_alloc_pimap(void)
5115 return kzalloc(sizeof(struct kvmppc_passthru_irqmap), GFP_KERNEL);
5118 static int kvmppc_set_passthru_irq(struct kvm *kvm, int host_irq, int guest_gsi)
5120 struct irq_desc *desc;
5121 struct kvmppc_irq_map *irq_map;
5122 struct kvmppc_passthru_irqmap *pimap;
5123 struct irq_chip *chip;
5126 if (!kvm_irq_bypass)
5129 desc = irq_to_desc(host_irq);
5133 mutex_lock(&kvm->lock);
5135 pimap = kvm->arch.pimap;
5136 if (pimap == NULL) {
5137 /* First call, allocate structure to hold IRQ map */
5138 pimap = kvmppc_alloc_pimap();
5139 if (pimap == NULL) {
5140 mutex_unlock(&kvm->lock);
5143 kvm->arch.pimap = pimap;
5147 * For now, we only support interrupts for which the EOI operation
5148 * is an OPAL call followed by a write to XIRR, since that's
5149 * what our real-mode EOI code does, or a XIVE interrupt
5151 chip = irq_data_get_irq_chip(&desc->irq_data);
5152 if (!chip || !(is_pnv_opal_msi(chip) || is_xive_irq(chip))) {
5153 pr_warn("kvmppc_set_passthru_irq_hv: Could not assign IRQ map for (%d,%d)\n",
5154 host_irq, guest_gsi);
5155 mutex_unlock(&kvm->lock);
5160 * See if we already have an entry for this guest IRQ number.
5161 * If it's mapped to a hardware IRQ number, that's an error,
5162 * otherwise re-use this entry.
5164 for (i = 0; i < pimap->n_mapped; i++) {
5165 if (guest_gsi == pimap->mapped[i].v_hwirq) {
5166 if (pimap->mapped[i].r_hwirq) {
5167 mutex_unlock(&kvm->lock);
5174 if (i == KVMPPC_PIRQ_MAPPED) {
5175 mutex_unlock(&kvm->lock);
5176 return -EAGAIN; /* table is full */
5179 irq_map = &pimap->mapped[i];
5181 irq_map->v_hwirq = guest_gsi;
5182 irq_map->desc = desc;
5185 * Order the above two stores before the next to serialize with
5186 * the KVM real mode handler.
5189 irq_map->r_hwirq = desc->irq_data.hwirq;
5191 if (i == pimap->n_mapped)
5195 rc = kvmppc_xive_set_mapped(kvm, guest_gsi, desc);
5197 kvmppc_xics_set_mapped(kvm, guest_gsi, desc->irq_data.hwirq);
5199 irq_map->r_hwirq = 0;
5201 mutex_unlock(&kvm->lock);
5206 static int kvmppc_clr_passthru_irq(struct kvm *kvm, int host_irq, int guest_gsi)
5208 struct irq_desc *desc;
5209 struct kvmppc_passthru_irqmap *pimap;
5212 if (!kvm_irq_bypass)
5215 desc = irq_to_desc(host_irq);
5219 mutex_lock(&kvm->lock);
5220 if (!kvm->arch.pimap)
5223 pimap = kvm->arch.pimap;
5225 for (i = 0; i < pimap->n_mapped; i++) {
5226 if (guest_gsi == pimap->mapped[i].v_hwirq)
5230 if (i == pimap->n_mapped) {
5231 mutex_unlock(&kvm->lock);
5236 rc = kvmppc_xive_clr_mapped(kvm, guest_gsi, pimap->mapped[i].desc);
5238 kvmppc_xics_clr_mapped(kvm, guest_gsi, pimap->mapped[i].r_hwirq);
5240 /* invalidate the entry (what do do on error from the above ?) */
5241 pimap->mapped[i].r_hwirq = 0;
5244 * We don't free this structure even when the count goes to
5245 * zero. The structure is freed when we destroy the VM.
