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0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved.
0004  *
0005  * Authors:
0006  *    Alexander Graf <agraf@suse.de>
0007  *    Kevin Wolf <mail@kevin-wolf.de>
0008  *
0009  * Description:
0010  * This file is derived from arch/powerpc/kvm/44x.c,
0011  * by Hollis Blanchard <hollisb@us.ibm.com>.
0012  */
0013 
0014 #include <linux/kvm_host.h>
0015 #include <linux/err.h>
0016 #include <linux/export.h>
0017 #include <linux/slab.h>
0018 #include <linux/module.h>
0019 #include <linux/miscdevice.h>
0020 #include <linux/gfp.h>
0021 #include <linux/sched.h>
0022 #include <linux/vmalloc.h>
0023 #include <linux/highmem.h>
0024 
0025 #include <asm/reg.h>
0026 #include <asm/cputable.h>
0027 #include <asm/cacheflush.h>
0028 #include <linux/uaccess.h>
0029 #include <asm/io.h>
0030 #include <asm/kvm_ppc.h>
0031 #include <asm/kvm_book3s.h>
0032 #include <asm/mmu_context.h>
0033 #include <asm/page.h>
0034 #include <asm/xive.h>
0035 
0036 #include "book3s.h"
0037 #include "trace.h"
0038 
0039 /* #define EXIT_DEBUG */
0040 
0041 const struct _kvm_stats_desc kvm_vm_stats_desc[] = {
0042     KVM_GENERIC_VM_STATS(),
0043     STATS_DESC_ICOUNTER(VM, num_2M_pages),
0044     STATS_DESC_ICOUNTER(VM, num_1G_pages)
0045 };
0046 
0047 const struct kvm_stats_header kvm_vm_stats_header = {
0048     .name_size = KVM_STATS_NAME_SIZE,
0049     .num_desc = ARRAY_SIZE(kvm_vm_stats_desc),
0050     .id_offset = sizeof(struct kvm_stats_header),
0051     .desc_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE,
0052     .data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE +
0053                sizeof(kvm_vm_stats_desc),
0054 };
0055 
0056 const struct _kvm_stats_desc kvm_vcpu_stats_desc[] = {
0057     KVM_GENERIC_VCPU_STATS(),
0058     STATS_DESC_COUNTER(VCPU, sum_exits),
0059     STATS_DESC_COUNTER(VCPU, mmio_exits),
0060     STATS_DESC_COUNTER(VCPU, signal_exits),
0061     STATS_DESC_COUNTER(VCPU, light_exits),
0062     STATS_DESC_COUNTER(VCPU, itlb_real_miss_exits),
0063     STATS_DESC_COUNTER(VCPU, itlb_virt_miss_exits),
0064     STATS_DESC_COUNTER(VCPU, dtlb_real_miss_exits),
0065     STATS_DESC_COUNTER(VCPU, dtlb_virt_miss_exits),
0066     STATS_DESC_COUNTER(VCPU, syscall_exits),
0067     STATS_DESC_COUNTER(VCPU, isi_exits),
0068     STATS_DESC_COUNTER(VCPU, dsi_exits),
0069     STATS_DESC_COUNTER(VCPU, emulated_inst_exits),
0070     STATS_DESC_COUNTER(VCPU, dec_exits),
0071     STATS_DESC_COUNTER(VCPU, ext_intr_exits),
0072     STATS_DESC_COUNTER(VCPU, halt_successful_wait),
0073     STATS_DESC_COUNTER(VCPU, dbell_exits),
0074     STATS_DESC_COUNTER(VCPU, gdbell_exits),
0075     STATS_DESC_COUNTER(VCPU, ld),
0076     STATS_DESC_COUNTER(VCPU, st),
0077     STATS_DESC_COUNTER(VCPU, pf_storage),
0078     STATS_DESC_COUNTER(VCPU, pf_instruc),
0079     STATS_DESC_COUNTER(VCPU, sp_storage),
0080     STATS_DESC_COUNTER(VCPU, sp_instruc),
0081     STATS_DESC_COUNTER(VCPU, queue_intr),
0082     STATS_DESC_COUNTER(VCPU, ld_slow),
0083     STATS_DESC_COUNTER(VCPU, st_slow),
0084     STATS_DESC_COUNTER(VCPU, pthru_all),
0085     STATS_DESC_COUNTER(VCPU, pthru_host),
0086     STATS_DESC_COUNTER(VCPU, pthru_bad_aff)
0087 };
0088 
0089 const struct kvm_stats_header kvm_vcpu_stats_header = {
0090     .name_size = KVM_STATS_NAME_SIZE,
0091     .num_desc = ARRAY_SIZE(kvm_vcpu_stats_desc),
0092     .id_offset = sizeof(struct kvm_stats_header),
0093     .desc_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE,
0094     .data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE +
0095                sizeof(kvm_vcpu_stats_desc),
0096 };
0097 
0098 static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
0099             unsigned long pending_now, unsigned long old_pending)
0100 {
0101     if (is_kvmppc_hv_enabled(vcpu->kvm))
0102         return;
0103     if (pending_now)
0104         kvmppc_set_int_pending(vcpu, 1);
0105     else if (old_pending)
0106         kvmppc_set_int_pending(vcpu, 0);
0107 }
0108 
0109 static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
0110 {
0111     ulong crit_raw;
0112     ulong crit_r1;
0113     bool crit;
0114 
0115     if (is_kvmppc_hv_enabled(vcpu->kvm))
0116         return false;
0117 
0118     crit_raw = kvmppc_get_critical(vcpu);
0119     crit_r1 = kvmppc_get_gpr(vcpu, 1);
0120 
0121     /* Truncate crit indicators in 32 bit mode */
0122     if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
0123         crit_raw &= 0xffffffff;
0124         crit_r1 &= 0xffffffff;
0125     }
0126 
0127     /* Critical section when crit == r1 */
0128     crit = (crit_raw == crit_r1);
0129     /* ... and we're in supervisor mode */
0130     crit = crit && !(kvmppc_get_msr(vcpu) & MSR_PR);
0131 
0132     return crit;
0133 }
0134 
0135 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
0136 {
