2 * Kernel-based Virtual Machine driver for Linux
4 * derived from drivers/kvm/kvm_main.c
6 * Copyright (C) 2006 Qumranet, Inc.
7 * Copyright (C) 2008 Qumranet, Inc.
8 * Copyright IBM Corporation, 2008
11 * Avi Kivity <avi@qumranet.com>
12 * Yaniv Kamay <yaniv@qumranet.com>
13 * Amit Shah <amit.shah@qumranet.com>
14 * Ben-Ami Yassour <benami@il.ibm.com>
16 * This work is licensed under the terms of the GNU GPL, version 2. See
17 * the COPYING file in the top-level directory.
21 #include <linux/kvm_host.h>
26 #include "kvm_cache_regs.h"
29 #include <linux/clocksource.h>
30 #include <linux/interrupt.h>
31 #include <linux/kvm.h>
33 #include <linux/pci.h>
34 #include <linux/vmalloc.h>
35 #include <linux/module.h>
36 #include <linux/mman.h>
37 #include <linux/highmem.h>
38 #include <linux/intel-iommu.h>
40 #include <asm/uaccess.h>
44 #define MAX_IO_MSRS 256
45 #define CR0_RESERVED_BITS \
46 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
47 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
48 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
49 #define CR4_RESERVED_BITS \
50 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
51 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \
52 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \
53 | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
55 #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
57 * - enable syscall per default because its emulated by KVM
58 * - enable LME and LMA per default on 64 bit KVM
61 static u64 __read_mostly efer_reserved_bits
= 0xfffffffffffffafeULL
;
63 static u64 __read_mostly efer_reserved_bits
= 0xfffffffffffffffeULL
;
66 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
67 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
69 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2
*cpuid
,
70 struct kvm_cpuid_entry2 __user
*entries
);
72 struct kvm_x86_ops
*kvm_x86_ops
;
73 EXPORT_SYMBOL_GPL(kvm_x86_ops
);
75 struct kvm_stats_debugfs_item debugfs_entries
[] = {
76 { "pf_fixed", VCPU_STAT(pf_fixed
) },
77 { "pf_guest", VCPU_STAT(pf_guest
) },
78 { "tlb_flush", VCPU_STAT(tlb_flush
) },
79 { "invlpg", VCPU_STAT(invlpg
) },
80 { "exits", VCPU_STAT(exits
) },
81 { "io_exits", VCPU_STAT(io_exits
) },
82 { "mmio_exits", VCPU_STAT(mmio_exits
) },
83 { "signal_exits", VCPU_STAT(signal_exits
) },
84 { "irq_window", VCPU_STAT(irq_window_exits
) },
85 { "nmi_window", VCPU_STAT(nmi_window_exits
) },
86 { "halt_exits", VCPU_STAT(halt_exits
) },
87 { "halt_wakeup", VCPU_STAT(halt_wakeup
) },
88 { "hypercalls", VCPU_STAT(hypercalls
) },
89 { "request_irq", VCPU_STAT(request_irq_exits
) },
90 { "irq_exits", VCPU_STAT(irq_exits
) },
91 { "host_state_reload", VCPU_STAT(host_state_reload
) },
92 { "efer_reload", VCPU_STAT(efer_reload
) },
93 { "fpu_reload", VCPU_STAT(fpu_reload
) },
94 { "insn_emulation", VCPU_STAT(insn_emulation
) },
95 { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail
) },
96 { "irq_injections", VCPU_STAT(irq_injections
) },
97 { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped
) },
98 { "mmu_pte_write", VM_STAT(mmu_pte_write
) },
99 { "mmu_pte_updated", VM_STAT(mmu_pte_updated
) },
100 { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped
) },
101 { "mmu_flooded", VM_STAT(mmu_flooded
) },
102 { "mmu_recycled", VM_STAT(mmu_recycled
) },
103 { "mmu_cache_miss", VM_STAT(mmu_cache_miss
) },
104 { "remote_tlb_flush", VM_STAT(remote_tlb_flush
) },
105 { "largepages", VM_STAT(lpages
) },
109 static struct kvm_assigned_dev_kernel
*kvm_find_assigned_dev(struct list_head
*head
,
112 struct list_head
*ptr
;
113 struct kvm_assigned_dev_kernel
*match
;
115 list_for_each(ptr
, head
) {
116 match
= list_entry(ptr
, struct kvm_assigned_dev_kernel
, list
);
117 if (match
->assigned_dev_id
== assigned_dev_id
)
123 static void kvm_assigned_dev_interrupt_work_handler(struct work_struct
*work
)
125 struct kvm_assigned_dev_kernel
*assigned_dev
;
127 assigned_dev
= container_of(work
, struct kvm_assigned_dev_kernel
,
130 /* This is taken to safely inject irq inside the guest. When
131 * the interrupt injection (or the ioapic code) uses a
132 * finer-grained lock, update this
134 mutex_lock(&assigned_dev
->kvm
->lock
);
135 kvm_set_irq(assigned_dev
->kvm
,
136 assigned_dev
->guest_irq
, 1);
137 mutex_unlock(&assigned_dev
->kvm
->lock
);
138 kvm_put_kvm(assigned_dev
->kvm
);
141 /* FIXME: Implement the OR logic needed to make shared interrupts on
142 * this line behave properly
144 static irqreturn_t
kvm_assigned_dev_intr(int irq
, void *dev_id
)
146 struct kvm_assigned_dev_kernel
*assigned_dev
=
147 (struct kvm_assigned_dev_kernel
*) dev_id
;
149 kvm_get_kvm(assigned_dev
->kvm
);
150 schedule_work(&assigned_dev
->interrupt_work
);
151 disable_irq_nosync(irq
);
155 /* Ack the irq line for an assigned device */
156 static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier
*kian
)
158 struct kvm_assigned_dev_kernel
*dev
;
163 dev
= container_of(kian
, struct kvm_assigned_dev_kernel
,
165 kvm_set_irq(dev
->kvm
, dev
->guest_irq
, 0);
166 enable_irq(dev
->host_irq
);
169 static void kvm_free_assigned_device(struct kvm
*kvm
,
170 struct kvm_assigned_dev_kernel
173 if (irqchip_in_kernel(kvm
) && assigned_dev
->irq_requested
)
174 free_irq(assigned_dev
->host_irq
, (void *)assigned_dev
);
176 kvm_unregister_irq_ack_notifier(kvm
, &assigned_dev
->ack_notifier
);
178 if (cancel_work_sync(&assigned_dev
->interrupt_work
))
179 /* We had pending work. That means we will have to take
180 * care of kvm_put_kvm.
184 pci_release_regions(assigned_dev
->dev
);
185 pci_disable_device(assigned_dev
->dev
);
186 pci_dev_put(assigned_dev
->dev
);
188 list_del(&assigned_dev
->list
);
192 static void kvm_free_all_assigned_devices(struct kvm
*kvm
)
194 struct list_head
*ptr
, *ptr2
;
195 struct kvm_assigned_dev_kernel
*assigned_dev
;
197 list_for_each_safe(ptr
, ptr2
, &kvm
->arch
.assigned_dev_head
) {
198 assigned_dev
= list_entry(ptr
,
199 struct kvm_assigned_dev_kernel
,
202 kvm_free_assigned_device(kvm
, assigned_dev
);
206 static int kvm_vm_ioctl_assign_irq(struct kvm
*kvm
,
207 struct kvm_assigned_irq
211 struct kvm_assigned_dev_kernel
*match
;
213 mutex_lock(&kvm
->lock
);
215 match
= kvm_find_assigned_dev(&kvm
->arch
.assigned_dev_head
,
216 assigned_irq
->assigned_dev_id
);
218 mutex_unlock(&kvm
->lock
);
222 if (match
->irq_requested
) {
223 match
->guest_irq
= assigned_irq
->guest_irq
;
224 match
->ack_notifier
.gsi
= assigned_irq
->guest_irq
;
225 mutex_unlock(&kvm
->lock
);
229 INIT_WORK(&match
->interrupt_work
,
230 kvm_assigned_dev_interrupt_work_handler
);
232 if (irqchip_in_kernel(kvm
)) {
233 if (!capable(CAP_SYS_RAWIO
)) {
238 if (assigned_irq
->host_irq
)
239 match
->host_irq
= assigned_irq
->host_irq
;
241 match
->host_irq
= match
->dev
->irq
;
242 match
->guest_irq
= assigned_irq
->guest_irq
;
243 match
->ack_notifier
.gsi
= assigned_irq
->guest_irq
;
244 match
->ack_notifier
.irq_acked
= kvm_assigned_dev_ack_irq
;
245 kvm_register_irq_ack_notifier(kvm
, &match
->ack_notifier
);
247 /* Even though this is PCI, we don't want to use shared
248 * interrupts. Sharing host devices with guest-assigned devices
249 * on the same interrupt line is not a happy situation: there
250 * are going to be long delays in accepting, acking, etc.
252 if (request_irq(match
->host_irq
, kvm_assigned_dev_intr
, 0,
253 "kvm_assigned_device", (void *)match
)) {
259 match
->irq_requested
= true;
260 mutex_unlock(&kvm
->lock
);
263 mutex_unlock(&kvm
->lock
);
264 kvm_free_assigned_device(kvm
, match
);
268 static int kvm_vm_ioctl_assign_device(struct kvm
*kvm
,
269 struct kvm_assigned_pci_dev
*assigned_dev
)
272 struct kvm_assigned_dev_kernel
*match
;
275 mutex_lock(&kvm
->lock
);
277 match
= kvm_find_assigned_dev(&kvm
->arch
.assigned_dev_head
,
278 assigned_dev
->assigned_dev_id
);
280 /* device already assigned */
285 match
= kzalloc(sizeof(struct kvm_assigned_dev_kernel
), GFP_KERNEL
);
287 printk(KERN_INFO
"%s: Couldn't allocate memory\n",
292 dev
= pci_get_bus_and_slot(assigned_dev
->busnr
,
293 assigned_dev
->devfn
);
295 printk(KERN_INFO
"%s: host device not found\n", __func__
);
299 if (pci_enable_device(dev
)) {
300 printk(KERN_INFO
"%s: Could not enable PCI device\n", __func__
);
304 r
= pci_request_regions(dev
, "kvm_assigned_device");
306 printk(KERN_INFO
"%s: Could not get access to device regions\n",
310 match
->assigned_dev_id
= assigned_dev
->assigned_dev_id
;
311 match
->host_busnr
= assigned_dev
->busnr
;
312 match
->host_devfn
= assigned_dev
->devfn
;
317 list_add(&match
->list
, &kvm
->arch
.assigned_dev_head
);
319 if (assigned_dev
->flags
& KVM_DEV_ASSIGN_ENABLE_IOMMU
) {
320 r
= kvm_iommu_map_guest(kvm
, match
);
326 mutex_unlock(&kvm
->lock
);
329 list_del(&match
->list
);
330 pci_release_regions(dev
);
332 pci_disable_device(dev
);
337 mutex_unlock(&kvm
->lock
);
341 unsigned long segment_base(u16 selector
)
343 struct descriptor_table gdt
;
344 struct desc_struct
*d
;
345 unsigned long table_base
;
351 asm("sgdt %0" : "=m"(gdt
));
352 table_base
= gdt
.base
;
354 if (selector
& 4) { /* from ldt */
357 asm("sldt %0" : "=g"(ldt_selector
));
358 table_base
= segment_base(ldt_selector
);
360 d
= (struct desc_struct
*)(table_base
+ (selector
& ~7));
361 v
= d
->base0
| ((unsigned long)d
->base1
<< 16) |
362 ((unsigned long)d
->base2
<< 24);
364 if (d
->s
== 0 && (d
->type
== 2 || d
->type
== 9 || d
->type
== 11))
365 v
|= ((unsigned long)((struct ldttss_desc64
*)d
)->base3
) << 32;
369 EXPORT_SYMBOL_GPL(segment_base
);
371 u64
kvm_get_apic_base(struct kvm_vcpu
*vcpu
)
373 if (irqchip_in_kernel(vcpu
->kvm
))
374 return vcpu
->arch
.apic_base
;
376 return vcpu
->arch
.apic_base
;
378 EXPORT_SYMBOL_GPL(kvm_get_apic_base
);
380 void kvm_set_apic_base(struct kvm_vcpu
*vcpu
, u64 data
)
382 /* TODO: reserve bits check */
383 if (irqchip_in_kernel(vcpu
->kvm
))
384 kvm_lapic_set_base(vcpu
, data
);
386 vcpu
->arch
.apic_base
= data
;
388 EXPORT_SYMBOL_GPL(kvm_set_apic_base
);
390 void kvm_queue_exception(struct kvm_vcpu
*vcpu
, unsigned nr
)
392 WARN_ON(vcpu
->arch
.exception
.pending
);
393 vcpu
->arch
.exception
.pending
= true;
394 vcpu
->arch
.exception
.has_error_code
= false;
395 vcpu
->arch
.exception
.nr
= nr
;
397 EXPORT_SYMBOL_GPL(kvm_queue_exception
);
399 void kvm_inject_page_fault(struct kvm_vcpu
*vcpu
, unsigned long addr
,
402 ++vcpu
->stat
.pf_guest
;
403 if (vcpu
->arch
.exception
.pending
) {
404 if (vcpu
->arch
.exception
.nr
== PF_VECTOR
) {
405 printk(KERN_DEBUG
"kvm: inject_page_fault:"
406 " double fault 0x%lx\n", addr
);
407 vcpu
->arch
.exception
.nr
= DF_VECTOR
;
408 vcpu
->arch
.exception
.error_code
= 0;
409 } else if (vcpu
->arch
.exception
.nr
== DF_VECTOR
) {
410 /* triple fault -> shutdown */
411 set_bit(KVM_REQ_TRIPLE_FAULT
, &vcpu
->requests
);
415 vcpu
->arch
.cr2
= addr
;
416 kvm_queue_exception_e(vcpu
, PF_VECTOR
, error_code
);
419 void kvm_inject_nmi(struct kvm_vcpu
*vcpu
)
421 vcpu
->arch
.nmi_pending
= 1;
423 EXPORT_SYMBOL_GPL(kvm_inject_nmi
);
425 void kvm_queue_exception_e(struct kvm_vcpu
*vcpu
, unsigned nr
, u32 error_code
)
427 WARN_ON(vcpu
->arch
.exception
.pending
);
428 vcpu
->arch
.exception
.pending
= true;
429 vcpu
->arch
.exception
.has_error_code
= true;
430 vcpu
->arch
.exception
.nr
= nr
;
431 vcpu
->arch
.exception
.error_code
= error_code
;
433 EXPORT_SYMBOL_GPL(kvm_queue_exception_e
);
435 static void __queue_exception(struct kvm_vcpu
*vcpu
)
437 kvm_x86_ops
->queue_exception(vcpu
, vcpu
->arch
.exception
.nr
,
438 vcpu
->arch
.exception
.has_error_code
,
439 vcpu
->arch
.exception
.error_code
);
443 * Load the pae pdptrs. Return true is they are all valid.
445 int load_pdptrs(struct kvm_vcpu
*vcpu
, unsigned long cr3
)
447 gfn_t pdpt_gfn
= cr3
>> PAGE_SHIFT
;
448 unsigned offset
= ((cr3
& (PAGE_SIZE
-1)) >> 5) << 2;
451 u64 pdpte
[ARRAY_SIZE(vcpu
->arch
.pdptrs
)];
453 ret
= kvm_read_guest_page(vcpu
->kvm
, pdpt_gfn
, pdpte
,
454 offset
* sizeof(u64
), sizeof(pdpte
));
459 for (i
= 0; i
< ARRAY_SIZE(pdpte
); ++i
) {
460 if ((pdpte
[i
] & 1) && (pdpte
[i
] & 0xfffffff0000001e6ull
)) {
467 memcpy(vcpu
->arch
.pdptrs
, pdpte
, sizeof(vcpu
->arch
.pdptrs
));
472 EXPORT_SYMBOL_GPL(load_pdptrs
);
474 static bool pdptrs_changed(struct kvm_vcpu
*vcpu
)
476 u64 pdpte
[ARRAY_SIZE(vcpu
->arch
.pdptrs
)];
480 if (is_long_mode(vcpu
) || !is_pae(vcpu
))
483 r
= kvm_read_guest(vcpu
->kvm
, vcpu
->arch
.cr3
& ~31u, pdpte
, sizeof(pdpte
));
486 changed
= memcmp(pdpte
, vcpu
->arch
.pdptrs
, sizeof(pdpte
)) != 0;
492 void kvm_set_cr0(struct kvm_vcpu
*vcpu
, unsigned long cr0
)
494 if (cr0
& CR0_RESERVED_BITS
) {
495 printk(KERN_DEBUG
"set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
496 cr0
, vcpu
->arch
.cr0
);
497 kvm_inject_gp(vcpu
, 0);
501 if ((cr0
& X86_CR0_NW
) && !(cr0
& X86_CR0_CD
)) {
502 printk(KERN_DEBUG
"set_cr0: #GP, CD == 0 && NW == 1\n");
503 kvm_inject_gp(vcpu
, 0);
507 if ((cr0
& X86_CR0_PG
) && !(cr0
& X86_CR0_PE
)) {
508 printk(KERN_DEBUG
"set_cr0: #GP, set PG flag "
509 "and a clear PE flag\n");
510 kvm_inject_gp(vcpu
, 0);
514 if (!is_paging(vcpu
) && (cr0
& X86_CR0_PG
)) {
516 if ((vcpu
->arch
.shadow_efer
& EFER_LME
)) {
520 printk(KERN_DEBUG
"set_cr0: #GP, start paging "
521 "in long mode while PAE is disabled\n");
522 kvm_inject_gp(vcpu
, 0);
525 kvm_x86_ops
->get_cs_db_l_bits(vcpu
, &cs_db
, &cs_l
);
527 printk(KERN_DEBUG
"set_cr0: #GP, start paging "
528 "in long mode while CS.L == 1\n");
529 kvm_inject_gp(vcpu
, 0);
535 if (is_pae(vcpu
) && !load_pdptrs(vcpu
, vcpu
->arch
.cr3
)) {
536 printk(KERN_DEBUG
"set_cr0: #GP, pdptrs "
538 kvm_inject_gp(vcpu
, 0);
544 kvm_x86_ops
->set_cr0(vcpu
, cr0
);
545 vcpu
->arch
.cr0
= cr0
;
547 kvm_mmu_reset_context(vcpu
);
550 EXPORT_SYMBOL_GPL(kvm_set_cr0
);
552 void kvm_lmsw(struct kvm_vcpu
*vcpu
, unsigned long msw
)
554 kvm_set_cr0(vcpu
, (vcpu
->arch
.cr0
& ~0x0ful
) | (msw
& 0x0f));
555 KVMTRACE_1D(LMSW
, vcpu
,
556 (u32
)((vcpu
->arch
.cr0
& ~0x0ful
) | (msw
& 0x0f)),
559 EXPORT_SYMBOL_GPL(kvm_lmsw
);
561 void kvm_set_cr4(struct kvm_vcpu
*vcpu
, unsigned long cr4
)
563 if (cr4
& CR4_RESERVED_BITS
) {
564 printk(KERN_DEBUG
"set_cr4: #GP, reserved bits\n");
565 kvm_inject_gp(vcpu
, 0);
569 if (is_long_mode(vcpu
)) {
570 if (!(cr4
& X86_CR4_PAE
)) {
571 printk(KERN_DEBUG
"set_cr4: #GP, clearing PAE while "
573 kvm_inject_gp(vcpu
, 0);
576 } else if (is_paging(vcpu
) && !is_pae(vcpu
) && (cr4
& X86_CR4_PAE
)
577 && !load_pdptrs(vcpu
, vcpu
->arch
.cr3
)) {
578 printk(KERN_DEBUG
"set_cr4: #GP, pdptrs reserved bits\n");
579 kvm_inject_gp(vcpu
, 0);
583 if (cr4
& X86_CR4_VMXE
) {
584 printk(KERN_DEBUG
"set_cr4: #GP, setting VMXE\n");
585 kvm_inject_gp(vcpu
, 0);
588 kvm_x86_ops
->set_cr4(vcpu
, cr4
);
589 vcpu
->arch
.cr4
= cr4
;
590 kvm_mmu_reset_context(vcpu
);
592 EXPORT_SYMBOL_GPL(kvm_set_cr4
);
594 void kvm_set_cr3(struct kvm_vcpu
*vcpu
, unsigned long cr3
)
596 if (cr3
== vcpu
->arch
.cr3
&& !pdptrs_changed(vcpu
)) {
597 kvm_mmu_sync_roots(vcpu
);
598 kvm_mmu_flush_tlb(vcpu
);
602 if (is_long_mode(vcpu
)) {
603 if (cr3
& CR3_L_MODE_RESERVED_BITS
) {
604 printk(KERN_DEBUG
"set_cr3: #GP, reserved bits\n");
605 kvm_inject_gp(vcpu
, 0);
610 if (cr3
& CR3_PAE_RESERVED_BITS
) {
612 "set_cr3: #GP, reserved bits\n");
613 kvm_inject_gp(vcpu
, 0);
616 if (is_paging(vcpu
) && !load_pdptrs(vcpu
, cr3
)) {
617 printk(KERN_DEBUG
"set_cr3: #GP, pdptrs "
619 kvm_inject_gp(vcpu
, 0);
624 * We don't check reserved bits in nonpae mode, because
625 * this isn't enforced, and VMware depends on this.
