2 * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved.
5 * Alexander Graf <agraf@suse.de>
6 * Kevin Wolf <mail@kevin-wolf.de>
9 * This file is derived from arch/powerpc/kvm/44x.c,
10 * by Hollis Blanchard <hollisb@us.ibm.com>.
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License, version 2, as
14 * published by the Free Software Foundation.
17 #include <linux/kvm_host.h>
18 #include <linux/err.h>
21 #include <asm/cputable.h>
22 #include <asm/cacheflush.h>
23 #include <asm/tlbflush.h>
24 #include <asm/uaccess.h>
26 #include <asm/kvm_ppc.h>
27 #include <asm/kvm_book3s.h>
28 #include <asm/mmu_context.h>
29 #include <linux/gfp.h>
30 #include <linux/sched.h>
31 #include <linux/vmalloc.h>
33 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
35 /* #define EXIT_DEBUG */
36 /* #define EXIT_DEBUG_SIMPLE */
37 /* #define DEBUG_EXT */
39 static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
42 struct kvm_stats_debugfs_item debugfs_entries[] = {
43 { "exits", VCPU_STAT(sum_exits) },
44 { "mmio", VCPU_STAT(mmio_exits) },
45 { "sig", VCPU_STAT(signal_exits) },
46 { "sysc", VCPU_STAT(syscall_exits) },
47 { "inst_emu", VCPU_STAT(emulated_inst_exits) },
48 { "dec", VCPU_STAT(dec_exits) },
49 { "ext_intr", VCPU_STAT(ext_intr_exits) },
50 { "queue_intr", VCPU_STAT(queue_intr) },
51 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
52 { "pf_storage", VCPU_STAT(pf_storage) },
53 { "sp_storage", VCPU_STAT(sp_storage) },
54 { "pf_instruc", VCPU_STAT(pf_instruc) },
55 { "sp_instruc", VCPU_STAT(sp_instruc) },
56 { "ld", VCPU_STAT(ld) },
57 { "ld_slow", VCPU_STAT(ld_slow) },
58 { "st", VCPU_STAT(st) },
59 { "st_slow", VCPU_STAT(st_slow) },
63 void kvmppc_core_load_host_debugstate(struct kvm_vcpu *vcpu)
67 void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu)
71 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
73 memcpy(get_paca()->kvm_slb, to_book3s(vcpu)->slb_shadow, sizeof(get_paca()->kvm_slb));
74 memcpy(&get_paca()->shadow_vcpu, &to_book3s(vcpu)->shadow_vcpu,
75 sizeof(get_paca()->shadow_vcpu));
76 get_paca()->kvm_slb_max = to_book3s(vcpu)->slb_shadow_max;
79 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
81 memcpy(to_book3s(vcpu)->slb_shadow, get_paca()->kvm_slb, sizeof(get_paca()->kvm_slb));
82 memcpy(&to_book3s(vcpu)->shadow_vcpu, &get_paca()->shadow_vcpu,
83 sizeof(get_paca()->shadow_vcpu));
84 to_book3s(vcpu)->slb_shadow_max = get_paca()->kvm_slb_max;
86 kvmppc_giveup_ext(vcpu, MSR_FP);
87 kvmppc_giveup_ext(vcpu, MSR_VEC);
88 kvmppc_giveup_ext(vcpu, MSR_VSX);
91 #if defined(EXIT_DEBUG)
92 static u32 kvmppc_get_dec(struct kvm_vcpu *vcpu)
94 u64 jd = mftb() - vcpu->arch.dec_jiffies;
95 return vcpu->arch.dec - jd;
99 static void kvmppc_recalc_shadow_msr(struct kvm_vcpu *vcpu)
101 vcpu->arch.shadow_msr = vcpu->arch.msr;
102 /* Guest MSR values */
103 vcpu->arch.shadow_msr &= MSR_FE0 | MSR_FE1 | MSR_SF | MSR_SE |
105 /* Process MSR values */
106 vcpu->arch.shadow_msr |= MSR_ME | MSR_RI | MSR_IR | MSR_DR | MSR_PR |
108 /* External providers the guest reserved */
109 vcpu->arch.shadow_msr |= (vcpu->arch.msr & vcpu->arch.guest_owned_ext);
110 /* 64-bit Process MSR values */
111 #ifdef CONFIG_PPC_BOOK3S_64
112 vcpu->arch.shadow_msr |= MSR_ISF | MSR_HV;
116 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
118 ulong old_msr = vcpu->arch.msr;
121 printk(KERN_INFO "KVM: Set MSR to 0x%llx\n", msr);
124 msr &= to_book3s(vcpu)->msr_mask;
125 vcpu->arch.msr = msr;
126 kvmppc_recalc_shadow_msr(vcpu);
128 if (msr & (MSR_WE|MSR_POW)) {
129 if (!vcpu->arch.pending_exceptions) {
130 kvm_vcpu_block(vcpu);
131 vcpu->stat.halt_wakeup++;
135 if (((vcpu->arch.msr & (MSR_IR|MSR_DR)) != (old_msr & (MSR_IR|MSR_DR))) ||
136 (vcpu->arch.msr & MSR_PR) != (old_msr & MSR_PR)) {
137 bool dr = (vcpu->arch.msr & MSR_DR) ? true : false;