0137     vcpu->kvm->arch.kvm_ops->inject_interrupt(vcpu, vec, flags);
0138 }
0139 
0140 static int kvmppc_book3s_vec2irqprio(unsigned int vec)
0141 {
0142     unsigned int prio;
0143 
0144     switch (vec) {
0145     case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET;     break;
0146     case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK;    break;
0147     case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE;     break;
0148     case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT;     break;
0149     case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE;     break;
0150     case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT;     break;
0151     case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL;     break;
0152     case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT;        break;
0153     case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM;      break;
0154     case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL;       break;
0155     case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER;      break;
0156     case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL;      break;
0157     case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG;        break;
0158     case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC;      break;
0159     case 0xf40: prio = BOOK3S_IRQPRIO_VSX;          break;
0160     case 0xf60: prio = BOOK3S_IRQPRIO_FAC_UNAVAIL;      break;
0161     default:    prio = BOOK3S_IRQPRIO_MAX;          break;
0162     }
0163 
0164     return prio;
0165 }
0166 
0167 void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
0168                       unsigned int vec)
0169 {
0170     unsigned long old_pending = vcpu->arch.pending_exceptions;
0171 
0172     clear_bit(kvmppc_book3s_vec2irqprio(vec),
0173           &vcpu->arch.pending_exceptions);
0174 
0175     kvmppc_update_int_pending(vcpu, vcpu->arch.pending_exceptions,
0176                   old_pending);
0177 }
0178 
0179 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
0180 {
0181     vcpu->stat.queue_intr++;
0182 
0183     set_bit(kvmppc_book3s_vec2irqprio(vec),
0184         &vcpu->arch.pending_exceptions);
0185 #ifdef EXIT_DEBUG
0186     printk(KERN_INFO "Queueing interrupt %x\n", vec);
0187 #endif
0188 }
0189 EXPORT_SYMBOL_GPL(kvmppc_book3s_queue_irqprio);
0190 
0191 void kvmppc_core_queue_machine_check(struct kvm_vcpu *vcpu, ulong flags)
0192 {
0193     /* might as well deliver this straight away */
0194     kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_MACHINE_CHECK, flags);
0195 }
0196 EXPORT_SYMBOL_GPL(kvmppc_core_queue_machine_check);
0197 
0198 void kvmppc_core_queue_syscall(struct kvm_vcpu *vcpu)
0199 {
0200     kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_SYSCALL, 0);
0201 }
0202 EXPORT_SYMBOL(kvmppc_core_queue_syscall);
0203 
0204 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
0205 {
0206     /* might as well deliver this straight away */
0207     kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_PROGRAM, flags);
0208 }
0209 EXPORT_SYMBOL_GPL(kvmppc_core_queue_program);
0210 
0211 void kvmppc_core_queue_fpunavail(struct kvm_vcpu *vcpu)
0212 {
0213     /* might as well deliver this straight away */
0214     kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, 0);
0215 }
0216 
0217 void kvmppc_core_queue_vec_unavail(struct kvm_vcpu *vcpu)
0218 {
0219     /* might as well deliver this straight away */
0220     kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_ALTIVEC, 0);
0221 }
0222 
0223 void kvmppc_core_queue_vsx_unavail(struct kvm_vcpu *vcpu)
0224 {
0225     /* might as well deliver this straight away */
0226     kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_VSX, 0);
0227 }
0228 
0229 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
0230 {
0231     kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
0232 }
0233 EXPORT_SYMBOL_GPL(kvmppc_core_queue_dec);
0234 
0235 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
0236 {
0237     return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
0238 }
0239 EXPORT_SYMBOL_GPL(kvmppc_core_pending_dec);
0240 
0241 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
0242 {
0243     kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
0244 }
0245 EXPORT_SYMBOL_GPL(kvmppc_core_dequeue_dec);
0246 
0247 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
0248                                 struct kvm_interrupt *irq)
0249 {
0250     /*
0251      * This case (KVM_INTERRUPT_SET) should never actually arise for
0252      * a pseries guest (because pseries guests expect their interrupt
0253      * controllers to continue asserting an external interrupt request
0254      * until it is acknowledged at the interrupt controller), but is
0255      * included to avoid ABI breakage and potentially for other
0256      * sorts of guest.
