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)
45 * - enable syscall per default because its emulated by KVM
46 * - enable LME and LMA per default on 64 bit KVM
49 static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffafeULL;
51 static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffffeULL;
54 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
55 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
57 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid,
58 struct kvm_cpuid_entry2 __user *entries);
60 struct kvm_x86_ops *kvm_x86_ops;
62 struct kvm_stats_debugfs_item debugfs_entries[] = {
63 { "pf_fixed", VCPU_STAT(pf_fixed) },
64 { "pf_guest", VCPU_STAT(pf_guest) },
65 { "tlb_flush", VCPU_STAT(tlb_flush) },
66 { "invlpg", VCPU_STAT(invlpg) },
67 { "exits", VCPU_STAT(exits) },
68 { "io_exits", VCPU_STAT(io_exits) },
69 { "mmio_exits", VCPU_STAT(mmio_exits) },
70 { "signal_exits", VCPU_STAT(signal_exits) },
71 { "irq_window", VCPU_STAT(irq_window_exits) },
72 { "halt_exits", VCPU_STAT(halt_exits) },
73 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
74 { "request_irq", VCPU_STAT(request_irq_exits) },
75 { "irq_exits", VCPU_STAT(irq_exits) },
76 { "host_state_reload", VCPU_STAT(host_state_reload) },
77 { "efer_reload", VCPU_STAT(efer_reload) },
78 { "fpu_reload", VCPU_STAT(fpu_reload) },
79 { "insn_emulation", VCPU_STAT(insn_emulation) },
80 { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) },
81 { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) },
82 { "mmu_pte_write", VM_STAT(mmu_pte_write) },
83 { "mmu_pte_updated", VM_STAT(mmu_pte_updated) },
84 { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) },
85 { "mmu_flooded", VM_STAT(mmu_flooded) },
86 { "mmu_recycled", VM_STAT(mmu_recycled) },
87 { "mmu_cache_miss", VM_STAT(mmu_cache_miss) },
88 { "remote_tlb_flush", VM_STAT(remote_tlb_flush) },
93 unsigned long segment_base(u16 selector)
95 struct descriptor_table gdt;
96 struct segment_descriptor *d;
97 unsigned long table_base;
103 asm("sgdt %0" : "=m"(gdt));
104 table_base = gdt.base;
106 if (selector & 4) { /* from ldt */
109 asm("sldt %0" : "=g"(ldt_selector));
110 table_base = segment_base(ldt_selector);
112 d = (struct segment_descriptor *)(table_base + (selector & ~7));
113 v = d->base_low | ((unsigned long)d->base_mid << 16) |
114 ((unsigned long)d->base_high << 24);
116 if (d->system == 0 && (d->type == 2 || d->type == 9 || d->type == 11))
117 v |= ((unsigned long) \
118 ((struct segment_descriptor_64 *)d)->base_higher) << 32;
122 EXPORT_SYMBOL_GPL(segment_base);
124 u64 kvm_get_apic_base(struct kvm_vcpu *vcpu)
126 if (irqchip_in_kernel(vcpu->kvm))
127 return vcpu->arch.apic_base;
129 return vcpu->arch.apic_base;
131 EXPORT_SYMBOL_GPL(kvm_get_apic_base);
133 void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data)
135 /* TODO: reserve bits check */
136 if (irqchip_in_kernel(vcpu->kvm))
137 kvm_lapic_set_base(vcpu, data);
139 vcpu->arch.apic_base = data;
141 EXPORT_SYMBOL_GPL(kvm_set_apic_base);
143 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr)
145 WARN_ON(vcpu->arch.exception.pending);
146 vcpu->arch.exception.pending = true;
147 vcpu->arch.exception.has_error_code = false;
148 vcpu->arch.exception.nr = nr;
150 EXPORT_SYMBOL_GPL(kvm_queue_exception);
152 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr,
155 ++vcpu->stat.pf_guest;
156 if (vcpu->arch.exception.pending && vcpu->arch.exception.nr == PF_VECTOR) {
157 printk(KERN_DEBUG "kvm: inject_page_fault:"
158 " double fault 0x%lx\n", addr);
159 vcpu->arch.exception.nr = DF_VECTOR;
160 vcpu->arch.exception.error_code = 0;
163 vcpu->arch.cr2 = addr;
164 kvm_queue_exception_e(vcpu, PF_VECTOR, error_code);
167 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code)
169 WARN_ON(vcpu->arch.exception.pending);
170 vcpu->arch.exception.pending = true;
171 vcpu->arch.exception.has_error_code = true;
172 vcpu->arch.exception.nr = nr;
173 vcpu->arch.exception.error_code = error_code;
175 EXPORT_SYMBOL_GPL(kvm_queue_exception_e);
177 static void __queue_exception(struct kvm_vcpu *vcpu)
179 kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr,
180 vcpu->arch.exception.has_error_code,
181 vcpu->arch.exception.error_code);
185 * Load the pae pdptrs. Return true is they are all valid.
187 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3)
189 gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT;
190 unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2;
193 u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)];
195 down_read(&vcpu->kvm->slots_lock);
196 ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte,
197 offset * sizeof(u64), sizeof(pdpte));
202 for (i = 0; i < ARRAY_SIZE(pdpte); ++i) {
203 if ((pdpte[i] & 1) && (pdpte[i] & 0xfffffff0000001e6ull)) {
210 memcpy(vcpu->arch.pdptrs, pdpte, sizeof(vcpu->arch.pdptrs));
212 up_read(&vcpu->kvm->slots_lock);
216 EXPORT_SYMBOL_GPL(load_pdptrs);
218 static bool pdptrs_changed(struct kvm_vcpu *vcpu)
220 u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)];
224 if (is_long_mode(vcpu) || !is_pae(vcpu))
227 down_read(&vcpu->kvm->slots_lock);
228 r = kvm_read_guest(vcpu->kvm, vcpu->arch.cr3 & ~31u, pdpte, sizeof(pdpte));
231 changed = memcmp(pdpte, vcpu->arch.pdptrs, sizeof(pdpte)) != 0;
233 up_read(&vcpu->kvm->slots_lock);
238 void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
240 if (cr0 & CR0_RESERVED_BITS) {
241 printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
242 cr0, vcpu->arch.cr0);
243 kvm_inject_gp(vcpu, 0);
247 if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) {
248 printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n");
249 kvm_inject_gp(vcpu, 0);
253 if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) {
254 printk(KERN_DEBUG "set_cr0: #GP, set PG flag "
255 "and a clear PE flag\n");
256 kvm_inject_gp(vcpu, 0);
260 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
262 if ((vcpu->arch.shadow_efer & EFER_LME)) {
266 printk(KERN_DEBUG "set_cr0: #GP, start paging "
267 "in long mode while PAE is disabled\n");
268 kvm_inject_gp(vcpu, 0);
271 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
273 printk(KERN_DEBUG "set_cr0: #GP, start paging "
274 "in long mode while CS.L == 1\n");
275 kvm_inject_gp(vcpu, 0);
281 if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.cr3)) {
282 printk(KERN_DEBUG "set_cr0: #GP, pdptrs "
284 kvm_inject_gp(vcpu, 0);
290 kvm_x86_ops->set_cr0(vcpu, cr0);
291 vcpu->arch.cr0 = cr0;
293 kvm_mmu_reset_context(vcpu);
296 EXPORT_SYMBOL_GPL(set_cr0);
298 void lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
300 set_cr0(vcpu, (vcpu->arch.cr0 & ~0x0ful) | (msw & 0x0f));
302 EXPORT_SYMBOL_GPL(lmsw);
304 void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
306 if (cr4 & CR4_RESERVED_BITS) {
307 printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n");
308 kvm_inject_gp(vcpu, 0);
312 if (is_long_mode(vcpu)) {
313 if (!(cr4 & X86_CR4_PAE)) {
314 printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while "
316 kvm_inject_gp(vcpu, 0);
319 } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & X86_CR4_PAE)
320 && !load_pdptrs(vcpu, vcpu->arch.cr3)) {
321 printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n");
322 kvm_inject_gp(vcpu, 0);
326 if (cr4 & X86_CR4_VMXE) {
327 printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n");
328 kvm_inject_gp(vcpu, 0);
331 kvm_x86_ops->set_cr4(vcpu, cr4);
332 vcpu->arch.cr4 = cr4;
333 kvm_mmu_reset_context(vcpu);
335 EXPORT_SYMBOL_GPL(set_cr4);
337 void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
339 if (cr3 == vcpu->arch.cr3 && !pdptrs_changed(vcpu)) {
340 kvm_mmu_flush_tlb(vcpu);
344 if (is_long_mode(vcpu)) {
345 if (cr3 & CR3_L_MODE_RESERVED_BITS) {
346 printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n");
347 kvm_inject_gp(vcpu, 0);
352 if (cr3 & CR3_PAE_RESERVED_BITS) {
354 "set_cr3: #GP, reserved bits\n");
355 kvm_inject_gp(vcpu, 0);
358 if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) {
359 printk(KERN_DEBUG "set_cr3: #GP, pdptrs "
361 kvm_inject_gp(vcpu, 0);
366 * We don't check reserved bits in nonpae mode, because
367 * this isn't enforced, and VMware depends on this.
371 down_read(&vcpu->kvm->slots_lock);
373 * Does the new cr3 value map to physical memory? (Note, we
374 * catch an invalid cr3 even in real-mode, because it would
375 * cause trouble later on when we turn on paging anyway.)
377 * A real CPU would silently accept an invalid cr3 and would
378 * attempt to use it - with largely undefined (and often hard
379 * to debug) behavior on the guest side.
381 if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT)))
382 kvm_inject_gp(vcpu, 0);
384 vcpu->arch.cr3 = cr3;
385 vcpu->arch.mmu.new_cr3(vcpu);
387 up_read(&vcpu->kvm->slots_lock);
389 EXPORT_SYMBOL_GPL(set_cr3);
391 void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
393 if (cr8 & CR8_RESERVED_BITS) {
394 printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8);
395 kvm_inject_gp(vcpu, 0);
398 if (irqchip_in_kernel(vcpu->kvm))
399 kvm_lapic_set_tpr(vcpu, cr8);
401 vcpu->arch.cr8 = cr8;
403 EXPORT_SYMBOL_GPL(set_cr8);
405 unsigned long get_cr8(struct kvm_vcpu *vcpu)
407 if (irqchip_in_kernel(vcpu->kvm))
408 return kvm_lapic_get_cr8(vcpu);
410 return vcpu->arch.cr8;
412 EXPORT_SYMBOL_GPL(get_cr8);
415 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
416 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
418 * This list is modified at module load time to reflect the
419 * capabilities of the host cpu.