138 bool ir = (vcpu->arch.msr & MSR_IR) ? true : false;
140 /* Flush split mode PTEs */
142 kvmppc_mmu_pte_vflush(vcpu, VSID_SPLIT_MASK,
145 kvmppc_mmu_flush_segments(vcpu);
146 kvmppc_mmu_map_segment(vcpu, vcpu->arch.pc);
149 /* Preload FPU if it's enabled */
150 if (vcpu->arch.msr & MSR_FP)
151 kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
154 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
156 vcpu->arch.srr0 = vcpu->arch.pc;
157 vcpu->arch.srr1 = vcpu->arch.msr | flags;
158 vcpu->arch.pc = to_book3s(vcpu)->hior + vec;
159 vcpu->arch.mmu.reset_msr(vcpu);
162 static int kvmppc_book3s_vec2irqprio(unsigned int vec)
167 case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET; break;
168 case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK; break;
169 case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE; break;
170 case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT; break;
171 case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE; break;
172 case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT; break;
173 case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL; break;
174 case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT; break;
175 case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM; break;
176 case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL; break;
177 case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER; break;
178 case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL; break;
179 case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG; break;
180 case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC; break;
181 case 0xf40: prio = BOOK3S_IRQPRIO_VSX; break;
182 default: prio = BOOK3S_IRQPRIO_MAX; break;
188 static void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
191 clear_bit(kvmppc_book3s_vec2irqprio(vec),
192 &vcpu->arch.pending_exceptions);
195 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
197 vcpu->stat.queue_intr++;
199 set_bit(kvmppc_book3s_vec2irqprio(vec),
200 &vcpu->arch.pending_exceptions);
202 printk(KERN_INFO "Queueing interrupt %x\n", vec);
207 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
209 to_book3s(vcpu)->prog_flags = flags;
210 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_PROGRAM);
213 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
215 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
218 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
220 return test_bit(BOOK3S_INTERRUPT_DECREMENTER >> 7, &vcpu->arch.pending_exceptions);
223 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
225 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
228 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
229 struct kvm_interrupt *irq)
231 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
234 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu,
235 struct kvm_interrupt *irq)
237 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
240 int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority)
247 case BOOK3S_IRQPRIO_DECREMENTER:
248 deliver = vcpu->arch.msr & MSR_EE;
249 vec = BOOK3S_INTERRUPT_DECREMENTER;
251 case BOOK3S_IRQPRIO_EXTERNAL:
252 deliver = vcpu->arch.msr & MSR_EE;
253 vec = BOOK3S_INTERRUPT_EXTERNAL;
255 case BOOK3S_IRQPRIO_SYSTEM_RESET:
256 vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
258 case BOOK3S_IRQPRIO_MACHINE_CHECK:
259 vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
261 case BOOK3S_IRQPRIO_DATA_STORAGE:
262 vec = BOOK3S_INTERRUPT_DATA_STORAGE;
264 case BOOK3S_IRQPRIO_INST_STORAGE:
265 vec = BOOK3S_INTERRUPT_INST_STORAGE;
267 case BOOK3S_IRQPRIO_DATA_SEGMENT:
268 vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
270 case BOOK3S_IRQPRIO_INST_SEGMENT:
271 vec = BOOK3S_INTERRUPT_INST_SEGMENT;
273 case BOOK3S_IRQPRIO_ALIGNMENT:
274 vec = BOOK3S_INTERRUPT_ALIGNMENT;
276 case BOOK3S_IRQPRIO_PROGRAM:
277 vec = BOOK3S_INTERRUPT_PROGRAM;
278 flags = to_book3s(vcpu)->prog_flags;
280 case BOOK3S_IRQPRIO_VSX:
281 vec = BOOK3S_INTERRUPT_VSX;
283 case BOOK3S_IRQPRIO_ALTIVEC:
284 vec = BOOK3S_INTERRUPT_ALTIVEC;
286 case BOOK3S_IRQPRIO_FP_UNAVAIL:
287 vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
289 case BOOK3S_IRQPRIO_SYSCALL:
290 vec = BOOK3S_INTERRUPT_SYSCALL;
292 case BOOK3S_IRQPRIO_DEBUG:
293 vec = BOOK3S_INTERRUPT_TRACE;
295 case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
296 vec = BOOK3S_INTERRUPT_PERFMON;
300 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
305 printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
309 kvmppc_inject_interrupt(vcpu, vec, flags);
314 void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
316 unsigned long *pending = &vcpu->arch.pending_exceptions;
317 unsigned int priority;
320 if (vcpu->arch.pending_exceptions)
321 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
323 priority = __ffs(*pending);
324 while (priority <= (sizeof(unsigned int) * 8)) {
325 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
326 (priority != BOOK3S_IRQPRIO_DECREMENTER)) {
327 /* DEC interrupts get cleared by mtdec */
328 clear_bit(priority, &vcpu->arch.pending_exceptions);
332 priority = find_next_bit(pending,
333 BITS_PER_BYTE * sizeof(*pending),
338 void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr)
340 vcpu->arch.hflags &= ~BOOK3S_HFLAG_SLB;
341 vcpu->arch.pvr = pvr;
342 if ((pvr >= 0x330000) && (pvr < 0x70330000)) {
343 kvmppc_mmu_book3s_64_init(vcpu);
344 to_book3s(vcpu)->hior = 0xfff00000;
345 to_book3s(vcpu)->msr_mask = 0xffffffffffffffffULL;
347 kvmppc_mmu_book3s_32_init(vcpu);
348 to_book3s(vcpu)->hior = 0;
349 to_book3s(vcpu)->msr_mask = 0xffffffffULL;
352 /* If we are in hypervisor level on 970, we can tell the CPU to
353 * treat DCBZ as 32 bytes store */
354 vcpu->arch.hflags &= ~BOOK3S_HFLAG_DCBZ32;
355 if (vcpu->arch.mmu.is_dcbz32(vcpu) && (mfmsr() & MSR_HV) &&
356 !strcmp(cur_cpu_spec->platform, "ppc970"))
357 vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
361 /* Book3s_32 CPUs always have 32 bytes cache line size, which Linux assumes. To
362 * make Book3s_32 Linux work on Book3s_64, we have to make sure we trap dcbz to
363 * emulate 32 bytes dcbz length.
365 * The Book3s_64 inventors also realized this case and implemented a special bit
366 * in the HID5 register, which is a hypervisor ressource. Thus we can't use it.
368 * My approach here is to patch the dcbz instruction on executing pages.
370 static void kvmppc_patch_dcbz(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte)
372 bool touched = false;
377 hpage = gfn_to_hva(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
378 if (kvm_is_error_hva(hpage))
381 hpage |= pte->raddr & ~PAGE_MASK;
384 page = vmalloc(HW_PAGE_SIZE);
386 if (copy_from_user(page, (void __user *)hpage, HW_PAGE_SIZE))
389 for (i=0; i < HW_PAGE_SIZE / 4; i++)
390 if ((page[i] & 0xff0007ff) == INS_DCBZ) {
391 page[i] &= 0xfffffff7; // reserved instruction, so we trap
396 copy_to_user((void __user *)hpage, page, HW_PAGE_SIZE);
402 static int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, bool data,
403 struct kvmppc_pte *pte)
405 int relocated = (vcpu->arch.msr & (data ? MSR_DR : MSR_IR));
409 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data);
412 pte->raddr = eaddr & 0xffffffff;
413 pte->vpage = VSID_REAL | eaddr >> 12;
414 pte->may_read = true;
415 pte->may_write = true;
416 pte->may_execute = true;
423 static hva_t kvmppc_bad_hva(void)
428 static hva_t kvmppc_pte_to_hva(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte,
433 if (read && !pte->may_read)
436 if (!read && !pte->may_write)
439 hpage = gfn_to_hva(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