0257      *
0258      * There is a subtlety here: HV KVM does not test the
0259      * external_oneshot flag in the code that synthesizes
0260      * external interrupts for the guest just before entering
0261      * the guest.  That is OK even if userspace did do a
0262      * KVM_INTERRUPT_SET on a pseries guest vcpu, because the
0263      * caller (kvm_vcpu_ioctl_interrupt) does a kvm_vcpu_kick()
0264      * which ends up doing a smp_send_reschedule(), which will
0265      * pull the guest all the way out to the host, meaning that
0266      * we will call kvmppc_core_prepare_to_enter() before entering
0267      * the guest again, and that will handle the external_oneshot
0268      * flag correctly.
0269      */
0270     if (irq->irq == KVM_INTERRUPT_SET)
0271         vcpu->arch.external_oneshot = 1;
0272 
0273     kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
0274 }
0275 
0276 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
0277 {
0278     kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
0279 }
0280 
0281 void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, ulong dar,
0282                     ulong flags)
0283 {
0284     kvmppc_set_dar(vcpu, dar);
0285     kvmppc_set_dsisr(vcpu, flags);
0286     kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE, 0);
0287 }
0288 EXPORT_SYMBOL_GPL(kvmppc_core_queue_data_storage);
0289 
0290 void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong flags)
0291 {
0292     kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_INST_STORAGE, flags);
0293 }
0294 EXPORT_SYMBOL_GPL(kvmppc_core_queue_inst_storage);
0295 
0296 static int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu,
0297                      unsigned int priority)
0298 {
0299     int deliver = 1;
0300     int vec = 0;
0301     bool crit = kvmppc_critical_section(vcpu);
0302 
0303     switch (priority) {
0304     case BOOK3S_IRQPRIO_DECREMENTER:
0305         deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
0306         vec = BOOK3S_INTERRUPT_DECREMENTER;
0307         break;
0308     case BOOK3S_IRQPRIO_EXTERNAL:
0309         deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
0310         vec = BOOK3S_INTERRUPT_EXTERNAL;
0311         break;
0312     case BOOK3S_IRQPRIO_SYSTEM_RESET:
0313         vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
0314         break;
0315     case BOOK3S_IRQPRIO_MACHINE_CHECK:
0316         vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
0317         break;
0318     case BOOK3S_IRQPRIO_DATA_STORAGE:
0319         vec = BOOK3S_INTERRUPT_DATA_STORAGE;
0320         break;
0321     case BOOK3S_IRQPRIO_INST_STORAGE:
0322         vec = BOOK3S_INTERRUPT_INST_STORAGE;
0323         break;
0324     case BOOK3S_IRQPRIO_DATA_SEGMENT:
0325         vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
0326         break;
0327     case BOOK3S_IRQPRIO_INST_SEGMENT:
0328         vec = BOOK3S_INTERRUPT_INST_SEGMENT;
0329         break;
0330     case BOOK3S_IRQPRIO_ALIGNMENT:
0331         vec = BOOK3S_INTERRUPT_ALIGNMENT;
0332         break;
0333     case BOOK3S_IRQPRIO_PROGRAM:
0334         vec = BOOK3S_INTERRUPT_PROGRAM;
0335         break;
0336     case BOOK3S_IRQPRIO_VSX:
0337         vec = BOOK3S_INTERRUPT_VSX;
0338         break;
0339     case BOOK3S_IRQPRIO_ALTIVEC:
0340         vec = BOOK3S_INTERRUPT_ALTIVEC;
0341         break;
0342     case BOOK3S_IRQPRIO_FP_UNAVAIL:
0343         vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
0344         break;
0345     case BOOK3S_IRQPRIO_SYSCALL:
0346         vec = BOOK3S_INTERRUPT_SYSCALL;
0347         break;
0348     case BOOK3S_IRQPRIO_DEBUG:
0349         vec = BOOK3S_INTERRUPT_TRACE;
0350         break;
0351     case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
0352         vec = BOOK3S_INTERRUPT_PERFMON;
0353         break;
0354     case BOOK3S_IRQPRIO_FAC_UNAVAIL:
0355         vec = BOOK3S_INTERRUPT_FAC_UNAVAIL;
0356         break;
0357     default:
0358         deliver = 0;
0359         printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
0360         break;
0361     }
0362 
0363 #if 0
0364     printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
0365 #endif
0366 
0367     if (deliver)
0368         kvmppc_inject_interrupt(vcpu, vec, 0);
0369 
0370     return deliver;
0371 }
0372 
0373 /*
0374  * This function determines if an irqprio should be cleared once issued.
0375  */
0376 static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority)
0377 {
0378     switch (priority) {
0379         case BOOK3S_IRQPRIO_DECREMENTER:
0380             /* DEC interrupts get cleared by mtdec */
0381             return false;
0382         case BOOK3S_IRQPRIO_EXTERNAL:
0383             /*
0384              * External interrupts get cleared by userspace
0385              * except when set by the KVM_INTERRUPT ioctl with
0386              * KVM_INTERRUPT_SET (not KVM_INTERRUPT_SET_LEVEL).