421 static u32 msrs_to_save[] = {
422 MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
425 MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR,
427 MSR_IA32_TIME_STAMP_COUNTER,
430 static unsigned num_msrs_to_save;
432 static u32 emulated_msrs[] = {
433 MSR_IA32_MISC_ENABLE,
436 static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
438 if (efer & efer_reserved_bits) {
439 printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n",
441 kvm_inject_gp(vcpu, 0);
446 && (vcpu->arch.shadow_efer & EFER_LME) != (efer & EFER_LME)) {
447 printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n");
448 kvm_inject_gp(vcpu, 0);
452 kvm_x86_ops->set_efer(vcpu, efer);
455 efer |= vcpu->arch.shadow_efer & EFER_LMA;
457 vcpu->arch.shadow_efer = efer;
460 void kvm_enable_efer_bits(u64 mask)
462 efer_reserved_bits &= ~mask;
464 EXPORT_SYMBOL_GPL(kvm_enable_efer_bits);
468 * Writes msr value into into the appropriate "register".
469 * Returns 0 on success, non-0 otherwise.
470 * Assumes vcpu_load() was already called.
472 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
474 return kvm_x86_ops->set_msr(vcpu, msr_index, data);
478 * Adapt set_msr() to msr_io()'s calling convention
480 static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
482 return kvm_set_msr(vcpu, index, *data);
486 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
490 set_efer(vcpu, data);
492 case MSR_IA32_MC0_STATUS:
493 pr_unimpl(vcpu, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n",
496 case MSR_IA32_MCG_STATUS:
497 pr_unimpl(vcpu, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n",
500 case MSR_IA32_MCG_CTL:
501 pr_unimpl(vcpu, "%s: MSR_IA32_MCG_CTL 0x%llx, nop\n",
504 case MSR_IA32_UCODE_REV:
505 case MSR_IA32_UCODE_WRITE:
506 case 0x200 ... 0x2ff: /* MTRRs */
508 case MSR_IA32_APICBASE:
509 kvm_set_apic_base(vcpu, data);
511 case MSR_IA32_MISC_ENABLE:
512 vcpu->arch.ia32_misc_enable_msr = data;
515 pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", msr, data);
520 EXPORT_SYMBOL_GPL(kvm_set_msr_common);
524 * Reads an msr value (of 'msr_index') into 'pdata'.
525 * Returns 0 on success, non-0 otherwise.
526 * Assumes vcpu_load() was already called.
528 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
530 return kvm_x86_ops->get_msr(vcpu, msr_index, pdata);
533 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
538 case 0xc0010010: /* SYSCFG */
539 case 0xc0010015: /* HWCR */
540 case MSR_IA32_PLATFORM_ID:
541 case MSR_IA32_P5_MC_ADDR:
542 case MSR_IA32_P5_MC_TYPE:
543 case MSR_IA32_MC0_CTL:
544 case MSR_IA32_MCG_STATUS:
545 case MSR_IA32_MCG_CAP:
546 case MSR_IA32_MCG_CTL:
547 case MSR_IA32_MC0_MISC:
548 case MSR_IA32_MC0_MISC+4:
549 case MSR_IA32_MC0_MISC+8:
550 case MSR_IA32_MC0_MISC+12:
551 case MSR_IA32_MC0_MISC+16:
552 case MSR_IA32_UCODE_REV:
553 case MSR_IA32_PERF_STATUS:
554 case MSR_IA32_EBL_CR_POWERON:
557 case 0x200 ... 0x2ff:
560 case 0xcd: /* fsb frequency */
563 case MSR_IA32_APICBASE:
564 data = kvm_get_apic_base(vcpu);
566 case MSR_IA32_MISC_ENABLE:
567 data = vcpu->arch.ia32_misc_enable_msr;
570 data = vcpu->arch.shadow_efer;
573 pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr);
579 EXPORT_SYMBOL_GPL(kvm_get_msr_common);
582 * Read or write a bunch of msrs. All parameters are kernel addresses.
584 * @return number of msrs set successfully.
586 static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs,
587 struct kvm_msr_entry *entries,
588 int (*do_msr)(struct kvm_vcpu *vcpu,
589 unsigned index, u64 *data))
595 for (i = 0; i < msrs->nmsrs; ++i)
596 if (do_msr(vcpu, entries[i].index, &entries[i].data))
605 * Read or write a bunch of msrs. Parameters are user addresses.
607 * @return number of msrs set successfully.
609 static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs,
610 int (*do_msr)(struct kvm_vcpu *vcpu,
611 unsigned index, u64 *data),
614 struct kvm_msrs msrs;
615 struct kvm_msr_entry *entries;
620 if (copy_from_user(&msrs, user_msrs, sizeof msrs))
624 if (msrs.nmsrs >= MAX_IO_MSRS)
628 size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;
629 entries = vmalloc(size);
634 if (copy_from_user(entries, user_msrs->entries, size))
637 r = n = __msr_io(vcpu, &msrs, entries, do_msr);
642 if (writeback && copy_to_user(user_msrs->entries, entries, size))
654 * Make sure that a cpu that is being hot-unplugged does not have any vcpus
657 void decache_vcpus_on_cpu(int cpu)
660 struct kvm_vcpu *vcpu;
663 spin_lock(&kvm_lock);
664 list_for_each_entry(vm, &vm_list, vm_list)
665 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
670 * If the vcpu is locked, then it is running on some
671 * other cpu and therefore it is not cached on the
674 * If it's not locked, check the last cpu it executed
677 if (mutex_trylock(&vcpu->mutex)) {
678 if (vcpu->cpu == cpu) {
679 kvm_x86_ops->vcpu_decache(vcpu);
682 mutex_unlock(&vcpu->mutex);
685 spin_unlock(&kvm_lock);
688 int kvm_dev_ioctl_check_extension(long ext)
693 case KVM_CAP_IRQCHIP:
695 case KVM_CAP_MMU_SHADOW_CACHE_CONTROL:
696 case KVM_CAP_USER_MEMORY:
697 case KVM_CAP_SET_TSS_ADDR:
698 case KVM_CAP_EXT_CPUID:
702 r = !kvm_x86_ops->cpu_has_accelerated_tpr();
712 long kvm_arch_dev_ioctl(struct file *filp,
713 unsigned int ioctl, unsigned long arg)
715 void __user *argp = (void __user *)arg;
719 case KVM_GET_MSR_INDEX_LIST: {
720 struct kvm_msr_list __user *user_msr_list = argp;
721 struct kvm_msr_list msr_list;
725 if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list))
728 msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs);
729 if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list))
732 if (n < num_msrs_to_save)
735 if (copy_to_user(user_msr_list->indices, &msrs_to_save,
736 num_msrs_to_save * sizeof(u32)))
738 if (copy_to_user(user_msr_list->indices
739 + num_msrs_to_save * sizeof(u32),
741 ARRAY_SIZE(emulated_msrs) * sizeof(u32)))
746 case KVM_GET_SUPPORTED_CPUID: {
747 struct kvm_cpuid2 __user *cpuid_arg = argp;
748 struct kvm_cpuid2 cpuid;
751 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
753 r = kvm_dev_ioctl_get_supported_cpuid(&cpuid,
759 if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid))
771 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
773 kvm_x86_ops->vcpu_load(vcpu, cpu);
776 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
778 kvm_x86_ops->vcpu_put(vcpu);
779 kvm_put_guest_fpu(vcpu);
782 static int is_efer_nx(void)
786 rdmsrl(MSR_EFER, efer);
787 return efer & EFER_NX;
790 static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu)
793 struct kvm_cpuid_entry2 *e, *entry;
796 for (i = 0; i < vcpu->arch.cpuid_nent; ++i) {
797 e = &vcpu->arch.cpuid_entries[i];
798 if (e->function == 0x80000001) {
803 if (entry && (entry->edx & (1 << 20)) && !is_efer_nx()) {
804 entry->edx &= ~(1 << 20);
805 printk(KERN_INFO "kvm: guest NX capability removed\n");
809 /* when an old userspace process fills a new kernel module */
810 static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
811 struct kvm_cpuid *cpuid,
812 struct kvm_cpuid_entry __user *entries)
815 struct kvm_cpuid_entry *cpuid_entries;
818 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
821 cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry) * cpuid->nent);
825 if (copy_from_user(cpuid_entries, entries,
826 cpuid->nent * sizeof(struct kvm_cpuid_entry)))
828 for (i = 0; i < cpuid->nent; i++) {
829 vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function;
830 vcpu->arch.cpuid_entries[i].eax = cpuid_entries[i].eax;
831 vcpu->arch.cpuid_entries[i].ebx = cpuid_entries[i].ebx;
832 vcpu->arch.cpuid_entries[i].ecx = cpuid_entries[i].ecx;
833 vcpu->arch.cpuid_entries[i].edx = cpuid_entries[i].edx;
834 vcpu->arch.cpuid_entries[i].index = 0;
835 vcpu->arch.cpuid_entries[i].flags = 0;
836 vcpu->arch.cpuid_entries[i].padding[0] = 0;
837 vcpu->arch.cpuid_entries[i].padding[1] = 0;
838 vcpu->arch.cpuid_entries[i].padding[2] = 0;
840 vcpu->arch.cpuid_nent = cpuid->nent;
841 cpuid_fix_nx_cap(vcpu);
845 vfree(cpuid_entries);
850 static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu,
851 struct kvm_cpuid2 *cpuid,
852 struct kvm_cpuid_entry2 __user *entries)
857 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
860 if (copy_from_user(&vcpu->arch.cpuid_entries, entries,
861 cpuid->nent * sizeof(struct kvm_cpuid_entry2)))
863 vcpu->arch.cpuid_nent = cpuid->nent;
870 static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu,
871 struct kvm_cpuid2 *cpuid,
872 struct kvm_cpuid_entry2 __user *entries)
877 if (cpuid->nent < vcpu->arch.cpuid_nent)
880 if (copy_to_user(entries, &vcpu->arch.cpuid_entries,
881 vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2)))
886 cpuid->nent = vcpu->arch.cpuid_nent;
890 static inline u32 bit(int bitno)
892 return 1 << (bitno & 31);
895 static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function,
898 entry->function = function;
899 entry->index = index;
900 cpuid_count(entry->function, entry->index,
901 &entry->eax, &entry->ebx, &entry->ecx, &entry->edx);
905 static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
906 u32 index, int *nent, int maxnent)
908 const u32 kvm_supported_word0_x86_features = bit(X86_FEATURE_FPU) |
909 bit(X86_FEATURE_VME) | bit(X86_FEATURE_DE) |
910 bit(X86_FEATURE_PSE) | bit(X86_FEATURE_TSC) |
911 bit(X86_FEATURE_MSR) | bit(X86_FEATURE_PAE) |
912 bit(X86_FEATURE_CX8) | bit(X86_FEATURE_APIC) |
913 bit(X86_FEATURE_SEP) | bit(X86_FEATURE_PGE) |
914 bit(X86_FEATURE_CMOV) | bit(X86_FEATURE_PSE36) |
915 bit(X86_FEATURE_CLFLSH) | bit(X86_FEATURE_MMX) |