630 * Does the new cr3 value map to physical memory? (Note, we
631 * catch an invalid cr3 even in real-mode, because it would
632 * cause trouble later on when we turn on paging anyway.)
634 * A real CPU would silently accept an invalid cr3 and would
635 * attempt to use it - with largely undefined (and often hard
636 * to debug) behavior on the guest side.
638 if (unlikely(!gfn_to_memslot(vcpu
->kvm
, cr3
>> PAGE_SHIFT
)))
639 kvm_inject_gp(vcpu
, 0);
641 vcpu
->arch
.cr3
= cr3
;
642 vcpu
->arch
.mmu
.new_cr3(vcpu
);
645 EXPORT_SYMBOL_GPL(kvm_set_cr3
);
647 void kvm_set_cr8(struct kvm_vcpu
*vcpu
, unsigned long cr8
)
649 if (cr8
& CR8_RESERVED_BITS
) {
650 printk(KERN_DEBUG
"set_cr8: #GP, reserved bits 0x%lx\n", cr8
);
651 kvm_inject_gp(vcpu
, 0);
654 if (irqchip_in_kernel(vcpu
->kvm
))
655 kvm_lapic_set_tpr(vcpu
, cr8
);
657 vcpu
->arch
.cr8
= cr8
;
659 EXPORT_SYMBOL_GPL(kvm_set_cr8
);
661 unsigned long kvm_get_cr8(struct kvm_vcpu
*vcpu
)
663 if (irqchip_in_kernel(vcpu
->kvm
))
664 return kvm_lapic_get_cr8(vcpu
);
666 return vcpu
->arch
.cr8
;
668 EXPORT_SYMBOL_GPL(kvm_get_cr8
);
671 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
672 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
674 * This list is modified at module load time to reflect the
675 * capabilities of the host cpu.
677 static u32 msrs_to_save
[] = {
678 MSR_IA32_SYSENTER_CS
, MSR_IA32_SYSENTER_ESP
, MSR_IA32_SYSENTER_EIP
,
681 MSR_CSTAR
, MSR_KERNEL_GS_BASE
, MSR_SYSCALL_MASK
, MSR_LSTAR
,
683 MSR_IA32_TIME_STAMP_COUNTER
, MSR_KVM_SYSTEM_TIME
, MSR_KVM_WALL_CLOCK
,
684 MSR_IA32_PERF_STATUS
,
687 static unsigned num_msrs_to_save
;
689 static u32 emulated_msrs
[] = {
690 MSR_IA32_MISC_ENABLE
,
693 static void set_efer(struct kvm_vcpu
*vcpu
, u64 efer
)
695 if (efer
& efer_reserved_bits
) {
696 printk(KERN_DEBUG
"set_efer: 0x%llx #GP, reserved bits\n",
698 kvm_inject_gp(vcpu
, 0);
703 && (vcpu
->arch
.shadow_efer
& EFER_LME
) != (efer
& EFER_LME
)) {
704 printk(KERN_DEBUG
"set_efer: #GP, change LME while paging\n");
705 kvm_inject_gp(vcpu
, 0);
709 kvm_x86_ops
->set_efer(vcpu
, efer
);
712 efer
|= vcpu
->arch
.shadow_efer
& EFER_LMA
;
714 vcpu
->arch
.shadow_efer
= efer
;
717 void kvm_enable_efer_bits(u64 mask
)
719 efer_reserved_bits
&= ~mask
;
721 EXPORT_SYMBOL_GPL(kvm_enable_efer_bits
);
725 * Writes msr value into into the appropriate "register".
726 * Returns 0 on success, non-0 otherwise.
727 * Assumes vcpu_load() was already called.
729 int kvm_set_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64 data
)
731 return kvm_x86_ops
->set_msr(vcpu
, msr_index
, data
);
735 * Adapt set_msr() to msr_io()'s calling convention
737 static int do_set_msr(struct kvm_vcpu
*vcpu
, unsigned index
, u64
*data
)
739 return kvm_set_msr(vcpu
, index
, *data
);
742 static void kvm_write_wall_clock(struct kvm
*kvm
, gpa_t wall_clock
)
745 struct pvclock_wall_clock wc
;
746 struct timespec now
, sys
, boot
;
753 kvm_write_guest(kvm
, wall_clock
, &version
, sizeof(version
));
756 * The guest calculates current wall clock time by adding
757 * system time (updated by kvm_write_guest_time below) to the
758 * wall clock specified here. guest system time equals host
759 * system time for us, thus we must fill in host boot time here.
761 now
= current_kernel_time();
763 boot
= ns_to_timespec(timespec_to_ns(&now
) - timespec_to_ns(&sys
));
765 wc
.sec
= boot
.tv_sec
;
766 wc
.nsec
= boot
.tv_nsec
;
767 wc
.version
= version
;
769 kvm_write_guest(kvm
, wall_clock
, &wc
, sizeof(wc
));
772 kvm_write_guest(kvm
, wall_clock
, &version
, sizeof(version
));
775 static uint32_t div_frac(uint32_t dividend
, uint32_t divisor
)
777 uint32_t quotient
, remainder
;
779 /* Don't try to replace with do_div(), this one calculates
780 * "(dividend << 32) / divisor" */
782 : "=a" (quotient
), "=d" (remainder
)
783 : "0" (0), "1" (dividend
), "r" (divisor
) );
787 static void kvm_set_time_scale(uint32_t tsc_khz
, struct pvclock_vcpu_time_info
*hv_clock
)
789 uint64_t nsecs
= 1000000000LL;
794 tps64
= tsc_khz
* 1000LL;
795 while (tps64
> nsecs
*2) {
800 tps32
= (uint32_t)tps64
;
801 while (tps32
<= (uint32_t)nsecs
) {
806 hv_clock
->tsc_shift
= shift
;
807 hv_clock
->tsc_to_system_mul
= div_frac(nsecs
, tps32
);
809 pr_debug("%s: tsc_khz %u, tsc_shift %d, tsc_mul %u\n",
810 __FUNCTION__
, tsc_khz
, hv_clock
->tsc_shift
,
811 hv_clock
->tsc_to_system_mul
);
814 static void kvm_write_guest_time(struct kvm_vcpu
*v
)
818 struct kvm_vcpu_arch
*vcpu
= &v
->arch
;
821 if ((!vcpu
->time_page
))
824 if (unlikely(vcpu
->hv_clock_tsc_khz
!= tsc_khz
)) {
825 kvm_set_time_scale(tsc_khz
, &vcpu
->hv_clock
);
826 vcpu
->hv_clock_tsc_khz
= tsc_khz
;
829 /* Keep irq disabled to prevent changes to the clock */
830 local_irq_save(flags
);
831 kvm_get_msr(v
, MSR_IA32_TIME_STAMP_COUNTER
,
832 &vcpu
->hv_clock
.tsc_timestamp
);
834 local_irq_restore(flags
);
836 /* With all the info we got, fill in the values */
838 vcpu
->hv_clock
.system_time
= ts
.tv_nsec
+
839 (NSEC_PER_SEC
* (u64
)ts
.tv_sec
);
841 * The interface expects us to write an even number signaling that the
842 * update is finished. Since the guest won't see the intermediate
843 * state, we just increase by 2 at the end.
845 vcpu
->hv_clock
.version
+= 2;
847 shared_kaddr
= kmap_atomic(vcpu
->time_page
, KM_USER0
);
849 memcpy(shared_kaddr
+ vcpu
->time_offset
, &vcpu
->hv_clock
,
850 sizeof(vcpu
->hv_clock
));
852 kunmap_atomic(shared_kaddr
, KM_USER0
);
854 mark_page_dirty(v
->kvm
, vcpu
->time
>> PAGE_SHIFT
);
857 static bool msr_mtrr_valid(unsigned msr
)
860 case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR
- 1:
861 case MSR_MTRRfix64K_00000
:
862 case MSR_MTRRfix16K_80000
:
863 case MSR_MTRRfix16K_A0000
:
864 case MSR_MTRRfix4K_C0000
:
865 case MSR_MTRRfix4K_C8000
:
866 case MSR_MTRRfix4K_D0000
:
867 case MSR_MTRRfix4K_D8000
:
868 case MSR_MTRRfix4K_E0000
:
869 case MSR_MTRRfix4K_E8000
:
870 case MSR_MTRRfix4K_F0000
:
871 case MSR_MTRRfix4K_F8000
:
872 case MSR_MTRRdefType
:
873 case MSR_IA32_CR_PAT
:
881 static int set_msr_mtrr(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
883 if (!msr_mtrr_valid(msr
))
886 vcpu
->arch
.mtrr
[msr
- 0x200] = data
;
890 int kvm_set_msr_common(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
894 set_efer(vcpu
, data
);
896 case MSR_IA32_MC0_STATUS
:
897 pr_unimpl(vcpu
, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n",
900 case MSR_IA32_MCG_STATUS
:
901 pr_unimpl(vcpu
, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n",
904 case MSR_IA32_MCG_CTL
:
905 pr_unimpl(vcpu
, "%s: MSR_IA32_MCG_CTL 0x%llx, nop\n",
908 case MSR_IA32_DEBUGCTLMSR
:
910 /* We support the non-activated case already */
912 } else if (data
& ~(DEBUGCTLMSR_LBR
| DEBUGCTLMSR_BTF
)) {
913 /* Values other than LBR and BTF are vendor-specific,
914 thus reserved and should throw a #GP */
917 pr_unimpl(vcpu
, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n",
920 case MSR_IA32_UCODE_REV
:
921 case MSR_IA32_UCODE_WRITE
:
923 case 0x200 ... 0x2ff:
924 return set_msr_mtrr(vcpu
, msr
, data
);
925 case MSR_IA32_APICBASE
:
926 kvm_set_apic_base(vcpu
, data
);
928 case MSR_IA32_MISC_ENABLE
:
929 vcpu
->arch
.ia32_misc_enable_msr
= data
;
931 case MSR_KVM_WALL_CLOCK
:
932 vcpu
->kvm
->arch
.wall_clock
= data
;
933 kvm_write_wall_clock(vcpu
->kvm
, data
);
935 case MSR_KVM_SYSTEM_TIME
: {
936 if (vcpu
->arch
.time_page
) {
937 kvm_release_page_dirty(vcpu
->arch
.time_page
);
938 vcpu
->arch
.time_page
= NULL
;
941 vcpu
->arch
.time
= data
;
943 /* we verify if the enable bit is set... */
947 /* ...but clean it before doing the actual write */
948 vcpu
->arch
.time_offset
= data
& ~(PAGE_MASK
| 1);
950 vcpu
->arch
.time_page
=
951 gfn_to_page(vcpu
->kvm
, data
>> PAGE_SHIFT
);
953 if (is_error_page(vcpu
->arch
.time_page
)) {
954 kvm_release_page_clean(vcpu
->arch
.time_page
);
955 vcpu
->arch
.time_page
= NULL
;
958 kvm_write_guest_time(vcpu
);
962 pr_unimpl(vcpu
, "unhandled wrmsr: 0x%x data %llx\n", msr
, data
);
967 EXPORT_SYMBOL_GPL(kvm_set_msr_common
);
971 * Reads an msr value (of 'msr_index') into 'pdata'.
972 * Returns 0 on success, non-0 otherwise.
973 * Assumes vcpu_load() was already called.
975 int kvm_get_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64
*pdata
)
977 return kvm_x86_ops
->get_msr(vcpu
, msr_index
, pdata
);
980 static int get_msr_mtrr(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
)
982 if (!msr_mtrr_valid(msr
))
985 *pdata
= vcpu
->arch
.mtrr
[msr
- 0x200];
989 int kvm_get_msr_common(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
)
994 case 0xc0010010: /* SYSCFG */
995 case 0xc0010015: /* HWCR */
996 case MSR_IA32_PLATFORM_ID
:
997 case MSR_IA32_P5_MC_ADDR
:
998 case MSR_IA32_P5_MC_TYPE
:
999 case MSR_IA32_MC0_CTL
:
1000 case MSR_IA32_MCG_STATUS
:
1001 case MSR_IA32_MCG_CAP
:
1002 case MSR_IA32_MCG_CTL
:
1003 case MSR_IA32_MC0_MISC
:
1004 case MSR_IA32_MC0_MISC
+4:
1005 case MSR_IA32_MC0_MISC
+8:
1006 case MSR_IA32_MC0_MISC
+12:
1007 case MSR_IA32_MC0_MISC
+16:
1008 case MSR_IA32_MC0_MISC
+20:
1009 case MSR_IA32_UCODE_REV
:
1010 case MSR_IA32_EBL_CR_POWERON
:
1011 case MSR_IA32_DEBUGCTLMSR
:
1012 case MSR_IA32_LASTBRANCHFROMIP
:
1013 case MSR_IA32_LASTBRANCHTOIP
:
1014 case MSR_IA32_LASTINTFROMIP
:
1015 case MSR_IA32_LASTINTTOIP
:
1019 data
= 0x500 | KVM_NR_VAR_MTRR
;
1021 case 0x200 ... 0x2ff:
1022 return get_msr_mtrr(vcpu
, msr
, pdata
);
1023 case 0xcd: /* fsb frequency */
1026 case MSR_IA32_APICBASE
:
1027 data
= kvm_get_apic_base(vcpu
);
1029 case MSR_IA32_MISC_ENABLE
:
1030 data
= vcpu
->arch
.ia32_misc_enable_msr
;
1032 case MSR_IA32_PERF_STATUS
:
1033 /* TSC increment by tick */
1035 /* CPU multiplier */
1036 data
|= (((uint64_t)4ULL) << 40);
1039 data
= vcpu
->arch
.shadow_efer
;
1041 case MSR_KVM_WALL_CLOCK
:
1042 data
= vcpu
->kvm
->arch
.wall_clock
;
1044 case MSR_KVM_SYSTEM_TIME
:
1045 data
= vcpu
->arch
.time
;
1048 pr_unimpl(vcpu
, "unhandled rdmsr: 0x%x\n", msr
);
1054 EXPORT_SYMBOL_GPL(kvm_get_msr_common
);
1057 * Read or write a bunch of msrs. All parameters are kernel addresses.
1059 * @return number of msrs set successfully.
1061 static int __msr_io(struct kvm_vcpu
*vcpu
, struct kvm_msrs
*msrs
,
1062 struct kvm_msr_entry
*entries
,
1063 int (*do_msr
)(struct kvm_vcpu
*vcpu
,
1064 unsigned index
, u64
*data
))
1070 down_read(&vcpu
->kvm
->slots_lock
);
1071 for (i
= 0; i
< msrs
->nmsrs
; ++i
)
1072 if (do_msr(vcpu
, entries
[i
].index
, &entries
[i
].data
))
1074 up_read(&vcpu
->kvm
->slots_lock
);
1082 * Read or write a bunch of msrs. Parameters are user addresses.
1084 * @return number of msrs set successfully.