0387              */
0388             if (vcpu->arch.external_oneshot) {
0389                 vcpu->arch.external_oneshot = 0;
0390                 return true;
0391             }
0392             return false;
0393     }
0394 
0395     return true;
0396 }
0397 
0398 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
0399 {
0400     unsigned long *pending = &vcpu->arch.pending_exceptions;
0401     unsigned long old_pending = vcpu->arch.pending_exceptions;
0402     unsigned int priority;
0403 
0404 #ifdef EXIT_DEBUG
0405     if (vcpu->arch.pending_exceptions)
0406         printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
0407 #endif
0408     priority = __ffs(*pending);
0409     while (priority < BOOK3S_IRQPRIO_MAX) {
0410         if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
0411             clear_irqprio(vcpu, priority)) {
0412             clear_bit(priority, &vcpu->arch.pending_exceptions);
0413             break;
0414         }
0415 
0416         priority = find_next_bit(pending,
0417                      BITS_PER_BYTE * sizeof(*pending),
0418                      priority + 1);
0419     }
0420 
0421     /* Tell the guest about our interrupt status */
0422     kvmppc_update_int_pending(vcpu, *pending, old_pending);
0423 
0424     return 0;
0425 }
0426 EXPORT_SYMBOL_GPL(kvmppc_core_prepare_to_enter);
0427 
0428 kvm_pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa, bool writing,
0429             bool *writable)
0430 {
0431     ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM;
0432     gfn_t gfn = gpa >> PAGE_SHIFT;
0433 
0434     if (!(kvmppc_get_msr(vcpu) & MSR_SF))
0435         mp_pa = (uint32_t)mp_pa;
0436 
0437     /* Magic page override */
0438     gpa &= ~0xFFFULL;
0439     if (unlikely(mp_pa) && unlikely((gpa & KVM_PAM) == mp_pa)) {
0440         ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
0441         kvm_pfn_t pfn;
0442 
0443         pfn = (kvm_pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT;
0444         get_page(pfn_to_page(pfn));
0445         if (writable)
0446             *writable = true;
0447         return pfn;
0448     }
0449 
0450     return gfn_to_pfn_prot(vcpu->kvm, gfn, writing, writable);
0451 }
0452 EXPORT_SYMBOL_GPL(kvmppc_gpa_to_pfn);
0453 
0454 int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid,
0455          enum xlate_readwrite xlrw, struct kvmppc_pte *pte)
0456 {
0457     bool data = (xlid == XLATE_DATA);
0458     bool iswrite = (xlrw == XLATE_WRITE);
0459     int relocated = (kvmppc_get_msr(vcpu) & (data ? MSR_DR : MSR_IR));
0460     int r;
0461 
0462     if (relocated) {
0463         r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data, iswrite);
0464     } else {
0465         pte->eaddr = eaddr;
0466         pte->raddr = eaddr & KVM_PAM;
0467         pte->vpage = VSID_REAL | eaddr >> 12;
0468         pte->may_read = true;
0469         pte->may_write = true;
0470         pte->may_execute = true;
0471         r = 0;
0472 
0473         if ((kvmppc_get_msr(vcpu) & (MSR_IR | MSR_DR)) == MSR_DR &&
0474             !data) {
0475             if ((vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) &&
0476                 ((eaddr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS))
0477             pte->raddr &= ~SPLIT_HACK_MASK;
0478         }
0479     }
0480 
0481     return r;
0482 }
0483 
0484 int kvmppc_load_last_inst(struct kvm_vcpu *vcpu,
0485         enum instruction_fetch_type type, u32 *inst)
0486 {
0487     ulong pc = kvmppc_get_pc(vcpu);
0488     int r;
0489 
0490     if (type == INST_SC)
0491         pc -= 4;
0492 
0493     r = kvmppc_ld(vcpu, &pc, sizeof(u32), inst, false);
0494     if (r == EMULATE_DONE)
0495         return r;
0496     else
0497         return EMULATE_AGAIN;
0498 }
0499 EXPORT_SYMBOL_GPL(kvmppc_load_last_inst);
0500 
0501 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
0502 {
0503     return 0;
0504 }
0505 
0506 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
0507 {
0508 }
0509 
0510 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
0511                   struct kvm_sregs *sregs)
0512 {
0513     int ret;
0514 
0515     vcpu_load(vcpu);
0516     ret = vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
0517     vcpu_put(vcpu);
0518 
0519     return ret;
0520 }
0521 
0522 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
0523                   struct kvm_sregs *sregs)
0524 {
0525     int ret;
0526 
0527     vcpu_load(vcpu);
0528     ret = vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
0529     vcpu_put(vcpu);
0530 
0531     return ret;
0532 }
0533 
