2 * Kernel-based Virtual Machine driver for Linux
4 * derived from drivers/kvm/kvm_main.c
6 * Copyright (C) 2006 Qumranet, Inc.
9 * Avi Kivity <avi@qumranet.com>
10 * Yaniv Kamay <yaniv@qumranet.com>
12 * This work is licensed under the terms of the GNU GPL, version 2. See
13 * the COPYING file in the top-level directory.
17 #include <linux/kvm_host.h>
18 #include "segment_descriptor.h"
22 #include <linux/kvm.h>
24 #include <linux/vmalloc.h>
25 #include <linux/module.h>
26 #include <linux/mman.h>
27 #include <linux/highmem.h>
29 #include <asm/uaccess.h>
32 #define MAX_IO_MSRS 256
33 #define CR0_RESERVED_BITS \
34 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
35 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
36 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
37 #define CR4_RESERVED_BITS \
38 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
39 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \
40 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \
41 | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
43 #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
44 #define EFER_RESERVED_BITS 0xfffffffffffff2fe
46 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
47 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
49 struct kvm_x86_ops *kvm_x86_ops;
51 struct kvm_stats_debugfs_item debugfs_entries[] = {
52 { "pf_fixed", VCPU_STAT(pf_fixed) },
53 { "pf_guest", VCPU_STAT(pf_guest) },
54 { "tlb_flush", VCPU_STAT(tlb_flush) },
55 { "invlpg", VCPU_STAT(invlpg) },
56 { "exits", VCPU_STAT(exits) },
57 { "io_exits", VCPU_STAT(io_exits) },
58 { "mmio_exits", VCPU_STAT(mmio_exits) },
59 { "signal_exits", VCPU_STAT(signal_exits) },
60 { "irq_window", VCPU_STAT(irq_window_exits) },
61 { "halt_exits", VCPU_STAT(halt_exits) },
62 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
63 { "request_irq", VCPU_STAT(request_irq_exits) },
64 { "irq_exits", VCPU_STAT(irq_exits) },
65 { "host_state_reload", VCPU_STAT(host_state_reload) },
66 { "efer_reload", VCPU_STAT(efer_reload) },
67 { "fpu_reload", VCPU_STAT(fpu_reload) },
68 { "insn_emulation", VCPU_STAT(insn_emulation) },
69 { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) },
70 { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) },
71 { "mmu_pte_write", VM_STAT(mmu_pte_write) },
72 { "mmu_pte_updated", VM_STAT(mmu_pte_updated) },
73 { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) },
74 { "mmu_flooded", VM_STAT(mmu_flooded) },
75 { "mmu_recycled", VM_STAT(mmu_recycled) },
76 { "mmu_cache_miss", VM_STAT(mmu_cache_miss) },
77 { "remote_tlb_flush", VM_STAT(remote_tlb_flush) },
82 unsigned long segment_base(u16 selector)
84 struct descriptor_table gdt;
85 struct segment_descriptor *d;
86 unsigned long table_base;
92 asm("sgdt %0" : "=m"(gdt));
93 table_base = gdt.base;
95 if (selector & 4) { /* from ldt */
98 asm("sldt %0" : "=g"(ldt_selector));
99 table_base = segment_base(ldt_selector);
101 d = (struct segment_descriptor *)(table_base + (selector & ~7));
102 v = d->base_low | ((unsigned long)d->base_mid << 16) |
103 ((unsigned long)d->base_high << 24);
105 if (d->system == 0 && (d->type == 2 || d->type == 9 || d->type == 11))
106 v |= ((unsigned long) \
107 ((struct segment_descriptor_64 *)d)->base_higher) << 32;
111 EXPORT_SYMBOL_GPL(segment_base);
113 u64 kvm_get_apic_base(struct kvm_vcpu *vcpu)
115 if (irqchip_in_kernel(vcpu->kvm))
116 return vcpu->arch.apic_base;
118 return vcpu->arch.apic_base;
120 EXPORT_SYMBOL_GPL(kvm_get_apic_base);
122 void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data)
124 /* TODO: reserve bits check */
125 if (irqchip_in_kernel(vcpu->kvm))
126 kvm_lapic_set_base(vcpu, data);
128 vcpu->arch.apic_base = data;
130 EXPORT_SYMBOL_GPL(kvm_set_apic_base);
132 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr)
134 WARN_ON(vcpu->arch.exception.pending);
135 vcpu->arch.exception.pending = true;
136 vcpu->arch.exception.has_error_code = false;
137 vcpu->arch.exception.nr = nr;
139 EXPORT_SYMBOL_GPL(kvm_queue_exception);
141 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr,
144 ++vcpu->stat.pf_guest;
145 if (vcpu->arch.exception.pending && vcpu->arch.exception.nr == PF_VECTOR) {
146 printk(KERN_DEBUG "kvm: inject_page_fault:"
147 " double fault 0x%lx\n", addr);
148 vcpu->arch.exception.nr = DF_VECTOR;
149 vcpu->arch.exception.error_code = 0;
152 vcpu->arch.cr2 = addr;
153 kvm_queue_exception_e(vcpu, PF_VECTOR, error_code);
156 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code)
158 WARN_ON(vcpu->arch.exception.pending);
159 vcpu->arch.exception.pending = true;
160 vcpu->arch.exception.has_error_code = true;
161 vcpu->arch.exception.nr = nr;
162 vcpu->arch.exception.error_code = error_code;
164 EXPORT_SYMBOL_GPL(kvm_queue_exception_e);
166 static void __queue_exception(struct kvm_vcpu *vcpu)
168 kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr,
169 vcpu->arch.exception.has_error_code,
170 vcpu->arch.exception.error_code);
174 * Load the pae pdptrs. Return true is they are all valid.
176 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3)
178 gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT;
179 unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2;
182 u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)];
184 mutex_lock(&vcpu->kvm->lock);
185 ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte,
186 offset * sizeof(u64), sizeof(pdpte));
191 for (i = 0; i < ARRAY_SIZE(pdpte); ++i) {
192 if ((pdpte[i] & 1) && (pdpte[i] & 0xfffffff0000001e6ull)) {
199 memcpy(vcpu->arch.pdptrs, pdpte, sizeof(vcpu->arch.pdptrs));
201 mutex_unlock(&vcpu->kvm->lock);
206 static bool pdptrs_changed(struct kvm_vcpu *vcpu)
208 u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)];
212 if (is_long_mode(vcpu) || !is_pae(vcpu))
215 mutex_lock(&vcpu->kvm->lock);
216 r = kvm_read_guest(vcpu->kvm, vcpu->arch.cr3 & ~31u, pdpte, sizeof(pdpte));
219 changed = memcmp(pdpte, vcpu->arch.pdptrs, sizeof(pdpte)) != 0;
221 mutex_unlock(&vcpu->kvm->lock);
226 void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
228 if (cr0 & CR0_RESERVED_BITS) {
229 printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
230 cr0, vcpu->arch.cr0);
231 kvm_inject_gp(vcpu, 0);
235 if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) {
236 printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n");
237 kvm_inject_gp(vcpu, 0);
241 if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) {
242 printk(KERN_DEBUG "set_cr0: #GP, set PG flag "
243 "and a clear PE flag\n");
244 kvm_inject_gp(vcpu, 0);
248 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
250 if ((vcpu->arch.shadow_efer & EFER_LME)) {
254 printk(KERN_DEBUG "set_cr0: #GP, start paging "
255 "in long mode while PAE is disabled\n");
256 kvm_inject_gp(vcpu, 0);
259 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
261 printk(KERN_DEBUG "set_cr0: #GP, start paging "
262 "in long mode while CS.L == 1\n");
263 kvm_inject_gp(vcpu, 0);
269 if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.cr3)) {
270 printk(KERN_DEBUG "set_cr0: #GP, pdptrs "
272 kvm_inject_gp(vcpu, 0);
278 kvm_x86_ops->set_cr0(vcpu, cr0);
279 vcpu->arch.cr0 = cr0;
281 mutex_lock(&vcpu->kvm->lock);
282 kvm_mmu_reset_context(vcpu);
283 mutex_unlock(&vcpu->kvm->lock);
286 EXPORT_SYMBOL_GPL(set_cr0);
288 void lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
290 set_cr0(vcpu, (vcpu->arch.cr0 & ~0x0ful) | (msw & 0x0f));
292 EXPORT_SYMBOL_GPL(lmsw);
294 void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
296 if (cr4 & CR4_RESERVED_BITS) {
297 printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n");
298 kvm_inject_gp(vcpu, 0);
302 if (is_long_mode(vcpu)) {
303 if (!(cr4 & X86_CR4_PAE)) {
304 printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while "
306 kvm_inject_gp(vcpu, 0);
309 } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & X86_CR4_PAE)
310 && !load_pdptrs(vcpu, vcpu->arch.cr3)) {
311 printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n");
312 kvm_inject_gp(vcpu, 0);
316 if (cr4 & X86_CR4_VMXE) {
317 printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n");
318 kvm_inject_gp(vcpu, 0);
321 kvm_x86_ops->set_cr4(vcpu, cr4);
322 vcpu->arch.cr4 = cr4;
323 mutex_lock(&vcpu->kvm->lock);
324 kvm_mmu_reset_context(vcpu);
325 mutex_unlock(&vcpu->kvm->lock);
327 EXPORT_SYMBOL_GPL(set_cr4);
329 void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
331 if (cr3 == vcpu->arch.cr3 && !pdptrs_changed(vcpu)) {
332 kvm_mmu_flush_tlb(vcpu);
336 if (is_long_mode(vcpu)) {
337 if (cr3 & CR3_L_MODE_RESERVED_BITS) {
338 printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n");
339 kvm_inject_gp(vcpu, 0);
344 if (cr3 & CR3_PAE_RESERVED_BITS) {
346 "set_cr3: #GP, reserved bits\n");
347 kvm_inject_gp(vcpu, 0);
350 if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) {
351 printk(KERN_DEBUG "set_cr3: #GP, pdptrs "
353 kvm_inject_gp(vcpu, 0);
358 * We don't check reserved bits in nonpae mode, because
359 * this isn't enforced, and VMware depends on this.