1086 static int msr_io(struct kvm_vcpu
*vcpu
, struct kvm_msrs __user
*user_msrs
,
1087 int (*do_msr
)(struct kvm_vcpu
*vcpu
,
1088 unsigned index
, u64
*data
),
1091 struct kvm_msrs msrs
;
1092 struct kvm_msr_entry
*entries
;
1097 if (copy_from_user(&msrs
, user_msrs
, sizeof msrs
))
1101 if (msrs
.nmsrs
>= MAX_IO_MSRS
)
1105 size
= sizeof(struct kvm_msr_entry
) * msrs
.nmsrs
;
1106 entries
= vmalloc(size
);
1111 if (copy_from_user(entries
, user_msrs
->entries
, size
))
1114 r
= n
= __msr_io(vcpu
, &msrs
, entries
, do_msr
);
1119 if (writeback
&& copy_to_user(user_msrs
->entries
, entries
, size
))
1130 int kvm_dev_ioctl_check_extension(long ext
)
1135 case KVM_CAP_IRQCHIP
:
1137 case KVM_CAP_MMU_SHADOW_CACHE_CONTROL
:
1138 case KVM_CAP_USER_MEMORY
:
1139 case KVM_CAP_SET_TSS_ADDR
:
1140 case KVM_CAP_EXT_CPUID
:
1141 case KVM_CAP_CLOCKSOURCE
:
1143 case KVM_CAP_NOP_IO_DELAY
:
1144 case KVM_CAP_MP_STATE
:
1145 case KVM_CAP_SYNC_MMU
:
1148 case KVM_CAP_COALESCED_MMIO
:
1149 r
= KVM_COALESCED_MMIO_PAGE_OFFSET
;
1152 r
= !kvm_x86_ops
->cpu_has_accelerated_tpr();
1154 case KVM_CAP_NR_VCPUS
:
1157 case KVM_CAP_NR_MEMSLOTS
:
1158 r
= KVM_MEMORY_SLOTS
;
1160 case KVM_CAP_PV_MMU
:
1164 r
= intel_iommu_found();
1174 long kvm_arch_dev_ioctl(struct file
*filp
,
1175 unsigned int ioctl
, unsigned long arg
)
1177 void __user
*argp
= (void __user
*)arg
;
1181 case KVM_GET_MSR_INDEX_LIST
: {
1182 struct kvm_msr_list __user
*user_msr_list
= argp
;
1183 struct kvm_msr_list msr_list
;
1187 if (copy_from_user(&msr_list
, user_msr_list
, sizeof msr_list
))
1190 msr_list
.nmsrs
= num_msrs_to_save
+ ARRAY_SIZE(emulated_msrs
);
1191 if (copy_to_user(user_msr_list
, &msr_list
, sizeof msr_list
))
1194 if (n
< num_msrs_to_save
)
1197 if (copy_to_user(user_msr_list
->indices
, &msrs_to_save
,
1198 num_msrs_to_save
* sizeof(u32
)))
1200 if (copy_to_user(user_msr_list
->indices
1201 + num_msrs_to_save
* sizeof(u32
),
1203 ARRAY_SIZE(emulated_msrs
) * sizeof(u32
)))
1208 case KVM_GET_SUPPORTED_CPUID
: {
1209 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
1210 struct kvm_cpuid2 cpuid
;
1213 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1215 r
= kvm_dev_ioctl_get_supported_cpuid(&cpuid
,
1216 cpuid_arg
->entries
);
1221 if (copy_to_user(cpuid_arg
, &cpuid
, sizeof cpuid
))
1233 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
)
1235 kvm_x86_ops
->vcpu_load(vcpu
, cpu
);
1236 kvm_write_guest_time(vcpu
);
1239 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
)
1241 kvm_x86_ops
->vcpu_put(vcpu
);
1242 kvm_put_guest_fpu(vcpu
);
1245 static int is_efer_nx(void)
1249 rdmsrl(MSR_EFER
, efer
);
1250 return efer
& EFER_NX
;
1253 static void cpuid_fix_nx_cap(struct kvm_vcpu
*vcpu
)
1256 struct kvm_cpuid_entry2
*e
, *entry
;
1259 for (i
= 0; i
< vcpu
->arch
.cpuid_nent
; ++i
) {
1260 e
= &vcpu
->arch
.cpuid_entries
[i
];
1261 if (e
->function
== 0x80000001) {
1266 if (entry
&& (entry
->edx
& (1 << 20)) && !is_efer_nx()) {
1267 entry
->edx
&= ~(1 << 20);
1268 printk(KERN_INFO
"kvm: guest NX capability removed\n");
1272 /* when an old userspace process fills a new kernel module */
1273 static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu
*vcpu
,
1274 struct kvm_cpuid
*cpuid
,
1275 struct kvm_cpuid_entry __user
*entries
)
1278 struct kvm_cpuid_entry
*cpuid_entries
;
1281 if (cpuid
->nent
> KVM_MAX_CPUID_ENTRIES
)
1284 cpuid_entries
= vmalloc(sizeof(struct kvm_cpuid_entry
) * cpuid
->nent
);
1288 if (copy_from_user(cpuid_entries
, entries
,
1289 cpuid
->nent
* sizeof(struct kvm_cpuid_entry
)))
1291 for (i
= 0; i
< cpuid
->nent
; i
++) {
1292 vcpu
->arch
.cpuid_entries
[i
].function
= cpuid_entries
[i
].function
;
1293 vcpu
->arch
.cpuid_entries
[i
].eax
= cpuid_entries
[i
].eax
;
1294 vcpu
->arch
.cpuid_entries
[i
].ebx
= cpuid_entries
[i
].ebx
;
1295 vcpu
->arch
.cpuid_entries
[i
].ecx
= cpuid_entries
[i
].ecx
;
1296 vcpu
->arch
.cpuid_entries
[i
].edx
= cpuid_entries
[i
].edx
;
1297 vcpu
->arch
.cpuid_entries
[i
].index
= 0;
1298 vcpu
->arch
.cpuid_entries
[i
].flags
= 0;
1299 vcpu
->arch
.cpuid_entries
[i
].padding
[0] = 0;
1300 vcpu
->arch
.cpuid_entries
[i
].padding
[1] = 0;
1301 vcpu
->arch
.cpuid_entries
[i
].padding
[2] = 0;
1303 vcpu
->arch
.cpuid_nent
= cpuid
->nent
;
1304 cpuid_fix_nx_cap(vcpu
);
1308 vfree(cpuid_entries
);
1313 static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu
*vcpu
,
1314 struct kvm_cpuid2
*cpuid
,
1315 struct kvm_cpuid_entry2 __user
*entries
)
1320 if (cpuid
->nent
> KVM_MAX_CPUID_ENTRIES
)
1323 if (copy_from_user(&vcpu
->arch
.cpuid_entries
, entries
,
1324 cpuid
->nent
* sizeof(struct kvm_cpuid_entry2
)))
1326 vcpu
->arch
.cpuid_nent
= cpuid
->nent
;
1333 static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu
*vcpu
,
1334 struct kvm_cpuid2
*cpuid
,
1335 struct kvm_cpuid_entry2 __user
*entries
)
1340 if (cpuid
->nent
< vcpu
->arch
.cpuid_nent
)
1343 if (copy_to_user(entries
, &vcpu
->arch
.cpuid_entries
,
1344 vcpu
->arch
.cpuid_nent
* sizeof(struct kvm_cpuid_entry2
)))
1349 cpuid
->nent
= vcpu
->arch
.cpuid_nent
;
1353 static inline u32
bit(int bitno
)
1355 return 1 << (bitno
& 31);
1358 static void do_cpuid_1_ent(struct kvm_cpuid_entry2
*entry
, u32 function
,
1361 entry
->function
= function
;
1362 entry
->index
= index
;
1363 cpuid_count(entry
->function
, entry
->index
,
1364 &entry
->eax
, &entry
->ebx
, &entry
->ecx
, &entry
->edx
);
1368 static void do_cpuid_ent(struct kvm_cpuid_entry2
*entry
, u32 function
,
1369 u32 index
, int *nent
, int maxnent
)
1371 const u32 kvm_supported_word0_x86_features
= bit(X86_FEATURE_FPU
) |
1372 bit(X86_FEATURE_VME
) | bit(X86_FEATURE_DE
) |
1373 bit(X86_FEATURE_PSE
) | bit(X86_FEATURE_TSC
) |
1374 bit(X86_FEATURE_MSR
) | bit(X86_FEATURE_PAE
) |
1375 bit(X86_FEATURE_CX8
) | bit(X86_FEATURE_APIC
) |
1376 bit(X86_FEATURE_SEP
) | bit(X86_FEATURE_PGE
) |
1377 bit(X86_FEATURE_CMOV
) | bit(X86_FEATURE_PSE36
) |
1378 bit(X86_FEATURE_CLFLSH
) | bit(X86_FEATURE_MMX
) |
1379 bit(X86_FEATURE_FXSR
) | bit(X86_FEATURE_XMM
) |
1380 bit(X86_FEATURE_XMM2
) | bit(X86_FEATURE_SELFSNOOP
);
1381 const u32 kvm_supported_word1_x86_features
= bit(X86_FEATURE_FPU
) |
1382 bit(X86_FEATURE_VME
) | bit(X86_FEATURE_DE
) |
1383 bit(X86_FEATURE_PSE
) | bit(X86_FEATURE_TSC
) |
1384 bit(X86_FEATURE_MSR
) | bit(X86_FEATURE_PAE
) |
1385 bit(X86_FEATURE_CX8
) | bit(X86_FEATURE_APIC
) |
1386 bit(X86_FEATURE_PGE
) |
1387 bit(X86_FEATURE_CMOV
) | bit(X86_FEATURE_PSE36
) |
1388 bit(X86_FEATURE_MMX
) | bit(X86_FEATURE_FXSR
) |
1389 bit(X86_FEATURE_SYSCALL
) |
1390 (bit(X86_FEATURE_NX
) && is_efer_nx()) |
1391 #ifdef CONFIG_X86_64
1392 bit(X86_FEATURE_LM
) |
1394 bit(X86_FEATURE_MMXEXT
) |
1395 bit(X86_FEATURE_3DNOWEXT
) |
1396 bit(X86_FEATURE_3DNOW
);
1397 const u32 kvm_supported_word3_x86_features
=
1398 bit(X86_FEATURE_XMM3
) | bit(X86_FEATURE_CX16
);
1399 const u32 kvm_supported_word6_x86_features
=
1400 bit(X86_FEATURE_LAHF_LM
) | bit(X86_FEATURE_CMP_LEGACY
);
1402 /* all func 2 cpuid_count() should be called on the same cpu */
1404 do_cpuid_1_ent(entry
, function
, index
);
1409 entry
->eax
= min(entry
->eax
, (u32
)0xb);
1412 entry
->edx
&= kvm_supported_word0_x86_features
;
1413 entry
->ecx
&= kvm_supported_word3_x86_features
;
1415 /* function 2 entries are STATEFUL. That is, repeated cpuid commands
1416 * may return different values. This forces us to get_cpu() before
1417 * issuing the first command, and also to emulate this annoying behavior
1418 * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */
1420 int t
, times
= entry
->eax
& 0xff;
1422 entry
->flags
|= KVM_CPUID_FLAG_STATEFUL_FUNC
;
1423 for (t
= 1; t
< times
&& *nent
< maxnent
; ++t
) {
1424 do_cpuid_1_ent(&entry
[t
], function
, 0);
1425 entry
[t
].flags
|= KVM_CPUID_FLAG_STATEFUL_FUNC
;
1430 /* function 4 and 0xb have additional index. */
1434 entry
->flags
|= KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1435 /* read more entries until cache_type is zero */
1436 for (i
= 1; *nent
< maxnent
; ++i
) {
1437 cache_type
= entry
[i
- 1].eax
& 0x1f;
1440 do_cpuid_1_ent(&entry
[i
], function
, i
);
1442 KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1450 entry
->flags
|= KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1451 /* read more entries until level_type is zero */
1452 for (i
= 1; *nent
< maxnent
; ++i
) {
1453 level_type
= entry
[i
- 1].ecx
& 0xff;
1456 do_cpuid_1_ent(&entry
[i
], function
, i
);
1458 KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1464 entry
->eax
= min(entry
->eax
, 0x8000001a);
1467 entry
->edx
&= kvm_supported_word1_x86_features
;
1468 entry
->ecx
&= kvm_supported_word6_x86_features
;
1474 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2
*cpuid
,
1475 struct kvm_cpuid_entry2 __user
*entries
)
1477 struct kvm_cpuid_entry2
*cpuid_entries
;
1478 int limit
, nent
= 0, r
= -E2BIG
;
1481 if (cpuid
->nent
< 1)
1484 cpuid_entries
= vmalloc(sizeof(struct kvm_cpuid_entry2
) * cpuid
->nent
);
1488 do_cpuid_ent(&cpuid_entries
[0], 0, 0, &nent
, cpuid
->nent
);
1489 limit
= cpuid_entries
[0].eax
;
1490 for (func
= 1; func
<= limit
&& nent
< cpuid
->nent
; ++func
)
1491 do_cpuid_ent(&cpuid_entries
[nent
], func
, 0,
1492 &nent
, cpuid
->nent
);
1494 if (nent
>= cpuid
->nent
)
1497 do_cpuid_ent(&cpuid_entries
[nent
], 0x80000000, 0, &nent
, cpuid
->nent
);
1498 limit
= cpuid_entries
[nent
- 1].eax
;
1499 for (func
= 0x80000001; func
<= limit
&& nent
< cpuid
->nent
; ++func
)
1500 do_cpuid_ent(&cpuid_entries
[nent
], func
, 0,
1501 &nent
, cpuid
->nent
);
1503 if (copy_to_user(entries
, cpuid_entries
,
1504 nent
* sizeof(struct kvm_cpuid_entry2
)))
1510 vfree(cpuid_entries
);
1515 static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu
*vcpu
,
1516 struct kvm_lapic_state
*s
)
1519 memcpy(s
->regs
, vcpu
->arch
.apic
->regs
, sizeof *s
);
1525 static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu
*vcpu
,
1526 struct kvm_lapic_state
*s
)
1529 memcpy(vcpu
->arch
.apic
->regs
, s
->regs
, sizeof *s
);
1530 kvm_apic_post_state_restore(vcpu
);
1536 static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu
*vcpu
,
1537 struct kvm_interrupt
*irq
)
1539 if (irq
->irq
< 0 || irq
->irq
>= 256)
1541 if (irqchip_in_kernel(vcpu
->kvm
))
1545 set_bit(irq
->irq
, vcpu
->arch
.irq_pending
);
1546 set_bit(irq
->irq
/ BITS_PER_LONG
, &vcpu
->arch
.irq_summary
);
1553 static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu
*vcpu
,
1554 struct kvm_tpr_access_ctl
*tac
)
1558 vcpu
->arch
.tpr_access_reporting
= !!tac
->enabled
;
1562 long kvm_arch_vcpu_ioctl(struct file
*filp
,
1563 unsigned int ioctl
, unsigned long arg
)
1565 struct kvm_vcpu
*vcpu
= filp
->private_data
;
1566 void __user
*argp
= (void __user
*)arg
;
1568 struct kvm_lapic_state
*lapic
= NULL
;
1571 case KVM_GET_LAPIC
: {
1572 lapic
= kzalloc(sizeof(struct kvm_lapic_state
), GFP_KERNEL
);
1577 r
= kvm_vcpu_ioctl_get_lapic(vcpu
, lapic
);
1581 if (copy_to_user(argp
, lapic
, sizeof(struct kvm_lapic_state
)))
1586 case KVM_SET_LAPIC
: {
1587 lapic
= kmalloc(sizeof(struct kvm_lapic_state
), GFP_KERNEL
);
1592 if (copy_from_user(lapic
, argp
, sizeof(struct kvm_lapic_state
)))
1594 r
= kvm_vcpu_ioctl_set_lapic(vcpu
, lapic
);
1600 case KVM_INTERRUPT
: {
1601 struct kvm_interrupt irq
;
1604 if (copy_from_user(&irq
, argp
, sizeof irq
))
1606 r
= kvm_vcpu_ioctl_interrupt(vcpu
, &irq
);
1612 case KVM_SET_CPUID
: {
1613 struct kvm_cpuid __user
*cpuid_arg
= argp
;
1614 struct kvm_cpuid cpuid
;
1617 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1619 r
= kvm_vcpu_ioctl_set_cpuid(vcpu
, &cpuid
, cpuid_arg
->entries
);
1624 case KVM_SET_CPUID2
: {
1625 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
1626 struct kvm_cpuid2 cpuid
;
1629 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1631 r
= kvm_vcpu_ioctl_set_cpuid2(vcpu
, &cpuid
,
1632 cpuid_arg
->entries
);
1637 case KVM_GET_CPUID2
: {
1638 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
1639 struct kvm_cpuid2 cpuid
;
1642 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1644 r
= kvm_vcpu_ioctl_get_cpuid2(vcpu
, &cpuid
,
1645 cpuid_arg
->entries
);
1649 if (copy_to_user(cpuid_arg
, &cpuid
, sizeof cpuid
))
1655 r
= msr_io(vcpu
, argp
, kvm_get_msr
, 1);
1658 r
= msr_io(vcpu
, argp
, do_set_msr
, 0);
1660 case KVM_TPR_ACCESS_REPORTING
: {
1661 struct kvm_tpr_access_ctl tac
;
1664 if (copy_from_user(&tac
, argp
, sizeof tac
))
1666 r
= vcpu_ioctl_tpr_access_reporting(vcpu
, &tac
);
1670 if (copy_to_user(argp
, &tac
, sizeof tac
))
1675 case KVM_SET_VAPIC_ADDR
: {
1676 struct kvm_vapic_addr va
;
1679 if (!irqchip_in_kernel(vcpu
->kvm
))
1682 if (copy_from_user(&va
, argp
, sizeof va
))
1685 kvm_lapic_set_vapic_addr(vcpu
, va
.vapic_addr
);
1697 static int kvm_vm_ioctl_set_tss_addr(struct kvm
*kvm
, unsigned long addr
)
1701 if (addr
> (unsigned int)(-3 * PAGE_SIZE
))
1703 ret
= kvm_x86_ops
->set_tss_addr(kvm
, addr
);
1707 static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm
*kvm
,
1708 u32 kvm_nr_mmu_pages
)
1710 if (kvm_nr_mmu_pages
< KVM_MIN_ALLOC_MMU_PAGES
)
1713 down_write(&kvm
->slots_lock
);
1715 kvm_mmu_change_mmu_pages(kvm
, kvm_nr_mmu_pages
);
1716 kvm
->arch
.n_requested_mmu_pages
= kvm_nr_mmu_pages
;
1718 up_write(&kvm
->slots_lock
);
1722 static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm
*kvm
)
1724 return kvm
->arch
.n_alloc_mmu_pages
;
1727 gfn_t
unalias_gfn(struct kvm
*kvm
, gfn_t gfn
)
1730 struct kvm_mem_alias
*alias
;
1732 for (i
= 0; i
< kvm
->arch
.naliases
; ++i
) {
1733 alias
= &kvm
->arch
.aliases
[i
];
1734 if (gfn
>= alias
->base_gfn
1735 && gfn
< alias
->base_gfn
+ alias
->npages
)
1736 return alias
->target_gfn
+ gfn
- alias
->base_gfn
;
1742 * Set a new alias region. Aliases map a portion of physical memory into
1743 * another portion. This is useful for memory windows, for example the PC
1746 static int kvm_vm_ioctl_set_memory_alias(struct kvm
*kvm
,
1747 struct kvm_memory_alias
*alias
)
1750 struct kvm_mem_alias
*p
;
1753 /* General sanity checks */
1754 if (alias
->memory_size
& (PAGE_SIZE
- 1))
1756 if (alias
->guest_phys_addr
& (PAGE_SIZE
- 1))
1758 if (alias
->slot
>= KVM_ALIAS_SLOTS
)
1760 if (alias
->guest_phys_addr
+ alias
->memory_size
1761 < alias
->guest_phys_addr
)
1763 if (alias
->target_phys_addr
+ alias
->memory_size
1764 < alias
->target_phys_addr
)
1767 down_write(&kvm
->slots_lock
);
1768 spin_lock(&kvm
->mmu_lock
);
1770 p
= &kvm
->arch
.aliases
[alias
->slot
];
1771 p
->base_gfn
= alias
->guest_phys_addr
>> PAGE_SHIFT
;
1772 p
->npages
= alias
->memory_size
>> PAGE_SHIFT
;
1773 p
->target_gfn
= alias
->target_phys_addr
>> PAGE_SHIFT
;
1775 for (n
= KVM_ALIAS_SLOTS
; n
> 0; --n
)
1776 if (kvm
->arch
.aliases
[n
- 1].npages
)
1778 kvm
->arch
.naliases
= n
;
1780 spin_unlock(&kvm
->mmu_lock
);
1781 kvm_mmu_zap_all(kvm
);
1783 up_write(&kvm
->slots_lock
);
1791 static int kvm_vm_ioctl_get_irqchip(struct kvm
*kvm
, struct kvm_irqchip
*chip
)
1796 switch (chip
->chip_id
) {
1797 case KVM_IRQCHIP_PIC_MASTER
:
1798 memcpy(&chip
->chip
.pic
,
1799 &pic_irqchip(kvm
)->pics
[0],
1800 sizeof(struct kvm_pic_state
));
1802 case KVM_IRQCHIP_PIC_SLAVE
:
1803 memcpy(&chip
->chip
.pic
,
1804 &pic_irqchip(kvm
)->pics
[1],
1805 sizeof(struct kvm_pic_state
));
1807 case KVM_IRQCHIP_IOAPIC
:
1808 memcpy(&chip
->chip
.ioapic
,
1809 ioapic_irqchip(kvm
),
1810 sizeof(struct kvm_ioapic_state
));
1819 static int kvm_vm_ioctl_set_irqchip(struct kvm
*kvm
, struct kvm_irqchip
*chip
)
1824 switch (chip
->chip_id
) {
1825 case KVM_IRQCHIP_PIC_MASTER
:
1826 memcpy(&pic_irqchip(kvm
)->pics
[0],
1828 sizeof(struct kvm_pic_state
));
1830 case KVM_IRQCHIP_PIC_SLAVE
:
1831 memcpy(&pic_irqchip(kvm
)->pics
[1],
1833 sizeof(struct kvm_pic_state
));
1835 case KVM_IRQCHIP_IOAPIC
:
1836 memcpy(ioapic_irqchip(kvm
),
1838 sizeof(struct kvm_ioapic_state
));
1844 kvm_pic_update_irq(pic_irqchip(kvm
));
1848 static int kvm_vm_ioctl_get_pit(struct kvm
*kvm
, struct kvm_pit_state
*ps
)
1852 memcpy(ps
, &kvm
->arch
.vpit
->pit_state
, sizeof(struct kvm_pit_state
));
1856 static int kvm_vm_ioctl_set_pit(struct kvm
*kvm
, struct kvm_pit_state
*ps
)
1860 memcpy(&kvm
->arch
.vpit
->pit_state
, ps
, sizeof(struct kvm_pit_state
));
1861 kvm_pit_load_count(kvm
, 0, ps
->channels
[0].count
);
1866 * Get (and clear) the dirty memory log for a memory slot.