5248 mutex_unlock(&kvm->lock);
5252 static int kvmppc_irq_bypass_add_producer_hv(struct irq_bypass_consumer *cons,
5253 struct irq_bypass_producer *prod)
5256 struct kvm_kernel_irqfd *irqfd =
5257 container_of(cons, struct kvm_kernel_irqfd, consumer);
5259 irqfd->producer = prod;
5261 ret = kvmppc_set_passthru_irq(irqfd->kvm, prod->irq, irqfd->gsi);
5263 pr_info("kvmppc_set_passthru_irq (irq %d, gsi %d) fails: %d\n",
5264 prod->irq, irqfd->gsi, ret);
5269 static void kvmppc_irq_bypass_del_producer_hv(struct irq_bypass_consumer *cons,
5270 struct irq_bypass_producer *prod)
5273 struct kvm_kernel_irqfd *irqfd =
5274 container_of(cons, struct kvm_kernel_irqfd, consumer);
5276 irqfd->producer = NULL;
5279 * When producer of consumer is unregistered, we change back to
5280 * default external interrupt handling mode - KVM real mode
5281 * will switch back to host.
5283 ret = kvmppc_clr_passthru_irq(irqfd->kvm, prod->irq, irqfd->gsi);
5285 pr_warn("kvmppc_clr_passthru_irq (irq %d, gsi %d) fails: %d\n",
5286 prod->irq, irqfd->gsi, ret);
5290 static long kvm_arch_vm_ioctl_hv(struct file *filp,
5291 unsigned int ioctl, unsigned long arg)
5293 struct kvm *kvm __maybe_unused = filp->private_data;
5294 void __user *argp = (void __user *)arg;
5299 case KVM_PPC_ALLOCATE_HTAB: {
5302 /* If we're a nested hypervisor, we currently only support radix */
5303 if (kvmhv_on_pseries()) {
5309 if (get_user(htab_order, (u32 __user *)argp))
5311 r = kvmppc_alloc_reset_hpt(kvm, htab_order);
5318 case KVM_PPC_GET_HTAB_FD: {
5319 struct kvm_get_htab_fd ghf;
5322 if (copy_from_user(&ghf, argp, sizeof(ghf)))
5324 r = kvm_vm_ioctl_get_htab_fd(kvm, &ghf);
5328 case KVM_PPC_RESIZE_HPT_PREPARE: {
5329 struct kvm_ppc_resize_hpt rhpt;
5332 if (copy_from_user(&rhpt, argp, sizeof(rhpt)))
5335 r = kvm_vm_ioctl_resize_hpt_prepare(kvm, &rhpt);
5339 case KVM_PPC_RESIZE_HPT_COMMIT: {
5340 struct kvm_ppc_resize_hpt rhpt;
5343 if (copy_from_user(&rhpt, argp, sizeof(rhpt)))
5346 r = kvm_vm_ioctl_resize_hpt_commit(kvm, &rhpt);
5358 * List of hcall numbers to enable by default.
5359 * For compatibility with old userspace, we enable by default
5360 * all hcalls that were implemented before the hcall-enabling
5361 * facility was added. Note this list should not include H_RTAS.
5363 static unsigned int default_hcall_list[] = {
5377 #ifdef CONFIG_KVM_XICS
5388 static void init_default_hcalls(void)
5393 for (i = 0; default_hcall_list[i]; ++i) {
5394 hcall = default_hcall_list[i];
5395 WARN_ON(!kvmppc_hcall_impl_hv(hcall));
5396 __set_bit(hcall / 4, default_enabled_hcalls);
5400 static int kvmhv_configure_mmu(struct kvm *kvm, struct kvm_ppc_mmuv3_cfg *cfg)
5406 /* If not on a POWER9, reject it */
5407 if (!cpu_has_feature(CPU_FTR_ARCH_300))
5410 /* If any unknown flags set, reject it */
5411 if (cfg->flags & ~(KVM_PPC_MMUV3_RADIX | KVM_PPC_MMUV3_GTSE))
5414 /* GR (guest radix) bit in process_table field must match */
5415 radix = !!(cfg->flags & KVM_PPC_MMUV3_RADIX);
5416 if (!!(cfg->process_table & PATB_GR) != radix)
5419 /* Process table size field must be reasonable, i.e. <= 24 */
5420 if ((cfg->process_table & PRTS_MASK) > 24)
5423 /* We can change a guest to/from radix now, if the host is radix */
5424 if (radix && !radix_enabled())
5427 /* If we're a nested hypervisor, we currently only support radix */
5428 if (kvmhv_on_pseries() && !radix)