363 mutex_lock(&vcpu->kvm->lock);
365 * Does the new cr3 value map to physical memory? (Note, we
366 * catch an invalid cr3 even in real-mode, because it would
367 * cause trouble later on when we turn on paging anyway.)
369 * A real CPU would silently accept an invalid cr3 and would
370 * attempt to use it - with largely undefined (and often hard
371 * to debug) behavior on the guest side.
373 if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT)))
374 kvm_inject_gp(vcpu, 0);
376 vcpu->arch.cr3 = cr3;
377 vcpu->arch.mmu.new_cr3(vcpu);
379 mutex_unlock(&vcpu->kvm->lock);
381 EXPORT_SYMBOL_GPL(set_cr3);
383 void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
385 if (cr8 & CR8_RESERVED_BITS) {
386 printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8);
387 kvm_inject_gp(vcpu, 0);
390 if (irqchip_in_kernel(vcpu->kvm))
391 kvm_lapic_set_tpr(vcpu, cr8);
393 vcpu->arch.cr8 = cr8;
395 EXPORT_SYMBOL_GPL(set_cr8);
397 unsigned long get_cr8(struct kvm_vcpu *vcpu)
399 if (irqchip_in_kernel(vcpu->kvm))
400 return kvm_lapic_get_cr8(vcpu);
402 return vcpu->arch.cr8;
404 EXPORT_SYMBOL_GPL(get_cr8);
407 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
408 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
410 * This list is modified at module load time to reflect the
411 * capabilities of the host cpu.
413 static u32 msrs_to_save[] = {
414 MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
417 MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR,
419 MSR_IA32_TIME_STAMP_COUNTER,
422 static unsigned num_msrs_to_save;
424 static u32 emulated_msrs[] = {
425 MSR_IA32_MISC_ENABLE,
430 static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
432 if (efer & EFER_RESERVED_BITS) {
433 printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n",
435 kvm_inject_gp(vcpu, 0);
440 && (vcpu->arch.shadow_efer & EFER_LME) != (efer & EFER_LME)) {
441 printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n");
442 kvm_inject_gp(vcpu, 0);
446 kvm_x86_ops->set_efer(vcpu, efer);
449 efer |= vcpu->arch.shadow_efer & EFER_LMA;
451 vcpu->arch.shadow_efer = efer;
457 * Writes msr value into into the appropriate "register".
458 * Returns 0 on success, non-0 otherwise.
459 * Assumes vcpu_load() was already called.
461 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
463 return kvm_x86_ops->set_msr(vcpu, msr_index, data);
467 * Adapt set_msr() to msr_io()'s calling convention
469 static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
471 return kvm_set_msr(vcpu, index, *data);
475 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
480 set_efer(vcpu, data);
483 case MSR_IA32_MC0_STATUS:
484 pr_unimpl(vcpu, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n",
487 case MSR_IA32_MCG_STATUS:
488 pr_unimpl(vcpu, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n",
491 case MSR_IA32_UCODE_REV:
492 case MSR_IA32_UCODE_WRITE:
493 case 0x200 ... 0x2ff: /* MTRRs */
495 case MSR_IA32_APICBASE:
496 kvm_set_apic_base(vcpu, data);
498 case MSR_IA32_MISC_ENABLE:
499 vcpu->arch.ia32_misc_enable_msr = data;
502 pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", msr, data);
507 EXPORT_SYMBOL_GPL(kvm_set_msr_common);
511 * Reads an msr value (of 'msr_index') into 'pdata'.
512 * Returns 0 on success, non-0 otherwise.
513 * Assumes vcpu_load() was already called.
515 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
517 return kvm_x86_ops->get_msr(vcpu, msr_index, pdata);
520 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
525 case 0xc0010010: /* SYSCFG */
526 case 0xc0010015: /* HWCR */
527 case MSR_IA32_PLATFORM_ID:
528 case MSR_IA32_P5_MC_ADDR:
529 case MSR_IA32_P5_MC_TYPE:
530 case MSR_IA32_MC0_CTL:
531 case MSR_IA32_MCG_STATUS:
532 case MSR_IA32_MCG_CAP:
533 case MSR_IA32_MC0_MISC:
534 case MSR_IA32_MC0_MISC+4:
535 case MSR_IA32_MC0_MISC+8:
536 case MSR_IA32_MC0_MISC+12:
537 case MSR_IA32_MC0_MISC+16:
538 case MSR_IA32_UCODE_REV:
539 case MSR_IA32_PERF_STATUS:
540 case MSR_IA32_EBL_CR_POWERON:
543 case 0x200 ... 0x2ff:
546 case 0xcd: /* fsb frequency */
549 case MSR_IA32_APICBASE:
550 data = kvm_get_apic_base(vcpu);
552 case MSR_IA32_MISC_ENABLE:
553 data = vcpu->arch.ia32_misc_enable_msr;
557 data = vcpu->arch.shadow_efer;
561 pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr);
567 EXPORT_SYMBOL_GPL(kvm_get_msr_common);
570 * Read or write a bunch of msrs. All parameters are kernel addresses.
572 * @return number of msrs set successfully.
574 static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs,
575 struct kvm_msr_entry *entries,
576 int (*do_msr)(struct kvm_vcpu *vcpu,
577 unsigned index, u64 *data))
583 for (i = 0; i < msrs->nmsrs; ++i)
584 if (do_msr(vcpu, entries[i].index, &entries[i].data))
593 * Read or write a bunch of msrs. Parameters are user addresses.
595 * @return number of msrs set successfully.
597 static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs,
598 int (*do_msr)(struct kvm_vcpu *vcpu,
599 unsigned index, u64 *data),
602 struct kvm_msrs msrs;
603 struct kvm_msr_entry *entries;
608 if (copy_from_user(&msrs, user_msrs, sizeof msrs))
612 if (msrs.nmsrs >= MAX_IO_MSRS)
616 size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;
617 entries = vmalloc(size);
622 if (copy_from_user(entries, user_msrs->entries, size))
625 r = n = __msr_io(vcpu, &msrs, entries, do_msr);
630 if (writeback && copy_to_user(user_msrs->entries, entries, size))
642 * Make sure that a cpu that is being hot-unplugged does not have any vcpus
645 void decache_vcpus_on_cpu(int cpu)
648 struct kvm_vcpu *vcpu;
651 spin_lock(&kvm_lock);
652 list_for_each_entry(vm, &vm_list, vm_list)
653 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
658 * If the vcpu is locked, then it is running on some
659 * other cpu and therefore it is not cached on the
662 * If it's not locked, check the last cpu it executed
665 if (mutex_trylock(&vcpu->mutex)) {
666 if (vcpu->cpu == cpu) {
667 kvm_x86_ops->vcpu_decache(vcpu);
670 mutex_unlock(&vcpu->mutex);
673 spin_unlock(&kvm_lock);
676 int kvm_dev_ioctl_check_extension(long ext)
681 case KVM_CAP_IRQCHIP:
683 case KVM_CAP_MMU_SHADOW_CACHE_CONTROL:
684 case KVM_CAP_USER_MEMORY:
685 case KVM_CAP_SET_TSS_ADDR:
686 case KVM_CAP_EXT_CPUID:
697 long kvm_arch_dev_ioctl(struct file *filp,
698 unsigned int ioctl, unsigned long arg)
700 void __user *argp = (void __user *)arg;
704 case KVM_GET_MSR_INDEX_LIST: {
705 struct kvm_msr_list __user *user_msr_list = argp;
706 struct kvm_msr_list msr_list;
710 if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list))
713 msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs);
714 if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list))
717 if (n < num_msrs_to_save)
720 if (copy_to_user(user_msr_list->indices, &msrs_to_save,
721 num_msrs_to_save * sizeof(u32)))
723 if (copy_to_user(user_msr_list->indices
724 + num_msrs_to_save * sizeof(u32),
726 ARRAY_SIZE(emulated_msrs) * sizeof(u32)))
738 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
740 kvm_x86_ops->vcpu_load(vcpu, cpu);
743 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
745 kvm_x86_ops->vcpu_put(vcpu);
746 kvm_put_guest_fpu(vcpu);
749 static int is_efer_nx(void)
753 rdmsrl(MSR_EFER, efer);
754 return efer & EFER_NX;
757 static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu)
760 struct kvm_cpuid_entry2 *e, *entry;
763 for (i = 0; i < vcpu->arch.cpuid_nent; ++i) {
764 e = &vcpu->arch.cpuid_entries[i];
765 if (e->function == 0x80000001) {
770 if (entry && (entry->edx & (1 << 20)) && !is_efer_nx()) {
771 entry->edx &= ~(1 << 20);
772 printk(KERN_INFO "kvm: guest NX capability removed\n");
776 /* when an old userspace process fills a new kernel module */
777 static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
778 struct kvm_cpuid *cpuid,
779 struct kvm_cpuid_entry __user *entries)
782 struct kvm_cpuid_entry *cpuid_entries;
785 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
788 cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry) * cpuid->nent);
792 if (copy_from_user(cpuid_entries, entries,
793 cpuid->nent * sizeof(struct kvm_cpuid_entry)))
795 for (i = 0; i < cpuid->nent; i++) {
796 vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function;
797 vcpu->arch.cpuid_entries[i].eax = cpuid_entries[i].eax;
798 vcpu->arch.cpuid_entries[i].ebx = cpuid_entries[i].ebx;
799 vcpu->arch.cpuid_entries[i].ecx = cpuid_entries[i].ecx;
800 vcpu->arch.cpuid_entries[i].edx = cpuid_entries[i].edx;
801 vcpu->arch.cpuid_entries[i].index = 0;
802 vcpu->arch.cpuid_entries[i].flags = 0;
803 vcpu->arch.cpuid_entries[i].padding[0] = 0;
804 vcpu->arch.cpuid_entries[i].padding[1] = 0;
805 vcpu->arch.cpuid_entries[i].padding[2] = 0;
807 vcpu->arch.cpuid_nent = cpuid->nent;
808 cpuid_fix_nx_cap(vcpu);
812 vfree(cpuid_entries);
817 static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu,
818 struct kvm_cpuid2 *cpuid,
819 struct kvm_cpuid_entry2 __user *entries)
824 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
827 if (copy_from_user(&vcpu->arch.cpuid_entries, entries,
828 cpuid->nent * sizeof(struct kvm_cpuid_entry2)))
830 vcpu->arch.cpuid_nent = cpuid->nent;
837 static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu,
838 struct kvm_cpuid2 *cpuid,
839 struct kvm_cpuid_entry2 __user *entries)
844 if (cpuid->nent < vcpu->arch.cpuid_nent)
847 if (copy_to_user(entries, &vcpu->arch.cpuid_entries,
848 vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2)))
853 cpuid->nent = vcpu->arch.cpuid_nent;
857 static inline u32 bit(int bitno)
859 return 1 << (bitno & 31);
862 static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function,