1868 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
,
1869 struct kvm_dirty_log
*log
)
1873 struct kvm_memory_slot
*memslot
;
1876 down_write(&kvm
->slots_lock
);
1878 r
= kvm_get_dirty_log(kvm
, log
, &is_dirty
);
1882 /* If nothing is dirty, don't bother messing with page tables. */
1884 kvm_mmu_slot_remove_write_access(kvm
, log
->slot
);
1885 kvm_flush_remote_tlbs(kvm
);
1886 memslot
= &kvm
->memslots
[log
->slot
];
1887 n
= ALIGN(memslot
->npages
, BITS_PER_LONG
) / 8;
1888 memset(memslot
->dirty_bitmap
, 0, n
);
1892 up_write(&kvm
->slots_lock
);
1896 long kvm_arch_vm_ioctl(struct file
*filp
,
1897 unsigned int ioctl
, unsigned long arg
)
1899 struct kvm
*kvm
= filp
->private_data
;
1900 void __user
*argp
= (void __user
*)arg
;
1903 * This union makes it completely explicit to gcc-3.x
1904 * that these two variables' stack usage should be
1905 * combined, not added together.
1908 struct kvm_pit_state ps
;
1909 struct kvm_memory_alias alias
;
1913 case KVM_SET_TSS_ADDR
:
1914 r
= kvm_vm_ioctl_set_tss_addr(kvm
, arg
);
1918 case KVM_SET_MEMORY_REGION
: {
1919 struct kvm_memory_region kvm_mem
;
1920 struct kvm_userspace_memory_region kvm_userspace_mem
;
1923 if (copy_from_user(&kvm_mem
, argp
, sizeof kvm_mem
))
1925 kvm_userspace_mem
.slot
= kvm_mem
.slot
;
1926 kvm_userspace_mem
.flags
= kvm_mem
.flags
;
1927 kvm_userspace_mem
.guest_phys_addr
= kvm_mem
.guest_phys_addr
;
1928 kvm_userspace_mem
.memory_size
= kvm_mem
.memory_size
;
1929 r
= kvm_vm_ioctl_set_memory_region(kvm
, &kvm_userspace_mem
, 0);
1934 case KVM_SET_NR_MMU_PAGES
:
1935 r
= kvm_vm_ioctl_set_nr_mmu_pages(kvm
, arg
);
1939 case KVM_GET_NR_MMU_PAGES
:
1940 r
= kvm_vm_ioctl_get_nr_mmu_pages(kvm
);
1942 case KVM_SET_MEMORY_ALIAS
:
1944 if (copy_from_user(&u
.alias
, argp
, sizeof(struct kvm_memory_alias
)))
1946 r
= kvm_vm_ioctl_set_memory_alias(kvm
, &u
.alias
);
1950 case KVM_CREATE_IRQCHIP
:
1952 kvm
->arch
.vpic
= kvm_create_pic(kvm
);
1953 if (kvm
->arch
.vpic
) {
1954 r
= kvm_ioapic_init(kvm
);
1956 kfree(kvm
->arch
.vpic
);
1957 kvm
->arch
.vpic
= NULL
;
1963 case KVM_CREATE_PIT
:
1965 kvm
->arch
.vpit
= kvm_create_pit(kvm
);
1969 case KVM_IRQ_LINE
: {
1970 struct kvm_irq_level irq_event
;
1973 if (copy_from_user(&irq_event
, argp
, sizeof irq_event
))
1975 if (irqchip_in_kernel(kvm
)) {
1976 mutex_lock(&kvm
->lock
);
1977 kvm_set_irq(kvm
, irq_event
.irq
, irq_event
.level
);
1978 mutex_unlock(&kvm
->lock
);
1983 case KVM_GET_IRQCHIP
: {
1984 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1985 struct kvm_irqchip
*chip
= kmalloc(sizeof(*chip
), GFP_KERNEL
);
1991 if (copy_from_user(chip
, argp
, sizeof *chip
))
1992 goto get_irqchip_out
;
1994 if (!irqchip_in_kernel(kvm
))
1995 goto get_irqchip_out
;
1996 r
= kvm_vm_ioctl_get_irqchip(kvm
, chip
);
1998 goto get_irqchip_out
;
2000 if (copy_to_user(argp
, chip
, sizeof *chip
))
2001 goto get_irqchip_out
;
2009 case KVM_SET_IRQCHIP
: {
2010 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
2011 struct kvm_irqchip
*chip
= kmalloc(sizeof(*chip
), GFP_KERNEL
);
2017 if (copy_from_user(chip
, argp
, sizeof *chip
))
2018 goto set_irqchip_out
;
2020 if (!irqchip_in_kernel(kvm
))
2021 goto set_irqchip_out
;
2022 r
= kvm_vm_ioctl_set_irqchip(kvm
, chip
);
2024 goto set_irqchip_out
;
2032 case KVM_ASSIGN_PCI_DEVICE
: {
2033 struct kvm_assigned_pci_dev assigned_dev
;
2036 if (copy_from_user(&assigned_dev
, argp
, sizeof assigned_dev
))
2038 r
= kvm_vm_ioctl_assign_device(kvm
, &assigned_dev
);
2043 case KVM_ASSIGN_IRQ
: {
2044 struct kvm_assigned_irq assigned_irq
;
2047 if (copy_from_user(&assigned_irq
, argp
, sizeof assigned_irq
))
2049 r
= kvm_vm_ioctl_assign_irq(kvm
, &assigned_irq
);
2056 if (copy_from_user(&u
.ps
, argp
, sizeof(struct kvm_pit_state
)))
2059 if (!kvm
->arch
.vpit
)
2061 r
= kvm_vm_ioctl_get_pit(kvm
, &u
.ps
);
2065 if (copy_to_user(argp
, &u
.ps
, sizeof(struct kvm_pit_state
)))
2072 if (copy_from_user(&u
.ps
, argp
, sizeof u
.ps
))
2075 if (!kvm
->arch
.vpit
)
2077 r
= kvm_vm_ioctl_set_pit(kvm
, &u
.ps
);
2090 static void kvm_init_msr_list(void)
2095 for (i
= j
= 0; i
< ARRAY_SIZE(msrs_to_save
); i
++) {
2096 if (rdmsr_safe(msrs_to_save
[i
], &dummy
[0], &dummy
[1]) < 0)
2099 msrs_to_save
[j
] = msrs_to_save
[i
];
2102 num_msrs_to_save
= j
;
2106 * Only apic need an MMIO device hook, so shortcut now..
2108 static struct kvm_io_device
*vcpu_find_pervcpu_dev(struct kvm_vcpu
*vcpu
,
2109 gpa_t addr
, int len
,
2112 struct kvm_io_device
*dev
;
2114 if (vcpu
->arch
.apic
) {
2115 dev
= &vcpu
->arch
.apic
->dev
;
2116 if (dev
->in_range(dev
, addr
, len
, is_write
))
2123 static struct kvm_io_device
*vcpu_find_mmio_dev(struct kvm_vcpu
*vcpu
,
2124 gpa_t addr
, int len
,
2127 struct kvm_io_device
*dev
;
2129 dev
= vcpu_find_pervcpu_dev(vcpu
, addr
, len
, is_write
);
2131 dev
= kvm_io_bus_find_dev(&vcpu
->kvm
->mmio_bus
, addr
, len
,
2136 int emulator_read_std(unsigned long addr
,
2139 struct kvm_vcpu
*vcpu
)
2142 int r
= X86EMUL_CONTINUE
;
2145 gpa_t gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
2146 unsigned offset
= addr
& (PAGE_SIZE
-1);
2147 unsigned tocopy
= min(bytes
, (unsigned)PAGE_SIZE
- offset
);
2150 if (gpa
== UNMAPPED_GVA
) {
2151 r
= X86EMUL_PROPAGATE_FAULT
;
2154 ret
= kvm_read_guest(vcpu
->kvm
, gpa
, data
, tocopy
);
2156 r
= X86EMUL_UNHANDLEABLE
;
2167 EXPORT_SYMBOL_GPL(emulator_read_std
);
2169 static int emulator_read_emulated(unsigned long addr
,
2172 struct kvm_vcpu
*vcpu
)
2174 struct kvm_io_device
*mmio_dev
;
2177 if (vcpu
->mmio_read_completed
) {
2178 memcpy(val
, vcpu
->mmio_data
, bytes
);
2179 vcpu
->mmio_read_completed
= 0;
2180 return X86EMUL_CONTINUE
;
2183 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
2185 /* For APIC access vmexit */
2186 if ((gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
2189 if (emulator_read_std(addr
, val
, bytes
, vcpu
)
2190 == X86EMUL_CONTINUE
)
2191 return X86EMUL_CONTINUE
;
2192 if (gpa
== UNMAPPED_GVA
)
2193 return X86EMUL_PROPAGATE_FAULT
;
2197 * Is this MMIO handled locally?
2199 mutex_lock(&vcpu
->kvm
->lock
);
2200 mmio_dev
= vcpu_find_mmio_dev(vcpu
, gpa
, bytes
, 0);
2202 kvm_iodevice_read(mmio_dev
, gpa
, bytes
, val
);
2203 mutex_unlock(&vcpu
->kvm
->lock
);
2204 return X86EMUL_CONTINUE
;
2206 mutex_unlock(&vcpu
->kvm
->lock
);
2208 vcpu
->mmio_needed
= 1;
2209 vcpu
->mmio_phys_addr
= gpa
;
2210 vcpu
->mmio_size
= bytes
;
2211 vcpu
->mmio_is_write
= 0;
2213 return X86EMUL_UNHANDLEABLE
;
2216 int emulator_write_phys(struct kvm_vcpu
*vcpu
, gpa_t gpa
,
2217 const void *val
, int bytes
)
2221 ret
= kvm_write_guest(vcpu
->kvm
, gpa
, val
, bytes
);
2224 kvm_mmu_pte_write(vcpu
, gpa
, val
, bytes
);
2228 static int emulator_write_emulated_onepage(unsigned long addr
,
2231 struct kvm_vcpu
*vcpu
)
2233 struct kvm_io_device
*mmio_dev
;
2236 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
2238 if (gpa
== UNMAPPED_GVA
) {
2239 kvm_inject_page_fault(vcpu
, addr
, 2);
2240 return X86EMUL_PROPAGATE_FAULT
;
2243 /* For APIC access vmexit */
2244 if ((gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
2247 if (emulator_write_phys(vcpu
, gpa
, val
, bytes
))
2248 return X86EMUL_CONTINUE
;
2252 * Is this MMIO handled locally?
