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>
19 #include <linux/export.h>
20 #include <linux/slab.h>
23 #include <asm/cputable.h>
24 #include <asm/cacheflush.h>
25 #include <asm/tlbflush.h>
26 #include <asm/uaccess.h>
28 #include <asm/kvm_ppc.h>
29 #include <asm/kvm_book3s.h>
30 #include <asm/mmu_context.h>
32 #include <linux/gfp.h>
33 #include <linux/sched.h>
34 #include <linux/vmalloc.h>
35 #include <linux/highmem.h>
39 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
41 /* #define EXIT_DEBUG */
43 struct kvm_stats_debugfs_item debugfs_entries[] = {
44 { "exits", VCPU_STAT(sum_exits) },
45 { "mmio", VCPU_STAT(mmio_exits) },
46 { "sig", VCPU_STAT(signal_exits) },
47 { "sysc", VCPU_STAT(syscall_exits) },
48 { "inst_emu", VCPU_STAT(emulated_inst_exits) },
49 { "dec", VCPU_STAT(dec_exits) },
50 { "ext_intr", VCPU_STAT(ext_intr_exits) },
51 { "queue_intr", VCPU_STAT(queue_intr) },
52 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
53 { "pf_storage", VCPU_STAT(pf_storage) },
54 { "sp_storage", VCPU_STAT(sp_storage) },
55 { "pf_instruc", VCPU_STAT(pf_instruc) },
56 { "sp_instruc", VCPU_STAT(sp_instruc) },
57 { "ld", VCPU_STAT(ld) },
58 { "ld_slow", VCPU_STAT(ld_slow) },
59 { "st", VCPU_STAT(st) },
60 { "st_slow", VCPU_STAT(st_slow) },
64 void kvmppc_core_load_host_debugstate(struct kvm_vcpu *vcpu)
68 void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu)
72 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
74 vcpu->arch.shared->srr0 = kvmppc_get_pc(vcpu);
75 vcpu->arch.shared->srr1 = vcpu->arch.shared->msr | flags;
76 kvmppc_set_pc(vcpu, kvmppc_interrupt_offset(vcpu) + vec);
77 vcpu->arch.mmu.reset_msr(vcpu);
80 static int kvmppc_book3s_vec2irqprio(unsigned int vec)
85 case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET; break;
86 case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK; break;
87 case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE; break;
88 case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT; break;
89 case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE; break;
90 case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT; break;
91 case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL; break;
92 case 0x501: prio = BOOK3S_IRQPRIO_EXTERNAL_LEVEL; break;
93 case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT; break;
94 case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM; break;
95 case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL; break;
96 case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER; break;
97 case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL; break;
98 case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG; break;
99 case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC; break;
100 case 0xf40: prio = BOOK3S_IRQPRIO_VSX; break;
101 default: prio = BOOK3S_IRQPRIO_MAX; break;
107 static void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
110 unsigned long old_pending = vcpu->arch.pending_exceptions;
112 clear_bit(kvmppc_book3s_vec2irqprio(vec),
113 &vcpu->arch.pending_exceptions);
115 kvmppc_update_int_pending(vcpu, vcpu->arch.pending_exceptions,
119 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
121 vcpu->stat.queue_intr++;
123 set_bit(kvmppc_book3s_vec2irqprio(vec),
124 &vcpu->arch.pending_exceptions);
126 printk(KERN_INFO "Queueing interrupt %x\n", vec);
131 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
133 /* might as well deliver this straight away */
134 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_PROGRAM, flags);
137 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
139 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
142 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
144 return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
147 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
149 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