0534 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
0535 {
0536     int i;
0537 
0538     regs->pc = kvmppc_get_pc(vcpu);
0539     regs->cr = kvmppc_get_cr(vcpu);
0540     regs->ctr = kvmppc_get_ctr(vcpu);
0541     regs->lr = kvmppc_get_lr(vcpu);
0542     regs->xer = kvmppc_get_xer(vcpu);
0543     regs->msr = kvmppc_get_msr(vcpu);
0544     regs->srr0 = kvmppc_get_srr0(vcpu);
0545     regs->srr1 = kvmppc_get_srr1(vcpu);
0546     regs->pid = vcpu->arch.pid;
0547     regs->sprg0 = kvmppc_get_sprg0(vcpu);
0548     regs->sprg1 = kvmppc_get_sprg1(vcpu);
0549     regs->sprg2 = kvmppc_get_sprg2(vcpu);
0550     regs->sprg3 = kvmppc_get_sprg3(vcpu);
0551     regs->sprg4 = kvmppc_get_sprg4(vcpu);
0552     regs->sprg5 = kvmppc_get_sprg5(vcpu);
0553     regs->sprg6 = kvmppc_get_sprg6(vcpu);
0554     regs->sprg7 = kvmppc_get_sprg7(vcpu);
0555 
0556     for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
0557         regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
0558 
0559     return 0;
0560 }
0561 
0562 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
0563 {
0564     int i;
0565 
0566     kvmppc_set_pc(vcpu, regs->pc);
0567     kvmppc_set_cr(vcpu, regs->cr);
0568     kvmppc_set_ctr(vcpu, regs->ctr);
0569     kvmppc_set_lr(vcpu, regs->lr);
0570     kvmppc_set_xer(vcpu, regs->xer);
0571     kvmppc_set_msr(vcpu, regs->msr);
0572     kvmppc_set_srr0(vcpu, regs->srr0);
0573     kvmppc_set_srr1(vcpu, regs->srr1);
0574     kvmppc_set_sprg0(vcpu, regs->sprg0);
0575     kvmppc_set_sprg1(vcpu, regs->sprg1);
0576     kvmppc_set_sprg2(vcpu, regs->sprg2);
0577     kvmppc_set_sprg3(vcpu, regs->sprg3);
0578     kvmppc_set_sprg4(vcpu, regs->sprg4);
0579     kvmppc_set_sprg5(vcpu, regs->sprg5);
0580     kvmppc_set_sprg6(vcpu, regs->sprg6);
0581     kvmppc_set_sprg7(vcpu, regs->sprg7);
0582 
0583     for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
0584         kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
0585 
0586     return 0;
0587 }
0588 
0589 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
0590 {
0591     return -EOPNOTSUPP;
0592 }
0593 
0594 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
0595 {
0596     return -EOPNOTSUPP;
0597 }
0598 
0599 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
0600             union kvmppc_one_reg *val)
0601 {
0602     int r = 0;
0603     long int i;
0604 
0605     r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, id, val);
0606     if (r == -EINVAL) {
0607         r = 0;
0608         switch (id) {
0609         case KVM_REG_PPC_DAR:
0610             *val = get_reg_val(id, kvmppc_get_dar(vcpu));
0611             break;
0612         case KVM_REG_PPC_DSISR:
0613             *val = get_reg_val(id, kvmppc_get_dsisr(vcpu));
0614             break;
0615         case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
0616             i = id - KVM_REG_PPC_FPR0;
0617             *val = get_reg_val(id, VCPU_FPR(vcpu, i));
0618             break;
0619         case KVM_REG_PPC_FPSCR:
0620             *val = get_reg_val(id, vcpu->arch.fp.fpscr);
0621             break;
0622 #ifdef CONFIG_VSX
0623         case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
0624             if (cpu_has_feature(CPU_FTR_VSX)) {
0625                 i = id - KVM_REG_PPC_VSR0;
0626                 val->vsxval[0] = vcpu->arch.fp.fpr[i][0];
0627                 val->vsxval[1] = vcpu->arch.fp.fpr[i][1];
0628             } else {
0629                 r = -ENXIO;
0630             }
0631             break;
0632 #endif /* CONFIG_VSX */
0633         case KVM_REG_PPC_DEBUG_INST:
0634             *val = get_reg_val(id, INS_TW);
0635             break;
0636 #ifdef CONFIG_KVM_XICS
0637         case KVM_REG_PPC_ICP_STATE:
0638             if (!vcpu->arch.icp && !vcpu->arch.xive_vcpu) {
0639                 r = -ENXIO;
0640                 break;
0641             }
0642             if (xics_on_xive())
0643                 *val = get_reg_val(id, kvmppc_xive_get_icp(vcpu));
0644             else
0645                 *val = get_reg_val(id, kvmppc_xics_get_icp(vcpu));
0646             break;
0647 #endif /* CONFIG_KVM_XICS */
0648 #ifdef CONFIG_KVM_XIVE
0649         case KVM_REG_PPC_VP_STATE:
0650             if (!vcpu->arch.xive_vcpu) {
0651                 r = -ENXIO;
0652                 break;
0653             }
0654             if (xive_enabled())
0655                 r = kvmppc_xive_native_get_vp(vcpu, val);
0656             else
0657                 r = -ENXIO;
0658             break;
0659 #endif /* CONFIG_KVM_XIVE */
0660         case KVM_REG_PPC_FSCR:
0661             *val = get_reg_val(id, vcpu->arch.fscr);
0662             break;
0663         case KVM_REG_PPC_TAR:
0664             *val = get_reg_val(id, vcpu->arch.tar);
0665             break;
0666         case KVM_REG_PPC_EBBHR:
0667             *val = get_reg_val(id, vcpu->arch.ebbhr);
0668             break;
0669         case KVM_REG_PPC_EBBRR:
0670             *val = get_reg_val(id, vcpu->arch.ebbrr);
0671             break;
0672         case KVM_REG_PPC_BESCR:
0673             *val = get_reg_val(id, vcpu->arch.bescr);
0674             break;
0675         case KVM_REG_PPC_IC:
0676             *val = get_reg_val(id, vcpu->arch.ic);
0677             break;
0678         default:
0679             r = -EINVAL;
0680             break;
0681         }
0682     }
0683 
0684     return r;
0685 }
0686 
0687 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
0688             union kvmppc_one_reg *val)
0689 {
0690     int r = 0;
0691     long int i;
0692 
0693     r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, id, val);
0694     if (r == -EINVAL) {
0695         r = 0;
0696         switch (id) {
0697         case KVM_REG_PPC_DAR:
0698             kvmppc_set_dar(vcpu, set_reg_val(id, *val));
0699             break;
0700         case KVM_REG_PPC_DSISR:
0701             kvmppc_set_dsisr(vcpu, set_reg_val(id, *val));
0702             break;
0703         case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
0704             i = id - KVM_REG_PPC_FPR0;
0705             VCPU_FPR(vcpu, i) = set_reg_val(id, *val);
0706             break;
0707         case KVM_REG_PPC_FPSCR:
0708             vcpu->arch.fp.fpscr = set_reg_val(id, *val);
0709             break;
0710 #ifdef CONFIG_VSX
0711         case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
0712             if (cpu_has_feature(CPU_FTR_VSX)) {
0713                 i = id - KVM_REG_PPC_VSR0;
0714                 vcpu->arch.fp.fpr[i][0] = val->vsxval[0];
0715                 vcpu->arch.fp.fpr[i][1] = val->vsxval[1];
0716             } else {
0717                 r = -ENXIO;
0718             }
0719             break;
0720 #endif /* CONFIG_VSX */
0721 #ifdef CONFIG_KVM_XICS
0722         case KVM_REG_PPC_ICP_STATE:
0723             if (!vcpu->arch.icp && !vcpu->arch.xive_vcpu) {
0724                 r = -ENXIO;
0725                 break;
0726             }
0727             if (xics_on_xive())
0728                 r = kvmppc_xive_set_icp(vcpu, set_reg_val(id, *val));
0729             else
0730                 r = kvmppc_xics_set_icp(vcpu, set_reg_val(id, *val));
0731             break;
0732 #endif /* CONFIG_KVM_XICS */
0733 #ifdef CONFIG_KVM_XIVE
0734         case KVM_REG_PPC_VP_STATE:
0735             if (!vcpu->arch.xive_vcpu) {
0736                 r = -ENXIO;
0737                 break;
0738             }
0739             if (xive_enabled())
0740                 r = kvmppc_xive_native_set_vp(vcpu, val);
0741             else
0742                 r = -ENXIO;
0743             break;
0744 #endif /* CONFIG_KVM_XIVE */
0745         case KVM_REG_PPC_FSCR:
0746             vcpu->arch.fscr = set_reg_val(id, *val);
0747             break;
0748         case KVM_REG_PPC_TAR:
0749             vcpu->arch.tar = set_reg_val(id, *val);
0750             break;
0751         case KVM_REG_PPC_EBBHR:
0752             vcpu->arch.ebbhr = set_reg_val(id, *val);
0753             break;
0754         case KVM_REG_PPC_EBBRR:
0755             vcpu->arch.ebbrr = set_reg_val(id, *val);
0756             break;
0757         case KVM_REG_PPC_BESCR:
0758             vcpu->arch.bescr = set_reg_val(id, *val);
0759             break;
0760         case KVM_REG_PPC_IC:
0761             vcpu->arch.ic = set_reg_val(id, *val);
0762             break;
0763         default:
0764             r = -EINVAL;
0765             break;
0766         }
0767     }
0768 
0769     return r;
0770 }
0771 
0772 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
0773 {
0774     vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu);
0775 }
0776 
0777 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
0778 {
0779     vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu);
0780 }
0781 
0782 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
0783 {
0784     vcpu->kvm->arch.kvm_ops->set_msr(vcpu, msr);
0785 }
0786 EXPORT_SYMBOL_GPL(kvmppc_set_msr);
0787 
0788 int kvmppc_vcpu_run(struct kvm_vcpu *vcpu)
0789 {
0790     return vcpu->kvm->arch.kvm_ops->vcpu_run(vcpu);
0791 }
0792 
0793 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
0794                                   struct kvm_translation *tr)
0795 {