865 entry->function = function;
866 entry->index = index;
867 cpuid_count(entry->function, entry->index,
868 &entry->eax, &entry->ebx, &entry->ecx, &entry->edx);
872 static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
873 u32 index, int *nent, int maxnent)
875 const u32 kvm_supported_word0_x86_features = bit(X86_FEATURE_FPU) |
876 bit(X86_FEATURE_VME) | bit(X86_FEATURE_DE) |
877 bit(X86_FEATURE_PSE) | bit(X86_FEATURE_TSC) |
878 bit(X86_FEATURE_MSR) | bit(X86_FEATURE_PAE) |
879 bit(X86_FEATURE_CX8) | bit(X86_FEATURE_APIC) |
880 bit(X86_FEATURE_SEP) | bit(X86_FEATURE_PGE) |
881 bit(X86_FEATURE_CMOV) | bit(X86_FEATURE_PSE36) |
882 bit(X86_FEATURE_CLFLSH) | bit(X86_FEATURE_MMX) |
883 bit(X86_FEATURE_FXSR) | bit(X86_FEATURE_XMM) |
884 bit(X86_FEATURE_XMM2) | bit(X86_FEATURE_SELFSNOOP);
885 const u32 kvm_supported_word1_x86_features = bit(X86_FEATURE_FPU) |
886 bit(X86_FEATURE_VME) | bit(X86_FEATURE_DE) |
887 bit(X86_FEATURE_PSE) | bit(X86_FEATURE_TSC) |
888 bit(X86_FEATURE_MSR) | bit(X86_FEATURE_PAE) |
889 bit(X86_FEATURE_CX8) | bit(X86_FEATURE_APIC) |
890 bit(X86_FEATURE_PGE) |
891 bit(X86_FEATURE_CMOV) | bit(X86_FEATURE_PSE36) |
892 bit(X86_FEATURE_MMX) | bit(X86_FEATURE_FXSR) |
893 bit(X86_FEATURE_SYSCALL) |
894 (bit(X86_FEATURE_NX) && is_efer_nx()) |
896 bit(X86_FEATURE_LM) |
898 bit(X86_FEATURE_MMXEXT) |
899 bit(X86_FEATURE_3DNOWEXT) |
900 bit(X86_FEATURE_3DNOW);
901 const u32 kvm_supported_word3_x86_features =
902 bit(X86_FEATURE_XMM3) | bit(X86_FEATURE_CX16);
903 const u32 kvm_supported_word6_x86_features =
904 bit(X86_FEATURE_LAHF_LM) | bit(X86_FEATURE_CMP_LEGACY);
906 /* all func 2 cpuid_count() should be called on the same cpu */
908 do_cpuid_1_ent(entry, function, index);
913 entry->eax = min(entry->eax, (u32)0xb);
916 entry->edx &= kvm_supported_word0_x86_features;
917 entry->ecx &= kvm_supported_word3_x86_features;
919 /* function 2 entries are STATEFUL. That is, repeated cpuid commands
920 * may return different values. This forces us to get_cpu() before
921 * issuing the first command, and also to emulate this annoying behavior
922 * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */
924 int t, times = entry->eax & 0xff;
926 entry->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC;
927 for (t = 1; t < times && *nent < maxnent; ++t) {
928 do_cpuid_1_ent(&entry[t], function, 0);
929 entry[t].flags |= KVM_CPUID_FLAG_STATEFUL_FUNC;
934 /* function 4 and 0xb have additional index. */
936 int index, cache_type;
938 entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
939 /* read more entries until cache_type is zero */
940 for (index = 1; *nent < maxnent; ++index) {
941 cache_type = entry[index - 1].eax & 0x1f;
944 do_cpuid_1_ent(&entry[index], function, index);
945 entry[index].flags |=
946 KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
952 int index, level_type;
954 entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
955 /* read more entries until level_type is zero */
956 for (index = 1; *nent < maxnent; ++index) {
957 level_type = entry[index - 1].ecx & 0xff;
960 do_cpuid_1_ent(&entry[index], function, index);
961 entry[index].flags |=
962 KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
968 entry->eax = min(entry->eax, 0x8000001a);
971 entry->edx &= kvm_supported_word1_x86_features;
972 entry->ecx &= kvm_supported_word6_x86_features;
978 static int kvm_vm_ioctl_get_supported_cpuid(struct kvm *kvm,
979 struct kvm_cpuid2 *cpuid,
980 struct kvm_cpuid_entry2 __user *entries)
982 struct kvm_cpuid_entry2 *cpuid_entries;
983 int limit, nent = 0, r = -E2BIG;
989 cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry2) * cpuid->nent);
993 do_cpuid_ent(&cpuid_entries[0], 0, 0, &nent, cpuid->nent);
994 limit = cpuid_entries[0].eax;
995 for (func = 1; func <= limit && nent < cpuid->nent; ++func)
996 do_cpuid_ent(&cpuid_entries[nent], func, 0,
999 if (nent >= cpuid->nent)
1002 do_cpuid_ent(&cpuid_entries[nent], 0x80000000, 0, &nent, cpuid->nent);
1003 limit = cpuid_entries[nent - 1].eax;
1004 for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func)
1005 do_cpuid_ent(&cpuid_entries[nent], func, 0,
1006 &nent, cpuid->nent);
1008 if (copy_to_user(entries, cpuid_entries,
1009 nent * sizeof(struct kvm_cpuid_entry2)))
1015 vfree(cpuid_entries);
1020 static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu,
1021 struct kvm_lapic_state *s)
1024 memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s);
1030 static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu,
1031 struct kvm_lapic_state *s)
1034 memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s);
1035 kvm_apic_post_state_restore(vcpu);
1041 static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
1042 struct kvm_interrupt *irq)
1044 if (irq->irq < 0 || irq->irq >= 256)
1046 if (irqchip_in_kernel(vcpu->kvm))
1050 set_bit(irq->irq, vcpu->arch.irq_pending);
1051 set_bit(irq->irq / BITS_PER_LONG, &vcpu->arch.irq_summary);
1058 long kvm_arch_vcpu_ioctl(struct file *filp,
1059 unsigned int ioctl, unsigned long arg)
1061 struct kvm_vcpu *vcpu = filp->private_data;
1062 void __user *argp = (void __user *)arg;
1066 case KVM_GET_LAPIC: {
1067 struct kvm_lapic_state lapic;
1069 memset(&lapic, 0, sizeof lapic);
1070 r = kvm_vcpu_ioctl_get_lapic(vcpu, &lapic);
1074 if (copy_to_user(argp, &lapic, sizeof lapic))
1079 case KVM_SET_LAPIC: {
1080 struct kvm_lapic_state lapic;
1083 if (copy_from_user(&lapic, argp, sizeof lapic))
1085 r = kvm_vcpu_ioctl_set_lapic(vcpu, &lapic);;
1091 case KVM_INTERRUPT: {
1092 struct kvm_interrupt irq;
1095 if (copy_from_user(&irq, argp, sizeof irq))
1097 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
1103 case KVM_SET_CPUID: {
1104 struct kvm_cpuid __user *cpuid_arg = argp;
1105 struct kvm_cpuid cpuid;
1108 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
1110 r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries);
1115 case KVM_SET_CPUID2: {
1116 struct kvm_cpuid2 __user *cpuid_arg = argp;
1117 struct kvm_cpuid2 cpuid;
1120 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
1122 r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid,
1123 cpuid_arg->entries);
1128 case KVM_GET_CPUID2: {
1129 struct kvm_cpuid2 __user *cpuid_arg = argp;
1130 struct kvm_cpuid2 cpuid;
1133 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
1135 r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid,
1136 cpuid_arg->entries);
1140 if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid))
1146 r = msr_io(vcpu, argp, kvm_get_msr, 1);
1149 r = msr_io(vcpu, argp, do_set_msr, 0);
1158 static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr)
1162 if (addr > (unsigned int)(-3 * PAGE_SIZE))
1164 ret = kvm_x86_ops->set_tss_addr(kvm, addr);
1168 static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm,
1169 u32 kvm_nr_mmu_pages)
1171 if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES)
1174 mutex_lock(&kvm->lock);
1176 kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages);
1177 kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages;
1179 mutex_unlock(&kvm->lock);
1183 static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm)
1185 return kvm->arch.n_alloc_mmu_pages;
1188 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
1191 struct kvm_mem_alias *alias;
1193 for (i = 0; i < kvm->arch.naliases; ++i) {
1194 alias = &kvm->arch.aliases[i];
1195 if (gfn >= alias->base_gfn
1196 && gfn < alias->base_gfn + alias->npages)
1197 return alias->target_gfn + gfn - alias->base_gfn;
1203 * Set a new alias region. Aliases map a portion of physical memory into
1204 * another portion. This is useful for memory windows, for example the PC
1207 static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm,
1208 struct kvm_memory_alias *alias)
1211 struct kvm_mem_alias *p;
1214 /* General sanity checks */
1215 if (alias->memory_size & (PAGE_SIZE - 1))
1217 if (alias->guest_phys_addr & (PAGE_SIZE - 1))
1219 if (alias->slot >= KVM_ALIAS_SLOTS)
1221 if (alias->guest_phys_addr + alias->memory_size
1222 < alias->guest_phys_addr)
1224 if (alias->target_phys_addr + alias->memory_size
1225 < alias->target_phys_addr)
1228 mutex_lock(&kvm->lock);
1230 p = &kvm->arch.aliases[alias->slot];
1231 p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT;
1232 p->npages = alias->memory_size >> PAGE_SHIFT;
1233 p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT;
1235 for (n = KVM_ALIAS_SLOTS; n > 0; --n)
1236 if (kvm->arch.aliases[n - 1].npages)
1238 kvm->arch.naliases = n;
1240 kvm_mmu_zap_all(kvm);
1242 mutex_unlock(&kvm->lock);
1250 static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
1255 switch (chip->chip_id) {
1256 case KVM_IRQCHIP_PIC_MASTER:
1257 memcpy(&chip->chip.pic,
1258 &pic_irqchip(kvm)->pics[0],
1259 sizeof(struct kvm_pic_state));
1261 case KVM_IRQCHIP_PIC_SLAVE:
1262 memcpy(&chip->chip.pic,
1263 &pic_irqchip(kvm)->pics[1],
1264 sizeof(struct kvm_pic_state));
1266 case KVM_IRQCHIP_IOAPIC:
1267 memcpy(&chip->chip.ioapic,
1268 ioapic_irqchip(kvm),
1269 sizeof(struct kvm_ioapic_state));
1278 static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
1283 switch (chip->chip_id) {
1284 case KVM_IRQCHIP_PIC_MASTER:
1285 memcpy(&pic_irqchip(kvm)->pics[0],
1287 sizeof(struct kvm_pic_state));
1289 case KVM_IRQCHIP_PIC_SLAVE:
1290 memcpy(&pic_irqchip(kvm)->pics[1],
1292 sizeof(struct kvm_pic_state));
1294 case KVM_IRQCHIP_IOAPIC:
1295 memcpy(ioapic_irqchip(kvm),
1297 sizeof(struct kvm_ioapic_state));
1303 kvm_pic_update_irq(pic_irqchip(kvm));
1308 * Get (and clear) the dirty memory log for a memory slot.