152 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
153 struct kvm_interrupt *irq)
155 unsigned int vec = BOOK3S_INTERRUPT_EXTERNAL;
157 if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
158 vec = BOOK3S_INTERRUPT_EXTERNAL_LEVEL;
160 kvmppc_book3s_queue_irqprio(vcpu, vec);
163 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu,
164 struct kvm_interrupt *irq)
166 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
167 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL_LEVEL);
170 int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority)
174 bool crit = kvmppc_critical_section(vcpu);
177 case BOOK3S_IRQPRIO_DECREMENTER:
178 deliver = (vcpu->arch.shared->msr & MSR_EE) && !crit;
179 vec = BOOK3S_INTERRUPT_DECREMENTER;
181 case BOOK3S_IRQPRIO_EXTERNAL:
182 case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
183 deliver = (vcpu->arch.shared->msr & MSR_EE) && !crit;
184 vec = BOOK3S_INTERRUPT_EXTERNAL;
186 case BOOK3S_IRQPRIO_SYSTEM_RESET:
187 vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
189 case BOOK3S_IRQPRIO_MACHINE_CHECK:
190 vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
192 case BOOK3S_IRQPRIO_DATA_STORAGE:
193 vec = BOOK3S_INTERRUPT_DATA_STORAGE;
195 case BOOK3S_IRQPRIO_INST_STORAGE:
196 vec = BOOK3S_INTERRUPT_INST_STORAGE;
198 case BOOK3S_IRQPRIO_DATA_SEGMENT:
199 vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
201 case BOOK3S_IRQPRIO_INST_SEGMENT:
202 vec = BOOK3S_INTERRUPT_INST_SEGMENT;
204 case BOOK3S_IRQPRIO_ALIGNMENT:
205 vec = BOOK3S_INTERRUPT_ALIGNMENT;
207 case BOOK3S_IRQPRIO_PROGRAM:
208 vec = BOOK3S_INTERRUPT_PROGRAM;
210 case BOOK3S_IRQPRIO_VSX:
211 vec = BOOK3S_INTERRUPT_VSX;
213 case BOOK3S_IRQPRIO_ALTIVEC:
214 vec = BOOK3S_INTERRUPT_ALTIVEC;
216 case BOOK3S_IRQPRIO_FP_UNAVAIL:
217 vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
219 case BOOK3S_IRQPRIO_SYSCALL:
220 vec = BOOK3S_INTERRUPT_SYSCALL;
222 case BOOK3S_IRQPRIO_DEBUG:
223 vec = BOOK3S_INTERRUPT_TRACE;
225 case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
226 vec = BOOK3S_INTERRUPT_PERFMON;
230 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
235 printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
239 kvmppc_inject_interrupt(vcpu, vec, 0);
245 * This function determines if an irqprio should be cleared once issued.
247 static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority)
250 case BOOK3S_IRQPRIO_DECREMENTER:
251 /* DEC interrupts get cleared by mtdec */
253 case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
254 /* External interrupts get cleared by userspace */
261 void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
263 unsigned long *pending = &vcpu->arch.pending_exceptions;
264 unsigned long old_pending = vcpu->arch.pending_exceptions;
265 unsigned int priority;
268 if (vcpu->arch.pending_exceptions)
269 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
271 priority = __ffs(*pending);
272 while (priority < BOOK3S_IRQPRIO_MAX) {
273 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
274 clear_irqprio(vcpu, priority)) {
275 clear_bit(priority, &vcpu->arch.pending_exceptions);
279 priority = find_next_bit(pending,
280 BITS_PER_BYTE * sizeof(*pending),
284 /* Tell the guest about our interrupt status */
285 kvmppc_update_int_pending(vcpu, *pending, old_pending);
288 pfn_t kvmppc_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn)
290 ulong mp_pa = vcpu->arch.magic_page_pa;
292 /* Magic page override */
293 if (unlikely(mp_pa) &&
294 unlikely(((gfn << PAGE_SHIFT) & KVM_PAM) ==
295 ((mp_pa & PAGE_MASK) & KVM_PAM))) {
296 ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
299 pfn = (pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT;
300 get_page(pfn_to_page(pfn));
304 return gfn_to_pfn(vcpu->kvm, gfn);
307 static int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, bool data,
