2 * Kernel-based Virtual Machine driver for Linux
4 * derived from drivers/kvm/kvm_main.c
6 * Copyright (C) 2006 Qumranet, Inc.
9 * Avi Kivity <avi@qumranet.com>
10 * Yaniv Kamay <yaniv@qumranet.com>
12 * This work is licensed under the terms of the GNU GPL, version 2. See
13 * the COPYING file in the top-level directory.
17 #include <linux/kvm_host.h>
23 #include <linux/clocksource.h>
24 #include <linux/kvm.h>
26 #include <linux/vmalloc.h>
27 #include <linux/module.h>
28 #include <linux/mman.h>
29 #include <linux/highmem.h>
31 #include <asm/uaccess.h>
35 #define MAX_IO_MSRS 256
36 #define CR0_RESERVED_BITS \
37 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
38 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
39 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
40 #define CR4_RESERVED_BITS \
41 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
42 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \
43 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \
44 | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
46 #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
48 * - enable syscall per default because its emulated by KVM
49 * - enable LME and LMA per default on 64 bit KVM
52 static u64 __read_mostly efer_reserved_bits
= 0xfffffffffffffafeULL
;
54 static u64 __read_mostly efer_reserved_bits
= 0xfffffffffffffffeULL
;
57 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
58 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
60 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2
*cpuid
,
61 struct kvm_cpuid_entry2 __user
*entries
);
63 struct kvm_x86_ops
*kvm_x86_ops
;
65 struct kvm_stats_debugfs_item debugfs_entries
[] = {
66 { "pf_fixed", VCPU_STAT(pf_fixed
) },
67 { "pf_guest", VCPU_STAT(pf_guest
) },
68 { "tlb_flush", VCPU_STAT(tlb_flush
) },
69 { "invlpg", VCPU_STAT(invlpg
) },
70 { "exits", VCPU_STAT(exits
) },
71 { "io_exits", VCPU_STAT(io_exits
) },
72 { "mmio_exits", VCPU_STAT(mmio_exits
) },
73 { "signal_exits", VCPU_STAT(signal_exits
) },
74 { "irq_window", VCPU_STAT(irq_window_exits
) },
75 { "nmi_window", VCPU_STAT(nmi_window_exits
) },
76 { "halt_exits", VCPU_STAT(halt_exits
) },
77 { "halt_wakeup", VCPU_STAT(halt_wakeup
) },
78 { "hypercalls", VCPU_STAT(hypercalls
) },
79 { "request_irq", VCPU_STAT(request_irq_exits
) },
80 { "irq_exits", VCPU_STAT(irq_exits
) },
81 { "host_state_reload", VCPU_STAT(host_state_reload
) },
82 { "efer_reload", VCPU_STAT(efer_reload
) },
83 { "fpu_reload", VCPU_STAT(fpu_reload
) },
84 { "insn_emulation", VCPU_STAT(insn_emulation
) },
85 { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail
) },
86 { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped
) },
87 { "mmu_pte_write", VM_STAT(mmu_pte_write
) },
88 { "mmu_pte_updated", VM_STAT(mmu_pte_updated
) },
89 { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped
) },
90 { "mmu_flooded", VM_STAT(mmu_flooded
) },
91 { "mmu_recycled", VM_STAT(mmu_recycled
) },
92 { "mmu_cache_miss", VM_STAT(mmu_cache_miss
) },
93 { "remote_tlb_flush", VM_STAT(remote_tlb_flush
) },
94 { "largepages", VM_STAT(lpages
) },
99 unsigned long segment_base(u16 selector
)
101 struct descriptor_table gdt
;
102 struct desc_struct
*d
;
103 unsigned long table_base
;
109 asm("sgdt %0" : "=m"(gdt
));