440 if (kvm_is_error_hva(hpage))
443 return hpage | (pte->raddr & ~PAGE_MASK);
445 return kvmppc_bad_hva();
448 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
451 struct kvmppc_pte pte;
456 if (kvmppc_xlate(vcpu, *eaddr, data, &pte))
461 hva = kvmppc_pte_to_hva(vcpu, &pte, false);
462 if (kvm_is_error_hva(hva))
465 if (copy_to_user((void __user *)hva, ptr, size)) {
466 printk(KERN_INFO "kvmppc_st at 0x%lx failed\n", hva);
475 return EMULATE_DO_MMIO;
478 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
481 struct kvmppc_pte pte;
486 if (kvmppc_xlate(vcpu, *eaddr, data, &pte))
491 hva = kvmppc_pte_to_hva(vcpu, &pte, true);
492 if (kvm_is_error_hva(hva))
495 if (copy_from_user(ptr, (void __user *)hva, size)) {
496 printk(KERN_INFO "kvmppc_ld at 0x%lx failed\n", hva);
505 return EMULATE_DO_MMIO;
508 static int kvmppc_visible_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
510 return kvm_is_visible_gfn(vcpu->kvm, gfn);
513 int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu,
514 ulong eaddr, int vec)
516 bool data = (vec == BOOK3S_INTERRUPT_DATA_STORAGE);
517 int r = RESUME_GUEST;
520 struct kvmppc_pte pte;
521 bool is_mmio = false;
522 bool dr = (vcpu->arch.msr & MSR_DR) ? true : false;
523 bool ir = (vcpu->arch.msr & MSR_IR) ? true : false;
525 relocated = data ? dr : ir;
527 /* Resolve real address if translation turned on */
529 page_found = vcpu->arch.mmu.xlate(vcpu, eaddr, &pte, data);
531 pte.may_execute = true;
533 pte.may_write = true;
534 pte.raddr = eaddr & 0xffffffff;
536 pte.vpage = eaddr >> 12;
539 switch (vcpu->arch.msr & (MSR_DR|MSR_IR)) {
541 pte.vpage |= VSID_REAL;
544 pte.vpage |= VSID_REAL_DR;
547 pte.vpage |= VSID_REAL_IR;
551 if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
552 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
554 * If we do the dcbz hack, we have to NX on every execution,
555 * so we can patch the executing code. This renders our guest
558 pte.may_execute = !data;
561 if (page_found == -ENOENT) {
562 /* Page not found in guest PTE entries */
563 vcpu->arch.dear = vcpu->arch.fault_dear;
564 to_book3s(vcpu)->dsisr = vcpu->arch.fault_dsisr;
565 vcpu->arch.msr |= (vcpu->arch.shadow_srr1 & 0x00000000f8000000ULL);
566 kvmppc_book3s_queue_irqprio(vcpu, vec);
567 } else if (page_found == -EPERM) {
568 /* Storage protection */
569 vcpu->arch.dear = vcpu->arch.fault_dear;
570 to_book3s(vcpu)->dsisr = vcpu->arch.fault_dsisr & ~DSISR_NOHPTE;
571 to_book3s(vcpu)->dsisr |= DSISR_PROTFAULT;
572 vcpu->arch.msr |= (vcpu->arch.shadow_srr1 & 0x00000000f8000000ULL);
573 kvmppc_book3s_queue_irqprio(vcpu, vec);
574 } else if (page_found == -EINVAL) {
575 /* Page not found in guest SLB */
576 vcpu->arch.dear = vcpu->arch.fault_dear;
577 kvmppc_book3s_queue_irqprio(vcpu, vec + 0x80);
578 } else if (!is_mmio &&
579 kvmppc_visible_gfn(vcpu, pte.raddr >> PAGE_SHIFT)) {
580 /* The guest's PTE is not mapped yet. Map on the host */
581 kvmppc_mmu_map_page(vcpu, &pte);
583 vcpu->stat.sp_storage++;
584 else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
585 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32)))
586 kvmppc_patch_dcbz(vcpu, &pte);
589 vcpu->stat.mmio_exits++;
590 vcpu->arch.paddr_accessed = pte.raddr;
591 r = kvmppc_emulate_mmio(run, vcpu);
592 if ( r == RESUME_HOST_NV )
599 static inline int get_fpr_index(int i)
607 /* Give up external provider (FPU, Altivec, VSX) */
608 void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr)
610 struct thread_struct *t = ¤t->thread;
611 u64 *vcpu_fpr = vcpu->arch.fpr;
613 u64 *vcpu_vsx = vcpu->arch.vsr;
615 u64 *thread_fpr = (u64*)t->fpr;
618 if (!(vcpu->arch.guest_owned_ext & msr))
622 printk(KERN_INFO "Giving up ext 0x%lx\n", msr);
628 for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++)