308 struct kvmppc_pte *pte)
310 int relocated = (vcpu->arch.shared->msr & (data ? MSR_DR : MSR_IR));
314 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data);
317 pte->raddr = eaddr & KVM_PAM;
318 pte->vpage = VSID_REAL | eaddr >> 12;
319 pte->may_read = true;
320 pte->may_write = true;
321 pte->may_execute = true;
328 static hva_t kvmppc_bad_hva(void)
333 static hva_t kvmppc_pte_to_hva(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte,
338 if (read && !pte->may_read)
341 if (!read && !pte->may_write)
344 hpage = gfn_to_hva(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
345 if (kvm_is_error_hva(hpage))
348 return hpage | (pte->raddr & ~PAGE_MASK);
350 return kvmppc_bad_hva();
353 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
356 struct kvmppc_pte pte;
360 if (kvmppc_xlate(vcpu, *eaddr, data, &pte))
368 if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
369 return EMULATE_DO_MMIO;
374 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
377 struct kvmppc_pte pte;
382 if (kvmppc_xlate(vcpu, *eaddr, data, &pte))
387 hva = kvmppc_pte_to_hva(vcpu, &pte, true);
388 if (kvm_is_error_hva(hva))
391 if (copy_from_user(ptr, (void __user *)hva, size)) {
392 printk(KERN_INFO "kvmppc_ld at 0x%lx failed\n", hva);
401 return EMULATE_DO_MMIO;
404 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
409 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
413 regs->pc = kvmppc_get_pc(vcpu);
414 regs->cr = kvmppc_get_cr(vcpu);
415 regs->ctr = kvmppc_get_ctr(vcpu);
416 regs->lr = kvmppc_get_lr(vcpu);
417 regs->xer = kvmppc_get_xer(vcpu);
418 regs->msr = vcpu->arch.shared->msr;
419 regs->srr0 = vcpu->arch.shared->srr0;
420 regs->srr1 = vcpu->arch.shared->srr1;
421 regs->pid = vcpu->arch.pid;
422 regs->sprg0 = vcpu->arch.shared->sprg0;
423 regs->sprg1 = vcpu->arch.shared->sprg1;
424 regs->sprg2 = vcpu->arch.shared->sprg2;
425 regs->sprg3 = vcpu->arch.shared->sprg3;
426 regs->sprg4 = vcpu->arch.sprg4;
427 regs->sprg5 = vcpu->arch.sprg5;
428 regs->sprg6 = vcpu->arch.sprg6;
429 regs->sprg7 = vcpu->arch.sprg7;
431 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
432 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
437 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
441 kvmppc_set_pc(vcpu, regs->pc);
442 kvmppc_set_cr(vcpu, regs->cr);
443 kvmppc_set_ctr(vcpu, regs->ctr);
444 kvmppc_set_lr(vcpu, regs->lr);
445 kvmppc_set_xer(vcpu, regs->xer);
446 kvmppc_set_msr(vcpu, regs->msr);
447 vcpu->arch.shared->srr0 = regs->srr0;
448 vcpu->arch.shared->srr1 = regs->srr1;
449 vcpu->arch.shared->sprg0 = regs->sprg0;
450 vcpu->arch.shared->sprg1 = regs->sprg1;
451 vcpu->arch.shared->sprg2 = regs->sprg2;
452 vcpu->arch.shared->sprg3 = regs->sprg3;
453 vcpu->arch.sprg4 = regs->sprg4;
454 vcpu->arch.sprg5 = regs->sprg5;
455 vcpu->arch.sprg6 = regs->sprg6;
456 vcpu->arch.sprg7 = regs->sprg7;
458 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
459 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
464 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
469 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
474 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
475 struct kvm_translation *tr)
481 * Get (and clear) the dirty memory log for a memory slot.
483 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
484 struct kvm_dirty_log *log)
486 struct kvm_memory_slot *memslot;
487 struct kvm_vcpu *vcpu;
493 mutex_lock(&kvm->slots_lock);
495 r = kvm_get_dirty_log(kvm, log, &is_dirty);
499 /* If nothing is dirty, don't bother messing with page tables. */
501 memslot = id_to_memslot(kvm->memslots, log->slot);
503 ga = memslot->base_gfn << PAGE_SHIFT;
504 ga_end = ga + (memslot->npages << PAGE_SHIFT);
506 kvm_for_each_vcpu(n, vcpu, kvm)
507 kvmppc_mmu_pte_pflush(vcpu, ga, ga_end);
509 n = kvm_dirty_bitmap_bytes(memslot);
510 memset(memslot->dirty_bitmap, 0, n);
515 mutex_unlock(&kvm->slots_lock);