2254 mutex_lock(&vcpu
->kvm
->lock
);
2255 mmio_dev
= vcpu_find_mmio_dev(vcpu
, gpa
, bytes
, 1);
2257 kvm_iodevice_write(mmio_dev
, gpa
, bytes
, val
);
2258 mutex_unlock(&vcpu
->kvm
->lock
);
2259 return X86EMUL_CONTINUE
;
2261 mutex_unlock(&vcpu
->kvm
->lock
);
2263 vcpu
->mmio_needed
= 1;
2264 vcpu
->mmio_phys_addr
= gpa
;
2265 vcpu
->mmio_size
= bytes
;
2266 vcpu
->mmio_is_write
= 1;
2267 memcpy(vcpu
->mmio_data
, val
, bytes
);
2269 return X86EMUL_CONTINUE
;
2272 int emulator_write_emulated(unsigned long addr
,
2275 struct kvm_vcpu
*vcpu
)
2277 /* Crossing a page boundary? */
2278 if (((addr
+ bytes
- 1) ^ addr
) & PAGE_MASK
) {
2281 now
= -addr
& ~PAGE_MASK
;
2282 rc
= emulator_write_emulated_onepage(addr
, val
, now
, vcpu
);
2283 if (rc
!= X86EMUL_CONTINUE
)
2289 return emulator_write_emulated_onepage(addr
, val
, bytes
, vcpu
);
2291 EXPORT_SYMBOL_GPL(emulator_write_emulated
);
2293 static int emulator_cmpxchg_emulated(unsigned long addr
,
2297 struct kvm_vcpu
*vcpu
)
2299 static int reported
;
2303 printk(KERN_WARNING
"kvm: emulating exchange as write\n");
2305 #ifndef CONFIG_X86_64
2306 /* guests cmpxchg8b have to be emulated atomically */
2313 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
2315 if (gpa
== UNMAPPED_GVA
||
2316 (gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
2319 if (((gpa
+ bytes
- 1) & PAGE_MASK
) != (gpa
& PAGE_MASK
))
2324 page
= gfn_to_page(vcpu
->kvm
, gpa
>> PAGE_SHIFT
);
2326 kaddr
= kmap_atomic(page
, KM_USER0
);
2327 set_64bit((u64
*)(kaddr
+ offset_in_page(gpa
)), val
);
2328 kunmap_atomic(kaddr
, KM_USER0
);
2329 kvm_release_page_dirty(page
);
2334 return emulator_write_emulated(addr
, new, bytes
, vcpu
);
2337 static unsigned long get_segment_base(struct kvm_vcpu
*vcpu
, int seg
)
2339 return kvm_x86_ops
->get_segment_base(vcpu
, seg
);
2342 int emulate_invlpg(struct kvm_vcpu
*vcpu
, gva_t address
)
2344 kvm_mmu_invlpg(vcpu
, address
);
2345 return X86EMUL_CONTINUE
;
2348 int emulate_clts(struct kvm_vcpu
*vcpu
)
2350 KVMTRACE_0D(CLTS
, vcpu
, handler
);
2351 kvm_x86_ops
->set_cr0(vcpu
, vcpu
->arch
.cr0
& ~X86_CR0_TS
);
2352 return X86EMUL_CONTINUE
;
2355 int emulator_get_dr(struct x86_emulate_ctxt
*ctxt
, int dr
, unsigned long *dest
)
2357 struct kvm_vcpu
*vcpu
= ctxt
->vcpu
;
2361 *dest
= kvm_x86_ops
->get_dr(vcpu
, dr
);
2362 return X86EMUL_CONTINUE
;
2364 pr_unimpl(vcpu
, "%s: unexpected dr %u\n", __func__
, dr
);
2365 return X86EMUL_UNHANDLEABLE
;
2369 int emulator_set_dr(struct x86_emulate_ctxt
*ctxt
, int dr
, unsigned long value
)
2371 unsigned long mask
= (ctxt
->mode
== X86EMUL_MODE_PROT64
) ? ~0ULL : ~0U;
2374 kvm_x86_ops
->set_dr(ctxt
->vcpu
, dr
, value
& mask
, &exception
);
2376 /* FIXME: better handling */
2377 return X86EMUL_UNHANDLEABLE
;
2379 return X86EMUL_CONTINUE
;
2382 void kvm_report_emulation_failure(struct kvm_vcpu
*vcpu
, const char *context
)
2385 unsigned long rip
= kvm_rip_read(vcpu
);
2386 unsigned long rip_linear
;
2388 if (!printk_ratelimit())
2391 rip_linear
= rip
+ get_segment_base(vcpu
, VCPU_SREG_CS
);
2393 emulator_read_std(rip_linear
, (void *)opcodes
, 4, vcpu
);
2395 printk(KERN_ERR
"emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
2396 context
, rip
, opcodes
[0], opcodes
[1], opcodes
[2], opcodes
[3]);
2398 EXPORT_SYMBOL_GPL(kvm_report_emulation_failure
);
2400 static struct x86_emulate_ops emulate_ops
= {
2401 .read_std
= emulator_read_std
,
2402 .read_emulated
= emulator_read_emulated
,
2403 .write_emulated
= emulator_write_emulated
,
2404 .cmpxchg_emulated
= emulator_cmpxchg_emulated
,
2407 static void cache_all_regs(struct kvm_vcpu
*vcpu
)
2409 kvm_register_read(vcpu
, VCPU_REGS_RAX
);
2410 kvm_register_read(vcpu
, VCPU_REGS_RSP
);
2411 kvm_register_read(vcpu
, VCPU_REGS_RIP
);
2412 vcpu
->arch
.regs_dirty
= ~0;
2415 int emulate_instruction(struct kvm_vcpu
*vcpu
,
2416 struct kvm_run
*run
,
2422 struct decode_cache
*c
;
2424 kvm_clear_exception_queue(vcpu
);
2425 vcpu
->arch
.mmio_fault_cr2
= cr2
;
2427 * TODO: fix x86_emulate.c to use guest_read/write_register
2428 * instead of direct ->regs accesses, can save hundred cycles
2429 * on Intel for instructions that don't read/change RSP, for
2432 cache_all_regs(vcpu
);
2434 vcpu
->mmio_is_write
= 0;
2435 vcpu
->arch
.pio
.string
= 0;
2437 if (!(emulation_type
& EMULTYPE_NO_DECODE
)) {
2439 kvm_x86_ops
->get_cs_db_l_bits(vcpu
, &cs_db
, &cs_l
);
2441 vcpu
->arch
.emulate_ctxt
.vcpu
= vcpu
;
2442 vcpu
->arch
.emulate_ctxt
.eflags
= kvm_x86_ops
->get_rflags(vcpu
);
2443 vcpu
->arch
.emulate_ctxt
.mode
=
2444 (vcpu
->arch
.emulate_ctxt
.eflags
& X86_EFLAGS_VM
)
2445 ? X86EMUL_MODE_REAL
: cs_l
2446 ? X86EMUL_MODE_PROT64
: cs_db
2447 ? X86EMUL_MODE_PROT32
: X86EMUL_MODE_PROT16
;
2449 r
= x86_decode_insn(&vcpu
->arch
.emulate_ctxt
, &emulate_ops
);
2451 /* Reject the instructions other than VMCALL/VMMCALL when
2452 * try to emulate invalid opcode */
2453 c
= &vcpu
->arch
.emulate_ctxt
.decode
;
2454 if ((emulation_type
& EMULTYPE_TRAP_UD
) &&
2455 (!(c
->twobyte
&& c
->b
== 0x01 &&
2456 (c
->modrm_reg
== 0 || c
->modrm_reg
== 3) &&
2457 c
->modrm_mod
== 3 && c
->modrm_rm
== 1)))
2458 return EMULATE_FAIL
;
2460 ++vcpu
->stat
.insn_emulation
;
2462 ++vcpu
->stat
.insn_emulation_fail
;
2463 if (kvm_mmu_unprotect_page_virt(vcpu
, cr2
))
2464 return EMULATE_DONE
;
2465 return EMULATE_FAIL
;
2469 r
= x86_emulate_insn(&vcpu
->arch
.emulate_ctxt
, &emulate_ops
);
2471 if (vcpu
->arch
.pio
.string
)
2472 return EMULATE_DO_MMIO
;
2474 if ((r
|| vcpu
->mmio_is_write
) && run
) {
2475 run
->exit_reason
= KVM_EXIT_MMIO
;
2476 run
->mmio
.phys_addr
= vcpu
->mmio_phys_addr
;
2477 memcpy(run
->mmio
.data
, vcpu
->mmio_data
, 8);
2478 run
->mmio
.len
= vcpu
->mmio_size
;
2479 run
->mmio
.is_write
= vcpu
->mmio_is_write
;
2483 if (kvm_mmu_unprotect_page_virt(vcpu
, cr2
))
2484 return EMULATE_DONE
;
2485 if (!vcpu
->mmio_needed
) {
2486 kvm_report_emulation_failure(vcpu
, "mmio");
2487 return EMULATE_FAIL
;
2489 return EMULATE_DO_MMIO
;
2492 kvm_x86_ops
->set_rflags(vcpu
, vcpu
->arch
.emulate_ctxt
.eflags
);
2494 if (vcpu
->mmio_is_write
) {
2495 vcpu
->mmio_needed
= 0;
2496 return EMULATE_DO_MMIO
;
2499 return EMULATE_DONE
;
2501 EXPORT_SYMBOL_GPL(emulate_instruction
);
2503 static void free_pio_guest_pages(struct kvm_vcpu
*vcpu
)
2507 for (i
= 0; i
< ARRAY_SIZE(vcpu
->arch
.pio
.guest_pages
); ++i
)
2508 if (vcpu
->arch
.pio
.guest_pages
[i
]) {
2509 kvm_release_page_dirty(vcpu
->arch
.pio
.guest_pages
[i
]);
2510 vcpu
->arch
.pio
.guest_pages
[i
] = NULL
;
2514 static int pio_copy_data(struct kvm_vcpu
*vcpu
)
2516 void *p
= vcpu
->arch
.pio_data
;
2519 int nr_pages
= vcpu
->arch
.pio
.guest_pages
[1] ? 2 : 1;
2521 q
= vmap(vcpu
->arch
.pio
.guest_pages
, nr_pages
, VM_READ
|VM_WRITE
,
2524 free_pio_guest_pages(vcpu
);
2527 q
+= vcpu
->arch
.pio
.guest_page_offset
;
2528 bytes
= vcpu
->arch
.pio
.size
* vcpu
->arch
.pio
.cur_count
;
2529 if (vcpu
->arch
.pio
.in
)
2530 memcpy(q
, p
, bytes
);
2532 memcpy(p
, q
, bytes
);
2533 q
-= vcpu
->arch
.pio
.guest_page_offset
;
2535 free_pio_guest_pages(vcpu
);
2539 int complete_pio(struct kvm_vcpu
*vcpu
)
2541 struct kvm_pio_request
*io
= &vcpu
->arch
.pio
;
2548 val
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
2549 memcpy(&val
, vcpu
->arch
.pio_data
, io
->size
);
2550 kvm_register_write(vcpu
, VCPU_REGS_RAX
, val
);
2554 r
= pio_copy_data(vcpu
);
2561 delta
*= io
->cur_count
;
2563 * The size of the register should really depend on
2564 * current address size.
2566 val
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
2568 kvm_register_write(vcpu
, VCPU_REGS_RCX
, val
);
2574 val
= kvm_register_read(vcpu
, VCPU_REGS_RDI
);
2576 kvm_register_write(vcpu
, VCPU_REGS_RDI
, val
);
2578 val
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
2580 kvm_register_write(vcpu
, VCPU_REGS_RSI
, val
);
2584 io
->count
-= io
->cur_count
;
2590 static void kernel_pio(struct kvm_io_device
*pio_dev
,
2591 struct kvm_vcpu
*vcpu
,
2594 /* TODO: String I/O for in kernel device */
2596 mutex_lock(&vcpu
->kvm
->lock
);
2597 if (vcpu
->arch
.pio
.in
)
2598 kvm_iodevice_read(pio_dev
, vcpu
->arch
.pio
.port
,
2599 vcpu
->arch
.pio
.size
,
2602 kvm_iodevice_write(pio_dev
, vcpu
->arch
.pio
.port
,
2603 vcpu
->arch
.pio
.size
,
2605 mutex_unlock(&vcpu
->kvm
->lock
);
2608 static void pio_string_write(struct kvm_io_device
*pio_dev
,
2609 struct kvm_vcpu
*vcpu
)
2611 struct kvm_pio_request
*io
= &vcpu
->arch
.pio
;
2612 void *pd
= vcpu
->arch
.pio_data
;
2615 mutex_lock(&vcpu
->kvm
->lock
);
2616 for (i
= 0; i
< io
->cur_count
; i
++) {
2617 kvm_iodevice_write(pio_dev
, io
->port
,
2622 mutex_unlock(&vcpu
->kvm
->lock
);
2625 static struct kvm_io_device
*vcpu_find_pio_dev(struct kvm_vcpu
*vcpu
,
2626 gpa_t addr
, int len
,
2629 return kvm_io_bus_find_dev(&vcpu
->kvm
->pio_bus
, addr
, len
, is_write
);
2632 int kvm_emulate_pio(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
, int in
,
2633 int size
, unsigned port
)
2635 struct kvm_io_device
*pio_dev
;
2638 vcpu
->run
->exit_reason
= KVM_EXIT_IO
;
2639 vcpu
->run
->io
.direction
= in
? KVM_EXIT_IO_IN
: KVM_EXIT_IO_OUT
;
2640 vcpu
->run
->io
.size
= vcpu
->arch
.pio
.size
= size
;
2641 vcpu
->run
->io
.data_offset
= KVM_PIO_PAGE_OFFSET
* PAGE_SIZE
;
2642 vcpu
->run
->io
.count
= vcpu
->arch
.pio
.count
= vcpu
->arch
.pio
.cur_count
= 1;
2643 vcpu
->run
->io
.port
= vcpu
->arch
.pio
.port
= port
;
2644 vcpu
->arch
.pio
.in
= in
;
2645 vcpu
->arch
.pio
.string
= 0;
2646 vcpu
->arch
.pio
.down
= 0;
2647 vcpu
->arch
.pio
.guest_page_offset
= 0;
2648 vcpu
->arch
.pio
.rep
= 0;
2650 if (vcpu
->run
->io
.direction
== KVM_EXIT_IO_IN
)
2651 KVMTRACE_2D(IO_READ
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2654 KVMTRACE_2D(IO_WRITE
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2657 val
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
2658 memcpy(vcpu
->arch
.pio_data
, &val
, 4);
2660 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
2662 pio_dev
= vcpu_find_pio_dev(vcpu
, port
, size
, !in
);
2664 kernel_pio(pio_dev
, vcpu
, vcpu
->arch
.pio_data
);
2670 EXPORT_SYMBOL_GPL(kvm_emulate_pio
);
2672 int kvm_emulate_pio_string(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
, int in
,
2673 int size
, unsigned long count
, int down
,
2674 gva_t address
, int rep
, unsigned port
)
2676 unsigned now
, in_page
;
2680 struct kvm_io_device
*pio_dev
;
2682 vcpu
->run
->exit_reason
= KVM_EXIT_IO
;
2683 vcpu
->run
->io
.direction
= in
? KVM_EXIT_IO_IN
: KVM_EXIT_IO_OUT
;
2684 vcpu
->run
->io
.size
= vcpu
->arch
.pio
.size
= size
;
2685 vcpu
->run
->io
.data_offset
= KVM_PIO_PAGE_OFFSET
* PAGE_SIZE
;
2686 vcpu
->run
->io
.count
= vcpu
->arch
.pio
.count
= vcpu
->arch
.pio
.cur_count
= count
;
2687 vcpu
->run
->io
.port
= vcpu
->arch
.pio
.port
= port
;
2688 vcpu
->arch
.pio
.in
= in
;
2689 vcpu
->arch
.pio
.string
= 1;
2690 vcpu
->arch
.pio
.down
= down
;
2691 vcpu
->arch
.pio
.guest_page_offset
= offset_in_page(address
);
2692 vcpu
->arch
.pio
.rep
= rep
;
2694 if (vcpu
->run
->io
.direction
== KVM_EXIT_IO_IN
)
2695 KVMTRACE_2D(IO_READ
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2698 KVMTRACE_2D(IO_WRITE
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2702 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
2707 in_page
= PAGE_SIZE
- offset_in_page(address
);
2709 in_page
= offset_in_page(address
) + size
;
2710 now
= min(count
, (unsigned long)in_page
/ size
);
2713 * String I/O straddles page boundary. Pin two guest pages
2714 * so that we satisfy atomicity constraints. Do just one
2715 * transaction to avoid complexity.
2722 * String I/O in reverse. Yuck. Kill the guest, fix later.
2724 pr_unimpl(vcpu
, "guest string pio down\n");
2725 kvm_inject_gp(vcpu
, 0);
2728 vcpu
->run
->io
.count
= now
;
2729 vcpu
->arch
.pio
.cur_count
= now
;
2731 if (vcpu
->arch
.pio
.cur_count
== vcpu
->arch
.pio
.count
)
2732 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
2734 for (i
= 0; i
< nr_pages
; ++i
) {
2735 page
= gva_to_page(vcpu
, address
+ i
* PAGE_SIZE
);
2736 vcpu
->arch
.pio
.guest_pages
[i
] = page
;
2738 kvm_inject_gp(vcpu
, 0);
2739 free_pio_guest_pages(vcpu
);
2744 pio_dev
= vcpu_find_pio_dev(vcpu
, port
,
2745 vcpu
->arch
.pio
.cur_count
,
2746 !vcpu
->arch
.pio
.in
);
2747 if (!vcpu
->arch
.pio
.in
) {
2748 /* string PIO write */
2749 ret
= pio_copy_data(vcpu
);
2750 if (ret
>= 0 && pio_dev
) {
2751 pio_string_write(pio_dev
, vcpu
);
2753 if (vcpu
->arch
.pio
.count
== 0)
2757 pr_unimpl(vcpu
, "no string pio read support yet, "
2758 "port %x size %d count %ld\n",
2763 EXPORT_SYMBOL_GPL(kvm_emulate_pio_string
);
2765 int kvm_arch_init(void *opaque
)
2768 struct kvm_x86_ops
*ops
= (struct kvm_x86_ops
*)opaque
;
2771 printk(KERN_ERR
"kvm: already loaded the other module\n");
2776 if (!ops
->cpu_has_kvm_support()) {
2777 printk(KERN_ERR
"kvm: no hardware support\n");
2781 if (ops
->disabled_by_bios()) {
2782 printk(KERN_ERR
"kvm: disabled by bios\n");
2787 r
= kvm_mmu_module_init();
2791 kvm_init_msr_list();
2794 kvm_mmu_set_nonpresent_ptes(0ull, 0ull);
2795 kvm_mmu_set_base_ptes(PT_PRESENT_MASK
);
2796 kvm_mmu_set_mask_ptes(PT_USER_MASK
, PT_ACCESSED_MASK
,
2797 PT_DIRTY_MASK
, PT64_NX_MASK
, 0);
2804 void kvm_arch_exit(void)
2807 kvm_mmu_module_exit();
2810 int kvm_emulate_halt(struct kvm_vcpu
*vcpu
)
2812 ++vcpu
->stat
.halt_exits
;
2813 KVMTRACE_0D(HLT
, vcpu
, handler
);
2814 if (irqchip_in_kernel(vcpu
->kvm
)) {
2815 vcpu
->arch
.mp_state
= KVM_MP_STATE_HALTED
;
2818 vcpu
->run
->exit_reason
= KVM_EXIT_HLT
;
2822 EXPORT_SYMBOL_GPL(kvm_emulate_halt
);
2824 static inline gpa_t
hc_gpa(struct kvm_vcpu
*vcpu
, unsigned long a0
,
2827 if (is_long_mode(vcpu
))
2830 return a0
| ((gpa_t
)a1
<< 32);
2833 int kvm_emulate_hypercall(struct kvm_vcpu
*vcpu
)
2835 unsigned long nr
, a0
, a1
, a2
, a3
, ret
;
2838 nr
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
2839 a0
= kvm_register_read(vcpu
, VCPU_REGS_RBX
);
2840 a1
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
2841 a2
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
2842 a3
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
2844 KVMTRACE_1D(VMMCALL
, vcpu
, (u32
)nr
, handler
);
2846 if (!is_long_mode(vcpu
)) {
2855 case KVM_HC_VAPIC_POLL_IRQ
:
2859 r
= kvm_pv_mmu_op(vcpu
, a0
, hc_gpa(vcpu
, a1
, a2
), &ret
);
2865 kvm_register_write(vcpu
, VCPU_REGS_RAX
, ret
);
2866 ++vcpu
->stat
.hypercalls
;
2869 EXPORT_SYMBOL_GPL(kvm_emulate_hypercall
);
2871 int kvm_fix_hypercall(struct kvm_vcpu
*vcpu
)
2873 char instruction
[3];
2875 unsigned long rip
= kvm_rip_read(vcpu
);
2879 * Blow out the MMU to ensure that no other VCPU has an active mapping
2880 * to ensure that the updated hypercall appears atomically across all
2883 kvm_mmu_zap_all(vcpu
->kvm
);
2885 kvm_x86_ops
->patch_hypercall(vcpu
, instruction
);
2886 if (emulator_write_emulated(rip
, instruction
, 3, vcpu
)
2887 != X86EMUL_CONTINUE
)
2893 static u64
mk_cr_64(u64 curr_cr
, u32 new_val
)
2895 return (curr_cr
& ~((1ULL << 32) - 1)) | new_val
;
2898 void realmode_lgdt(struct kvm_vcpu
*vcpu
, u16 limit
, unsigned long base
)
2900 struct descriptor_table dt
= { limit
, base
};
2902 kvm_x86_ops
->set_gdt(vcpu
, &dt
);
2905 void realmode_lidt(struct kvm_vcpu
*vcpu
, u16 limit
, unsigned long base
)
2907 struct descriptor_table dt
= { limit
, base
};
2909 kvm_x86_ops
->set_idt(vcpu
, &dt
);
2912 void realmode_lmsw(struct kvm_vcpu
*vcpu
, unsigned long msw
,
2913 unsigned long *rflags
)
2915 kvm_lmsw(vcpu
, msw
);
2916 *rflags
= kvm_x86_ops
->get_rflags(vcpu
);
2919 unsigned long realmode_get_cr(struct kvm_vcpu
*vcpu
, int cr
)
2921 unsigned long value
;
2923 kvm_x86_ops
->decache_cr4_guest_bits(vcpu
);
2926 value
= vcpu
->arch
.cr0
;
2929 value
= vcpu
->arch
.cr2
;
2932 value
= vcpu
->arch
.cr3
;
2935 value
= vcpu
->arch
.cr4
;
2938 value
= kvm_get_cr8(vcpu
);
2941 vcpu_printf(vcpu
, "%s: unexpected cr %u\n", __func__
, cr
);
2944 KVMTRACE_3D(CR_READ
, vcpu
, (u32
)cr
, (u32
)value
,
2945 (u32
)((u64
)value
>> 32), handler
);
2950 void realmode_set_cr(struct kvm_vcpu
*vcpu
, int cr
, unsigned long val
,
2951 unsigned long *rflags
)
2953 KVMTRACE_3D(CR_WRITE
, vcpu
, (u32
)cr
, (u32
)val
,
2954 (u32
)((u64
)val
>> 32), handler
);
2958 kvm_set_cr0(vcpu
, mk_cr_64(vcpu
->arch
.cr0
, val
));
2959 *rflags
= kvm_x86_ops
->get_rflags(vcpu
);
2962 vcpu
->arch
.cr2
= val
;
2965 kvm_set_cr3(vcpu
, val
);
2968 kvm_set_cr4(vcpu
, mk_cr_64(vcpu
->arch
.cr4
, val
));
2971 kvm_set_cr8(vcpu
, val
& 0xfUL
);
2974 vcpu_printf(vcpu
, "%s: unexpected cr %u\n", __func__
, cr
);
2978 static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu
*vcpu
, int i
)
2980 struct kvm_cpuid_entry2
*e
= &vcpu
->arch
.cpuid_entries
[i
];
2981 int j
, nent
= vcpu
->arch
.cpuid_nent
;
2983 e
->flags
&= ~KVM_CPUID_FLAG_STATE_READ_NEXT
;
2984 /* when no next entry is found, the current entry[i] is reselected */
2985 for (j
= i
+ 1; j
== i
; j
= (j
+ 1) % nent
) {
2986 struct kvm_cpuid_entry2
*ej
= &vcpu
->arch
.cpuid_entries
[j
];
2987 if (ej
->function
== e
->function
) {
2988 ej
->flags
|= KVM_CPUID_FLAG_STATE_READ_NEXT
;
2992 return 0; /* silence gcc, even though control never reaches here */
2995 /* find an entry with matching function, matching index (if needed), and that
2996 * should be read next (if it's stateful) */
2997 static int is_matching_cpuid_entry(struct kvm_cpuid_entry2
*e
,
2998 u32 function
, u32 index
)
3000 if (e
->function
!= function
)
3002 if ((e
->flags
& KVM_CPUID_FLAG_SIGNIFCANT_INDEX
) && e
->index
!= index
)
3004 if ((e
->flags
& KVM_CPUID_FLAG_STATEFUL_FUNC
) &&
3005 !(e
->flags
& KVM_CPUID_FLAG_STATE_READ_NEXT
))
3010 void kvm_emulate_cpuid(struct kvm_vcpu
*vcpu
)
3013 u32 function
, index
;
3014 struct kvm_cpuid_entry2
*e
, *best
;
3016 function
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
3017 index
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
3018 kvm_register_write(vcpu
, VCPU_REGS_RAX
, 0);
3019 kvm_register_write(vcpu
, VCPU_REGS_RBX
, 0);
3020 kvm_register_write(vcpu
, VCPU_REGS_RCX
, 0);
3021 kvm_register_write(vcpu
, VCPU_REGS_RDX
, 0);
3023 for (i
= 0; i
< vcpu
->arch
.cpuid_nent
; ++i
) {
3024 e
= &vcpu
->arch
.cpuid_entries
[i
];
3025 if (is_matching_cpuid_entry(e
, function
, index
)) {
3026 if (e
->flags
& KVM_CPUID_FLAG_STATEFUL_FUNC
)
3027 move_to_next_stateful_cpuid_entry(vcpu
, i
);
3032 * Both basic or both extended?