916 bit(X86_FEATURE_FXSR) | bit(X86_FEATURE_XMM) |
917 bit(X86_FEATURE_XMM2) | bit(X86_FEATURE_SELFSNOOP);
918 const u32 kvm_supported_word1_x86_features = bit(X86_FEATURE_FPU) |
919 bit(X86_FEATURE_VME) | bit(X86_FEATURE_DE) |
920 bit(X86_FEATURE_PSE) | bit(X86_FEATURE_TSC) |
921 bit(X86_FEATURE_MSR) | bit(X86_FEATURE_PAE) |
922 bit(X86_FEATURE_CX8) | bit(X86_FEATURE_APIC) |
923 bit(X86_FEATURE_PGE) |
924 bit(X86_FEATURE_CMOV) | bit(X86_FEATURE_PSE36) |
925 bit(X86_FEATURE_MMX) | bit(X86_FEATURE_FXSR) |
926 bit(X86_FEATURE_SYSCALL) |
927 (bit(X86_FEATURE_NX) && is_efer_nx()) |
929 bit(X86_FEATURE_LM) |
931 bit(X86_FEATURE_MMXEXT) |
932 bit(X86_FEATURE_3DNOWEXT) |
933 bit(X86_FEATURE_3DNOW);
934 const u32 kvm_supported_word3_x86_features =
935 bit(X86_FEATURE_XMM3) | bit(X86_FEATURE_CX16);
936 const u32 kvm_supported_word6_x86_features =
937 bit(X86_FEATURE_LAHF_LM) | bit(X86_FEATURE_CMP_LEGACY);
939 /* all func 2 cpuid_count() should be called on the same cpu */
941 do_cpuid_1_ent(entry, function, index);
946 entry->eax = min(entry->eax, (u32)0xb);
949 entry->edx &= kvm_supported_word0_x86_features;
950 entry->ecx &= kvm_supported_word3_x86_features;
952 /* function 2 entries are STATEFUL. That is, repeated cpuid commands
953 * may return different values. This forces us to get_cpu() before
954 * issuing the first command, and also to emulate this annoying behavior
955 * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */
957 int t, times = entry->eax & 0xff;
959 entry->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC;
960 for (t = 1; t < times && *nent < maxnent; ++t) {
961 do_cpuid_1_ent(&entry[t], function, 0);
962 entry[t].flags |= KVM_CPUID_FLAG_STATEFUL_FUNC;
967 /* function 4 and 0xb have additional index. */
969 int index, cache_type;
971 entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
972 /* read more entries until cache_type is zero */
973 for (index = 1; *nent < maxnent; ++index) {
974 cache_type = entry[index - 1].eax & 0x1f;
977 do_cpuid_1_ent(&entry[index], function, index);
978 entry[index].flags |=
979 KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
985 int index, level_type;
987 entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
988 /* read more entries until level_type is zero */
989 for (index = 1; *nent < maxnent; ++index) {
990 level_type = entry[index - 1].ecx & 0xff;
993 do_cpuid_1_ent(&entry[index], function, index);
994 entry[index].flags |=
995 KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
1001 entry->eax = min(entry->eax, 0x8000001a);
1004 entry->edx &= kvm_supported_word1_x86_features;
1005 entry->ecx &= kvm_supported_word6_x86_features;
1011 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid,
1012 struct kvm_cpuid_entry2 __user *entries)
1014 struct kvm_cpuid_entry2 *cpuid_entries;
1015 int limit, nent = 0, r = -E2BIG;
1018 if (cpuid->nent < 1)
1021 cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry2) * cpuid->nent);
1025 do_cpuid_ent(&cpuid_entries[0], 0, 0, &nent, cpuid->nent);
1026 limit = cpuid_entries[0].eax;
1027 for (func = 1; func <= limit && nent < cpuid->nent; ++func)
1028 do_cpuid_ent(&cpuid_entries[nent], func, 0,
1029 &nent, cpuid->nent);
1031 if (nent >= cpuid->nent)
1034 do_cpuid_ent(&cpuid_entries[nent], 0x80000000, 0, &nent, cpuid->nent);
1035 limit = cpuid_entries[nent - 1].eax;
1036 for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func)
1037 do_cpuid_ent(&cpuid_entries[nent], func, 0,
1038 &nent, cpuid->nent);
1040 if (copy_to_user(entries, cpuid_entries,
1041 nent * sizeof(struct kvm_cpuid_entry2)))
1047 vfree(cpuid_entries);
1052 static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu,
1053 struct kvm_lapic_state *s)
1056 memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s);
1062 static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu,
1063 struct kvm_lapic_state *s)
1066 memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s);
1067 kvm_apic_post_state_restore(vcpu);
1073 static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
1074 struct kvm_interrupt *irq)
1076 if (irq->irq < 0 || irq->irq >= 256)
1078 if (irqchip_in_kernel(vcpu->kvm))
1082 set_bit(irq->irq, vcpu->arch.irq_pending);
1083 set_bit(irq->irq / BITS_PER_LONG, &vcpu->arch.irq_summary);
1090 static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu,
1091 struct kvm_tpr_access_ctl *tac)
1095 vcpu->arch.tpr_access_reporting = !!tac->enabled;
1099 long kvm_arch_vcpu_ioctl(struct file *filp,
1100 unsigned int ioctl, unsigned long arg)
1102 struct kvm_vcpu *vcpu = filp->private_data;
1103 void __user *argp = (void __user *)arg;
1107 case KVM_GET_LAPIC: {
1108 struct kvm_lapic_state lapic;
1110 memset(&lapic, 0, sizeof lapic);
1111 r = kvm_vcpu_ioctl_get_lapic(vcpu, &lapic);
1115 if (copy_to_user(argp, &lapic, sizeof lapic))
1120 case KVM_SET_LAPIC: {
1121 struct kvm_lapic_state lapic;
1124 if (copy_from_user(&lapic, argp, sizeof lapic))
1126 r = kvm_vcpu_ioctl_set_lapic(vcpu, &lapic);;
1132 case KVM_INTERRUPT: {
1133 struct kvm_interrupt irq;
1136 if (copy_from_user(&irq, argp, sizeof irq))
1138 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
1144 case KVM_SET_CPUID: {
1145 struct kvm_cpuid __user *cpuid_arg = argp;
1146 struct kvm_cpuid cpuid;
1149 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
1151 r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries);
1156 case KVM_SET_CPUID2: {
1157 struct kvm_cpuid2 __user *cpuid_arg = argp;
1158 struct kvm_cpuid2 cpuid;
1161 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
1163 r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid,
1164 cpuid_arg->entries);
1169 case KVM_GET_CPUID2: {
1170 struct kvm_cpuid2 __user *cpuid_arg = argp;
1171 struct kvm_cpuid2 cpuid;
1174 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
1176 r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid,
1177 cpuid_arg->entries);
1181 if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid))
1187 r = msr_io(vcpu, argp, kvm_get_msr, 1);
1190 r = msr_io(vcpu, argp, do_set_msr, 0);
1192 case KVM_TPR_ACCESS_REPORTING: {
1193 struct kvm_tpr_access_ctl tac;
1196 if (copy_from_user(&tac, argp, sizeof tac))
1198 r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac);
1202 if (copy_to_user(argp, &tac, sizeof tac))
1207 case KVM_SET_VAPIC_ADDR: {
1208 struct kvm_vapic_addr va;
1211 if (!irqchip_in_kernel(vcpu->kvm))
1214 if (copy_from_user(&va, argp, sizeof va))
1217 kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr);
1227 static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr)
1231 if (addr > (unsigned int)(-3 * PAGE_SIZE))
1233 ret = kvm_x86_ops->set_tss_addr(kvm, addr);
1237 static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm,
1238 u32 kvm_nr_mmu_pages)
1240 if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES)
1243 down_write(&kvm->slots_lock);
1245 kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages);
1246 kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages;
1248 up_write(&kvm->slots_lock);
1252 static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm)
1254 return kvm->arch.n_alloc_mmu_pages;
1257 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
1260 struct kvm_mem_alias *alias;
1262 for (i = 0; i < kvm->arch.naliases; ++i) {
1263 alias = &kvm->arch.aliases[i];
1264 if (gfn >= alias->base_gfn
1265 && gfn < alias->base_gfn + alias->npages)
1266 return alias->target_gfn + gfn - alias->base_gfn;
1272 * Set a new alias region. Aliases map a portion of physical memory into
1273 * another portion. This is useful for memory windows, for example the PC
1276 static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm,
1277 struct kvm_memory_alias *alias)
1280 struct kvm_mem_alias *p;
1283 /* General sanity checks */
1284 if (alias->memory_size & (PAGE_SIZE - 1))
1286 if (alias->guest_phys_addr & (PAGE_SIZE - 1))
1288 if (alias->slot >= KVM_ALIAS_SLOTS)
1290 if (alias->guest_phys_addr + alias->memory_size
1291 < alias->guest_phys_addr)
1293 if (alias->target_phys_addr + alias->memory_size
1294 < alias->target_phys_addr)
1297 down_write(&kvm->slots_lock);
1299 p = &kvm->arch.aliases[alias->slot];
1300 p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT;
1301 p->npages = alias->memory_size >> PAGE_SHIFT;
1302 p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT;
1304 for (n = KVM_ALIAS_SLOTS; n > 0; --n)
1305 if (kvm->arch.aliases[n - 1].npages)
1307 kvm->arch.naliases = n;
1309 kvm_mmu_zap_all(kvm);
1311 up_write(&kvm->slots_lock);
1319 static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
1324 switch (chip->chip_id) {
1325 case KVM_IRQCHIP_PIC_MASTER:
1326 memcpy(&chip->chip.pic,
1327 &pic_irqchip(kvm)->pics[0],
1328 sizeof(struct kvm_pic_state));
1330 case KVM_IRQCHIP_PIC_SLAVE:
1331 memcpy(&chip->chip.pic,
1332 &pic_irqchip(kvm)->pics[1],
1333 sizeof(struct kvm_pic_state));
1335 case KVM_IRQCHIP_IOAPIC:
1336 memcpy(&chip->chip.ioapic,
1337 ioapic_irqchip(kvm),
1338 sizeof(struct kvm_ioapic_state));
1347 static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
1352 switch (chip->chip_id) {
1353 case KVM_IRQCHIP_PIC_MASTER:
1354 memcpy(&pic_irqchip(kvm)->pics[0],
1356 sizeof(struct kvm_pic_state));
1358 case KVM_IRQCHIP_PIC_SLAVE:
1359 memcpy(&pic_irqchip(kvm)->pics[1],
1361 sizeof(struct kvm_pic_state));
1363 case KVM_IRQCHIP_IOAPIC:
1364 memcpy(ioapic_irqchip(kvm),
1366 sizeof(struct kvm_ioapic_state));
1372 kvm_pic_update_irq(pic_irqchip(kvm));
1377 * Get (and clear) the dirty memory log for a memory slot.