1310 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
1311 struct kvm_dirty_log *log)
1315 struct kvm_memory_slot *memslot;
1318 mutex_lock(&kvm->lock);
1320 r = kvm_get_dirty_log(kvm, log, &is_dirty);
1324 /* If nothing is dirty, don't bother messing with page tables. */
1326 kvm_mmu_slot_remove_write_access(kvm, log->slot);
1327 kvm_flush_remote_tlbs(kvm);
1328 memslot = &kvm->memslots[log->slot];
1329 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
1330 memset(memslot->dirty_bitmap, 0, n);
1334 mutex_unlock(&kvm->lock);
1338 long kvm_arch_vm_ioctl(struct file *filp,
1339 unsigned int ioctl, unsigned long arg)
1341 struct kvm *kvm = filp->private_data;
1342 void __user *argp = (void __user *)arg;
1346 case KVM_SET_TSS_ADDR:
1347 r = kvm_vm_ioctl_set_tss_addr(kvm, arg);
1351 case KVM_SET_MEMORY_REGION: {
1352 struct kvm_memory_region kvm_mem;
1353 struct kvm_userspace_memory_region kvm_userspace_mem;
1356 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
1358 kvm_userspace_mem.slot = kvm_mem.slot;
1359 kvm_userspace_mem.flags = kvm_mem.flags;
1360 kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr;
1361 kvm_userspace_mem.memory_size = kvm_mem.memory_size;
1362 r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0);
1367 case KVM_SET_NR_MMU_PAGES:
1368 r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg);
1372 case KVM_GET_NR_MMU_PAGES:
1373 r = kvm_vm_ioctl_get_nr_mmu_pages(kvm);
1375 case KVM_SET_MEMORY_ALIAS: {
1376 struct kvm_memory_alias alias;
1379 if (copy_from_user(&alias, argp, sizeof alias))
1381 r = kvm_vm_ioctl_set_memory_alias(kvm, &alias);
1386 case KVM_CREATE_IRQCHIP:
1388 kvm->arch.vpic = kvm_create_pic(kvm);
1389 if (kvm->arch.vpic) {
1390 r = kvm_ioapic_init(kvm);
1392 kfree(kvm->arch.vpic);
1393 kvm->arch.vpic = NULL;
1399 case KVM_IRQ_LINE: {
1400 struct kvm_irq_level irq_event;
1403 if (copy_from_user(&irq_event, argp, sizeof irq_event))
1405 if (irqchip_in_kernel(kvm)) {
1406 mutex_lock(&kvm->lock);
1407 if (irq_event.irq < 16)
1408 kvm_pic_set_irq(pic_irqchip(kvm),
1411 kvm_ioapic_set_irq(kvm->arch.vioapic,
1414 mutex_unlock(&kvm->lock);
1419 case KVM_GET_IRQCHIP: {
1420 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1421 struct kvm_irqchip chip;
1424 if (copy_from_user(&chip, argp, sizeof chip))
1427 if (!irqchip_in_kernel(kvm))
1429 r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
1433 if (copy_to_user(argp, &chip, sizeof chip))
1438 case KVM_SET_IRQCHIP: {
1439 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1440 struct kvm_irqchip chip;
1443 if (copy_from_user(&chip, argp, sizeof chip))
1446 if (!irqchip_in_kernel(kvm))
1448 r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
1454 case KVM_GET_SUPPORTED_CPUID: {
1455 struct kvm_cpuid2 __user *cpuid_arg = argp;
1456 struct kvm_cpuid2 cpuid;
1459 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
1461 r = kvm_vm_ioctl_get_supported_cpuid(kvm, &cpuid,
1462 cpuid_arg->entries);
1467 if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid))
1479 static void kvm_init_msr_list(void)
1484 for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) {
1485 if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0)
1488 msrs_to_save[j] = msrs_to_save[i];
1491 num_msrs_to_save = j;
1495 * Only apic need an MMIO device hook, so shortcut now..
1497 static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu,
1500 struct kvm_io_device *dev;
1502 if (vcpu->arch.apic) {
1503 dev = &vcpu->arch.apic->dev;
1504 if (dev->in_range(dev, addr))
1511 static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu,
1514 struct kvm_io_device *dev;
1516 dev = vcpu_find_pervcpu_dev(vcpu, addr);
1518 dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr);
1522 int emulator_read_std(unsigned long addr,
1525 struct kvm_vcpu *vcpu)
1530 gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr);
1531 unsigned offset = addr & (PAGE_SIZE-1);
1532 unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset);
1535 if (gpa == UNMAPPED_GVA)
1536 return X86EMUL_PROPAGATE_FAULT;
1537 ret = kvm_read_guest(vcpu->kvm, gpa, data, tocopy);
1539 return X86EMUL_UNHANDLEABLE;
1546 return X86EMUL_CONTINUE;
1548 EXPORT_SYMBOL_GPL(emulator_read_std);
1550 static int emulator_read_emulated(unsigned long addr,
1553 struct kvm_vcpu *vcpu)
1555 struct kvm_io_device *mmio_dev;
1558 if (vcpu->mmio_read_completed) {
1559 memcpy(val, vcpu->mmio_data, bytes);
1560 vcpu->mmio_read_completed = 0;
1561 return X86EMUL_CONTINUE;
1564 gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr);
1566 /* For APIC access vmexit */
1567 if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
1570 if (emulator_read_std(addr, val, bytes, vcpu)
1571 == X86EMUL_CONTINUE)
1572 return X86EMUL_CONTINUE;
1573 if (gpa == UNMAPPED_GVA)
1574 return X86EMUL_PROPAGATE_FAULT;
1578 * Is this MMIO handled locally?
1580 mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1582 kvm_iodevice_read(mmio_dev, gpa, bytes, val);
1583 return X86EMUL_CONTINUE;
1586 vcpu->mmio_needed = 1;
1587 vcpu->mmio_phys_addr = gpa;
1588 vcpu->mmio_size = bytes;
1589 vcpu->mmio_is_write = 0;
1591 return X86EMUL_UNHANDLEABLE;
1594 static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
1595 const void *val, int bytes)
1599 ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes);
1602 kvm_mmu_pte_write(vcpu, gpa, val, bytes);
1606 static int emulator_write_emulated_onepage(unsigned long addr,
1609 struct kvm_vcpu *vcpu)
1611 struct kvm_io_device *mmio_dev;
1612 gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr);
1614 if (gpa == UNMAPPED_GVA) {
1615 kvm_inject_page_fault(vcpu, addr, 2);
1616 return X86EMUL_PROPAGATE_FAULT;
1619 /* For APIC access vmexit */
1620 if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
1623 if (emulator_write_phys(vcpu, gpa, val, bytes))
1624 return X86EMUL_CONTINUE;
1628 * Is this MMIO handled locally?