5431 mutex_lock(&kvm->arch.mmu_setup_lock);
5432 if (radix != kvm_is_radix(kvm)) {
5433 if (kvm->arch.mmu_ready) {
5434 kvm->arch.mmu_ready = 0;
5435 /* order mmu_ready vs. vcpus_running */
5437 if (atomic_read(&kvm->arch.vcpus_running)) {
5438 kvm->arch.mmu_ready = 1;
5444 err = kvmppc_switch_mmu_to_radix(kvm);
5446 err = kvmppc_switch_mmu_to_hpt(kvm);
5451 kvm->arch.process_table = cfg->process_table;
5452 kvmppc_setup_partition_table(kvm);
5454 lpcr = (cfg->flags & KVM_PPC_MMUV3_GTSE) ? LPCR_GTSE : 0;
5455 kvmppc_update_lpcr(kvm, lpcr, LPCR_GTSE);
5459 mutex_unlock(&kvm->arch.mmu_setup_lock);
5463 static int kvmhv_enable_nested(struct kvm *kvm)
5467 if (!cpu_has_feature(CPU_FTR_ARCH_300) || no_mixing_hpt_and_radix)
5470 /* kvm == NULL means the caller is testing if the capability exists */
5472 kvm->arch.nested_enable = true;
5476 static int kvmhv_load_from_eaddr(struct kvm_vcpu *vcpu, ulong *eaddr, void *ptr,
5481 if (kvmhv_vcpu_is_radix(vcpu)) {
5482 rc = kvmhv_copy_from_guest_radix(vcpu, *eaddr, ptr, size);
5488 /* For now quadrants are the only way to access nested guest memory */
5489 if (rc && vcpu->arch.nested)
5495 static int kvmhv_store_to_eaddr(struct kvm_vcpu *vcpu, ulong *eaddr, void *ptr,
5500 if (kvmhv_vcpu_is_radix(vcpu)) {
5501 rc = kvmhv_copy_to_guest_radix(vcpu, *eaddr, ptr, size);
5507 /* For now quadrants are the only way to access nested guest memory */
5508 if (rc && vcpu->arch.nested)
5514 static void unpin_vpa_reset(struct kvm *kvm, struct kvmppc_vpa *vpa)
5516 unpin_vpa(kvm, vpa);
5518 vpa->pinned_addr = NULL;
5520 vpa->update_pending = 0;
5524 * Enable a guest to become a secure VM, or test whether
5525 * that could be enabled.
5526 * Called when the KVM_CAP_PPC_SECURE_GUEST capability is
5527 * tested (kvm == NULL) or enabled (kvm != NULL).
5529 static int kvmhv_enable_svm(struct kvm *kvm)
5531 if (!kvmppc_uvmem_available())
5534 kvm->arch.svm_enabled = 1;
5539 * IOCTL handler to turn off secure mode of guest
5541 * - Release all device pages
5542 * - Issue ucall to terminate the guest on the UV side
5543 * - Unpin the VPA pages.
5544 * - Reinit the partition scoped page tables
5546 static int kvmhv_svm_off(struct kvm *kvm)
5548 struct kvm_vcpu *vcpu;
5554 if (!(kvm->arch.secure_guest & KVMPPC_SECURE_INIT_START))
5557 mutex_lock(&kvm->arch.mmu_setup_lock);
5558 mmu_was_ready = kvm->arch.mmu_ready;
5559 if (kvm->arch.mmu_ready) {
5560 kvm->arch.mmu_ready = 0;
5561 /* order mmu_ready vs. vcpus_running */
5563 if (atomic_read(&kvm->arch.vcpus_running)) {
5564 kvm->arch.mmu_ready = 1;
5570 srcu_idx = srcu_read_lock(&kvm->srcu);
5571 for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) {
5572 struct kvm_memory_slot *memslot;
5573 struct kvm_memslots *slots = __kvm_memslots(kvm, i);
5578 kvm_for_each_memslot(memslot, slots) {
5579 kvmppc_uvmem_drop_pages(memslot, kvm, true);
5580 uv_unregister_mem_slot(kvm->arch.lpid, memslot->id);
5583 srcu_read_unlock(&kvm->srcu, srcu_idx);
5585 ret = uv_svm_terminate(kvm->arch.lpid);
5586 if (ret != U_SUCCESS) {
5592 * When secure guest is reset, all the guest pages are sent
5593 * to UV via UV_PAGE_IN before the non-boot vcpus get a
5594 * chance to run and unpin their VPA pages. Unpinning of all
5595 * VPA pages is done here explicitly so that VPA pages
5596 * can be migrated to the secure side.