1379 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
1380 struct kvm_dirty_log *log)
1384 struct kvm_memory_slot *memslot;
1387 down_write(&kvm->slots_lock);
1389 r = kvm_get_dirty_log(kvm, log, &is_dirty);
1393 /* If nothing is dirty, don't bother messing with page tables. */
1395 kvm_mmu_slot_remove_write_access(kvm, log->slot);
1396 kvm_flush_remote_tlbs(kvm);
1397 memslot = &kvm->memslots[log->slot];
1398 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
1399 memset(memslot->dirty_bitmap, 0, n);
1403 up_write(&kvm->slots_lock);
1407 long kvm_arch_vm_ioctl(struct file *filp,
1408 unsigned int ioctl, unsigned long arg)
1410 struct kvm *kvm = filp->private_data;
1411 void __user *argp = (void __user *)arg;
1415 case KVM_SET_TSS_ADDR:
1416 r = kvm_vm_ioctl_set_tss_addr(kvm, arg);
1420 case KVM_SET_MEMORY_REGION: {
1421 struct kvm_memory_region kvm_mem;
1422 struct kvm_userspace_memory_region kvm_userspace_mem;
1425 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
1427 kvm_userspace_mem.slot = kvm_mem.slot;
1428 kvm_userspace_mem.flags = kvm_mem.flags;
1429 kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr;
1430 kvm_userspace_mem.memory_size = kvm_mem.memory_size;
1431 r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0);
1436 case KVM_SET_NR_MMU_PAGES:
1437 r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg);
1441 case KVM_GET_NR_MMU_PAGES:
1442 r = kvm_vm_ioctl_get_nr_mmu_pages(kvm);
1444 case KVM_SET_MEMORY_ALIAS: {
1445 struct kvm_memory_alias alias;
1448 if (copy_from_user(&alias, argp, sizeof alias))
1450 r = kvm_vm_ioctl_set_memory_alias(kvm, &alias);
1455 case KVM_CREATE_IRQCHIP:
1457 kvm->arch.vpic = kvm_create_pic(kvm);
1458 if (kvm->arch.vpic) {
1459 r = kvm_ioapic_init(kvm);
1461 kfree(kvm->arch.vpic);
1462 kvm->arch.vpic = NULL;
1468 case KVM_IRQ_LINE: {
1469 struct kvm_irq_level irq_event;
1472 if (copy_from_user(&irq_event, argp, sizeof irq_event))
1474 if (irqchip_in_kernel(kvm)) {
1475 mutex_lock(&kvm->lock);
1476 if (irq_event.irq < 16)
1477 kvm_pic_set_irq(pic_irqchip(kvm),
1480 kvm_ioapic_set_irq(kvm->arch.vioapic,
1483 mutex_unlock(&kvm->lock);
1488 case KVM_GET_IRQCHIP: {
1489 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1490 struct kvm_irqchip chip;
1493 if (copy_from_user(&chip, argp, sizeof chip))
1496 if (!irqchip_in_kernel(kvm))
1498 r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
1502 if (copy_to_user(argp, &chip, sizeof chip))
1507 case KVM_SET_IRQCHIP: {
1508 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1509 struct kvm_irqchip chip;
1512 if (copy_from_user(&chip, argp, sizeof chip))
1515 if (!irqchip_in_kernel(kvm))
1517 r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
1530 static void kvm_init_msr_list(void)
1535 for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) {
1536 if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0)
1539 msrs_to_save[j] = msrs_to_save[i];
1542 num_msrs_to_save = j;
1546 * Only apic need an MMIO device hook, so shortcut now..
1548 static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu,
1551 struct kvm_io_device *dev;
1553 if (vcpu->arch.apic) {
1554 dev = &vcpu->arch.apic->dev;
1555 if (dev->in_range(dev, addr))
1562 static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu,
1565 struct kvm_io_device *dev;
1567 dev = vcpu_find_pervcpu_dev(vcpu, addr);
1569 dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr);
1573 int emulator_read_std(unsigned long addr,
1576 struct kvm_vcpu *vcpu)
1579 int r = X86EMUL_CONTINUE;
1581 down_read(&vcpu->kvm->slots_lock);
1583 gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr);
1584 unsigned offset = addr & (PAGE_SIZE-1);
1585 unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset);
1588 if (gpa == UNMAPPED_GVA) {
1589 r = X86EMUL_PROPAGATE_FAULT;
1592 ret = kvm_read_guest(vcpu->kvm, gpa, data, tocopy);
1594 r = X86EMUL_UNHANDLEABLE;
1603 up_read(&vcpu->kvm->slots_lock);
1606 EXPORT_SYMBOL_GPL(emulator_read_std);
1608 static int emulator_read_emulated(unsigned long addr,
1611 struct kvm_vcpu *vcpu)
1613 struct kvm_io_device *mmio_dev;
1616 if (vcpu->mmio_read_completed) {
1617 memcpy(val, vcpu->mmio_data, bytes);
1618 vcpu->mmio_read_completed = 0;
1619 return X86EMUL_CONTINUE;
1622 down_read(&vcpu->kvm->slots_lock);
1623 gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr);
1624 up_read(&vcpu->kvm->slots_lock);
1626 /* For APIC access vmexit */
1627 if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
1630 if (emulator_read_std(addr, val, bytes, vcpu)
1631 == X86EMUL_CONTINUE)
1632 return X86EMUL_CONTINUE;
1633 if (gpa == UNMAPPED_GVA)
1634 return X86EMUL_PROPAGATE_FAULT;
1638 * Is this MMIO handled locally?
1640 mutex_lock(&vcpu->kvm->lock);
1641 mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1643 kvm_iodevice_read(mmio_dev, gpa, bytes, val);
1644 mutex_unlock(&vcpu->kvm->lock);
1645 return X86EMUL_CONTINUE;
1647 mutex_unlock(&vcpu->kvm->lock);
1649 vcpu->mmio_needed = 1;
1650 vcpu->mmio_phys_addr = gpa;
1651 vcpu->mmio_size = bytes;
1652 vcpu->mmio_is_write = 0;
1654 return X86EMUL_UNHANDLEABLE;
1657 static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
1658 const void *val, int bytes)
1662 down_read(&vcpu->kvm->slots_lock);
1663 ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes);
1665 up_read(&vcpu->kvm->slots_lock);
1668 kvm_mmu_pte_write(vcpu, gpa, val, bytes);
1669 up_read(&vcpu->kvm->slots_lock);
1673 static int emulator_write_emulated_onepage(unsigned long addr,
1676 struct kvm_vcpu *vcpu)
1678 struct kvm_io_device *mmio_dev;
1681 down_read(&vcpu->kvm->slots_lock);
1682 gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr);
1683 up_read(&vcpu->kvm->slots_lock);
1685 if (gpa == UNMAPPED_GVA) {
1686 kvm_inject_page_fault(vcpu, addr, 2);
1687 return X86EMUL_PROPAGATE_FAULT;
1690 /* For APIC access vmexit */
1691 if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
1694 if (emulator_write_phys(vcpu, gpa, val, bytes))
1695 return X86EMUL_CONTINUE;
1699 * Is this MMIO handled locally?