3034 if (((e
->function
^ function
) & 0x80000000) == 0)
3035 if (!best
|| e
->function
> best
->function
)
3039 kvm_register_write(vcpu
, VCPU_REGS_RAX
, best
->eax
);
3040 kvm_register_write(vcpu
, VCPU_REGS_RBX
, best
->ebx
);
3041 kvm_register_write(vcpu
, VCPU_REGS_RCX
, best
->ecx
);
3042 kvm_register_write(vcpu
, VCPU_REGS_RDX
, best
->edx
);
3044 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
3045 KVMTRACE_5D(CPUID
, vcpu
, function
,
3046 (u32
)kvm_register_read(vcpu
, VCPU_REGS_RAX
),
3047 (u32
)kvm_register_read(vcpu
, VCPU_REGS_RBX
),
3048 (u32
)kvm_register_read(vcpu
, VCPU_REGS_RCX
),
3049 (u32
)kvm_register_read(vcpu
, VCPU_REGS_RDX
), handler
);
3051 EXPORT_SYMBOL_GPL(kvm_emulate_cpuid
);
3054 * Check if userspace requested an interrupt window, and that the
3055 * interrupt window is open.
3057 * No need to exit to userspace if we already have an interrupt queued.
3059 static int dm_request_for_irq_injection(struct kvm_vcpu
*vcpu
,
3060 struct kvm_run
*kvm_run
)
3062 return (!vcpu
->arch
.irq_summary
&&
3063 kvm_run
->request_interrupt_window
&&
3064 vcpu
->arch
.interrupt_window_open
&&
3065 (kvm_x86_ops
->get_rflags(vcpu
) & X86_EFLAGS_IF
));
3068 static void post_kvm_run_save(struct kvm_vcpu
*vcpu
,
3069 struct kvm_run
*kvm_run
)
3071 kvm_run
->if_flag
= (kvm_x86_ops
->get_rflags(vcpu
) & X86_EFLAGS_IF
) != 0;
3072 kvm_run
->cr8
= kvm_get_cr8(vcpu
);
3073 kvm_run
->apic_base
= kvm_get_apic_base(vcpu
);
3074 if (irqchip_in_kernel(vcpu
->kvm
))
3075 kvm_run
->ready_for_interrupt_injection
= 1;
3077 kvm_run
->ready_for_interrupt_injection
=
3078 (vcpu
->arch
.interrupt_window_open
&&
3079 vcpu
->arch
.irq_summary
== 0);
3082 static void vapic_enter(struct kvm_vcpu
*vcpu
)
3084 struct kvm_lapic
*apic
= vcpu
->arch
.apic
;
3087 if (!apic
|| !apic
->vapic_addr
)
3090 page
= gfn_to_page(vcpu
->kvm
, apic
->vapic_addr
>> PAGE_SHIFT
);
3092 vcpu
->arch
.apic
->vapic_page
= page
;
3095 static void vapic_exit(struct kvm_vcpu
*vcpu
)
3097 struct kvm_lapic
*apic
= vcpu
->arch
.apic
;
3099 if (!apic
|| !apic
->vapic_addr
)
3102 down_read(&vcpu
->kvm
->slots_lock
);
3103 kvm_release_page_dirty(apic
->vapic_page
);
3104 mark_page_dirty(vcpu
->kvm
, apic
->vapic_addr
>> PAGE_SHIFT
);
3105 up_read(&vcpu
->kvm
->slots_lock
);
3108 static int vcpu_enter_guest(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
3113 if (test_and_clear_bit(KVM_REQ_MMU_RELOAD
, &vcpu
->requests
))
3114 kvm_mmu_unload(vcpu
);
3116 r
= kvm_mmu_reload(vcpu
);
3120 if (vcpu
->requests
) {
3121 if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER
, &vcpu
->requests
))
3122 __kvm_migrate_timers(vcpu
);
3123 if (test_and_clear_bit(KVM_REQ_TLB_FLUSH
, &vcpu
->requests
))
3124 kvm_x86_ops
->tlb_flush(vcpu
);
3125 if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS
,
3127 kvm_run
->exit_reason
= KVM_EXIT_TPR_ACCESS
;
3131 if (test_and_clear_bit(KVM_REQ_TRIPLE_FAULT
, &vcpu
->requests
)) {
3132 kvm_run
->exit_reason
= KVM_EXIT_SHUTDOWN
;
3138 clear_bit(KVM_REQ_PENDING_TIMER
, &vcpu
->requests
);
3139 kvm_inject_pending_timer_irqs(vcpu
);
3143 kvm_x86_ops
->prepare_guest_switch(vcpu
);
3144 kvm_load_guest_fpu(vcpu
);
3146 local_irq_disable();
3148 if (vcpu
->requests
|| need_resched() || signal_pending(current
)) {
3155 if (vcpu
->guest_debug
.enabled
)
3156 kvm_x86_ops
->guest_debug_pre(vcpu
);
3158 vcpu
->guest_mode
= 1;
3160 * Make sure that guest_mode assignment won't happen after
3161 * testing the pending IRQ vector bitmap.
3165 if (vcpu
->arch
.exception
.pending
)
3166 __queue_exception(vcpu
);
3167 else if (irqchip_in_kernel(vcpu
->kvm
))
3168 kvm_x86_ops
->inject_pending_irq(vcpu
);
3170 kvm_x86_ops
->inject_pending_vectors(vcpu
, kvm_run
);
3172 kvm_lapic_sync_to_vapic(vcpu
);
3174 up_read(&vcpu
->kvm
->slots_lock
);
3179 KVMTRACE_0D(VMENTRY
, vcpu
, entryexit
);
3180 kvm_x86_ops
->run(vcpu
, kvm_run
);
3182 vcpu
->guest_mode
= 0;
3188 * We must have an instruction between local_irq_enable() and
3189 * kvm_guest_exit(), so the timer interrupt isn't delayed by
3190 * the interrupt shadow. The stat.exits increment will do nicely.
3191 * But we need to prevent reordering, hence this barrier():
3199 down_read(&vcpu
->kvm
->slots_lock
);
3202 * Profile KVM exit RIPs:
3204 if (unlikely(prof_on
== KVM_PROFILING
)) {
3205 unsigned long rip
= kvm_rip_read(vcpu
);
3206 profile_hit(KVM_PROFILING
, (void *)rip
);
3209 if (vcpu
->arch
.exception
.pending
&& kvm_x86_ops
->exception_injected(vcpu
))
3210 vcpu
->arch
.exception
.pending
= false;
3212 kvm_lapic_sync_from_vapic(vcpu
);
3214 r
= kvm_x86_ops
->handle_exit(kvm_run
, vcpu
);
3219 static int __vcpu_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
3223 if (unlikely(vcpu
->arch
.mp_state
== KVM_MP_STATE_SIPI_RECEIVED
)) {
3224 printk("vcpu %d received sipi with vector # %x\n",
3225 vcpu
->vcpu_id
, vcpu
->arch
.sipi_vector
);
3226 kvm_lapic_reset(vcpu
);
3227 r
= kvm_x86_ops
->vcpu_reset(vcpu
);
3230 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
3233 down_read(&vcpu
->kvm
->slots_lock
);
3238 if (vcpu
->arch
.mp_state
== KVM_MP_STATE_RUNNABLE
)
3239 r
= vcpu_enter_guest(vcpu
, kvm_run
);
3241 up_read(&vcpu
->kvm
->slots_lock
);
3242 kvm_vcpu_block(vcpu
);
3243 down_read(&vcpu
->kvm
->slots_lock
);
3244 if (test_and_clear_bit(KVM_REQ_UNHALT
, &vcpu
->requests
))
3245 if (vcpu
->arch
.mp_state
== KVM_MP_STATE_HALTED
)
3246 vcpu
->arch
.mp_state
=
3247 KVM_MP_STATE_RUNNABLE
;
3248 if (vcpu
->arch
.mp_state
!= KVM_MP_STATE_RUNNABLE
)
3253 if (dm_request_for_irq_injection(vcpu
, kvm_run
)) {
3255 kvm_run
->exit_reason
= KVM_EXIT_INTR
;
3256 ++vcpu
->stat
.request_irq_exits
;
3258 if (signal_pending(current
)) {
3260 kvm_run
->exit_reason
= KVM_EXIT_INTR
;
3261 ++vcpu
->stat
.signal_exits
;
3263 if (need_resched()) {
3264 up_read(&vcpu
->kvm
->slots_lock
);
3266 down_read(&vcpu
->kvm
->slots_lock
);
3271 up_read(&vcpu
->kvm
->slots_lock
);
3272 post_kvm_run_save(vcpu
, kvm_run
);
3279 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
3286 if (vcpu
->sigset_active
)
3287 sigprocmask(SIG_SETMASK
, &vcpu
->sigset
, &sigsaved
);
3289 if (unlikely(vcpu
->arch
.mp_state
== KVM_MP_STATE_UNINITIALIZED
)) {
3290 kvm_vcpu_block(vcpu
);
3291 clear_bit(KVM_REQ_UNHALT
, &vcpu
->requests
);
3296 /* re-sync apic's tpr */
3297 if (!irqchip_in_kernel(vcpu
->kvm
))
3298 kvm_set_cr8(vcpu
, kvm_run
->cr8
);
3300 if (vcpu
->arch
.pio
.cur_count
) {
3301 r
= complete_pio(vcpu
);
3305 #if CONFIG_HAS_IOMEM
3306 if (vcpu
->mmio_needed
) {
3307 memcpy(vcpu
->mmio_data
, kvm_run
->mmio
.data
, 8);
3308 vcpu
->mmio_read_completed
= 1;
3309 vcpu
->mmio_needed
= 0;
3311 down_read(&vcpu
->kvm
->slots_lock
);
3312 r
= emulate_instruction(vcpu
, kvm_run
,
3313 vcpu
->arch
.mmio_fault_cr2
, 0,
3314 EMULTYPE_NO_DECODE
);
3315 up_read(&vcpu
->kvm
->slots_lock
);
3316 if (r
== EMULATE_DO_MMIO
) {
3318 * Read-modify-write. Back to userspace.