629 vcpu_fpr[i] = thread_fpr[get_fpr_index(i)];
631 vcpu->arch.fpscr = t->fpscr.val;
634 #ifdef CONFIG_ALTIVEC
635 giveup_altivec(current);
636 memcpy(vcpu->arch.vr, t->vr, sizeof(vcpu->arch.vr));
637 vcpu->arch.vscr = t->vscr;
642 __giveup_vsx(current);
643 for (i = 0; i < ARRAY_SIZE(vcpu->arch.vsr); i++)
644 vcpu_vsx[i] = thread_fpr[get_fpr_index(i) + 1];
651 vcpu->arch.guest_owned_ext &= ~msr;
652 current->thread.regs->msr &= ~msr;
653 kvmppc_recalc_shadow_msr(vcpu);
656 static int kvmppc_read_inst(struct kvm_vcpu *vcpu)
658 ulong srr0 = vcpu->arch.pc;
661 ret = kvmppc_ld(vcpu, &srr0, sizeof(u32), &vcpu->arch.last_inst, false);
662 if (ret == -ENOENT) {
663 vcpu->arch.msr = kvmppc_set_field(vcpu->arch.msr, 33, 33, 1);
664 vcpu->arch.msr = kvmppc_set_field(vcpu->arch.msr, 34, 36, 0);
665 vcpu->arch.msr = kvmppc_set_field(vcpu->arch.msr, 42, 47, 0);
666 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE);
667 return EMULATE_AGAIN;
673 static int kvmppc_check_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr)
676 /* Need to do paired single emulation? */
677 if (!(vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE))
680 /* Read out the instruction */
681 if (kvmppc_read_inst(vcpu) == EMULATE_DONE)
682 /* Need to emulate */
685 return EMULATE_AGAIN;
688 /* Handle external providers (FPU, Altivec, VSX) */
689 static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
692 struct thread_struct *t = ¤t->thread;
693 u64 *vcpu_fpr = vcpu->arch.fpr;
695 u64 *vcpu_vsx = vcpu->arch.vsr;
697 u64 *thread_fpr = (u64*)t->fpr;
700 /* When we have paired singles, we emulate in software */
701 if (vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE)
704 if (!(vcpu->arch.msr & msr)) {
705 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
709 /* We already own the ext */
710 if (vcpu->arch.guest_owned_ext & msr) {
715 printk(KERN_INFO "Loading up ext 0x%lx\n", msr);
718 current->thread.regs->msr |= msr;
722 for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++)
723 thread_fpr[get_fpr_index(i)] = vcpu_fpr[i];
725 t->fpscr.val = vcpu->arch.fpscr;
727 kvmppc_load_up_fpu();
730 #ifdef CONFIG_ALTIVEC
731 memcpy(t->vr, vcpu->arch.vr, sizeof(vcpu->arch.vr));
732 t->vscr = vcpu->arch.vscr;
734 kvmppc_load_up_altivec();
739 for (i = 0; i < ARRAY_SIZE(vcpu->arch.vsr); i++)
740 thread_fpr[get_fpr_index(i) + 1] = vcpu_vsx[i];
741 kvmppc_load_up_vsx();
748 vcpu->arch.guest_owned_ext |= msr;
750 kvmppc_recalc_shadow_msr(vcpu);
755 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
756 unsigned int exit_nr)
760 vcpu->stat.sum_exits++;
762 run->exit_reason = KVM_EXIT_UNKNOWN;
763 run->ready_for_interrupt_injection = 1;
765 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | dar=0x%lx | dec=0x%x | msr=0x%lx\n",
766 exit_nr, vcpu->arch.pc, vcpu->arch.fault_dear,
767 kvmppc_get_dec(vcpu), vcpu->arch.msr);
768 #elif defined (EXIT_DEBUG_SIMPLE)
769 if ((exit_nr != 0x900) && (exit_nr != 0x500))
770 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | dar=0x%lx | msr=0x%lx\n",
771 exit_nr, vcpu->arch.pc, vcpu->arch.fault_dear,
776 case BOOK3S_INTERRUPT_INST_STORAGE:
777 vcpu->stat.pf_instruc++;
778 /* only care about PTEG not found errors, but leave NX alone */
779 if (vcpu->arch.shadow_srr1 & 0x40000000) {
780 r = kvmppc_handle_pagefault(run, vcpu, vcpu->arch.pc, exit_nr);
781 vcpu->stat.sp_instruc++;
782 } else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
783 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
785 * XXX If we do the dcbz hack we use the NX bit to flush&patch the page,
786 * so we can't use the NX bit inside the guest. Let's cross our fingers,
787 * that no guest that needs the dcbz hack does NX.
789 kvmppc_mmu_pte_flush(vcpu, vcpu->arch.pc, ~0xFFFULL);
791 vcpu->arch.msr |= vcpu->arch.shadow_srr1 & 0x58000000;