1630 mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1632 kvm_iodevice_write(mmio_dev, gpa, bytes, val);
1633 return X86EMUL_CONTINUE;
1636 vcpu->mmio_needed = 1;
1637 vcpu->mmio_phys_addr = gpa;
1638 vcpu->mmio_size = bytes;
1639 vcpu->mmio_is_write = 1;
1640 memcpy(vcpu->mmio_data, val, bytes);
1642 return X86EMUL_CONTINUE;
1645 int emulator_write_emulated(unsigned long addr,
1648 struct kvm_vcpu *vcpu)
1650 /* Crossing a page boundary? */
1651 if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
1654 now = -addr & ~PAGE_MASK;
1655 rc = emulator_write_emulated_onepage(addr, val, now, vcpu);
1656 if (rc != X86EMUL_CONTINUE)
1662 return emulator_write_emulated_onepage(addr, val, bytes, vcpu);
1664 EXPORT_SYMBOL_GPL(emulator_write_emulated);
1666 static int emulator_cmpxchg_emulated(unsigned long addr,
1670 struct kvm_vcpu *vcpu)
1672 static int reported;
1676 printk(KERN_WARNING "kvm: emulating exchange as write\n");
1678 #ifndef CONFIG_X86_64
1679 /* guests cmpxchg8b have to be emulated atomically */
1681 gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr);
1686 if (gpa == UNMAPPED_GVA ||
1687 (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
1690 if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK))
1694 page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT);
1695 addr = kmap_atomic(page, KM_USER0);
1696 set_64bit((u64 *)(addr + offset_in_page(gpa)), val);
1697 kunmap_atomic(addr, KM_USER0);
1698 kvm_release_page_dirty(page);
1703 return emulator_write_emulated(addr, new, bytes, vcpu);
1706 static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)
1708 return kvm_x86_ops->get_segment_base(vcpu, seg);
1711 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address)
1713 return X86EMUL_CONTINUE;
1716 int emulate_clts(struct kvm_vcpu *vcpu)
1718 kvm_x86_ops->set_cr0(vcpu, vcpu->arch.cr0 & ~X86_CR0_TS);
1719 return X86EMUL_CONTINUE;
1722 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest)
1724 struct kvm_vcpu *vcpu = ctxt->vcpu;
1728 *dest = kvm_x86_ops->get_dr(vcpu, dr);
1729 return X86EMUL_CONTINUE;
1731 pr_unimpl(vcpu, "%s: unexpected dr %u\n", __FUNCTION__, dr);
1732 return X86EMUL_UNHANDLEABLE;
1736 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
1738 unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U;
1741 kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception);
1743 /* FIXME: better handling */
1744 return X86EMUL_UNHANDLEABLE;
1746 return X86EMUL_CONTINUE;
1749 void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context)
1751 static int reported;
1753 unsigned long rip = vcpu->arch.rip;
1754 unsigned long rip_linear;
1756 rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS);
1761 emulator_read_std(rip_linear, (void *)opcodes, 4, vcpu);
1763 printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
1764 context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]);
1767 EXPORT_SYMBOL_GPL(kvm_report_emulation_failure);
1769 struct x86_emulate_ops emulate_ops = {
1770 .read_std = emulator_read_std,
1771 .read_emulated = emulator_read_emulated,
1772 .write_emulated = emulator_write_emulated,
1773 .cmpxchg_emulated = emulator_cmpxchg_emulated,
1776 int emulate_instruction(struct kvm_vcpu *vcpu,
1777 struct kvm_run *run,
1784 vcpu->arch.mmio_fault_cr2 = cr2;
1785 kvm_x86_ops->cache_regs(vcpu);
1787 vcpu->mmio_is_write = 0;
1788 vcpu->arch.pio.string = 0;
1792 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
1794 vcpu->arch.emulate_ctxt.vcpu = vcpu;
1795 vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu);
1796 vcpu->arch.emulate_ctxt.mode =
1797 (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM)
1798 ? X86EMUL_MODE_REAL : cs_l
1799 ? X86EMUL_MODE_PROT64 : cs_db
1800 ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
1802 if (vcpu->arch.emulate_ctxt.mode == X86EMUL_MODE_PROT64) {
1803 vcpu->arch.emulate_ctxt.cs_base = 0;
1804 vcpu->arch.emulate_ctxt.ds_base = 0;
1805 vcpu->arch.emulate_ctxt.es_base = 0;
1806 vcpu->arch.emulate_ctxt.ss_base = 0;
1808 vcpu->arch.emulate_ctxt.cs_base =
1809 get_segment_base(vcpu, VCPU_SREG_CS);
1810 vcpu->arch.emulate_ctxt.ds_base =
1811 get_segment_base(vcpu, VCPU_SREG_DS);
1812 vcpu->arch.emulate_ctxt.es_base =
1813 get_segment_base(vcpu, VCPU_SREG_ES);
1814 vcpu->arch.emulate_ctxt.ss_base =
1815 get_segment_base(vcpu, VCPU_SREG_SS);
1818 vcpu->arch.emulate_ctxt.gs_base =
1819 get_segment_base(vcpu, VCPU_SREG_GS);
1820 vcpu->arch.emulate_ctxt.fs_base =
1821 get_segment_base(vcpu, VCPU_SREG_FS);
1823 r = x86_decode_insn(&vcpu->arch.emulate_ctxt, &emulate_ops);
1824 ++vcpu->stat.insn_emulation;
1826 ++vcpu->stat.insn_emulation_fail;
1827 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
1828 return EMULATE_DONE;
1829 return EMULATE_FAIL;
1833 r = x86_emulate_insn(&vcpu->arch.emulate_ctxt, &emulate_ops);
1835 if (vcpu->arch.pio.string)
1836 return EMULATE_DO_MMIO;
1838 if ((r || vcpu->mmio_is_write) && run) {
1839 run->exit_reason = KVM_EXIT_MMIO;
1840 run->mmio.phys_addr = vcpu->mmio_phys_addr;
1841 memcpy(run->mmio.data, vcpu->mmio_data, 8);
1842 run->mmio.len = vcpu->mmio_size;
1843 run->mmio.is_write = vcpu->mmio_is_write;
1847 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
1848 return EMULATE_DONE;
1849 if (!vcpu->mmio_needed) {
1850 kvm_report_emulation_failure(vcpu, "mmio");
1851 return EMULATE_FAIL;
1853 return EMULATE_DO_MMIO;
1856 kvm_x86_ops->decache_regs(vcpu);
1857 kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags);
1859 if (vcpu->mmio_is_write) {
1860 vcpu->mmio_needed = 0;
1861 return EMULATE_DO_MMIO;
1864 return EMULATE_DONE;
1866 EXPORT_SYMBOL_GPL(emulate_instruction);
1868 static void free_pio_guest_pages(struct kvm_vcpu *vcpu)
1872 for (i = 0; i < ARRAY_SIZE(vcpu->arch.pio.guest_pages); ++i)
1873 if (vcpu->arch.pio.guest_pages[i]) {
1874 kvm_release_page_dirty(vcpu->arch.pio.guest_pages[i]);
1875 vcpu->arch.pio.guest_pages[i] = NULL;
1879 static int pio_copy_data(struct kvm_vcpu *vcpu)
1881 void *p = vcpu->arch.pio_data;
1884 int nr_pages = vcpu->arch.pio.guest_pages[1] ? 2 : 1;
1886 q = vmap(vcpu->arch.pio.guest_pages, nr_pages, VM_READ|VM_WRITE,
1889 free_pio_guest_pages(vcpu);
1892 q += vcpu->arch.pio.guest_page_offset;
1893 bytes = vcpu->arch.pio.size * vcpu->arch.pio.cur_count;
1894 if (vcpu->arch.pio.in)
1895 memcpy(q, p, bytes);
1897 memcpy(p, q, bytes);
1898 q -= vcpu->arch.pio.guest_page_offset;
1900 free_pio_guest_pages(vcpu);
1904 int complete_pio(struct kvm_vcpu *vcpu)
1906 struct kvm_pio_request *io = &vcpu->arch.pio;
1910 kvm_x86_ops->cache_regs(vcpu);
1914 memcpy(&vcpu->arch.regs[VCPU_REGS_RAX], vcpu->arch.pio_data,
1918 r = pio_copy_data(vcpu);
1920 kvm_x86_ops->cache_regs(vcpu);
1927 delta *= io->cur_count;
1929 * The size of the register should really depend on
1930 * current address size.
1932 vcpu->arch.regs[VCPU_REGS_RCX] -= delta;
1938 vcpu->arch.regs[VCPU_REGS_RDI] += delta;
1940 vcpu->arch.regs[VCPU_REGS_RSI] += delta;
1943 kvm_x86_ops->decache_regs(vcpu);
1945 io->count -= io->cur_count;
1951 static void kernel_pio(struct kvm_io_device *pio_dev,
1952 struct kvm_vcpu *vcpu,
1955 /* TODO: String I/O for in kernel device */
1957 mutex_lock(&vcpu->kvm->lock);
1958 if (vcpu->arch.pio.in)
1959 kvm_iodevice_read(pio_dev, vcpu->arch.pio.port,
1960 vcpu->arch.pio.size,
1963 kvm_iodevice_write(pio_dev, vcpu->arch.pio.port,
1964 vcpu->arch.pio.size,
1966 mutex_unlock(&vcpu->kvm->lock);
1969 static void pio_string_write(struct kvm_io_device *pio_dev,
1970 struct kvm_vcpu *vcpu)
1972 struct kvm_pio_request *io = &vcpu->arch.pio;
1973 void *pd = vcpu->arch.pio_data;
1976 mutex_lock(&vcpu->kvm->lock);
1977 for (i = 0; i < io->cur_count; i++) {
1978 kvm_iodevice_write(pio_dev, io->port,
1983 mutex_unlock(&vcpu->kvm->lock);
1986 static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu,
1989 return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr);
1992 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
1993 int size, unsigned port)
1995 struct kvm_io_device *pio_dev;
1997 vcpu->run->exit_reason = KVM_EXIT_IO;
1998 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
1999 vcpu->run->io.size = vcpu->arch.pio.size = size;
2000 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
2001 vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = 1;
2002 vcpu->run->io.port = vcpu->arch.pio.port = port;
2003 vcpu->arch.pio.in = in;
2004 vcpu->arch.pio.string = 0;
2005 vcpu->arch.pio.down = 0;
2006 vcpu->arch.pio.guest_page_offset = 0;
2007 vcpu->arch.pio.rep = 0;
2009 kvm_x86_ops->cache_regs(vcpu);
2010 memcpy(vcpu->arch.pio_data, &vcpu->arch.regs[VCPU_REGS_RAX], 4);
2011 kvm_x86_ops->decache_regs(vcpu);
2013 kvm_x86_ops->skip_emulated_instruction(vcpu);
2015 pio_dev = vcpu_find_pio_dev(vcpu, port);
2017 kernel_pio(pio_dev, vcpu, vcpu->arch.pio_data);
2023 EXPORT_SYMBOL_GPL(kvm_emulate_pio);
2025 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
2026 int size, unsigned long count, int down,
2027 gva_t address, int rep, unsigned port)
2029 unsigned now, in_page;
2033 struct kvm_io_device *pio_dev;
2035 vcpu->run->exit_reason = KVM_EXIT_IO;
2036 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
2037 vcpu->run->io.size = vcpu->arch.pio.size = size;
2038 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
2039 vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = count;
2040 vcpu->run->io.port = vcpu->arch.pio.port = port;
2041 vcpu->arch.pio.in = in;
2042 vcpu->arch.pio.string = 1;
2043 vcpu->arch.pio.down = down;
2044 vcpu->arch.pio.guest_page_offset = offset_in_page(address);
2045 vcpu->arch.pio.rep = rep;
2048 kvm_x86_ops->skip_emulated_instruction(vcpu);
2053 in_page = PAGE_SIZE - offset_in_page(address);
2055 in_page = offset_in_page(address) + size;
2056 now = min(count, (unsigned long)in_page / size);
2059 * String I/O straddles page boundary. Pin two guest pages
2060 * so that we satisfy atomicity constraints. Do just one
2061 * transaction to avoid complexity.