1701 mutex_lock(&vcpu->kvm->lock);
1702 mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1704 kvm_iodevice_write(mmio_dev, gpa, bytes, val);
1705 mutex_unlock(&vcpu->kvm->lock);
1706 return X86EMUL_CONTINUE;
1708 mutex_unlock(&vcpu->kvm->lock);
1710 vcpu->mmio_needed = 1;
1711 vcpu->mmio_phys_addr = gpa;
1712 vcpu->mmio_size = bytes;
1713 vcpu->mmio_is_write = 1;
1714 memcpy(vcpu->mmio_data, val, bytes);
1716 return X86EMUL_CONTINUE;
1719 int emulator_write_emulated(unsigned long addr,
1722 struct kvm_vcpu *vcpu)
1724 /* Crossing a page boundary? */
1725 if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
1728 now = -addr & ~PAGE_MASK;
1729 rc = emulator_write_emulated_onepage(addr, val, now, vcpu);
1730 if (rc != X86EMUL_CONTINUE)
1736 return emulator_write_emulated_onepage(addr, val, bytes, vcpu);
1738 EXPORT_SYMBOL_GPL(emulator_write_emulated);
1740 static int emulator_cmpxchg_emulated(unsigned long addr,
1744 struct kvm_vcpu *vcpu)
1746 static int reported;
1750 printk(KERN_WARNING "kvm: emulating exchange as write\n");
1752 #ifndef CONFIG_X86_64
1753 /* guests cmpxchg8b have to be emulated atomically */
1760 down_read(&vcpu->kvm->slots_lock);
1761 gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr);
1763 if (gpa == UNMAPPED_GVA ||
1764 (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
1767 if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK))
1772 down_read(¤t->mm->mmap_sem);
1773 page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT);
1774 up_read(¤t->mm->mmap_sem);
1776 kaddr = kmap_atomic(page, KM_USER0);
1777 set_64bit((u64 *)(kaddr + offset_in_page(gpa)), val);
1778 kunmap_atomic(kaddr, KM_USER0);
1779 kvm_release_page_dirty(page);
1781 up_read(&vcpu->kvm->slots_lock);
1785 return emulator_write_emulated(addr, new, bytes, vcpu);
1788 static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)
1790 return kvm_x86_ops->get_segment_base(vcpu, seg);
1793 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address)
1795 return X86EMUL_CONTINUE;
1798 int emulate_clts(struct kvm_vcpu *vcpu)
1800 kvm_x86_ops->set_cr0(vcpu, vcpu->arch.cr0 & ~X86_CR0_TS);
1801 return X86EMUL_CONTINUE;
1804 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest)
1806 struct kvm_vcpu *vcpu = ctxt->vcpu;
1810 *dest = kvm_x86_ops->get_dr(vcpu, dr);
1811 return X86EMUL_CONTINUE;
1813 pr_unimpl(vcpu, "%s: unexpected dr %u\n", __FUNCTION__, dr);
1814 return X86EMUL_UNHANDLEABLE;
1818 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
1820 unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U;
1823 kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception);
1825 /* FIXME: better handling */
1826 return X86EMUL_UNHANDLEABLE;
1828 return X86EMUL_CONTINUE;
1831 void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context)
1833 static int reported;
1835 unsigned long rip = vcpu->arch.rip;
1836 unsigned long rip_linear;
1838 rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS);
1843 emulator_read_std(rip_linear, (void *)opcodes, 4, vcpu);
1845 printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
1846 context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]);
1849 EXPORT_SYMBOL_GPL(kvm_report_emulation_failure);
1851 struct x86_emulate_ops emulate_ops = {
1852 .read_std = emulator_read_std,
1853 .read_emulated = emulator_read_emulated,
1854 .write_emulated = emulator_write_emulated,
1855 .cmpxchg_emulated = emulator_cmpxchg_emulated,
1858 int emulate_instruction(struct kvm_vcpu *vcpu,
1859 struct kvm_run *run,
1865 struct decode_cache *c;
1867 vcpu->arch.mmio_fault_cr2 = cr2;
1868 kvm_x86_ops->cache_regs(vcpu);
1870 vcpu->mmio_is_write = 0;
1871 vcpu->arch.pio.string = 0;
1873 if (!(emulation_type & EMULTYPE_NO_DECODE)) {
1875 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
1877 vcpu->arch.emulate_ctxt.vcpu = vcpu;
1878 vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu);
1879 vcpu->arch.emulate_ctxt.mode =
1880 (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM)
1881 ? X86EMUL_MODE_REAL : cs_l
1882 ? X86EMUL_MODE_PROT64 : cs_db
1883 ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
1885 if (vcpu->arch.emulate_ctxt.mode == X86EMUL_MODE_PROT64) {
1886 vcpu->arch.emulate_ctxt.cs_base = 0;
1887 vcpu->arch.emulate_ctxt.ds_base = 0;
1888 vcpu->arch.emulate_ctxt.es_base = 0;
1889 vcpu->arch.emulate_ctxt.ss_base = 0;
1891 vcpu->arch.emulate_ctxt.cs_base =
1892 get_segment_base(vcpu, VCPU_SREG_CS);
1893 vcpu->arch.emulate_ctxt.ds_base =
1894 get_segment_base(vcpu, VCPU_SREG_DS);
1895 vcpu->arch.emulate_ctxt.es_base =
1896 get_segment_base(vcpu, VCPU_SREG_ES);
1897 vcpu->arch.emulate_ctxt.ss_base =
1898 get_segment_base(vcpu, VCPU_SREG_SS);
1901 vcpu->arch.emulate_ctxt.gs_base =
1902 get_segment_base(vcpu, VCPU_SREG_GS);
1903 vcpu->arch.emulate_ctxt.fs_base =
1904 get_segment_base(vcpu, VCPU_SREG_FS);
1906 r = x86_decode_insn(&vcpu->arch.emulate_ctxt, &emulate_ops);
1908 /* Reject the instructions other than VMCALL/VMMCALL when
1909 * try to emulate invalid opcode */
1910 c = &vcpu->arch.emulate_ctxt.decode;
1911 if ((emulation_type & EMULTYPE_TRAP_UD) &&
1912 (!(c->twobyte && c->b == 0x01 &&
1913 (c->modrm_reg == 0 || c->modrm_reg == 3) &&
1914 c->modrm_mod == 3 && c->modrm_rm == 1)))
1915 return EMULATE_FAIL;
1917 ++vcpu->stat.insn_emulation;
1919 ++vcpu->stat.insn_emulation_fail;
1920 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
1921 return EMULATE_DONE;
1922 return EMULATE_FAIL;
1926 r = x86_emulate_insn(&vcpu->arch.emulate_ctxt, &emulate_ops);
1928 if (vcpu->arch.pio.string)
1929 return EMULATE_DO_MMIO;
1931 if ((r || vcpu->mmio_is_write) && run) {
1932 run->exit_reason = KVM_EXIT_MMIO;
1933 run->mmio.phys_addr = vcpu->mmio_phys_addr;
1934 memcpy(run->mmio.data, vcpu->mmio_data, 8);
1935 run->mmio.len = vcpu->mmio_size;
1936 run->mmio.is_write = vcpu->mmio_is_write;
1940 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
1941 return EMULATE_DONE;
1942 if (!vcpu->mmio_needed) {
1943 kvm_report_emulation_failure(vcpu, "mmio");
1944 return EMULATE_FAIL;
1946 return EMULATE_DO_MMIO;
1949 kvm_x86_ops->decache_regs(vcpu);
1950 kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags);
1952 if (vcpu->mmio_is_write) {
1953 vcpu->mmio_needed = 0;
1954 return EMULATE_DO_MMIO;
1957 return EMULATE_DONE;
1959 EXPORT_SYMBOL_GPL(emulate_instruction);
1961 static void free_pio_guest_pages(struct kvm_vcpu *vcpu)
1965 for (i = 0; i < ARRAY_SIZE(vcpu->arch.pio.guest_pages); ++i)
1966 if (vcpu->arch.pio.guest_pages[i]) {
1967 kvm_release_page_dirty(vcpu->arch.pio.guest_pages[i]);
1968 vcpu->arch.pio.guest_pages[i] = NULL;
1972 static int pio_copy_data(struct kvm_vcpu *vcpu)
1974 void *p = vcpu->arch.pio_data;
1977 int nr_pages = vcpu->arch.pio.guest_pages[1] ? 2 : 1;
1979 q = vmap(vcpu->arch.pio.guest_pages, nr_pages, VM_READ|VM_WRITE,
1982 free_pio_guest_pages(vcpu);
1985 q += vcpu->arch.pio.guest_page_offset;
1986 bytes = vcpu->arch.pio.size * vcpu->arch.pio.cur_count;
1987 if (vcpu->arch.pio.in)
1988 memcpy(q, p, bytes);
1990 memcpy(p, q, bytes);
1991 q -= vcpu->arch.pio.guest_page_offset;
1993 free_pio_guest_pages(vcpu);
1997 int complete_pio(struct kvm_vcpu *vcpu)
1999 struct kvm_pio_request *io = &vcpu->arch.pio;
2003 kvm_x86_ops->cache_regs(vcpu);
2007 memcpy(&vcpu->arch.regs[VCPU_REGS_RAX], vcpu->arch.pio_data,
2011 r = pio_copy_data(vcpu);
2013 kvm_x86_ops->cache_regs(vcpu);
2020 delta *= io->cur_count;
2022 * The size of the register should really depend on
2023 * current address size.
2025 vcpu->arch.regs[VCPU_REGS_RCX] -= delta;
2031 vcpu->arch.regs[VCPU_REGS_RDI] += delta;
2033 vcpu->arch.regs[VCPU_REGS_RSI] += delta;
2036 kvm_x86_ops->decache_regs(vcpu);
2038 io->count -= io->cur_count;
2044 static void kernel_pio(struct kvm_io_device *pio_dev,
2045 struct kvm_vcpu *vcpu,
2048 /* TODO: String I/O for in kernel device */
2050 mutex_lock(&vcpu->kvm->lock);
2051 if (vcpu->arch.pio.in)
2052 kvm_iodevice_read(pio_dev, vcpu->arch.pio.port,
2053 vcpu->arch.pio.size,
2056 kvm_iodevice_write(pio_dev, vcpu->arch.pio.port,
2057 vcpu->arch.pio.size,
2059 mutex_unlock(&vcpu->kvm->lock);
2062 static void pio_string_write(struct kvm_io_device *pio_dev,
2063 struct kvm_vcpu *vcpu)
2065 struct kvm_pio_request *io = &vcpu->arch.pio;
2066 void *pd = vcpu->arch.pio_data;
2069 mutex_lock(&vcpu->kvm->lock);
2070 for (i = 0; i < io->cur_count; i++) {
2071 kvm_iodevice_write(pio_dev, io->port,
2076 mutex_unlock(&vcpu->kvm->lock);
2079 static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu,
2082 return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr);
2085 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
2086 int size, unsigned port)
2088 struct kvm_io_device *pio_dev;
2090 vcpu->run->exit_reason = KVM_EXIT_IO;
2091 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
2092 vcpu->run->io.size = vcpu->arch.pio.size = size;
2093 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
2094 vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = 1;
2095 vcpu->run->io.port = vcpu->arch.pio.port = port;
2096 vcpu->arch.pio.in = in;
2097 vcpu->arch.pio.string = 0;
2098 vcpu->arch.pio.down = 0;
2099 vcpu->arch.pio.guest_page_offset = 0;
2100 vcpu->arch.pio.rep = 0;
2102 kvm_x86_ops->cache_regs(vcpu);
2103 memcpy(vcpu->arch.pio_data, &vcpu->arch.regs[VCPU_REGS_RAX], 4);
2104 kvm_x86_ops->decache_regs(vcpu);
2106 kvm_x86_ops->skip_emulated_instruction(vcpu);
2108 pio_dev = vcpu_find_pio_dev(vcpu, port);
2110 kernel_pio(pio_dev, vcpu, vcpu->arch.pio_data);
2116 EXPORT_SYMBOL_GPL(kvm_emulate_pio);
2118 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
2119 int size, unsigned long count, int down,
2120 gva_t address, int rep, unsigned port)
2122 unsigned now, in_page;
2126 struct kvm_io_device *pio_dev;
2128 vcpu->run->exit_reason = KVM_EXIT_IO;
2129 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
2130 vcpu->run->io.size = vcpu->arch.pio.size = size;
2131 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
2132 vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = count;
2133 vcpu->run->io.port = vcpu->arch.pio.port = port;
2134 vcpu->arch.pio.in = in;
2135 vcpu->arch.pio.string = 1;
2136 vcpu->arch.pio.down = down;
2137 vcpu->arch.pio.guest_page_offset = offset_in_page(address);
2138 vcpu->arch.pio.rep = rep;
2141 kvm_x86_ops->skip_emulated_instruction(vcpu);
2146 in_page = PAGE_SIZE - offset_in_page(address);
2148 in_page = offset_in_page(address) + size;
2149 now = min(count, (unsigned long)in_page / size);
2152 * String I/O straddles page boundary. Pin two guest pages
2153 * so that we satisfy atomicity constraints. Do just one
2154 * transaction to avoid complexity.