792 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
793 kvmppc_mmu_pte_flush(vcpu, vcpu->arch.pc, ~0xFFFULL);
797 case BOOK3S_INTERRUPT_DATA_STORAGE:
798 vcpu->stat.pf_storage++;
799 /* The only case we need to handle is missing shadow PTEs */
800 if (vcpu->arch.fault_dsisr & DSISR_NOHPTE) {
801 r = kvmppc_handle_pagefault(run, vcpu, vcpu->arch.fault_dear, exit_nr);
803 vcpu->arch.dear = vcpu->arch.fault_dear;
804 to_book3s(vcpu)->dsisr = vcpu->arch.fault_dsisr;
805 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
806 kvmppc_mmu_pte_flush(vcpu, vcpu->arch.dear, ~0xFFFULL);
810 case BOOK3S_INTERRUPT_DATA_SEGMENT:
811 if (kvmppc_mmu_map_segment(vcpu, vcpu->arch.fault_dear) < 0) {
812 vcpu->arch.dear = vcpu->arch.fault_dear;
813 kvmppc_book3s_queue_irqprio(vcpu,
814 BOOK3S_INTERRUPT_DATA_SEGMENT);
818 case BOOK3S_INTERRUPT_INST_SEGMENT:
819 if (kvmppc_mmu_map_segment(vcpu, vcpu->arch.pc) < 0) {
820 kvmppc_book3s_queue_irqprio(vcpu,
821 BOOK3S_INTERRUPT_INST_SEGMENT);
825 /* We're good on these - the host merely wanted to get our attention */
826 case BOOK3S_INTERRUPT_DECREMENTER:
827 vcpu->stat.dec_exits++;
830 case BOOK3S_INTERRUPT_EXTERNAL:
831 vcpu->stat.ext_intr_exits++;
834 case BOOK3S_INTERRUPT_PROGRAM:
836 enum emulation_result er;
840 flags = vcpu->arch.shadow_srr1 & 0x1f0000ull;
842 if (vcpu->arch.msr & MSR_PR) {
844 printk(KERN_INFO "Userspace triggered 0x700 exception at 0x%lx (0x%x)\n", vcpu->arch.pc, vcpu->arch.last_inst);
846 if ((vcpu->arch.last_inst & 0xff0007ff) !=
847 (INS_DCBZ & 0xfffffff7)) {
848 kvmppc_core_queue_program(vcpu, flags);
854 vcpu->stat.emulated_inst_exits++;
855 er = kvmppc_emulate_instruction(run, vcpu);
864 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
865 __func__, vcpu->arch.pc, vcpu->arch.last_inst);
866 kvmppc_core_queue_program(vcpu, flags);
869 case EMULATE_DO_MMIO:
870 run->exit_reason = KVM_EXIT_MMIO;
878 case BOOK3S_INTERRUPT_SYSCALL:
879 // XXX make user settable
880 if (vcpu->arch.osi_enabled &&
881 (((u32)kvmppc_get_gpr(vcpu, 3)) == OSI_SC_MAGIC_R3) &&
882 (((u32)kvmppc_get_gpr(vcpu, 4)) == OSI_SC_MAGIC_R4)) {
883 u64 *gprs = run->osi.gprs;
886 run->exit_reason = KVM_EXIT_OSI;
887 for (i = 0; i < 32; i++)
888 gprs[i] = kvmppc_get_gpr(vcpu, i);
889 vcpu->arch.osi_needed = 1;
893 vcpu->stat.syscall_exits++;
894 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
898 case BOOK3S_INTERRUPT_FP_UNAVAIL:
899 case BOOK3S_INTERRUPT_ALTIVEC:
900 case BOOK3S_INTERRUPT_VSX:
905 case BOOK3S_INTERRUPT_FP_UNAVAIL: ext_msr = MSR_FP; break;
906 case BOOK3S_INTERRUPT_ALTIVEC: ext_msr = MSR_VEC; break;
907 case BOOK3S_INTERRUPT_VSX: ext_msr = MSR_VSX; break;
910 switch (kvmppc_check_ext(vcpu, exit_nr)) {
912 /* everything ok - let's enable the ext */
913 r = kvmppc_handle_ext(vcpu, exit_nr, ext_msr);
916 /* we need to emulate this instruction */
917 goto program_interrupt;
920 /* nothing to worry about - go again */
925 case BOOK3S_INTERRUPT_ALIGNMENT:
926 if (kvmppc_read_inst(vcpu) == EMULATE_DONE) {
927 to_book3s(vcpu)->dsisr = kvmppc_alignment_dsisr(vcpu,
928 vcpu->arch.last_inst);
929 vcpu->arch.dear = kvmppc_alignment_dar(vcpu,
930 vcpu->arch.last_inst);
931 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
935 case BOOK3S_INTERRUPT_MACHINE_CHECK:
936 case BOOK3S_INTERRUPT_TRACE:
937 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
941 /* Ugh - bork here! What did we get? */
942 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | msr=0x%lx\n",
943 exit_nr, vcpu->arch.pc, vcpu->arch.shadow_srr1);
950 if (!(r & RESUME_HOST)) {
951 /* To avoid clobbering exit_reason, only check for signals if
952 * we aren't already exiting to userspace for some other
954 if (signal_pending(current)) {
956 printk(KERN_EMERG "KVM: Going back to host\n");
958 vcpu->stat.signal_exits++;
959 run->exit_reason = KVM_EXIT_INTR;