2068 * String I/O in reverse. Yuck. Kill the guest, fix later.
2070 pr_unimpl(vcpu, "guest string pio down\n");
2071 kvm_inject_gp(vcpu, 0);
2074 vcpu->run->io.count = now;
2075 vcpu->arch.pio.cur_count = now;
2077 if (vcpu->arch.pio.cur_count == vcpu->arch.pio.count)
2078 kvm_x86_ops->skip_emulated_instruction(vcpu);
2080 for (i = 0; i < nr_pages; ++i) {
2081 mutex_lock(&vcpu->kvm->lock);
2082 page = gva_to_page(vcpu, address + i * PAGE_SIZE);
2083 vcpu->arch.pio.guest_pages[i] = page;
2084 mutex_unlock(&vcpu->kvm->lock);
2086 kvm_inject_gp(vcpu, 0);
2087 free_pio_guest_pages(vcpu);
2092 pio_dev = vcpu_find_pio_dev(vcpu, port);
2093 if (!vcpu->arch.pio.in) {
2094 /* string PIO write */
2095 ret = pio_copy_data(vcpu);
2096 if (ret >= 0 && pio_dev) {
2097 pio_string_write(pio_dev, vcpu);
2099 if (vcpu->arch.pio.count == 0)
2103 pr_unimpl(vcpu, "no string pio read support yet, "
2104 "port %x size %d count %ld\n",
2109 EXPORT_SYMBOL_GPL(kvm_emulate_pio_string);
2111 int kvm_arch_init(void *opaque)
2114 struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque;
2116 r = kvm_mmu_module_init();
2120 kvm_init_msr_list();
2123 printk(KERN_ERR "kvm: already loaded the other module\n");
2128 if (!ops->cpu_has_kvm_support()) {
2129 printk(KERN_ERR "kvm: no hardware support\n");
2133 if (ops->disabled_by_bios()) {
2134 printk(KERN_ERR "kvm: disabled by bios\n");
2140 kvm_mmu_set_nonpresent_ptes(0ull, 0ull);
2144 kvm_mmu_module_exit();
2149 void kvm_arch_exit(void)
2152 kvm_mmu_module_exit();
2155 int kvm_emulate_halt(struct kvm_vcpu *vcpu)
2157 ++vcpu->stat.halt_exits;
2158 if (irqchip_in_kernel(vcpu->kvm)) {
2159 vcpu->arch.mp_state = VCPU_MP_STATE_HALTED;
2160 kvm_vcpu_block(vcpu);
2161 if (vcpu->arch.mp_state != VCPU_MP_STATE_RUNNABLE)
2165 vcpu->run->exit_reason = KVM_EXIT_HLT;
2169 EXPORT_SYMBOL_GPL(kvm_emulate_halt);
2171 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
2173 unsigned long nr, a0, a1, a2, a3, ret;
2175 kvm_x86_ops->cache_regs(vcpu);
2177 nr = vcpu->arch.regs[VCPU_REGS_RAX];
2178 a0 = vcpu->arch.regs[VCPU_REGS_RBX];
2179 a1 = vcpu->arch.regs[VCPU_REGS_RCX];
2180 a2 = vcpu->arch.regs[VCPU_REGS_RDX];
2181 a3 = vcpu->arch.regs[VCPU_REGS_RSI];
2183 if (!is_long_mode(vcpu)) {
2196 vcpu->arch.regs[VCPU_REGS_RAX] = ret;
2197 kvm_x86_ops->decache_regs(vcpu);
2200 EXPORT_SYMBOL_GPL(kvm_emulate_hypercall);
2202 int kvm_fix_hypercall(struct kvm_vcpu *vcpu)
2204 char instruction[3];
2207 mutex_lock(&vcpu->kvm->lock);
2210 * Blow out the MMU to ensure that no other VCPU has an active mapping
2211 * to ensure that the updated hypercall appears atomically across all
2214 kvm_mmu_zap_all(vcpu->kvm);
2216 kvm_x86_ops->cache_regs(vcpu);
2217 kvm_x86_ops->patch_hypercall(vcpu, instruction);
2218 if (emulator_write_emulated(vcpu->arch.rip, instruction, 3, vcpu)
2219 != X86EMUL_CONTINUE)
2222 mutex_unlock(&vcpu->kvm->lock);
2227 static u64 mk_cr_64(u64 curr_cr, u32 new_val)
2229 return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
2232 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
2234 struct descriptor_table dt = { limit, base };
2236 kvm_x86_ops->set_gdt(vcpu, &dt);
2239 void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
2241 struct descriptor_table dt = { limit, base };
2243 kvm_x86_ops->set_idt(vcpu, &dt);
2246 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
2247 unsigned long *rflags)
2250 *rflags = kvm_x86_ops->get_rflags(vcpu);
2253 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr)
2255 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
2258 return vcpu->arch.cr0;
2260 return vcpu->arch.cr2;
2262 return vcpu->arch.cr3;
2264 return vcpu->arch.cr4;
2266 return get_cr8(vcpu);
2268 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
2273 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val,
2274 unsigned long *rflags)
2278 set_cr0(vcpu, mk_cr_64(vcpu->arch.cr0, val));
2279 *rflags = kvm_x86_ops->get_rflags(vcpu);
2282 vcpu->arch.cr2 = val;
2288 set_cr4(vcpu, mk_cr_64(vcpu->arch.cr4, val));
2291 set_cr8(vcpu, val & 0xfUL);
2294 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
2298 static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i)
2300 struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i];
2301 int j, nent = vcpu->arch.cpuid_nent;
2303 e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT;
2304 /* when no next entry is found, the current entry[i] is reselected */
2305 for (j = i + 1; j == i; j = (j + 1) % nent) {
2306 struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j];
2307 if (ej->function == e->function) {
2308 ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT;
2312 return 0; /* silence gcc, even though control never reaches here */
2315 /* find an entry with matching function, matching index (if needed), and that
2316 * should be read next (if it's stateful) */
2317 static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e,
2318 u32 function, u32 index)
2320 if (e->function != function)
2322 if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index)
2324 if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) &&
2325 !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT))
2330 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
2333 u32 function, index;
2334 struct kvm_cpuid_entry2 *e, *best;
2336 kvm_x86_ops->cache_regs(vcpu);
2337 function = vcpu->arch.regs[VCPU_REGS_RAX];
2338 index = vcpu->arch.regs[VCPU_REGS_RCX];
2339 vcpu->arch.regs[VCPU_REGS_RAX] = 0;
2340 vcpu->arch.regs[VCPU_REGS_RBX] = 0;
2341 vcpu->arch.regs[VCPU_REGS_RCX] = 0;
2342 vcpu->arch.regs[VCPU_REGS_RDX] = 0;
2344 for (i = 0; i < vcpu->arch.cpuid_nent; ++i) {
2345 e = &vcpu->arch.cpuid_entries[i];
2346 if (is_matching_cpuid_entry(e, function, index)) {
2347 if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC)
2348 move_to_next_stateful_cpuid_entry(vcpu, i);
2353 * Both basic or both extended?
2355 if (((e->function ^ function) & 0x80000000) == 0)
2356 if (!best || e->function > best->function)
2360 vcpu->arch.regs[VCPU_REGS_RAX] = best->eax;
2361 vcpu->arch.regs[VCPU_REGS_RBX] = best->ebx;
2362 vcpu->arch.regs[VCPU_REGS_RCX] = best->ecx;
2363 vcpu->arch.regs[VCPU_REGS_RDX] = best->edx;
2365 kvm_x86_ops->decache_regs(vcpu);
2366 kvm_x86_ops->skip_emulated_instruction(vcpu);
2368 EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
2371 * Check if userspace requested an interrupt window, and that the
2372 * interrupt window is open.
2374 * No need to exit to userspace if we already have an interrupt queued.