2161 * String I/O in reverse. Yuck. Kill the guest, fix later.
2163 pr_unimpl(vcpu, "guest string pio down\n");
2164 kvm_inject_gp(vcpu, 0);
2167 vcpu->run->io.count = now;
2168 vcpu->arch.pio.cur_count = now;
2170 if (vcpu->arch.pio.cur_count == vcpu->arch.pio.count)
2171 kvm_x86_ops->skip_emulated_instruction(vcpu);
2173 for (i = 0; i < nr_pages; ++i) {
2174 down_read(&vcpu->kvm->slots_lock);
2175 page = gva_to_page(vcpu, address + i * PAGE_SIZE);
2176 vcpu->arch.pio.guest_pages[i] = page;
2177 up_read(&vcpu->kvm->slots_lock);
2179 kvm_inject_gp(vcpu, 0);
2180 free_pio_guest_pages(vcpu);
2185 pio_dev = vcpu_find_pio_dev(vcpu, port);
2186 if (!vcpu->arch.pio.in) {
2187 /* string PIO write */
2188 ret = pio_copy_data(vcpu);
2189 if (ret >= 0 && pio_dev) {
2190 pio_string_write(pio_dev, vcpu);
2192 if (vcpu->arch.pio.count == 0)
2196 pr_unimpl(vcpu, "no string pio read support yet, "
2197 "port %x size %d count %ld\n",
2202 EXPORT_SYMBOL_GPL(kvm_emulate_pio_string);
2204 int kvm_arch_init(void *opaque)
2207 struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque;
2210 printk(KERN_ERR "kvm: already loaded the other module\n");
2215 if (!ops->cpu_has_kvm_support()) {
2216 printk(KERN_ERR "kvm: no hardware support\n");
2220 if (ops->disabled_by_bios()) {
2221 printk(KERN_ERR "kvm: disabled by bios\n");
2226 r = kvm_mmu_module_init();
2230 kvm_init_msr_list();
2233 kvm_mmu_set_nonpresent_ptes(0ull, 0ull);
2240 void kvm_arch_exit(void)
2243 kvm_mmu_module_exit();
2246 int kvm_emulate_halt(struct kvm_vcpu *vcpu)
2248 ++vcpu->stat.halt_exits;
2249 if (irqchip_in_kernel(vcpu->kvm)) {
2250 vcpu->arch.mp_state = VCPU_MP_STATE_HALTED;
2251 kvm_vcpu_block(vcpu);
2252 if (vcpu->arch.mp_state != VCPU_MP_STATE_RUNNABLE)
2256 vcpu->run->exit_reason = KVM_EXIT_HLT;
2260 EXPORT_SYMBOL_GPL(kvm_emulate_halt);
2262 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
2264 unsigned long nr, a0, a1, a2, a3, ret;
2266 kvm_x86_ops->cache_regs(vcpu);
2268 nr = vcpu->arch.regs[VCPU_REGS_RAX];
2269 a0 = vcpu->arch.regs[VCPU_REGS_RBX];
2270 a1 = vcpu->arch.regs[VCPU_REGS_RCX];
2271 a2 = vcpu->arch.regs[VCPU_REGS_RDX];
2272 a3 = vcpu->arch.regs[VCPU_REGS_RSI];
2274 if (!is_long_mode(vcpu)) {
2283 case KVM_HC_VAPIC_POLL_IRQ:
2290 vcpu->arch.regs[VCPU_REGS_RAX] = ret;
2291 kvm_x86_ops->decache_regs(vcpu);
2294 EXPORT_SYMBOL_GPL(kvm_emulate_hypercall);
2296 int kvm_fix_hypercall(struct kvm_vcpu *vcpu)
2298 char instruction[3];
2303 * Blow out the MMU to ensure that no other VCPU has an active mapping
2304 * to ensure that the updated hypercall appears atomically across all
2307 kvm_mmu_zap_all(vcpu->kvm);
2309 kvm_x86_ops->cache_regs(vcpu);
2310 kvm_x86_ops->patch_hypercall(vcpu, instruction);
2311 if (emulator_write_emulated(vcpu->arch.rip, instruction, 3, vcpu)
2312 != X86EMUL_CONTINUE)
2318 static u64 mk_cr_64(u64 curr_cr, u32 new_val)
2320 return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
2323 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
2325 struct descriptor_table dt = { limit, base };
2327 kvm_x86_ops->set_gdt(vcpu, &dt);
2330 void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
2332 struct descriptor_table dt = { limit, base };
2334 kvm_x86_ops->set_idt(vcpu, &dt);
2337 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
2338 unsigned long *rflags)
2341 *rflags = kvm_x86_ops->get_rflags(vcpu);
2344 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr)
2346 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
2349 return vcpu->arch.cr0;
2351 return vcpu->arch.cr2;
2353 return vcpu->arch.cr3;
2355 return vcpu->arch.cr4;
2357 return get_cr8(vcpu);
2359 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
2364 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val,
2365 unsigned long *rflags)
2369 set_cr0(vcpu, mk_cr_64(vcpu->arch.cr0, val));
2370 *rflags = kvm_x86_ops->get_rflags(vcpu);
2373 vcpu->arch.cr2 = val;
2379 set_cr4(vcpu, mk_cr_64(vcpu->arch.cr4, val));
2382 set_cr8(vcpu, val & 0xfUL);
2385 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
2389 static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i)
2391 struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i];
2392 int j, nent = vcpu->arch.cpuid_nent;
2394 e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT;
2395 /* when no next entry is found, the current entry[i] is reselected */
2396 for (j = i + 1; j == i; j = (j + 1) % nent) {
2397 struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j];
2398 if (ej->function == e->function) {
2399 ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT;
2403 return 0; /* silence gcc, even though control never reaches here */
2406 /* find an entry with matching function, matching index (if needed), and that
2407 * should be read next (if it's stateful) */
2408 static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e,
2409 u32 function, u32 index)
2411 if (e->function != function)
2413 if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index)
2415 if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) &&
2416 !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT))
2421 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
2424 u32 function, index;
2425 struct kvm_cpuid_entry2 *e, *best;
2427 kvm_x86_ops->cache_regs(vcpu);
2428 function = vcpu->arch.regs[VCPU_REGS_RAX];
2429 index = vcpu->arch.regs[VCPU_REGS_RCX];
2430 vcpu->arch.regs[VCPU_REGS_RAX] = 0;
2431 vcpu->arch.regs[VCPU_REGS_RBX] = 0;
2432 vcpu->arch.regs[VCPU_REGS_RCX] = 0;
2433 vcpu->arch.regs[VCPU_REGS_RDX] = 0;
2435 for (i = 0; i < vcpu->arch.cpuid_nent; ++i) {
2436 e = &vcpu->arch.cpuid_entries[i];
2437 if (is_matching_cpuid_entry(e, function, index)) {
2438 if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC)
2439 move_to_next_stateful_cpuid_entry(vcpu, i);
2444 * Both basic or both extended?
2446 if (((e->function ^ function) & 0x80000000) == 0)
2447 if (!best || e->function > best->function)
2451 vcpu->arch.regs[VCPU_REGS_RAX] = best->eax;
2452 vcpu->arch.regs[VCPU_REGS_RBX] = best->ebx;
2453 vcpu->arch.regs[VCPU_REGS_RCX] = best->ecx;
2454 vcpu->arch.regs[VCPU_REGS_RDX] = best->edx;
2456 kvm_x86_ops->decache_regs(vcpu);
2457 kvm_x86_ops->skip_emulated_instruction(vcpu);
2459 EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
2462 * Check if userspace requested an interrupt window, and that the
2463 * interrupt window is open.
2465 * No need to exit to userspace if we already have an interrupt queued.