962 /* In case an interrupt came in that was triggered
963 * from userspace (like DEC), we need to check what
965 kvmppc_core_deliver_interrupts(vcpu);
970 printk(KERN_EMERG "KVM exit: vcpu=0x%p pc=0x%lx r=0x%x\n", vcpu, vcpu->arch.pc, r);
976 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
981 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
987 regs->pc = vcpu->arch.pc;
988 regs->cr = kvmppc_get_cr(vcpu);
989 regs->ctr = vcpu->arch.ctr;
990 regs->lr = vcpu->arch.lr;
991 regs->xer = kvmppc_get_xer(vcpu);
992 regs->msr = vcpu->arch.msr;
993 regs->srr0 = vcpu->arch.srr0;
994 regs->srr1 = vcpu->arch.srr1;
995 regs->pid = vcpu->arch.pid;
996 regs->sprg0 = vcpu->arch.sprg0;
997 regs->sprg1 = vcpu->arch.sprg1;
998 regs->sprg2 = vcpu->arch.sprg2;
999 regs->sprg3 = vcpu->arch.sprg3;
1000 regs->sprg5 = vcpu->arch.sprg4;
1001 regs->sprg6 = vcpu->arch.sprg5;
1002 regs->sprg7 = vcpu->arch.sprg6;
1004 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1005 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
1012 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1018 vcpu->arch.pc = regs->pc;
1019 kvmppc_set_cr(vcpu, regs->cr);
1020 vcpu->arch.ctr = regs->ctr;
1021 vcpu->arch.lr = regs->lr;
1022 kvmppc_set_xer(vcpu, regs->xer);
1023 kvmppc_set_msr(vcpu, regs->msr);
1024 vcpu->arch.srr0 = regs->srr0;
1025 vcpu->arch.srr1 = regs->srr1;
1026 vcpu->arch.sprg0 = regs->sprg0;
1027 vcpu->arch.sprg1 = regs->sprg1;
1028 vcpu->arch.sprg2 = regs->sprg2;
1029 vcpu->arch.sprg3 = regs->sprg3;
1030 vcpu->arch.sprg5 = regs->sprg4;
1031 vcpu->arch.sprg6 = regs->sprg5;
1032 vcpu->arch.sprg7 = regs->sprg6;
1034 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1035 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
1042 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1043 struct kvm_sregs *sregs)
1045 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
1048 sregs->pvr = vcpu->arch.pvr;
1050 sregs->u.s.sdr1 = to_book3s(vcpu)->sdr1;
1051 if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
1052 for (i = 0; i < 64; i++) {
1053 sregs->u.s.ppc64.slb[i].slbe = vcpu3s->slb[i].orige | i;
1054 sregs->u.s.ppc64.slb[i].slbv = vcpu3s->slb[i].origv;
1057 for (i = 0; i < 16; i++) {
1058 sregs->u.s.ppc32.sr[i] = vcpu3s->sr[i].raw;
1059 sregs->u.s.ppc32.sr[i] = vcpu3s->sr[i].raw;
1061 for (i = 0; i < 8; i++) {
1062 sregs->u.s.ppc32.ibat[i] = vcpu3s->ibat[i].raw;
1063 sregs->u.s.ppc32.dbat[i] = vcpu3s->dbat[i].raw;
1069 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1070 struct kvm_sregs *sregs)
1072 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
1075 kvmppc_set_pvr(vcpu, sregs->pvr);
1077 vcpu3s->sdr1 = sregs->u.s.sdr1;
1078 if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
1079 for (i = 0; i < 64; i++) {
1080 vcpu->arch.mmu.slbmte(vcpu, sregs->u.s.ppc64.slb[i].slbv,
1081 sregs->u.s.ppc64.slb[i].slbe);
1084 for (i = 0; i < 16; i++) {
1085 vcpu->arch.mmu.mtsrin(vcpu, i, sregs->u.s.ppc32.sr[i]);
1087 for (i = 0; i < 8; i++) {
1088 kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), false,
1089 (u32)sregs->u.s.ppc32.ibat[i]);
1090 kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), true,
1091 (u32)(sregs->u.s.ppc32.ibat[i] >> 32));
1092 kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), false,
1093 (u32)sregs->u.s.ppc32.dbat[i]);
1094 kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), true,
1095 (u32)(sregs->u.s.ppc32.dbat[i] >> 32));
1099 /* Flush the MMU after messing with the segments */
1100 kvmppc_mmu_pte_flush(vcpu, 0, 0);
1104 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1109 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1114 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1115 struct kvm_translation *tr)
1121 * Get (and clear) the dirty memory log for a memory slot.