0796     return 0;
0797 }
0798 
0799 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
0800                     struct kvm_guest_debug *dbg)
0801 {
0802     vcpu_load(vcpu);
0803     vcpu->guest_debug = dbg->control;
0804     vcpu_put(vcpu);
0805     return 0;
0806 }
0807 
0808 void kvmppc_decrementer_func(struct kvm_vcpu *vcpu)
0809 {
0810     kvmppc_core_queue_dec(vcpu);
0811     kvm_vcpu_kick(vcpu);
0812 }
0813 
0814 int kvmppc_core_vcpu_create(struct kvm_vcpu *vcpu)
0815 {
0816     return vcpu->kvm->arch.kvm_ops->vcpu_create(vcpu);
0817 }
0818 
0819 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
0820 {
0821     vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
0822 }
0823 
0824 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
0825 {
0826     return vcpu->kvm->arch.kvm_ops->check_requests(vcpu);
0827 }
0828 
0829 void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot)
0830 {
0831 
0832 }
0833 
0834 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
0835 {
0836     return kvm->arch.kvm_ops->get_dirty_log(kvm, log);
0837 }
0838 
0839 void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot)
0840 {
0841     kvm->arch.kvm_ops->free_memslot(slot);
0842 }
0843 
0844 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
0845 {
0846     kvm->arch.kvm_ops->flush_memslot(kvm, memslot);
0847 }
0848 
0849 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
0850                       const struct kvm_memory_slot *old,
0851                       struct kvm_memory_slot *new,
0852                       enum kvm_mr_change change)
0853 {
0854     return kvm->arch.kvm_ops->prepare_memory_region(kvm, old, new, change);
0855 }
0856 
0857 void kvmppc_core_commit_memory_region(struct kvm *kvm,
0858                 struct kvm_memory_slot *old,
0859                 const struct kvm_memory_slot *new,
0860                 enum kvm_mr_change change)
0861 {
0862     kvm->arch.kvm_ops->commit_memory_region(kvm, old, new, change);
0863 }
0864 
0865 bool kvm_unmap_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range)
0866 {
0867     return kvm->arch.kvm_ops->unmap_gfn_range(kvm, range);
0868 }
0869 
0870 bool kvm_age_gfn(struct kvm *kvm, struct kvm_gfn_range *range)
0871 {
0872     return kvm->arch.kvm_ops->age_gfn(kvm, range);
0873 }
0874 
0875 bool kvm_test_age_gfn(struct kvm *kvm, struct kvm_gfn_range *range)
0876 {
0877     return kvm->arch.kvm_ops->test_age_gfn(kvm, range);
0878 }
0879 
0880 bool kvm_set_spte_gfn(struct kvm *kvm, struct kvm_gfn_range *range)
0881 {
0882     return kvm->arch.kvm_ops->set_spte_gfn(kvm, range);
0883 }
0884 
0885 int kvmppc_core_init_vm(struct kvm *kvm)
0886 {
0887 
0888 #ifdef CONFIG_PPC64
0889     INIT_LIST_HEAD_RCU(&kvm->arch.spapr_tce_tables);
0890     INIT_LIST_HEAD(&kvm->arch.rtas_tokens);
0891     mutex_init(&kvm->arch.rtas_token_lock);
0892 #endif
0893 
0894     return kvm->arch.kvm_ops->init_vm(kvm);
0895 }
0896 
0897 void kvmppc_core_destroy_vm(struct kvm *kvm)
0898 {
0899     kvm->arch.kvm_ops->destroy_vm(kvm);
0900 
0901 #ifdef CONFIG_PPC64
0902     kvmppc_rtas_tokens_free(kvm);
0903     WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
0904 #endif
0905 
0906 #ifdef CONFIG_KVM_XICS
0907     /*
0908      * Free the XIVE and XICS devices which are not directly freed by the
0909      * device 'release' method
0910      */
0911     kfree(kvm->arch.xive_devices.native);
0912     kvm->arch.xive_devices.native = NULL;
0913     kfree(kvm->arch.xive_devices.xics_on_xive);
0914     kvm->arch.xive_devices.xics_on_xive = NULL;
0915     kfree(kvm->arch.xics_device);
0916     kvm->arch.xics_device = NULL;
0917 #endif /* CONFIG_KVM_XICS */
0918 }
0919 
0920 int kvmppc_h_logical_ci_load(struct kvm_vcpu *vcpu)
0921 {
0922     unsigned long size = kvmppc_get_gpr(vcpu, 4);
0923     unsigned long addr = kvmppc_get_gpr(vcpu, 5);
0924     u64 buf;
0925     int srcu_idx;
0926     int ret;
0927 
0928     if (!is_power_of_2(size) || (size > sizeof(buf)))
0929         return H_TOO_HARD;
0930 
0931     srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
0932     ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, addr, size, &buf);
0933     srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
0934     if (ret != 0)
0935         return H_TOO_HARD;
0936 
0937     switch (size) {
0938     case 1:
0939         kvmppc_set_gpr(vcpu, 4, *(u8 *)&buf);
0940         break;
0941 
0942     case 2:
0943         kvmppc_set_gpr(vcpu, 4, be16_to_cpu(*(__be16 *)&buf));
0944         break;
0945 
0946     case 4:
0947         kvmppc_set_gpr(vcpu, 4, be32_to_cpu(*(__be32 *)&buf));