2467 static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
2468 struct kvm_run *kvm_run)
2470 return (!vcpu->arch.irq_summary &&
2471 kvm_run->request_interrupt_window &&
2472 vcpu->arch.interrupt_window_open &&
2473 (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF));
2476 static void post_kvm_run_save(struct kvm_vcpu *vcpu,
2477 struct kvm_run *kvm_run)
2479 kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
2480 kvm_run->cr8 = get_cr8(vcpu);
2481 kvm_run->apic_base = kvm_get_apic_base(vcpu);
2482 if (irqchip_in_kernel(vcpu->kvm))
2483 kvm_run->ready_for_interrupt_injection = 1;
2485 kvm_run->ready_for_interrupt_injection =
2486 (vcpu->arch.interrupt_window_open &&
2487 vcpu->arch.irq_summary == 0);
2490 static void vapic_enter(struct kvm_vcpu *vcpu)
2492 struct kvm_lapic *apic = vcpu->arch.apic;
2495 if (!apic || !apic->vapic_addr)
2498 down_read(¤t->mm->mmap_sem);
2499 page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT);
2500 up_read(¤t->mm->mmap_sem);
2502 vcpu->arch.apic->vapic_page = page;
2505 static void vapic_exit(struct kvm_vcpu *vcpu)
2507 struct kvm_lapic *apic = vcpu->arch.apic;
2509 if (!apic || !apic->vapic_addr)
2512 kvm_release_page_dirty(apic->vapic_page);
2513 mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT);
2516 static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2520 if (unlikely(vcpu->arch.mp_state == VCPU_MP_STATE_SIPI_RECEIVED)) {
2521 pr_debug("vcpu %d received sipi with vector # %x\n",
2522 vcpu->vcpu_id, vcpu->arch.sipi_vector);
2523 kvm_lapic_reset(vcpu);
2524 r = kvm_x86_ops->vcpu_reset(vcpu);
2527 vcpu->arch.mp_state = VCPU_MP_STATE_RUNNABLE;
2533 if (vcpu->guest_debug.enabled)
2534 kvm_x86_ops->guest_debug_pre(vcpu);
2537 r = kvm_mmu_reload(vcpu);
2541 if (vcpu->requests) {
2542 if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests))
2543 __kvm_migrate_apic_timer(vcpu);
2544 if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS,
2546 kvm_run->exit_reason = KVM_EXIT_TPR_ACCESS;
2552 kvm_inject_pending_timer_irqs(vcpu);
2556 kvm_x86_ops->prepare_guest_switch(vcpu);
2557 kvm_load_guest_fpu(vcpu);
2559 local_irq_disable();
2561 if (need_resched()) {
2568 if (signal_pending(current)) {
2572 kvm_run->exit_reason = KVM_EXIT_INTR;
2573 ++vcpu->stat.signal_exits;
2577 if (vcpu->arch.exception.pending)
2578 __queue_exception(vcpu);
2579 else if (irqchip_in_kernel(vcpu->kvm))
2580 kvm_x86_ops->inject_pending_irq(vcpu);
2582 kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run);
2584 kvm_lapic_sync_to_vapic(vcpu);
2586 vcpu->guest_mode = 1;
2590 if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
2591 kvm_x86_ops->tlb_flush(vcpu);
2593 kvm_x86_ops->run(vcpu, kvm_run);
2595 vcpu->guest_mode = 0;
2601 * We must have an instruction between local_irq_enable() and
2602 * kvm_guest_exit(), so the timer interrupt isn't delayed by
2603 * the interrupt shadow. The stat.exits increment will do nicely.
2604 * But we need to prevent reordering, hence this barrier():
2613 * Profile KVM exit RIPs:
2615 if (unlikely(prof_on == KVM_PROFILING)) {
2616 kvm_x86_ops->cache_regs(vcpu);
2617 profile_hit(KVM_PROFILING, (void *)vcpu->arch.rip);
2620 if (vcpu->arch.exception.pending && kvm_x86_ops->exception_injected(vcpu))
2621 vcpu->arch.exception.pending = false;
2623 kvm_lapic_sync_from_vapic(vcpu);
2625 r = kvm_x86_ops->handle_exit(kvm_run, vcpu);
2628 if (dm_request_for_irq_injection(vcpu, kvm_run)) {
2630 kvm_run->exit_reason = KVM_EXIT_INTR;
2631 ++vcpu->stat.request_irq_exits;
2634 if (!need_resched())
2644 post_kvm_run_save(vcpu, kvm_run);
2651 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2658 if (unlikely(vcpu->arch.mp_state == VCPU_MP_STATE_UNINITIALIZED)) {
2659 kvm_vcpu_block(vcpu);
2664 if (vcpu->sigset_active)
2665 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
2667 /* re-sync apic's tpr */
2668 if (!irqchip_in_kernel(vcpu->kvm))
2669 set_cr8(vcpu, kvm_run->cr8);
2671 if (vcpu->arch.pio.cur_count) {
2672 r = complete_pio(vcpu);
2676 #if CONFIG_HAS_IOMEM
2677 if (vcpu->mmio_needed) {
2678 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
2679 vcpu->mmio_read_completed = 1;
2680 vcpu->mmio_needed = 0;
2681 r = emulate_instruction(vcpu, kvm_run,
2682 vcpu->arch.mmio_fault_cr2, 0,
2683 EMULTYPE_NO_DECODE);
2684 if (r == EMULATE_DO_MMIO) {
2686 * Read-modify-write. Back to userspace.
2693 if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) {
2694 kvm_x86_ops->cache_regs(vcpu);
2695 vcpu->arch.regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret;
2696 kvm_x86_ops->decache_regs(vcpu);
2699 r = __vcpu_run(vcpu, kvm_run);
2702 if (vcpu->sigset_active)
2703 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2709 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
2713 kvm_x86_ops->cache_regs(vcpu);
2715 regs->rax = vcpu->arch.regs[VCPU_REGS_RAX];
2716 regs->rbx = vcpu->arch.regs[VCPU_REGS_RBX];
2717 regs->rcx = vcpu->arch.regs[VCPU_REGS_RCX];
2718 regs->rdx = vcpu->arch.regs[VCPU_REGS_RDX];
2719 regs->rsi = vcpu->arch.regs[VCPU_REGS_RSI];
2720 regs->rdi = vcpu->arch.regs[VCPU_REGS_RDI];
2721 regs->rsp = vcpu->arch.regs[VCPU_REGS_RSP];
2722 regs->rbp = vcpu->arch.regs[VCPU_REGS_RBP];
2723 #ifdef CONFIG_X86_64
2724 regs->r8 = vcpu->arch.regs[VCPU_REGS_R8];
2725 regs->r9 = vcpu->arch.regs[VCPU_REGS_R9];
2726 regs->r10 = vcpu->arch.regs[VCPU_REGS_R10];
2727 regs->r11 = vcpu->arch.regs[VCPU_REGS_R11];
2728 regs->r12 = vcpu->arch.regs[VCPU_REGS_R12];
2729 regs->r13 = vcpu->arch.regs[VCPU_REGS_R13];
2730 regs->r14 = vcpu->arch.regs[VCPU_REGS_R14];
2731 regs->r15 = vcpu->arch.regs[VCPU_REGS_R15];
2734 regs->rip = vcpu->arch.rip;
2735 regs->rflags = kvm_x86_ops->get_rflags(vcpu);
2738 * Don't leak debug flags in case they were set for guest debugging
2740 if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep)
2741 regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
2748 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
2752 vcpu->arch.regs[VCPU_REGS_RAX] = regs->rax;
2753 vcpu->arch.regs[VCPU_REGS_RBX] = regs->rbx;
2754 vcpu->arch.regs[VCPU_REGS_RCX] = regs->rcx;
2755 vcpu->arch.regs[VCPU_REGS_RDX] = regs->rdx;
2756 vcpu->arch.regs[VCPU_REGS_RSI] = regs->rsi;
2757 vcpu->arch.regs[VCPU_REGS_RDI] = regs->rdi;
2758 vcpu->arch.regs[VCPU_REGS_RSP] = regs->rsp;
2759 vcpu->arch.regs[VCPU_REGS_RBP] = regs->rbp;
2760 #ifdef CONFIG_X86_64
2761 vcpu->arch.regs[VCPU_REGS_R8] = regs->r8;
2762 vcpu->arch.regs[VCPU_REGS_R9] = regs->r9;
2763 vcpu->arch.regs[VCPU_REGS_R10] = regs->r10;
2764 vcpu->arch.regs[VCPU_REGS_R11] = regs->r11;
2765 vcpu->arch.regs[VCPU_REGS_R12] = regs->r12;
2766 vcpu->arch.regs[VCPU_REGS_R13] = regs->r13;
2767 vcpu->arch.regs[VCPU_REGS_R14] = regs->r14;
2768 vcpu->arch.regs[VCPU_REGS_R15] = regs->r15;
2771 vcpu->arch.rip = regs->rip;
2772 kvm_x86_ops->set_rflags(vcpu, regs->rflags);
2774 kvm_x86_ops->decache_regs(vcpu);
2781 static void get_segment(struct kvm_vcpu *vcpu,
2782 struct kvm_segment *var, int seg)
2784 return kvm_x86_ops->get_segment(vcpu, var, seg);
2787 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
2789 struct kvm_segment cs;
2791 get_segment(vcpu, &cs, VCPU_SREG_CS);
2795 EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
2797 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
2798 struct kvm_sregs *sregs)
2800 struct descriptor_table dt;
2805 get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
2806 get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
2807 get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
2808 get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
2809 get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
2810 get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
2812 get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
2813 get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
2815 kvm_x86_ops->get_idt(vcpu, &dt);
2816 sregs->idt.limit = dt.limit;
2817 sregs->idt.base = dt.base;
2818 kvm_x86_ops->get_gdt(vcpu, &dt);
2819 sregs->gdt.limit = dt.limit;
2820 sregs->gdt.base = dt.base;
2822 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
2823 sregs->cr0 = vcpu->arch.cr0;
2824 sregs->cr2 = vcpu->arch.cr2;
2825 sregs->cr3 = vcpu->arch.cr3;
2826 sregs->cr4 = vcpu->arch.cr4;
2827 sregs->cr8 = get_cr8(vcpu);
2828 sregs->efer = vcpu->arch.shadow_efer;
2829 sregs->apic_base = kvm_get_apic_base(vcpu);
2831 if (irqchip_in_kernel(vcpu->kvm)) {
2832 memset(sregs->interrupt_bitmap, 0,
2833 sizeof sregs->interrupt_bitmap);
2834 pending_vec = kvm_x86_ops->get_irq(vcpu);
2835 if (pending_vec >= 0)
2836 set_bit(pending_vec,
2837 (unsigned long *)sregs->interrupt_bitmap);
2839 memcpy(sregs->interrupt_bitmap, vcpu->arch.irq_pending,
2840 sizeof sregs->interrupt_bitmap);
2847 static void set_segment(struct kvm_vcpu *vcpu,
2848 struct kvm_segment *var, int seg)
2850 return kvm_x86_ops->set_segment(vcpu, var, seg);
2853 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
2854 struct kvm_sregs *sregs)
2856 int mmu_reset_needed = 0;
2857 int i, pending_vec, max_bits;
2858 struct descriptor_table dt;
2862 dt.limit = sregs->idt.limit;
2863 dt.base = sregs->idt.base;
2864 kvm_x86_ops->set_idt(vcpu, &dt);
2865 dt.limit = sregs->gdt.limit;
2866 dt.base = sregs->gdt.base;
2867 kvm_x86_ops->set_gdt(vcpu, &dt);
2869 vcpu->arch.cr2 = sregs->cr2;
2870 mmu_reset_needed |= vcpu->arch.cr3 != sregs->cr3;
2871 vcpu->arch.cr3 = sregs->cr3;
2873 set_cr8(vcpu, sregs->cr8);
2875 mmu_reset_needed |= vcpu->arch.shadow_efer != sregs->efer;
2876 kvm_x86_ops->set_efer(vcpu, sregs->efer);
2877 kvm_set_apic_base(vcpu, sregs->apic_base);
2879 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
2881 mmu_reset_needed |= vcpu->arch.cr0 != sregs->cr0;
2882 kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
2883 vcpu->arch.cr0 = sregs->cr0;
2885 mmu_reset_needed |= vcpu->arch.cr4 != sregs->cr4;
2886 kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
2887 if (!is_long_mode(vcpu) && is_pae(vcpu))
2888 load_pdptrs(vcpu, vcpu->arch.cr3);
2890 if (mmu_reset_needed)
2891 kvm_mmu_reset_context(vcpu);
2893 if (!irqchip_in_kernel(vcpu->kvm)) {
2894 memcpy(vcpu->arch.irq_pending, sregs->interrupt_bitmap,
2895 sizeof vcpu->arch.irq_pending);
2896 vcpu->arch.irq_summary = 0;
2897 for (i = 0; i < ARRAY_SIZE(vcpu->arch.irq_pending); ++i)
2898 if (vcpu->arch.irq_pending[i])
2899 __set_bit(i, &vcpu->arch.irq_summary);
2901 max_bits = (sizeof sregs->interrupt_bitmap) << 3;
2902 pending_vec = find_first_bit(
2903 (const unsigned long *)sregs->interrupt_bitmap,
2905 /* Only pending external irq is handled here */
2906 if (pending_vec < max_bits) {
2907 kvm_x86_ops->set_irq(vcpu, pending_vec);
2908 pr_debug("Set back pending irq %d\n",
2913 set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
2914 set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
2915 set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
2916 set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
2917 set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
2918 set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
2920 set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
2921 set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
2928 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
2929 struct kvm_debug_guest *dbg)
2935 r = kvm_x86_ops->set_guest_debug(vcpu, dbg);
2943 * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
2944 * we have asm/x86/processor.h
2955 u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
2956 #ifdef CONFIG_X86_64
2957 u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
2959 u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
2964 * Translate a guest virtual address to a guest physical address.