1123 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
1124 struct kvm_dirty_log *log)
1126 struct kvm_memory_slot *memslot;
1127 struct kvm_vcpu *vcpu;
1133 mutex_lock(&kvm->slots_lock);
1135 r = kvm_get_dirty_log(kvm, log, &is_dirty);
1139 /* If nothing is dirty, don't bother messing with page tables. */
1141 memslot = &kvm->memslots->memslots[log->slot];
1143 ga = memslot->base_gfn << PAGE_SHIFT;
1144 ga_end = ga + (memslot->npages << PAGE_SHIFT);
1146 kvm_for_each_vcpu(n, vcpu, kvm)
1147 kvmppc_mmu_pte_pflush(vcpu, ga, ga_end);
1149 n = kvm_dirty_bitmap_bytes(memslot);
1150 memset(memslot->dirty_bitmap, 0, n);
1155 mutex_unlock(&kvm->slots_lock);
1159 int kvmppc_core_check_processor_compat(void)
1164 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
1166 struct kvmppc_vcpu_book3s *vcpu_book3s;
1167 struct kvm_vcpu *vcpu;
1170 vcpu_book3s = vmalloc(sizeof(struct kvmppc_vcpu_book3s));
1175 memset(vcpu_book3s, 0, sizeof(struct kvmppc_vcpu_book3s));
1177 vcpu = &vcpu_book3s->vcpu;
1178 err = kvm_vcpu_init(vcpu, kvm, id);
1182 vcpu->arch.host_retip = kvm_return_point;
1183 vcpu->arch.host_msr = mfmsr();
1184 /* default to book3s_64 (970fx) */
1185 vcpu->arch.pvr = 0x3C0301;
1186 kvmppc_set_pvr(vcpu, vcpu->arch.pvr);
1187 vcpu_book3s->slb_nr = 64;
1189 /* remember where some real-mode handlers are */
1190 vcpu->arch.trampoline_lowmem = kvmppc_trampoline_lowmem;
1191 vcpu->arch.trampoline_enter = kvmppc_trampoline_enter;
1192 vcpu->arch.highmem_handler = (ulong)kvmppc_handler_highmem;
1193 vcpu->arch.rmcall = *(ulong*)kvmppc_rmcall;
1195 vcpu->arch.shadow_msr = MSR_USER64;
1197 err = __init_new_context();
1200 vcpu_book3s->context_id = err;
1202 vcpu_book3s->vsid_max = ((vcpu_book3s->context_id + 1) << USER_ESID_BITS) - 1;
1203 vcpu_book3s->vsid_first = vcpu_book3s->context_id << USER_ESID_BITS;
1204 vcpu_book3s->vsid_next = vcpu_book3s->vsid_first;
1211 return ERR_PTR(err);
1214 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
1216 struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
1218 __destroy_context(vcpu_book3s->context_id);
1219 kvm_vcpu_uninit(vcpu);
1223 extern int __kvmppc_vcpu_entry(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
1224 int __kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
1227 struct thread_struct ext_bkp;
1228 #ifdef CONFIG_ALTIVEC
1229 bool save_vec = current->thread.used_vr;
1232 bool save_vsx = current->thread.used_vsr;
1236 /* No need to go into the guest when all we do is going out */
1237 if (signal_pending(current)) {
1238 kvm_run->exit_reason = KVM_EXIT_INTR;
1242 /* Save FPU state in stack */
1243 if (current->thread.regs->msr & MSR_FP)
1244 giveup_fpu(current);
1245 memcpy(ext_bkp.fpr, current->thread.fpr, sizeof(current->thread.fpr));
1246 ext_bkp.fpscr = current->thread.fpscr;
1247 ext_bkp.fpexc_mode = current->thread.fpexc_mode;
1249 #ifdef CONFIG_ALTIVEC
1250 /* Save Altivec state in stack */
1252 if (current->thread.regs->msr & MSR_VEC)
1253 giveup_altivec(current);
1254 memcpy(ext_bkp.vr, current->thread.vr, sizeof(ext_bkp.vr));
1255 ext_bkp.vscr = current->thread.vscr;
1256 ext_bkp.vrsave = current->thread.vrsave;
1258 ext_bkp.used_vr = current->thread.used_vr;
1262 /* Save VSX state in stack */
1263 if (save_vsx && (current->thread.regs->msr & MSR_VSX))
1264 __giveup_vsx(current);
1265 ext_bkp.used_vsr = current->thread.used_vsr;
1268 /* Remember the MSR with disabled extensions */
1269 ext_msr = current->thread.regs->msr;
1271 /* XXX we get called with irq disabled - change that! */
1274 /* Preload FPU if it's enabled */
1275 if (vcpu->arch.msr & MSR_FP)
1276 kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
1278 ret = __kvmppc_vcpu_entry(kvm_run, vcpu);
1280 local_irq_disable();
1282 current->thread.regs->msr = ext_msr;
1284 /* Make sure we save the guest FPU/Altivec/VSX state */
1285 kvmppc_giveup_ext(vcpu, MSR_FP);
1286 kvmppc_giveup_ext(vcpu, MSR_VEC);
1287 kvmppc_giveup_ext(vcpu, MSR_VSX);
1289 /* Restore FPU state from stack */
1290 memcpy(current->thread.fpr, ext_bkp.fpr, sizeof(ext_bkp.fpr));
1291 current->thread.fpscr = ext_bkp.fpscr;
1292 current->thread.fpexc_mode = ext_bkp.fpexc_mode;
1294 #ifdef CONFIG_ALTIVEC
1295 /* Restore Altivec state from stack */
1296 if (save_vec && current->thread.used_vr) {
1297 memcpy(current->thread.vr, ext_bkp.vr, sizeof(ext_bkp.vr));
1298 current->thread.vscr = ext_bkp.vscr;
1299 current->thread.vrsave= ext_bkp.vrsave;
1301 current->thread.used_vr = ext_bkp.used_vr;
1305 current->thread.used_vsr = ext_bkp.used_vsr;
1311 static int kvmppc_book3s_init(void)
1313 return kvm_init(NULL, sizeof(struct kvmppc_vcpu_book3s), THIS_MODULE);
1316 static void kvmppc_book3s_exit(void)
1321 module_init(kvmppc_book3s_init);
1322 module_exit(kvmppc_book3s_exit);