5598 * This is required to for the secure SMP guest to reboot
5601 kvm_for_each_vcpu(i, vcpu, kvm) {
5602 spin_lock(&vcpu->arch.vpa_update_lock);
5603 unpin_vpa_reset(kvm, &vcpu->arch.dtl);
5604 unpin_vpa_reset(kvm, &vcpu->arch.slb_shadow);
5605 unpin_vpa_reset(kvm, &vcpu->arch.vpa);
5606 spin_unlock(&vcpu->arch.vpa_update_lock);
5609 kvmppc_setup_partition_table(kvm);
5610 kvm->arch.secure_guest = 0;
5611 kvm->arch.mmu_ready = mmu_was_ready;
5613 mutex_unlock(&kvm->arch.mmu_setup_lock);
5617 static int kvmhv_enable_dawr1(struct kvm *kvm)
5619 if (!cpu_has_feature(CPU_FTR_DAWR1))
5622 /* kvm == NULL means the caller is testing if the capability exists */
5624 kvm->arch.dawr1_enabled = true;
5628 static bool kvmppc_hash_v3_possible(void)
5630 if (radix_enabled() && no_mixing_hpt_and_radix)
5633 return cpu_has_feature(CPU_FTR_ARCH_300) &&
5634 cpu_has_feature(CPU_FTR_HVMODE);
5637 static struct kvmppc_ops kvm_ops_hv = {
5638 .get_sregs = kvm_arch_vcpu_ioctl_get_sregs_hv,
5639 .set_sregs = kvm_arch_vcpu_ioctl_set_sregs_hv,
5640 .get_one_reg = kvmppc_get_one_reg_hv,
5641 .set_one_reg = kvmppc_set_one_reg_hv,
5642 .vcpu_load = kvmppc_core_vcpu_load_hv,
5643 .vcpu_put = kvmppc_core_vcpu_put_hv,
5644 .inject_interrupt = kvmppc_inject_interrupt_hv,
5645 .set_msr = kvmppc_set_msr_hv,
5646 .vcpu_run = kvmppc_vcpu_run_hv,
5647 .vcpu_create = kvmppc_core_vcpu_create_hv,
5648 .vcpu_free = kvmppc_core_vcpu_free_hv,
5649 .check_requests = kvmppc_core_check_requests_hv,
5650 .get_dirty_log = kvm_vm_ioctl_get_dirty_log_hv,
5651 .flush_memslot = kvmppc_core_flush_memslot_hv,
5652 .prepare_memory_region = kvmppc_core_prepare_memory_region_hv,
5653 .commit_memory_region = kvmppc_core_commit_memory_region_hv,
5654 .unmap_hva_range = kvm_unmap_hva_range_hv,
5655 .age_hva = kvm_age_hva_hv,
5656 .test_age_hva = kvm_test_age_hva_hv,
5657 .set_spte_hva = kvm_set_spte_hva_hv,
5658 .free_memslot = kvmppc_core_free_memslot_hv,
5659 .init_vm = kvmppc_core_init_vm_hv,
5660 .destroy_vm = kvmppc_core_destroy_vm_hv,
5661 .get_smmu_info = kvm_vm_ioctl_get_smmu_info_hv,
5662 .emulate_op = kvmppc_core_emulate_op_hv,
5663 .emulate_mtspr = kvmppc_core_emulate_mtspr_hv,
5664 .emulate_mfspr = kvmppc_core_emulate_mfspr_hv,
5665 .fast_vcpu_kick = kvmppc_fast_vcpu_kick_hv,
5666 .arch_vm_ioctl = kvm_arch_vm_ioctl_hv,
5667 .hcall_implemented = kvmppc_hcall_impl_hv,
5668 #ifdef CONFIG_KVM_XICS
5669 .irq_bypass_add_producer = kvmppc_irq_bypass_add_producer_hv,
5670 .irq_bypass_del_producer = kvmppc_irq_bypass_del_producer_hv,
5672 .configure_mmu = kvmhv_configure_mmu,
5673 .get_rmmu_info = kvmhv_get_rmmu_info,
5674 .set_smt_mode = kvmhv_set_smt_mode,
5675 .enable_nested = kvmhv_enable_nested,
5676 .load_from_eaddr = kvmhv_load_from_eaddr,
5677 .store_to_eaddr = kvmhv_store_to_eaddr,