2966 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
2967 struct kvm_translation *tr)
2969 unsigned long vaddr = tr->linear_address;
2973 down_read(&vcpu->kvm->slots_lock);
2974 gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, vaddr);
2975 up_read(&vcpu->kvm->slots_lock);
2976 tr->physical_address = gpa;
2977 tr->valid = gpa != UNMAPPED_GVA;
2985 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2987 struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image;
2991 memcpy(fpu->fpr, fxsave->st_space, 128);
2992 fpu->fcw = fxsave->cwd;
2993 fpu->fsw = fxsave->swd;
2994 fpu->ftwx = fxsave->twd;
2995 fpu->last_opcode = fxsave->fop;
2996 fpu->last_ip = fxsave->rip;
2997 fpu->last_dp = fxsave->rdp;
2998 memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space);
3005 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
3007 struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image;
3011 memcpy(fxsave->st_space, fpu->fpr, 128);
3012 fxsave->cwd = fpu->fcw;
3013 fxsave->swd = fpu->fsw;
3014 fxsave->twd = fpu->ftwx;
3015 fxsave->fop = fpu->last_opcode;
3016 fxsave->rip = fpu->last_ip;
3017 fxsave->rdp = fpu->last_dp;
3018 memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space);
3025 void fx_init(struct kvm_vcpu *vcpu)
3027 unsigned after_mxcsr_mask;
3029 /* Initialize guest FPU by resetting ours and saving into guest's */
3031 fx_save(&vcpu->arch.host_fx_image);
3033 fx_save(&vcpu->arch.guest_fx_image);
3034 fx_restore(&vcpu->arch.host_fx_image);
3037 vcpu->arch.cr0 |= X86_CR0_ET;
3038 after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space);
3039 vcpu->arch.guest_fx_image.mxcsr = 0x1f80;
3040 memset((void *)&vcpu->arch.guest_fx_image + after_mxcsr_mask,
3041 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask);
3043 EXPORT_SYMBOL_GPL(fx_init);
3045 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
3047 if (!vcpu->fpu_active || vcpu->guest_fpu_loaded)
3050 vcpu->guest_fpu_loaded = 1;
3051 fx_save(&vcpu->arch.host_fx_image);
3052 fx_restore(&vcpu->arch.guest_fx_image);
3054 EXPORT_SYMBOL_GPL(kvm_load_guest_fpu);
3056 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
3058 if (!vcpu->guest_fpu_loaded)
3061 vcpu->guest_fpu_loaded = 0;
3062 fx_save(&vcpu->arch.guest_fx_image);
3063 fx_restore(&vcpu->arch.host_fx_image);
3064 ++vcpu->stat.fpu_reload;
3066 EXPORT_SYMBOL_GPL(kvm_put_guest_fpu);
3068 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
3070 kvm_x86_ops->vcpu_free(vcpu);
3073 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
3076 return kvm_x86_ops->vcpu_create(kvm, id);
3079 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
3083 /* We do fxsave: this must be aligned. */
3084 BUG_ON((unsigned long)&vcpu->arch.host_fx_image & 0xF);
3087 r = kvm_arch_vcpu_reset(vcpu);
3089 r = kvm_mmu_setup(vcpu);
3096 kvm_x86_ops->vcpu_free(vcpu);
3100 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
3103 kvm_mmu_unload(vcpu);
3106 kvm_x86_ops->vcpu_free(vcpu);
3109 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu)
3111 return kvm_x86_ops->vcpu_reset(vcpu);
3114 void kvm_arch_hardware_enable(void *garbage)
3116 kvm_x86_ops->hardware_enable(garbage);
3119 void kvm_arch_hardware_disable(void *garbage)
3121 kvm_x86_ops->hardware_disable(garbage);
3124 int kvm_arch_hardware_setup(void)
3126 return kvm_x86_ops->hardware_setup();
3129 void kvm_arch_hardware_unsetup(void)
3131 kvm_x86_ops->hardware_unsetup();
3134 void kvm_arch_check_processor_compat(void *rtn)
3136 kvm_x86_ops->check_processor_compatibility(rtn);
3139 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
3145 BUG_ON(vcpu->kvm == NULL);
3148 vcpu->arch.mmu.root_hpa = INVALID_PAGE;
3149 if (!irqchip_in_kernel(kvm) || vcpu->vcpu_id == 0)
3150 vcpu->arch.mp_state = VCPU_MP_STATE_RUNNABLE;
3152 vcpu->arch.mp_state = VCPU_MP_STATE_UNINITIALIZED;
3154 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
3159 vcpu->arch.pio_data = page_address(page);
3161 r = kvm_mmu_create(vcpu);
3163 goto fail_free_pio_data;
3165 if (irqchip_in_kernel(kvm)) {
3166 r = kvm_create_lapic(vcpu);
3168 goto fail_mmu_destroy;
3174 kvm_mmu_destroy(vcpu);
3176 free_page((unsigned long)vcpu->arch.pio_data);
3181 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
3183 kvm_free_lapic(vcpu);
3184 kvm_mmu_destroy(vcpu);
3185 free_page((unsigned long)vcpu->arch.pio_data);
3188 struct kvm *kvm_arch_create_vm(void)
3190 struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
3193 return ERR_PTR(-ENOMEM);
3195 INIT_LIST_HEAD(&kvm->arch.active_mmu_pages);
3200 static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
3203 kvm_mmu_unload(vcpu);
3207 static void kvm_free_vcpus(struct kvm *kvm)
3212 * Unpin any mmu pages first.
3214 for (i = 0; i < KVM_MAX_VCPUS; ++i)
3216 kvm_unload_vcpu_mmu(kvm->vcpus[i]);
3217 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
3218 if (kvm->vcpus[i]) {
3219 kvm_arch_vcpu_free(kvm->vcpus[i]);
3220 kvm->vcpus[i] = NULL;
3226 void kvm_arch_destroy_vm(struct kvm *kvm)
3228 kfree(kvm->arch.vpic);
3229 kfree(kvm->arch.vioapic);
3230 kvm_free_vcpus(kvm);
3231 kvm_free_physmem(kvm);
3235 int kvm_arch_set_memory_region(struct kvm *kvm,
3236 struct kvm_userspace_memory_region *mem,
3237 struct kvm_memory_slot old,
3240 int npages = mem->memory_size >> PAGE_SHIFT;
3241 struct kvm_memory_slot *memslot = &kvm->memslots[mem->slot];
3243 /*To keep backward compatibility with older userspace,
3244 *x86 needs to hanlde !user_alloc case.
3247 if (npages && !old.rmap) {
3248 down_write(¤t->mm->mmap_sem);
3249 memslot->userspace_addr = do_mmap(NULL, 0,
3251 PROT_READ | PROT_WRITE,
3252 MAP_SHARED | MAP_ANONYMOUS,
3254 up_write(¤t->mm->mmap_sem);
3256 if (IS_ERR((void *)memslot->userspace_addr))
3257 return PTR_ERR((void *)memslot->userspace_addr);
3259 if (!old.user_alloc && old.rmap) {
3262 down_write(¤t->mm->mmap_sem);
3263 ret = do_munmap(current->mm, old.userspace_addr,
3264 old.npages * PAGE_SIZE);
3265 up_write(¤t->mm->mmap_sem);
3268 "kvm_vm_ioctl_set_memory_region: "
3269 "failed to munmap memory\n");
3274 if (!kvm->arch.n_requested_mmu_pages) {
3275 unsigned int nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm);
3276 kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages);
3279 kvm_mmu_slot_remove_write_access(kvm, mem->slot);
3280 kvm_flush_remote_tlbs(kvm);
3285 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
3287 return vcpu->arch.mp_state == VCPU_MP_STATE_RUNNABLE
3288 || vcpu->arch.mp_state == VCPU_MP_STATE_SIPI_RECEIVED;
3291 static void vcpu_kick_intr(void *info)
3294 struct kvm_vcpu *vcpu = (struct kvm_vcpu *)info;
3295 printk(KERN_DEBUG "vcpu_kick_intr %p \n", vcpu);
3299 void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
3301 int ipi_pcpu = vcpu->cpu;
3303 if (waitqueue_active(&vcpu->wq)) {
3304 wake_up_interruptible(&vcpu->wq);
3305 ++vcpu->stat.halt_wakeup;
3307 if (vcpu->guest_mode)
3308 smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0, 0);