2376 static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
2377 struct kvm_run *kvm_run)
2379 return (!vcpu->arch.irq_summary &&
2380 kvm_run->request_interrupt_window &&
2381 vcpu->arch.interrupt_window_open &&
2382 (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF));
2385 static void post_kvm_run_save(struct kvm_vcpu *vcpu,
2386 struct kvm_run *kvm_run)
2388 kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
2389 kvm_run->cr8 = get_cr8(vcpu);
2390 kvm_run->apic_base = kvm_get_apic_base(vcpu);
2391 if (irqchip_in_kernel(vcpu->kvm))
2392 kvm_run->ready_for_interrupt_injection = 1;
2394 kvm_run->ready_for_interrupt_injection =
2395 (vcpu->arch.interrupt_window_open &&
2396 vcpu->arch.irq_summary == 0);
2399 static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2403 if (unlikely(vcpu->arch.mp_state == VCPU_MP_STATE_SIPI_RECEIVED)) {
2404 pr_debug("vcpu %d received sipi with vector # %x\n",
2405 vcpu->vcpu_id, vcpu->arch.sipi_vector);
2406 kvm_lapic_reset(vcpu);
2407 r = kvm_x86_ops->vcpu_reset(vcpu);
2410 vcpu->arch.mp_state = VCPU_MP_STATE_RUNNABLE;
2414 if (vcpu->guest_debug.enabled)
2415 kvm_x86_ops->guest_debug_pre(vcpu);
2418 r = kvm_mmu_reload(vcpu);
2422 kvm_inject_pending_timer_irqs(vcpu);
2426 kvm_x86_ops->prepare_guest_switch(vcpu);
2427 kvm_load_guest_fpu(vcpu);
2429 local_irq_disable();
2431 if (signal_pending(current)) {
2435 kvm_run->exit_reason = KVM_EXIT_INTR;
2436 ++vcpu->stat.signal_exits;
2440 if (vcpu->arch.exception.pending)
2441 __queue_exception(vcpu);
2442 else if (irqchip_in_kernel(vcpu->kvm))
2443 kvm_x86_ops->inject_pending_irq(vcpu);
2445 kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run);
2447 vcpu->guest_mode = 1;
2451 if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
2452 kvm_x86_ops->tlb_flush(vcpu);
2454 kvm_x86_ops->run(vcpu, kvm_run);
2456 vcpu->guest_mode = 0;
2462 * We must have an instruction between local_irq_enable() and
2463 * kvm_guest_exit(), so the timer interrupt isn't delayed by
2464 * the interrupt shadow. The stat.exits increment will do nicely.
2465 * But we need to prevent reordering, hence this barrier():
2474 * Profile KVM exit RIPs:
2476 if (unlikely(prof_on == KVM_PROFILING)) {
2477 kvm_x86_ops->cache_regs(vcpu);
2478 profile_hit(KVM_PROFILING, (void *)vcpu->arch.rip);
2481 if (vcpu->arch.exception.pending && kvm_x86_ops->exception_injected(vcpu))
2482 vcpu->arch.exception.pending = false;
2484 r = kvm_x86_ops->handle_exit(kvm_run, vcpu);
2487 if (dm_request_for_irq_injection(vcpu, kvm_run)) {
2489 kvm_run->exit_reason = KVM_EXIT_INTR;
2490 ++vcpu->stat.request_irq_exits;
2493 if (!need_resched())
2503 post_kvm_run_save(vcpu, kvm_run);
2508 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2515 if (unlikely(vcpu->arch.mp_state == VCPU_MP_STATE_UNINITIALIZED)) {
2516 kvm_vcpu_block(vcpu);
2521 if (vcpu->sigset_active)
2522 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
2524 /* re-sync apic's tpr */
2525 if (!irqchip_in_kernel(vcpu->kvm))
2526 set_cr8(vcpu, kvm_run->cr8);
2528 if (vcpu->arch.pio.cur_count) {
2529 r = complete_pio(vcpu);
2533 #if CONFIG_HAS_IOMEM
2534 if (vcpu->mmio_needed) {
2535 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
2536 vcpu->mmio_read_completed = 1;
2537 vcpu->mmio_needed = 0;
2538 r = emulate_instruction(vcpu, kvm_run,
2539 vcpu->arch.mmio_fault_cr2, 0, 1);
2540 if (r == EMULATE_DO_MMIO) {
2542 * Read-modify-write. Back to userspace.
2549 if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) {
2550 kvm_x86_ops->cache_regs(vcpu);
2551 vcpu->arch.regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret;
2552 kvm_x86_ops->decache_regs(vcpu);
2555 r = __vcpu_run(vcpu, kvm_run);
2558 if (vcpu->sigset_active)
2559 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2565 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
2569 kvm_x86_ops->cache_regs(vcpu);
2571 regs->rax = vcpu->arch.regs[VCPU_REGS_RAX];
2572 regs->rbx = vcpu->arch.regs[VCPU_REGS_RBX];
2573 regs->rcx = vcpu->arch.regs[VCPU_REGS_RCX];
2574 regs->rdx = vcpu->arch.regs[VCPU_REGS_RDX];
2575 regs->rsi = vcpu->arch.regs[VCPU_REGS_RSI];
2576 regs->rdi = vcpu->arch.regs[VCPU_REGS_RDI];
2577 regs->rsp = vcpu->arch.regs[VCPU_REGS_RSP];
2578 regs->rbp = vcpu->arch.regs[VCPU_REGS_RBP];
2579 #ifdef CONFIG_X86_64
2580 regs->r8 = vcpu->arch.regs[VCPU_REGS_R8];
2581 regs->r9 = vcpu->arch.regs[VCPU_REGS_R9];
2582 regs->r10 = vcpu->arch.regs[VCPU_REGS_R10];
2583 regs->r11 = vcpu->arch.regs[VCPU_REGS_R11];
2584 regs->r12 = vcpu->arch.regs[VCPU_REGS_R12];
2585 regs->r13 = vcpu->arch.regs[VCPU_REGS_R13];
2586 regs->r14 = vcpu->arch.regs[VCPU_REGS_R14];
2587 regs->r15 = vcpu->arch.regs[VCPU_REGS_R15];
2590 regs->rip = vcpu->arch.rip;
2591 regs->rflags = kvm_x86_ops->get_rflags(vcpu);
2594 * Don't leak debug flags in case they were set for guest debugging
2596 if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep)
2597 regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
2604 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
2608 vcpu->arch.regs[VCPU_REGS_RAX] = regs->rax;
2609 vcpu->arch.regs[VCPU_REGS_RBX] = regs->rbx;
2610 vcpu->arch.regs[VCPU_REGS_RCX] = regs->rcx;
2611 vcpu->arch.regs[VCPU_REGS_RDX] = regs->rdx;
2612 vcpu->arch.regs[VCPU_REGS_RSI] = regs->rsi;
2613 vcpu->arch.regs[VCPU_REGS_RDI] = regs->rdi;
2614 vcpu->arch.regs[VCPU_REGS_RSP] = regs->rsp;
2615 vcpu->arch.regs[VCPU_REGS_RBP] = regs->rbp;
2616 #ifdef CONFIG_X86_64
2617 vcpu->arch.regs[VCPU_REGS_R8] = regs->r8;
2618 vcpu->arch.regs[VCPU_REGS_R9] = regs->r9;
2619 vcpu->arch.regs[VCPU_REGS_R10] = regs->r10;
2620 vcpu->arch.regs[VCPU_REGS_R11] = regs->r11;
2621 vcpu->arch.regs[VCPU_REGS_R12] = regs->r12;
2622 vcpu->arch.regs[VCPU_REGS_R13] = regs->r13;
2623 vcpu->arch.regs[VCPU_REGS_R14] = regs->r14;
2624 vcpu->arch.regs[VCPU_REGS_R15] = regs->r15;
2627 vcpu->arch.rip = regs->rip;
2628 kvm_x86_ops->set_rflags(vcpu, regs->rflags);
2630 kvm_x86_ops->decache_regs(vcpu);
2637 static void get_segment(struct kvm_vcpu *vcpu,
2638 struct kvm_segment *var, int seg)
2640 return kvm_x86_ops->get_segment(vcpu, var, seg);
2643 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
2645 struct kvm_segment cs;
2647 get_segment(vcpu, &cs, VCPU_SREG_CS);
2651 EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
2653 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
2654 struct kvm_sregs *sregs)
2656 struct descriptor_table dt;
2661 get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
2662 get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
2663 get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
2664 get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
2665 get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
2666 get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
2668 get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
2669 get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
2671 kvm_x86_ops->get_idt(vcpu, &dt);
2672 sregs->idt.limit = dt.limit;
2673 sregs->idt.base = dt.base;
2674 kvm_x86_ops->get_gdt(vcpu, &dt);
2675 sregs->gdt.limit = dt.limit;
2676 sregs->gdt.base = dt.base;
2678 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
2679 sregs->cr0 = vcpu->arch.cr0;
2680 sregs->cr2 = vcpu->arch.cr2;
2681 sregs->cr3 = vcpu->arch.cr3;
2682 sregs->cr4 = vcpu->arch.cr4;
2683 sregs->cr8 = get_cr8(vcpu);
2684 sregs->efer = vcpu->arch.shadow_efer;
2685 sregs->apic_base = kvm_get_apic_base(vcpu);
2687 if (irqchip_in_kernel(vcpu->kvm)) {
2688 memset(sregs->interrupt_bitmap, 0,
2689 sizeof sregs->interrupt_bitmap);
2690 pending_vec = kvm_x86_ops->get_irq(vcpu);
2691 if (pending_vec >= 0)
2692 set_bit(pending_vec,
2693 (unsigned long *)sregs->interrupt_bitmap);
2695 memcpy(sregs->interrupt_bitmap, vcpu->arch.irq_pending,
2696 sizeof sregs->interrupt_bitmap);
2703 static void set_segment(struct kvm_vcpu *vcpu,
2704 struct kvm_segment *var, int seg)
2706 return kvm_x86_ops->set_segment(vcpu, var, seg);
2709 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
2710 struct kvm_sregs *sregs)
2712 int mmu_reset_needed = 0;
2713 int i, pending_vec, max_bits;
2714 struct descriptor_table dt;
2718 dt.limit = sregs->idt.limit;
2719 dt.base = sregs->idt.base;
2720 kvm_x86_ops->set_idt(vcpu, &dt);
2721 dt.limit = sregs->gdt.limit;
2722 dt.base = sregs->gdt.base;
2723 kvm_x86_ops->set_gdt(vcpu, &dt);
2725 vcpu->arch.cr2 = sregs->cr2;
2726 mmu_reset_needed |= vcpu->arch.cr3 != sregs->cr3;
2727 vcpu->arch.cr3 = sregs->cr3;
2729 set_cr8(vcpu, sregs->cr8);
2731 mmu_reset_needed |= vcpu->arch.shadow_efer != sregs->efer;
2732 #ifdef CONFIG_X86_64
2733 kvm_x86_ops->set_efer(vcpu, sregs->efer);
2735 kvm_set_apic_base(vcpu, sregs->apic_base);
2737 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
2739 mmu_reset_needed |= vcpu->arch.cr0 != sregs->cr0;
2740 vcpu->arch.cr0 = sregs->cr0;
2741 kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
2743 mmu_reset_needed |= vcpu->arch.cr4 != sregs->cr4;
2744 kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
2745 if (!is_long_mode(vcpu) && is_pae(vcpu))
2746 load_pdptrs(vcpu, vcpu->arch.cr3);
2748 if (mmu_reset_needed)
2749 kvm_mmu_reset_context(vcpu);
2751 if (!irqchip_in_kernel(vcpu->kvm)) {
2752 memcpy(vcpu->arch.irq_pending, sregs->interrupt_bitmap,
2753 sizeof vcpu->arch.irq_pending);
2754 vcpu->arch.irq_summary = 0;
2755 for (i = 0; i < ARRAY_SIZE(vcpu->arch.irq_pending); ++i)
2756 if (vcpu->arch.irq_pending[i])
2757 __set_bit(i, &vcpu->arch.irq_summary);
2759 max_bits = (sizeof sregs->interrupt_bitmap) << 3;
2760 pending_vec = find_first_bit(
2761 (const unsigned long *)sregs->interrupt_bitmap,
2763 /* Only pending external irq is handled here */
2764 if (pending_vec < max_bits) {
2765 kvm_x86_ops->set_irq(vcpu, pending_vec);
2766 pr_debug("Set back pending irq %d\n",
2771 set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
2772 set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
2773 set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
2774 set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
2775 set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
2776 set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
2778 set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
2779 set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
2786 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
2787 struct kvm_debug_guest *dbg)
2793 r = kvm_x86_ops->set_guest_debug(vcpu, dbg);
2801 * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
2802 * we have asm/x86/processor.h
2813 u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
2814 #ifdef CONFIG_X86_64
2815 u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
2817 u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
2822 * Translate a guest virtual address to a guest physical address.