5678 .enable_svm = kvmhv_enable_svm,
5679 .svm_off = kvmhv_svm_off,
5680 .enable_dawr1 = kvmhv_enable_dawr1,
5681 .hash_v3_possible = kvmppc_hash_v3_possible,
5684 static int kvm_init_subcore_bitmap(void)
5687 int nr_cores = cpu_nr_cores();
5688 struct sibling_subcore_state *sibling_subcore_state;
5690 for (i = 0; i < nr_cores; i++) {
5691 int first_cpu = i * threads_per_core;
5692 int node = cpu_to_node(first_cpu);
5694 /* Ignore if it is already allocated. */
5695 if (paca_ptrs[first_cpu]->sibling_subcore_state)
5698 sibling_subcore_state =
5699 kzalloc_node(sizeof(struct sibling_subcore_state),
5701 if (!sibling_subcore_state)
5705 for (j = 0; j < threads_per_core; j++) {
5706 int cpu = first_cpu + j;
5708 paca_ptrs[cpu]->sibling_subcore_state =
5709 sibling_subcore_state;
5715 static int kvmppc_radix_possible(void)
5717 return cpu_has_feature(CPU_FTR_ARCH_300) && radix_enabled();
5720 static int kvmppc_book3s_init_hv(void)
5724 if (!tlbie_capable) {
5725 pr_err("KVM-HV: Host does not support TLBIE\n");
5730 * FIXME!! Do we need to check on all cpus ?
5732 r = kvmppc_core_check_processor_compat_hv();
5736 r = kvmhv_nested_init();
5740 r = kvm_init_subcore_bitmap();
5745 * We need a way of accessing the XICS interrupt controller,
5746 * either directly, via paca_ptrs[cpu]->kvm_hstate.xics_phys, or
5747 * indirectly, via OPAL.
5750 if (!xics_on_xive() && !kvmhv_on_pseries() &&
5751 !local_paca->kvm_hstate.xics_phys) {
5752 struct device_node *np;
5754 np = of_find_compatible_node(NULL, NULL, "ibm,opal-intc");
5756 pr_err("KVM-HV: Cannot determine method for accessing XICS\n");
5759 /* presence of intc confirmed - node can be dropped again */
5764 kvm_ops_hv.owner = THIS_MODULE;
5765 kvmppc_hv_ops = &kvm_ops_hv;
5767 init_default_hcalls();
5771 r = kvmppc_mmu_hv_init();
5775 if (kvmppc_radix_possible())
5776 r = kvmppc_radix_init();
5779 * POWER9 chips before version 2.02 can't have some threads in
5780 * HPT mode and some in radix mode on the same core.
5782 if (cpu_has_feature(CPU_FTR_ARCH_300)) {
5783 unsigned int pvr = mfspr(SPRN_PVR);
5784 if ((pvr >> 16) == PVR_POWER9 &&
5785 (((pvr & 0xe000) == 0 && (pvr & 0xfff) < 0x202) ||
5786 ((pvr & 0xe000) == 0x2000 && (pvr & 0xfff) < 0x101)))
5787 no_mixing_hpt_and_radix = true;
5790 r = kvmppc_uvmem_init();
5792 pr_err("KVM-HV: kvmppc_uvmem_init failed %d\n", r);
5797 static void kvmppc_book3s_exit_hv(void)
5799 kvmppc_uvmem_free();
5800 kvmppc_free_host_rm_ops();
5801 if (kvmppc_radix_possible())
5802 kvmppc_radix_exit();
5803 kvmppc_hv_ops = NULL;
5804 kvmhv_nested_exit();
5807 module_init(kvmppc_book3s_init_hv);
5808 module_exit(kvmppc_book3s_exit_hv);
5809 MODULE_LICENSE("GPL");
5810 MODULE_ALIAS_MISCDEV(KVM_MINOR);
5811 MODULE_ALIAS("devname:kvm");