3325 if (kvm_run
->exit_reason
== KVM_EXIT_HYPERCALL
)
3326 kvm_register_write(vcpu
, VCPU_REGS_RAX
,
3327 kvm_run
->hypercall
.ret
);
3329 r
= __vcpu_run(vcpu
, kvm_run
);
3332 if (vcpu
->sigset_active
)
3333 sigprocmask(SIG_SETMASK
, &sigsaved
, NULL
);
3339 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
)
3343 regs
->rax
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
3344 regs
->rbx
= kvm_register_read(vcpu
, VCPU_REGS_RBX
);
3345 regs
->rcx
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
3346 regs
->rdx
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
3347 regs
->rsi
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
3348 regs
->rdi
= kvm_register_read(vcpu
, VCPU_REGS_RDI
);
3349 regs
->rsp
= kvm_register_read(vcpu
, VCPU_REGS_RSP
);
3350 regs
->rbp
= kvm_register_read(vcpu
, VCPU_REGS_RBP
);
3351 #ifdef CONFIG_X86_64
3352 regs
->r8
= kvm_register_read(vcpu
, VCPU_REGS_R8
);
3353 regs
->r9
= kvm_register_read(vcpu
, VCPU_REGS_R9
);
3354 regs
->r10
= kvm_register_read(vcpu
, VCPU_REGS_R10
);
3355 regs
->r11
= kvm_register_read(vcpu
, VCPU_REGS_R11
);
3356 regs
->r12
= kvm_register_read(vcpu
, VCPU_REGS_R12
);
3357 regs
->r13
= kvm_register_read(vcpu
, VCPU_REGS_R13
);
3358 regs
->r14
= kvm_register_read(vcpu
, VCPU_REGS_R14
);
3359 regs
->r15
= kvm_register_read(vcpu
, VCPU_REGS_R15
);
3362 regs
->rip
= kvm_rip_read(vcpu
);
3363 regs
->rflags
= kvm_x86_ops
->get_rflags(vcpu
);
3366 * Don't leak debug flags in case they were set for guest debugging
3368 if (vcpu
->guest_debug
.enabled
&& vcpu
->guest_debug
.singlestep
)
3369 regs
->rflags
&= ~(X86_EFLAGS_TF
| X86_EFLAGS_RF
);
3376 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
)
3380 kvm_register_write(vcpu
, VCPU_REGS_RAX
, regs
->rax
);
3381 kvm_register_write(vcpu
, VCPU_REGS_RBX
, regs
->rbx
);
3382 kvm_register_write(vcpu
, VCPU_REGS_RCX
, regs
->rcx
);
3383 kvm_register_write(vcpu
, VCPU_REGS_RDX
, regs
->rdx
);
3384 kvm_register_write(vcpu
, VCPU_REGS_RSI
, regs
->rsi
);
3385 kvm_register_write(vcpu
, VCPU_REGS_RDI
, regs
->rdi
);
3386 kvm_register_write(vcpu
, VCPU_REGS_RSP
, regs
->rsp
);
3387 kvm_register_write(vcpu
, VCPU_REGS_RBP
, regs
->rbp
);
3388 #ifdef CONFIG_X86_64
3389 kvm_register_write(vcpu
, VCPU_REGS_R8
, regs
->r8
);
3390 kvm_register_write(vcpu
, VCPU_REGS_R9
, regs
->r9
);
3391 kvm_register_write(vcpu
, VCPU_REGS_R10
, regs
->r10
);
3392 kvm_register_write(vcpu
, VCPU_REGS_R11
, regs
->r11
);
3393 kvm_register_write(vcpu
, VCPU_REGS_R12
, regs
->r12
);
3394 kvm_register_write(vcpu
, VCPU_REGS_R13
, regs
->r13
);
3395 kvm_register_write(vcpu
, VCPU_REGS_R14
, regs
->r14
);
3396 kvm_register_write(vcpu
, VCPU_REGS_R15
, regs
->r15
);
3400 kvm_rip_write(vcpu
, regs
->rip
);
3401 kvm_x86_ops
->set_rflags(vcpu
, regs
->rflags
);
3404 vcpu
->arch
.exception
.pending
= false;
3411 void kvm_get_segment(struct kvm_vcpu
*vcpu
,
3412 struct kvm_segment
*var
, int seg
)
3414 kvm_x86_ops
->get_segment(vcpu
, var
, seg
);
3417 void kvm_get_cs_db_l_bits(struct kvm_vcpu
*vcpu
, int *db
, int *l
)
3419 struct kvm_segment cs
;
3421 kvm_get_segment(vcpu
, &cs
, VCPU_SREG_CS
);
3425 EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits
);
3427 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
3428 struct kvm_sregs
*sregs
)
3430 struct descriptor_table dt
;
3435 kvm_get_segment(vcpu
, &sregs
->cs
, VCPU_SREG_CS
);
3436 kvm_get_segment(vcpu
, &sregs
->ds
, VCPU_SREG_DS
);
3437 kvm_get_segment(vcpu
, &sregs
->es
, VCPU_SREG_ES
);
3438 kvm_get_segment(vcpu
, &sregs
->fs
, VCPU_SREG_FS
);
3439 kvm_get_segment(vcpu
, &sregs
->gs
, VCPU_SREG_GS
);
3440 kvm_get_segment(vcpu
, &sregs
->ss
, VCPU_SREG_SS
);
3442 kvm_get_segment(vcpu
, &sregs
->tr
, VCPU_SREG_TR
);
3443 kvm_get_segment(vcpu
, &sregs
->ldt
, VCPU_SREG_LDTR
);
3445 kvm_x86_ops
->get_idt(vcpu
, &dt
);
3446 sregs
->idt
.limit
= dt
.limit
;
3447 sregs
->idt
.base
= dt
.base
;
3448 kvm_x86_ops
->get_gdt(vcpu
, &dt
);
3449 sregs
->gdt
.limit
= dt
.limit
;
3450 sregs
->gdt
.base
= dt
.base
;
3452 kvm_x86_ops
->decache_cr4_guest_bits(vcpu
);
3453 sregs
->cr0
= vcpu
->arch
.cr0
;
3454 sregs
->cr2
= vcpu
->arch
.cr2
;
3455 sregs
->cr3
= vcpu
->arch
.cr3
;
3456 sregs
->cr4
= vcpu
->arch
.cr4
;
3457 sregs
->cr8
= kvm_get_cr8(vcpu
);
3458 sregs
->efer
= vcpu
->arch
.shadow_efer
;
3459 sregs
->apic_base
= kvm_get_apic_base(vcpu
);
3461 if (irqchip_in_kernel(vcpu
->kvm
)) {
3462 memset(sregs
->interrupt_bitmap
, 0,
3463 sizeof sregs
->interrupt_bitmap
);
3464 pending_vec
= kvm_x86_ops
->get_irq(vcpu
);
3465 if (pending_vec
>= 0)
3466 set_bit(pending_vec
,
3467 (unsigned long *)sregs
->interrupt_bitmap
);
3469 memcpy(sregs
->interrupt_bitmap
, vcpu
->arch
.irq_pending
,
3470 sizeof sregs
->interrupt_bitmap
);
3477 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
3478 struct kvm_mp_state
*mp_state
)
3481 mp_state
->mp_state
= vcpu
->arch
.mp_state
;
3486 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
3487 struct kvm_mp_state
*mp_state
)
3490 vcpu
->arch
.mp_state
= mp_state
->mp_state
;
3495 static void kvm_set_segment(struct kvm_vcpu
*vcpu
,
3496 struct kvm_segment
*var
, int seg
)
3498 kvm_x86_ops
->set_segment(vcpu
, var
, seg
);
3501 static void seg_desct_to_kvm_desct(struct desc_struct
*seg_desc
, u16 selector
,
3502 struct kvm_segment
*kvm_desct
)
3504 kvm_desct
->base
= seg_desc
->base0
;
3505 kvm_desct
->base
|= seg_desc
->base1
<< 16;
3506 kvm_desct
->base
|= seg_desc
->base2
<< 24;
3507 kvm_desct
->limit
= seg_desc
->limit0
;
3508 kvm_desct
->limit
|= seg_desc
->limit
<< 16;
3510 kvm_desct
->limit
<<= 12;
3511 kvm_desct
->limit
|= 0xfff;
3513 kvm_desct
->selector
= selector
;
3514 kvm_desct
->type
= seg_desc
->type
;
3515 kvm_desct
->present
= seg_desc
->p
;
3516 kvm_desct
->dpl
= seg_desc
->dpl
;
3517 kvm_desct
->db
= seg_desc
->d
;
3518 kvm_desct
->s
= seg_desc
->s
;
3519 kvm_desct
->l
= seg_desc
->l
;
3520 kvm_desct
->g
= seg_desc
->g
;
3521 kvm_desct
->avl
= seg_desc
->avl
;
3523 kvm_desct
->unusable
= 1;
3525 kvm_desct
->unusable
= 0;
3526 kvm_desct
->padding
= 0;
3529 static void get_segment_descritptor_dtable(struct kvm_vcpu
*vcpu
,
3531 struct descriptor_table
*dtable
)
3533 if (selector
& 1 << 2) {
3534 struct kvm_segment kvm_seg
;
3536 kvm_get_segment(vcpu
, &kvm_seg
, VCPU_SREG_LDTR
);
3538 if (kvm_seg
.unusable
)
3541 dtable
->limit
= kvm_seg
.limit
;
3542 dtable
->base
= kvm_seg
.base
;
3545 kvm_x86_ops
->get_gdt(vcpu
, dtable
);
3548 /* allowed just for 8 bytes segments */
3549 static int load_guest_segment_descriptor(struct kvm_vcpu
*vcpu
, u16 selector
,
3550 struct desc_struct
*seg_desc
)
3553 struct descriptor_table dtable
;
3554 u16 index
= selector
>> 3;
3556 get_segment_descritptor_dtable(vcpu
, selector
, &dtable
);
3558 if (dtable
.limit
< index
* 8 + 7) {
3559 kvm_queue_exception_e(vcpu
, GP_VECTOR
, selector
& 0xfffc);
3562 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, dtable
.base
);
3564 return kvm_read_guest(vcpu
->kvm
, gpa
, seg_desc
, 8);
3567 /* allowed just for 8 bytes segments */
3568 static int save_guest_segment_descriptor(struct kvm_vcpu
*vcpu
, u16 selector
,
3569 struct desc_struct
*seg_desc
)
3572 struct descriptor_table dtable
;
3573 u16 index
= selector
>> 3;
3575 get_segment_descritptor_dtable(vcpu
, selector
, &dtable
);
3577 if (dtable
.limit
< index
* 8 + 7)
3579 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, dtable
.base
);
3581 return kvm_write_guest(vcpu
->kvm
, gpa
, seg_desc
, 8);
3584 static u32
get_tss_base_addr(struct kvm_vcpu
*vcpu
,
3585 struct desc_struct
*seg_desc
)
3589 base_addr
= seg_desc
->base0
;
3590 base_addr
|= (seg_desc
->base1
<< 16);
3591 base_addr
|= (seg_desc
->base2
<< 24);
3593 return vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, base_addr
);
3596 static u16
get_segment_selector(struct kvm_vcpu
*vcpu
, int seg
)
3598 struct kvm_segment kvm_seg
;
3600 kvm_get_segment(vcpu
, &kvm_seg
, seg
);
3601 return kvm_seg
.selector
;
3604 static int load_segment_descriptor_to_kvm_desct(struct kvm_vcpu
*vcpu
,
3606 struct kvm_segment
*kvm_seg
)
3608 struct desc_struct seg_desc
;
3610 if (load_guest_segment_descriptor(vcpu
, selector
, &seg_desc
))
3612 seg_desct_to_kvm_desct(&seg_desc
, selector
, kvm_seg
);
3616 static int kvm_load_realmode_segment(struct kvm_vcpu
*vcpu
, u16 selector
, int seg
)
3618 struct kvm_segment segvar
= {
3619 .base
= selector
<< 4,
3621 .selector
= selector
,
3632 kvm_x86_ops
->set_segment(vcpu
, &segvar
, seg
);
3636 int kvm_load_segment_descriptor(struct kvm_vcpu
*vcpu
, u16 selector
,
3637 int type_bits
, int seg
)
3639 struct kvm_segment kvm_seg
;
3641 if (!(vcpu
->arch
.cr0
& X86_CR0_PE
))
3642 return kvm_load_realmode_segment(vcpu
, selector
, seg
);
3643 if (load_segment_descriptor_to_kvm_desct(vcpu
, selector
, &kvm_seg
))
3645 kvm_seg
.type
|= type_bits
;
3647 if (seg
!= VCPU_SREG_SS
&& seg
!= VCPU_SREG_CS
&&
3648 seg
!= VCPU_SREG_LDTR
)
3650 kvm_seg
.unusable
= 1;
3652 kvm_set_segment(vcpu
, &kvm_seg
, seg
);
3656 static void save_state_to_tss32(struct kvm_vcpu
*vcpu
,
3657 struct tss_segment_32
*tss
)
3659 tss
->cr3
= vcpu
->arch
.cr3
;
3660 tss
->eip
= kvm_rip_read(vcpu
);
3661 tss
->eflags
= kvm_x86_ops
->get_rflags(vcpu
);
3662 tss
->eax
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
3663 tss
->ecx
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
3664 tss
->edx
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
3665 tss
->ebx
= kvm_register_read(vcpu
, VCPU_REGS_RBX
);
3666 tss
->esp
= kvm_register_read(vcpu
, VCPU_REGS_RSP
);
3667 tss
->ebp
= kvm_register_read(vcpu
, VCPU_REGS_RBP
);
3668 tss
->esi
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
3669 tss
->edi
= kvm_register_read(vcpu
, VCPU_REGS_RDI
);
3670 tss
->es
= get_segment_selector(vcpu
, VCPU_SREG_ES
);
3671 tss
->cs
= get_segment_selector(vcpu
, VCPU_SREG_CS
);
3672 tss
->ss
= get_segment_selector(vcpu
, VCPU_SREG_SS
);
3673 tss
->ds
= get_segment_selector(vcpu
, VCPU_SREG_DS
);
3674 tss
->fs
= get_segment_selector(vcpu
, VCPU_SREG_FS
);
3675 tss
->gs
= get_segment_selector(vcpu
, VCPU_SREG_GS
);
3676 tss
->ldt_selector
= get_segment_selector(vcpu
, VCPU_SREG_LDTR
);
3677 tss
->prev_task_link
= get_segment_selector(vcpu
, VCPU_SREG_TR
);
3680 static int load_state_from_tss32(struct kvm_vcpu
*vcpu
,
3681 struct tss_segment_32
*tss
)
3683 kvm_set_cr3(vcpu
, tss
->cr3
);
3685 kvm_rip_write(vcpu
, tss
->eip
);
3686 kvm_x86_ops
->set_rflags(vcpu
, tss
->eflags
| 2);
3688 kvm_register_write(vcpu
, VCPU_REGS_RAX
, tss
->eax
);
3689 kvm_register_write(vcpu
, VCPU_REGS_RCX
, tss
->ecx
);
3690 kvm_register_write(vcpu
, VCPU_REGS_RDX
, tss
->edx
);
3691 kvm_register_write(vcpu
, VCPU_REGS_RBX
, tss
->ebx
);
3692 kvm_register_write(vcpu
, VCPU_REGS_RSP
, tss
->esp
);
3693 kvm_register_write(vcpu
, VCPU_REGS_RBP
, tss
->ebp
);
3694 kvm_register_write(vcpu
, VCPU_REGS_RSI
, tss
->esi
);
3695 kvm_register_write(vcpu
, VCPU_REGS_RDI
, tss
->edi
);
3697 if (kvm_load_segment_descriptor(vcpu
, tss
->ldt_selector
, 0, VCPU_SREG_LDTR
))
3700 if (kvm_load_segment_descriptor(vcpu
, tss
->es
, 1, VCPU_SREG_ES
))
3703 if (kvm_load_segment_descriptor(vcpu
, tss
->cs
, 9, VCPU_SREG_CS
))
3706 if (kvm_load_segment_descriptor(vcpu
, tss
->ss
, 1, VCPU_SREG_SS
))
3709 if (kvm_load_segment_descriptor(vcpu
, tss
->ds
, 1, VCPU_SREG_DS
))
3712 if (kvm_load_segment_descriptor(vcpu
, tss
->fs
, 1, VCPU_SREG_FS
))
3715 if (kvm_load_segment_descriptor(vcpu
, tss
->gs
, 1, VCPU_SREG_GS
))
3720 static void save_state_to_tss16(struct kvm_vcpu
*vcpu
,
3721 struct tss_segment_16
*tss
)
3723 tss
->ip
= kvm_rip_read(vcpu
);
3724 tss
->flag
= kvm_x86_ops
->get_rflags(vcpu
);
3725 tss
->ax
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
3726 tss
->cx
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
3727 tss
->dx
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
3728 tss
->bx
= kvm_register_read(vcpu
, VCPU_REGS_RBX
);
3729 tss
->sp
= kvm_register_read(vcpu
, VCPU_REGS_RSP
);
3730 tss
->bp
= kvm_register_read(vcpu
, VCPU_REGS_RBP
);
3731 tss
->si
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
3732 tss
->di
= kvm_register_read(vcpu
, VCPU_REGS_RDI
);
3734 tss
->es
= get_segment_selector(vcpu
, VCPU_SREG_ES
);
3735 tss
->cs
= get_segment_selector(vcpu
, VCPU_SREG_CS
);
3736 tss
->ss
= get_segment_selector(vcpu
, VCPU_SREG_SS
);
3737 tss
->ds
= get_segment_selector(vcpu
, VCPU_SREG_DS
);
3738 tss
->ldt
= get_segment_selector(vcpu
, VCPU_SREG_LDTR
);
3739 tss
->prev_task_link
= get_segment_selector(vcpu
, VCPU_SREG_TR
);
3742 static int load_state_from_tss16(struct kvm_vcpu
*vcpu
,
3743 struct tss_segment_16
*tss
)
3745 kvm_rip_write(vcpu
, tss
->ip
);
3746 kvm_x86_ops
->set_rflags(vcpu
, tss
->flag
| 2);
3747 kvm_register_write(vcpu
, VCPU_REGS_RAX
, tss
->ax
);
3748 kvm_register_write(vcpu
, VCPU_REGS_RCX
, tss
->cx
);
3749 kvm_register_write(vcpu
, VCPU_REGS_RDX
, tss
->dx
);
3750 kvm_register_write(vcpu
, VCPU_REGS_RBX
, tss
->bx
);
3751 kvm_register_write(vcpu
, VCPU_REGS_RSP
, tss
->sp
);
3752 kvm_register_write(vcpu
, VCPU_REGS_RBP
, tss
->bp
);
3753 kvm_register_write(vcpu
, VCPU_REGS_RSI
, tss
->si
);
3754 kvm_register_write(vcpu
, VCPU_REGS_RDI
, tss
->di
);
3756 if (kvm_load_segment_descriptor(vcpu
, tss
->ldt
, 0, VCPU_SREG_LDTR
))
3759 if (kvm_load_segment_descriptor(vcpu
, tss
->es
, 1, VCPU_SREG_ES
))
3762 if (kvm_load_segment_descriptor(vcpu
, tss
->cs
, 9, VCPU_SREG_CS
))
3765 if (kvm_load_segment_descriptor(vcpu
, tss
->ss
, 1, VCPU_SREG_SS
))
3768 if (kvm_load_segment_descriptor(vcpu
, tss
->ds
, 1, VCPU_SREG_DS
))
3773 static int kvm_task_switch_16(struct kvm_vcpu
*vcpu
, u16 tss_selector
,
3775 struct desc_struct
*nseg_desc
)
3777 struct tss_segment_16 tss_segment_16
;
3780 if (kvm_read_guest(vcpu
->kvm
, old_tss_base
, &tss_segment_16
,
3781 sizeof tss_segment_16
))
3784 save_state_to_tss16(vcpu
, &tss_segment_16
);
3786 if (kvm_write_guest(vcpu
->kvm
, old_tss_base
, &tss_segment_16
,
3787 sizeof tss_segment_16
))
3790 if (kvm_read_guest(vcpu
->kvm
, get_tss_base_addr(vcpu
, nseg_desc
),
3791 &tss_segment_16
, sizeof tss_segment_16
))
3794 if (load_state_from_tss16(vcpu
, &tss_segment_16
))
3802 static int kvm_task_switch_32(struct kvm_vcpu
*vcpu
, u16 tss_selector
,
3804 struct desc_struct
*nseg_desc
)
3806 struct tss_segment_32 tss_segment_32
;
3809 if (kvm_read_guest(vcpu
->kvm
, old_tss_base
, &tss_segment_32
,
3810 sizeof tss_segment_32
))
3813 save_state_to_tss32(vcpu
, &tss_segment_32
);
3815 if (kvm_write_guest(vcpu
->kvm
, old_tss_base
, &tss_segment_32
,
3816 sizeof tss_segment_32
))
3819 if (kvm_read_guest(vcpu
->kvm
, get_tss_base_addr(vcpu
, nseg_desc
),
3820 &tss_segment_32
, sizeof tss_segment_32
))
3823 if (load_state_from_tss32(vcpu
, &tss_segment_32
))
3831 int kvm_task_switch(struct kvm_vcpu
*vcpu
, u16 tss_selector
, int reason
)
3833 struct kvm_segment tr_seg
;
3834 struct desc_struct cseg_desc
;
3835 struct desc_struct nseg_desc
;
3837 u32 old_tss_base
= get_segment_base(vcpu
, VCPU_SREG_TR
);
3838 u16 old_tss_sel
= get_segment_selector(vcpu
, VCPU_SREG_TR
);
3840 old_tss_base
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, old_tss_base
);
3842 /* FIXME: Handle errors. Failure to read either TSS or their
3843 * descriptors should generate a pagefault.