2824 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
2825 struct kvm_translation *tr)
2827 unsigned long vaddr = tr->linear_address;
2831 mutex_lock(&vcpu->kvm->lock);
2832 gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, vaddr);
2833 tr->physical_address = gpa;
2834 tr->valid = gpa != UNMAPPED_GVA;
2837 mutex_unlock(&vcpu->kvm->lock);
2843 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2845 struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image;
2849 memcpy(fpu->fpr, fxsave->st_space, 128);
2850 fpu->fcw = fxsave->cwd;
2851 fpu->fsw = fxsave->swd;
2852 fpu->ftwx = fxsave->twd;
2853 fpu->last_opcode = fxsave->fop;
2854 fpu->last_ip = fxsave->rip;
2855 fpu->last_dp = fxsave->rdp;
2856 memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space);
2863 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2865 struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image;
2869 memcpy(fxsave->st_space, fpu->fpr, 128);
2870 fxsave->cwd = fpu->fcw;
2871 fxsave->swd = fpu->fsw;
2872 fxsave->twd = fpu->ftwx;
2873 fxsave->fop = fpu->last_opcode;
2874 fxsave->rip = fpu->last_ip;
2875 fxsave->rdp = fpu->last_dp;
2876 memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space);
2883 void fx_init(struct kvm_vcpu *vcpu)
2885 unsigned after_mxcsr_mask;
2887 /* Initialize guest FPU by resetting ours and saving into guest's */
2889 fx_save(&vcpu->arch.host_fx_image);
2891 fx_save(&vcpu->arch.guest_fx_image);
2892 fx_restore(&vcpu->arch.host_fx_image);
2895 vcpu->arch.cr0 |= X86_CR0_ET;
2896 after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space);
2897 vcpu->arch.guest_fx_image.mxcsr = 0x1f80;
2898 memset((void *)&vcpu->arch.guest_fx_image + after_mxcsr_mask,
2899 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask);
2901 EXPORT_SYMBOL_GPL(fx_init);
2903 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
2905 if (!vcpu->fpu_active || vcpu->guest_fpu_loaded)
2908 vcpu->guest_fpu_loaded = 1;
2909 fx_save(&vcpu->arch.host_fx_image);
2910 fx_restore(&vcpu->arch.guest_fx_image);
2912 EXPORT_SYMBOL_GPL(kvm_load_guest_fpu);
2914 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
2916 if (!vcpu->guest_fpu_loaded)
2919 vcpu->guest_fpu_loaded = 0;
2920 fx_save(&vcpu->arch.guest_fx_image);
2921 fx_restore(&vcpu->arch.host_fx_image);
2922 ++vcpu->stat.fpu_reload;
2924 EXPORT_SYMBOL_GPL(kvm_put_guest_fpu);
2926 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
2928 kvm_x86_ops->vcpu_free(vcpu);
2931 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
2934 return kvm_x86_ops->vcpu_create(kvm, id);
2937 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
2941 /* We do fxsave: this must be aligned. */
2942 BUG_ON((unsigned long)&vcpu->arch.host_fx_image & 0xF);
2945 r = kvm_arch_vcpu_reset(vcpu);
2947 r = kvm_mmu_setup(vcpu);
2954 kvm_x86_ops->vcpu_free(vcpu);
2958 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
2961 kvm_mmu_unload(vcpu);
2964 kvm_x86_ops->vcpu_free(vcpu);
2967 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu)
2969 return kvm_x86_ops->vcpu_reset(vcpu);
2972 void kvm_arch_hardware_enable(void *garbage)
2974 kvm_x86_ops->hardware_enable(garbage);
2977 void kvm_arch_hardware_disable(void *garbage)
2979 kvm_x86_ops->hardware_disable(garbage);
2982 int kvm_arch_hardware_setup(void)
2984 return kvm_x86_ops->hardware_setup();
2987 void kvm_arch_hardware_unsetup(void)
2989 kvm_x86_ops->hardware_unsetup();
2992 void kvm_arch_check_processor_compat(void *rtn)
2994 kvm_x86_ops->check_processor_compatibility(rtn);
2997 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
3003 BUG_ON(vcpu->kvm == NULL);
3006 vcpu->arch.mmu.root_hpa = INVALID_PAGE;
3007 if (!irqchip_in_kernel(kvm) || vcpu->vcpu_id == 0)
3008 vcpu->arch.mp_state = VCPU_MP_STATE_RUNNABLE;
3010 vcpu->arch.mp_state = VCPU_MP_STATE_UNINITIALIZED;
3012 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
3017 vcpu->arch.pio_data = page_address(page);
3019 r = kvm_mmu_create(vcpu);
3021 goto fail_free_pio_data;
3023 if (irqchip_in_kernel(kvm)) {
3024 r = kvm_create_lapic(vcpu);
3026 goto fail_mmu_destroy;
3032 kvm_mmu_destroy(vcpu);
3034 free_page((unsigned long)vcpu->arch.pio_data);
3039 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
3041 kvm_free_lapic(vcpu);
3042 kvm_mmu_destroy(vcpu);
3043 free_page((unsigned long)vcpu->arch.pio_data);
3046 struct kvm *kvm_arch_create_vm(void)
3048 struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
3051 return ERR_PTR(-ENOMEM);
3053 INIT_LIST_HEAD(&kvm->arch.active_mmu_pages);
3058 static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
3061 kvm_mmu_unload(vcpu);
3065 static void kvm_free_vcpus(struct kvm *kvm)
3070 * Unpin any mmu pages first.
3072 for (i = 0; i < KVM_MAX_VCPUS; ++i)
3074 kvm_unload_vcpu_mmu(kvm->vcpus[i]);
3075 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
3076 if (kvm->vcpus[i]) {
3077 kvm_arch_vcpu_free(kvm->vcpus[i]);
3078 kvm->vcpus[i] = NULL;
3084 void kvm_arch_destroy_vm(struct kvm *kvm)
3086 kfree(kvm->arch.vpic);
3087 kfree(kvm->arch.vioapic);
3088 kvm_free_vcpus(kvm);
3089 kvm_free_physmem(kvm);
3093 int kvm_arch_set_memory_region(struct kvm *kvm,
3094 struct kvm_userspace_memory_region *mem,
3095 struct kvm_memory_slot old,
3098 int npages = mem->memory_size >> PAGE_SHIFT;
3099 struct kvm_memory_slot *memslot = &kvm->memslots[mem->slot];
3101 /*To keep backward compatibility with older userspace,
3102 *x86 needs to hanlde !user_alloc case.
3105 if (npages && !old.rmap) {
3106 down_write(¤t->mm->mmap_sem);
3107 memslot->userspace_addr = do_mmap(NULL, 0,
3109 PROT_READ | PROT_WRITE,
3110 MAP_SHARED | MAP_ANONYMOUS,
3112 up_write(¤t->mm->mmap_sem);
3114 if (IS_ERR((void *)memslot->userspace_addr))
3115 return PTR_ERR((void *)memslot->userspace_addr);
3117 if (!old.user_alloc && old.rmap) {
3120 down_write(¤t->mm->mmap_sem);
3121 ret = do_munmap(current->mm, old.userspace_addr,
3122 old.npages * PAGE_SIZE);
3123 up_write(¤t->mm->mmap_sem);
3126 "kvm_vm_ioctl_set_memory_region: "
3127 "failed to munmap memory\n");
3132 if (!kvm->arch.n_requested_mmu_pages) {
3133 unsigned int nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm);
3134 kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages);
3137 kvm_mmu_slot_remove_write_access(kvm, mem->slot);
3138 kvm_flush_remote_tlbs(kvm);
3143 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
3145 return vcpu->arch.mp_state == VCPU_MP_STATE_RUNNABLE
3146 || vcpu->arch.mp_state == VCPU_MP_STATE_SIPI_RECEIVED;
3149 static void vcpu_kick_intr(void *info)
3152 struct kvm_vcpu *vcpu = (struct kvm_vcpu *)info;
3153 printk(KERN_DEBUG "vcpu_kick_intr %p \n", vcpu);
3157 void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
3159 int ipi_pcpu = vcpu->cpu;
3161 if (waitqueue_active(&vcpu->wq)) {
3162 wake_up_interruptible(&vcpu->wq);
3163 ++vcpu->stat.halt_wakeup;
3165 if (vcpu->guest_mode)
3166 smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0, 0);