0948         break;
0949 
0950     case 8:
0951         kvmppc_set_gpr(vcpu, 4, be64_to_cpu(*(__be64 *)&buf));
0952         break;
0953 
0954     default:
0955         BUG();
0956     }
0957 
0958     return H_SUCCESS;
0959 }
0960 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_load);
0961 
0962 int kvmppc_h_logical_ci_store(struct kvm_vcpu *vcpu)
0963 {
0964     unsigned long size = kvmppc_get_gpr(vcpu, 4);
0965     unsigned long addr = kvmppc_get_gpr(vcpu, 5);
0966     unsigned long val = kvmppc_get_gpr(vcpu, 6);
0967     u64 buf;
0968     int srcu_idx;
0969     int ret;
0970 
0971     switch (size) {
0972     case 1:
0973         *(u8 *)&buf = val;
0974         break;
0975 
0976     case 2:
0977         *(__be16 *)&buf = cpu_to_be16(val);
0978         break;
0979 
0980     case 4:
0981         *(__be32 *)&buf = cpu_to_be32(val);
0982         break;
0983 
0984     case 8:
0985         *(__be64 *)&buf = cpu_to_be64(val);
0986         break;
0987 
0988     default:
0989         return H_TOO_HARD;
0990     }
0991 
0992     srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
0993     ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, addr, size, &buf);
0994     srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
0995     if (ret != 0)
0996         return H_TOO_HARD;
0997 
0998     return H_SUCCESS;
0999 }
1000 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_store);
1001 
1002 int kvmppc_core_check_processor_compat(void)
1003 {
1004     /*
1005      * We always return 0 for book3s. We check
1006      * for compatibility while loading the HV
1007      * or PR module
1008      */
1009     return 0;
1010 }
1011 
1012 int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hcall)
1013 {
1014     return kvm->arch.kvm_ops->hcall_implemented(hcall);
1015 }
1016 
1017 #ifdef CONFIG_KVM_XICS
1018 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
1019         bool line_status)
1020 {
1021     if (xics_on_xive())
1022         return kvmppc_xive_set_irq(kvm, irq_source_id, irq, level,
1023                        line_status);
1024     else
1025         return kvmppc_xics_set_irq(kvm, irq_source_id, irq, level,
1026                        line_status);
1027 }
1028 
1029 int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *irq_entry,
1030                   struct kvm *kvm, int irq_source_id,
1031                   int level, bool line_status)
1032 {
1033     return kvm_set_irq(kvm, irq_source_id, irq_entry->gsi,
1034                level, line_status);
1035 }
1036 static int kvmppc_book3s_set_irq(struct kvm_kernel_irq_routing_entry *e,
1037                  struct kvm *kvm, int irq_source_id, int level,
1038                  bool line_status)
1039 {
1040     return kvm_set_irq(kvm, irq_source_id, e->gsi, level, line_status);
1041 }
1042 
1043 int kvm_irq_map_gsi(struct kvm *kvm,
1044             struct kvm_kernel_irq_routing_entry *entries, int gsi)
1045 {
1046     entries->gsi = gsi;
1047     entries->type = KVM_IRQ_ROUTING_IRQCHIP;
1048     entries->set = kvmppc_book3s_set_irq;
1049     entries->irqchip.irqchip = 0;
1050     entries->irqchip.pin = gsi;
1051     return 1;
1052 }
1053 
1054 int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin)
1055 {
1056     return pin;
1057 }
1058 
1059 #endif /* CONFIG_KVM_XICS */
1060 
1061 static int kvmppc_book3s_init(void)
1062 {
1063     int r;
1064 
1065     r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
1066     if (r)
1067         return r;
1068 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1069     r = kvmppc_book3s_init_pr();
1070 #endif
1071 
1072 #ifdef CONFIG_KVM_XICS
1073 #ifdef CONFIG_KVM_XIVE
1074     if (xics_on_xive()) {
1075         kvm_register_device_ops(&kvm_xive_ops, KVM_DEV_TYPE_XICS);
1076         if (kvmppc_xive_native_supported())
1077             kvm_register_device_ops(&kvm_xive_native_ops,
1078                         KVM_DEV_TYPE_XIVE);
1079     } else
1080 #endif
1081         kvm_register_device_ops(&kvm_xics_ops, KVM_DEV_TYPE_XICS);
1082 #endif
1083     return r;
1084 }
1085 
1086 static void kvmppc_book3s_exit(void)
1087 {
1088 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1089     kvmppc_book3s_exit_pr();
1090 #endif
1091     kvm_exit();
1092 }
1093 
1094 module_init(kvmppc_book3s_init);
1095 module_exit(kvmppc_book3s_exit);
1096 
1097 /* On 32bit this is our one and only kernel module */
1098 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1099 MODULE_ALIAS_MISCDEV(KVM_MINOR);
1100 MODULE_ALIAS("devname:kvm");
1101 #endif
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