3845 if (load_guest_segment_descriptor(vcpu
, tss_selector
, &nseg_desc
))
3848 if (load_guest_segment_descriptor(vcpu
, old_tss_sel
, &cseg_desc
))
3851 if (reason
!= TASK_SWITCH_IRET
) {
3854 cpl
= kvm_x86_ops
->get_cpl(vcpu
);
3855 if ((tss_selector
& 3) > nseg_desc
.dpl
|| cpl
> nseg_desc
.dpl
) {
3856 kvm_queue_exception_e(vcpu
, GP_VECTOR
, 0);
3861 if (!nseg_desc
.p
|| (nseg_desc
.limit0
| nseg_desc
.limit
<< 16) < 0x67) {
3862 kvm_queue_exception_e(vcpu
, TS_VECTOR
, tss_selector
& 0xfffc);
3866 if (reason
== TASK_SWITCH_IRET
|| reason
== TASK_SWITCH_JMP
) {
3867 cseg_desc
.type
&= ~(1 << 1); //clear the B flag
3868 save_guest_segment_descriptor(vcpu
, old_tss_sel
, &cseg_desc
);
3871 if (reason
== TASK_SWITCH_IRET
) {
3872 u32 eflags
= kvm_x86_ops
->get_rflags(vcpu
);
3873 kvm_x86_ops
->set_rflags(vcpu
, eflags
& ~X86_EFLAGS_NT
);
3876 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
3878 if (nseg_desc
.type
& 8)
3879 ret
= kvm_task_switch_32(vcpu
, tss_selector
, old_tss_base
,
3882 ret
= kvm_task_switch_16(vcpu
, tss_selector
, old_tss_base
,
3885 if (reason
== TASK_SWITCH_CALL
|| reason
== TASK_SWITCH_GATE
) {
3886 u32 eflags
= kvm_x86_ops
->get_rflags(vcpu
);
3887 kvm_x86_ops
->set_rflags(vcpu
, eflags
| X86_EFLAGS_NT
);
3890 if (reason
!= TASK_SWITCH_IRET
) {
3891 nseg_desc
.type
|= (1 << 1);
3892 save_guest_segment_descriptor(vcpu
, tss_selector
,
3896 kvm_x86_ops
->set_cr0(vcpu
, vcpu
->arch
.cr0
| X86_CR0_TS
);
3897 seg_desct_to_kvm_desct(&nseg_desc
, tss_selector
, &tr_seg
);
3899 kvm_set_segment(vcpu
, &tr_seg
, VCPU_SREG_TR
);
3903 EXPORT_SYMBOL_GPL(kvm_task_switch
);
3905 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
3906 struct kvm_sregs
*sregs
)
3908 int mmu_reset_needed
= 0;
3909 int i
, pending_vec
, max_bits
;
3910 struct descriptor_table dt
;
3914 dt
.limit
= sregs
->idt
.limit
;
3915 dt
.base
= sregs
->idt
.base
;
3916 kvm_x86_ops
->set_idt(vcpu
, &dt
);
3917 dt
.limit
= sregs
->gdt
.limit
;
3918 dt
.base
= sregs
->gdt
.base
;
3919 kvm_x86_ops
->set_gdt(vcpu
, &dt
);
3921 vcpu
->arch
.cr2
= sregs
->cr2
;
3922 mmu_reset_needed
|= vcpu
->arch
.cr3
!= sregs
->cr3
;
3923 vcpu
->arch
.cr3
= sregs
->cr3
;
3925 kvm_set_cr8(vcpu
, sregs
->cr8
);
3927 mmu_reset_needed
|= vcpu
->arch
.shadow_efer
!= sregs
->efer
;
3928 kvm_x86_ops
->set_efer(vcpu
, sregs
->efer
);
3929 kvm_set_apic_base(vcpu
, sregs
->apic_base
);
3931 kvm_x86_ops
->decache_cr4_guest_bits(vcpu
);
3933 mmu_reset_needed
|= vcpu
->arch
.cr0
!= sregs
->cr0
;
3934 kvm_x86_ops
->set_cr0(vcpu
, sregs
->cr0
);
3935 vcpu
->arch
.cr0
= sregs
->cr0
;
3937 mmu_reset_needed
|= vcpu
->arch
.cr4
!= sregs
->cr4
;
3938 kvm_x86_ops
->set_cr4(vcpu
, sregs
->cr4
);
3939 if (!is_long_mode(vcpu
) && is_pae(vcpu
))
3940 load_pdptrs(vcpu
, vcpu
->arch
.cr3
);
3942 if (mmu_reset_needed
)
3943 kvm_mmu_reset_context(vcpu
);
3945 if (!irqchip_in_kernel(vcpu
->kvm
)) {
3946 memcpy(vcpu
->arch
.irq_pending
, sregs
->interrupt_bitmap
,
3947 sizeof vcpu
->arch
.irq_pending
);
3948 vcpu
->arch
.irq_summary
= 0;
3949 for (i
= 0; i
< ARRAY_SIZE(vcpu
->arch
.irq_pending
); ++i
)
3950 if (vcpu
->arch
.irq_pending
[i
])
3951 __set_bit(i
, &vcpu
->arch
.irq_summary
);
3953 max_bits
= (sizeof sregs
->interrupt_bitmap
) << 3;
3954 pending_vec
= find_first_bit(
3955 (const unsigned long *)sregs
->interrupt_bitmap
,
3957 /* Only pending external irq is handled here */
3958 if (pending_vec
< max_bits
) {
3959 kvm_x86_ops
->set_irq(vcpu
, pending_vec
);
3960 pr_debug("Set back pending irq %d\n",
3965 kvm_set_segment(vcpu
, &sregs
->cs
, VCPU_SREG_CS
);
3966 kvm_set_segment(vcpu
, &sregs
->ds
, VCPU_SREG_DS
);
3967 kvm_set_segment(vcpu
, &sregs
->es
, VCPU_SREG_ES
);
3968 kvm_set_segment(vcpu
, &sregs
->fs
, VCPU_SREG_FS
);
3969 kvm_set_segment(vcpu
, &sregs
->gs
, VCPU_SREG_GS
);
3970 kvm_set_segment(vcpu
, &sregs
->ss
, VCPU_SREG_SS
);
3972 kvm_set_segment(vcpu
, &sregs
->tr
, VCPU_SREG_TR
);
3973 kvm_set_segment(vcpu
, &sregs
->ldt
, VCPU_SREG_LDTR
);
3975 /* Older userspace won't unhalt the vcpu on reset. */
3976 if (vcpu
->vcpu_id
== 0 && kvm_rip_read(vcpu
) == 0xfff0 &&
3977 sregs
->cs
.selector
== 0xf000 && sregs
->cs
.base
== 0xffff0000 &&
3978 !(vcpu
->arch
.cr0
& X86_CR0_PE
))
3979 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
3986 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu
*vcpu
,
3987 struct kvm_debug_guest
*dbg
)
3993 r
= kvm_x86_ops
->set_guest_debug(vcpu
, dbg
);
4001 * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
4002 * we have asm/x86/processor.h
4013 u32 st_space
[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
4014 #ifdef CONFIG_X86_64
4015 u32 xmm_space
[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
4017 u32 xmm_space
[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
4022 * Translate a guest virtual address to a guest physical address.
4024 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
4025 struct kvm_translation
*tr
)
4027 unsigned long vaddr
= tr
->linear_address
;
4031 down_read(&vcpu
->kvm
->slots_lock
);
4032 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, vaddr
);
4033 up_read(&vcpu
->kvm
->slots_lock
);
4034 tr
->physical_address
= gpa
;
4035 tr
->valid
= gpa
!= UNMAPPED_GVA
;
4043 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
)
4045 struct fxsave
*fxsave
= (struct fxsave
*)&vcpu
->arch
.guest_fx_image
;
4049 memcpy(fpu
->fpr
, fxsave
->st_space
, 128);
4050 fpu
->fcw
= fxsave
->cwd
;
4051 fpu
->fsw
= fxsave
->swd
;
4052 fpu
->ftwx
= fxsave
->twd
;
4053 fpu
->last_opcode
= fxsave
->fop
;
4054 fpu
->last_ip
= fxsave
->rip
;
4055 fpu
->last_dp
= fxsave
->rdp
;
4056 memcpy(fpu
->xmm
, fxsave
->xmm_space
, sizeof fxsave
->xmm_space
);
4063 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
)
4065 struct fxsave
*fxsave
= (struct fxsave
*)&vcpu
->arch
.guest_fx_image
;
4069 memcpy(fxsave
->st_space
, fpu
->fpr
, 128);
4070 fxsave
->cwd
= fpu
->fcw
;
4071 fxsave
->swd
= fpu
->fsw
;
4072 fxsave
->twd
= fpu
->ftwx
;
4073 fxsave
->fop
= fpu
->last_opcode
;
4074 fxsave
->rip
= fpu
->last_ip
;
4075 fxsave
->rdp
= fpu
->last_dp
;
4076 memcpy(fxsave
->xmm_space
, fpu
->xmm
, sizeof fxsave
->xmm_space
);
4083 void fx_init(struct kvm_vcpu
*vcpu
)
4085 unsigned after_mxcsr_mask
;
4088 * Touch the fpu the first time in non atomic context as if
4089 * this is the first fpu instruction the exception handler
4090 * will fire before the instruction returns and it'll have to
4091 * allocate ram with GFP_KERNEL.
4094 kvm_fx_save(&vcpu
->arch
.host_fx_image
);
4096 /* Initialize guest FPU by resetting ours and saving into guest's */
4098 kvm_fx_save(&vcpu
->arch
.host_fx_image
);
4100 kvm_fx_save(&vcpu
->arch
.guest_fx_image
);
4101 kvm_fx_restore(&vcpu
->arch
.host_fx_image
);
4104 vcpu
->arch
.cr0
|= X86_CR0_ET
;
4105 after_mxcsr_mask
= offsetof(struct i387_fxsave_struct
, st_space
);
4106 vcpu
->arch
.guest_fx_image
.mxcsr
= 0x1f80;
4107 memset((void *)&vcpu
->arch
.guest_fx_image
+ after_mxcsr_mask
,
4108 0, sizeof(struct i387_fxsave_struct
) - after_mxcsr_mask
);
4110 EXPORT_SYMBOL_GPL(fx_init
);
4112 void kvm_load_guest_fpu(struct kvm_vcpu
*vcpu
)
4114 if (!vcpu
->fpu_active
|| vcpu
->guest_fpu_loaded
)
4117 vcpu
->guest_fpu_loaded
= 1;
4118 kvm_fx_save(&vcpu
->arch
.host_fx_image
);
4119 kvm_fx_restore(&vcpu
->arch
.guest_fx_image
);
4121 EXPORT_SYMBOL_GPL(kvm_load_guest_fpu
);
4123 void kvm_put_guest_fpu(struct kvm_vcpu
*vcpu
)
4125 if (!vcpu
->guest_fpu_loaded
)
4128 vcpu
->guest_fpu_loaded
= 0;
4129 kvm_fx_save(&vcpu
->arch
.guest_fx_image
);
4130 kvm_fx_restore(&vcpu
->arch
.host_fx_image
);
4131 ++vcpu
->stat
.fpu_reload
;
4133 EXPORT_SYMBOL_GPL(kvm_put_guest_fpu
);
4135 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
)
4137 kvm_x86_ops
->vcpu_free(vcpu
);
4140 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
,
4143 return kvm_x86_ops
->vcpu_create(kvm
, id
);
4146 int kvm_arch_vcpu_setup(struct kvm_vcpu
*vcpu
)
4150 /* We do fxsave: this must be aligned. */
4151 BUG_ON((unsigned long)&vcpu
->arch
.host_fx_image
& 0xF);
4154 r
= kvm_arch_vcpu_reset(vcpu
);
4156 r
= kvm_mmu_setup(vcpu
);
4163 kvm_x86_ops
->vcpu_free(vcpu
);
4167 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
)
4170 kvm_mmu_unload(vcpu
);
4173 kvm_x86_ops
->vcpu_free(vcpu
);
4176 int kvm_arch_vcpu_reset(struct kvm_vcpu
*vcpu
)
4178 return kvm_x86_ops
->vcpu_reset(vcpu
);
4181 void kvm_arch_hardware_enable(void *garbage
)
4183 kvm_x86_ops
->hardware_enable(garbage
);
4186 void kvm_arch_hardware_disable(void *garbage
)
4188 kvm_x86_ops
->hardware_disable(garbage
);
4191 int kvm_arch_hardware_setup(void)
4193 return kvm_x86_ops
->hardware_setup();
4196 void kvm_arch_hardware_unsetup(void)
4198 kvm_x86_ops
->hardware_unsetup();
4201 void kvm_arch_check_processor_compat(void *rtn
)
4203 kvm_x86_ops
->check_processor_compatibility(rtn
);
4206 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
)
4212 BUG_ON(vcpu
->kvm
== NULL
);
4215 vcpu
->arch
.mmu
.root_hpa
= INVALID_PAGE
;
4216 if (!irqchip_in_kernel(kvm
) || vcpu
->vcpu_id
== 0)
4217 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
4219 vcpu
->arch
.mp_state
= KVM_MP_STATE_UNINITIALIZED
;
4221 page
= alloc_page(GFP_KERNEL
| __GFP_ZERO
);
4226 vcpu
->arch
.pio_data
= page_address(page
);
4228 r
= kvm_mmu_create(vcpu
);
4230 goto fail_free_pio_data
;
4232 if (irqchip_in_kernel(kvm
)) {
4233 r
= kvm_create_lapic(vcpu
);
4235 goto fail_mmu_destroy
;
4241 kvm_mmu_destroy(vcpu
);
4243 free_page((unsigned long)vcpu
->arch
.pio_data
);
4248 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
)
4250 kvm_free_lapic(vcpu
);
4251 down_read(&vcpu
->kvm
->slots_lock
);
4252 kvm_mmu_destroy(vcpu
);
4253 up_read(&vcpu
->kvm
->slots_lock
);
4254 free_page((unsigned long)vcpu
->arch
.pio_data
);
4257 struct kvm
*kvm_arch_create_vm(void)
4259 struct kvm
*kvm
= kzalloc(sizeof(struct kvm
), GFP_KERNEL
);
4262 return ERR_PTR(-ENOMEM
);
4264 INIT_LIST_HEAD(&kvm
->arch
.active_mmu_pages
);
4265 INIT_LIST_HEAD(&kvm
->arch
.assigned_dev_head
);
4270 static void kvm_unload_vcpu_mmu(struct kvm_vcpu
*vcpu
)
4273 kvm_mmu_unload(vcpu
);
4277 static void kvm_free_vcpus(struct kvm
*kvm
)
4282 * Unpin any mmu pages first.
4284 for (i
= 0; i
< KVM_MAX_VCPUS
; ++i
)
4286 kvm_unload_vcpu_mmu(kvm
->vcpus
[i
]);
4287 for (i
= 0; i
< KVM_MAX_VCPUS
; ++i
) {
4288 if (kvm
->vcpus
[i
]) {
4289 kvm_arch_vcpu_free(kvm
->vcpus
[i
]);
4290 kvm
->vcpus
[i
] = NULL
;
4296 void kvm_arch_destroy_vm(struct kvm
*kvm
)
4298 kvm_iommu_unmap_guest(kvm
);
4299 kvm_free_all_assigned_devices(kvm
);
4301 kfree(kvm
->arch
.vpic
);
4302 kfree(kvm
->arch
.vioapic
);
4303 kvm_free_vcpus(kvm
);
4304 kvm_free_physmem(kvm
);
4305 if (kvm
->arch
.apic_access_page
)
4306 put_page(kvm
->arch
.apic_access_page
);
4307 if (kvm
->arch
.ept_identity_pagetable
)
4308 put_page(kvm
->arch
.ept_identity_pagetable
);
4312 int kvm_arch_set_memory_region(struct kvm
*kvm
,
4313 struct kvm_userspace_memory_region
*mem
,
4314 struct kvm_memory_slot old
,
4317 int npages
= mem
->memory_size
>> PAGE_SHIFT
;
4318 struct kvm_memory_slot
*memslot
= &kvm
->memslots
[mem
->slot
];
4320 /*To keep backward compatibility with older userspace,
4321 *x86 needs to hanlde !user_alloc case.
4324 if (npages
&& !old
.rmap
) {
4325 unsigned long userspace_addr
;
4327 down_write(¤t
->mm
->mmap_sem
);
4328 userspace_addr
= do_mmap(NULL
, 0,
4330 PROT_READ
| PROT_WRITE
,
4331 MAP_PRIVATE
| MAP_ANONYMOUS
,
4333 up_write(¤t
->mm
->mmap_sem
);
4335 if (IS_ERR((void *)userspace_addr
))
4336 return PTR_ERR((void *)userspace_addr
);
4338 /* set userspace_addr atomically for kvm_hva_to_rmapp */
4339 spin_lock(&kvm
->mmu_lock
);
4340 memslot
->userspace_addr
= userspace_addr
;
4341 spin_unlock(&kvm
->mmu_lock
);
4343 if (!old
.user_alloc
&& old
.rmap
) {
4346 down_write(¤t
->mm
->mmap_sem
);
4347 ret
= do_munmap(current
->mm
, old
.userspace_addr
,
4348 old
.npages
* PAGE_SIZE
);
4349 up_write(¤t
->mm
->mmap_sem
);
4352 "kvm_vm_ioctl_set_memory_region: "
4353 "failed to munmap memory\n");
4358 if (!kvm
->arch
.n_requested_mmu_pages
) {
4359 unsigned int nr_mmu_pages
= kvm_mmu_calculate_mmu_pages(kvm
);
4360 kvm_mmu_change_mmu_pages(kvm
, nr_mmu_pages
);
4363 kvm_mmu_slot_remove_write_access(kvm
, mem
->slot
);
4364 kvm_flush_remote_tlbs(kvm
);
4369 void kvm_arch_flush_shadow(struct kvm
*kvm
)
4371 kvm_mmu_zap_all(kvm
);
4374 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
)
4376 return vcpu
->arch
.mp_state
== KVM_MP_STATE_RUNNABLE
4377 || vcpu
->arch
.mp_state
== KVM_MP_STATE_SIPI_RECEIVED
;
4380 static void vcpu_kick_intr(void *info
)
4383 struct kvm_vcpu
*vcpu
= (struct kvm_vcpu
*)info
;
4384 printk(KERN_DEBUG
"vcpu_kick_intr %p \n", vcpu
);
4388 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
)
4390 int ipi_pcpu
= vcpu
->cpu
;
4391 int cpu
= get_cpu();
4393 if (waitqueue_active(&vcpu
->wq
)) {
4394 wake_up_interruptible(&vcpu
->wq
);
4395 ++vcpu
->stat
.halt_wakeup
;
4398 * We may be called synchronously with irqs disabled in guest mode,
4399 * So need not to call smp_call_function_single() in that case.
4401 if (vcpu
->guest_mode
&& vcpu
->cpu
!= cpu
)
4402 smp_call_function_single(ipi_pcpu
, vcpu_kick_intr
, vcpu
, 0);