110 table_base
= gdt
.base
;
112 if (selector
& 4) { /* from ldt */
115 asm("sldt %0" : "=g"(ldt_selector
));
116 table_base
= segment_base(ldt_selector
);
118 d
= (struct desc_struct
*)(table_base
+ (selector
& ~7));
119 v
= d
->base0
| ((unsigned long)d
->base1
<< 16) |
120 ((unsigned long)d
->base2
<< 24);
122 if (d
->s
== 0 && (d
->type
== 2 || d
->type
== 9 || d
->type
== 11))
123 v
|= ((unsigned long)((struct ldttss_desc64
*)d
)->base3
) << 32;
127 EXPORT_SYMBOL_GPL(segment_base
);
129 u64
kvm_get_apic_base(struct kvm_vcpu
*vcpu
)
131 if (irqchip_in_kernel(vcpu
->kvm
))
132 return vcpu
->arch
.apic_base
;
134 return vcpu
->arch
.apic_base
;
136 EXPORT_SYMBOL_GPL(kvm_get_apic_base
);
138 void kvm_set_apic_base(struct kvm_vcpu
*vcpu
, u64 data
)
140 /* TODO: reserve bits check */
141 if (irqchip_in_kernel(vcpu
->kvm
))
142 kvm_lapic_set_base(vcpu
, data
);
144 vcpu
->arch
.apic_base
= data
;
146 EXPORT_SYMBOL_GPL(kvm_set_apic_base
);
148 void kvm_queue_exception(struct kvm_vcpu
*vcpu
, unsigned nr
)
150 WARN_ON(vcpu
->arch
.exception
.pending
);
151 vcpu
->arch
.exception
.pending
= true;
152 vcpu
->arch
.exception
.has_error_code
= false;
153 vcpu
->arch
.exception
.nr
= nr
;
155 EXPORT_SYMBOL_GPL(kvm_queue_exception
);
157 void kvm_inject_page_fault(struct kvm_vcpu
*vcpu
, unsigned long addr
,
160 ++vcpu
->stat
.pf_guest
;
161 if (vcpu
->arch
.exception
.pending
) {
162 if (vcpu
->arch
.exception
.nr
== PF_VECTOR
) {
163 printk(KERN_DEBUG
"kvm: inject_page_fault:"
164 " double fault 0x%lx\n", addr
);
165 vcpu
->arch
.exception
.nr
= DF_VECTOR
;
166 vcpu
->arch
.exception
.error_code
= 0;
167 } else if (vcpu
->arch
.exception
.nr
== DF_VECTOR
) {
168 /* triple fault -> shutdown */
169 set_bit(KVM_REQ_TRIPLE_FAULT
, &vcpu
->requests
);
173 vcpu
->arch
.cr2
= addr
;
174 kvm_queue_exception_e(vcpu
, PF_VECTOR
, error_code
);
177 void kvm_inject_nmi(struct kvm_vcpu
*vcpu
)
179 vcpu
->arch
.nmi_pending
= 1;
181 EXPORT_SYMBOL_GPL(kvm_inject_nmi
);
183 void kvm_queue_exception_e(struct kvm_vcpu
*vcpu
, unsigned nr
, u32 error_code
)
185 WARN_ON(vcpu
->arch
.exception
.pending
);
186 vcpu
->arch
.exception
.pending
= true;
187 vcpu
->arch
.exception
.has_error_code
= true;
188 vcpu
->arch
.exception
.nr
= nr
;
189 vcpu
->arch
.exception
.error_code
= error_code
;
191 EXPORT_SYMBOL_GPL(kvm_queue_exception_e
);
193 static void __queue_exception(struct kvm_vcpu
*vcpu
)
195 kvm_x86_ops
->queue_exception(vcpu
, vcpu
->arch
.exception
.nr
,
196 vcpu
->arch
.exception
.has_error_code
,
197 vcpu
->arch
.exception
.error_code
);
201 * Load the pae pdptrs. Return true is they are all valid.
203 int load_pdptrs(struct kvm_vcpu
*vcpu
, unsigned long cr3
)
205 gfn_t pdpt_gfn
= cr3
>> PAGE_SHIFT
;
206 unsigned offset
= ((cr3
& (PAGE_SIZE
-1)) >> 5) << 2;
209 u64 pdpte
[ARRAY_SIZE(vcpu
->arch
.pdptrs
)];
211 ret
= kvm_read_guest_page(vcpu
->kvm
, pdpt_gfn
, pdpte
,
212 offset
* sizeof(u64
), sizeof(pdpte
));
217 for (i
= 0; i
< ARRAY_SIZE(pdpte
); ++i
) {
218 if ((pdpte
[i
] & 1) && (pdpte
[i
] & 0xfffffff0000001e6ull
)) {
225 memcpy(vcpu
->arch
.pdptrs
, pdpte
, sizeof(vcpu
->arch
.pdptrs
));
230 EXPORT_SYMBOL_GPL(load_pdptrs
);
232 static bool pdptrs_changed(struct kvm_vcpu
*vcpu
)
234 u64 pdpte
[ARRAY_SIZE(vcpu
->arch
.pdptrs
)];
238 if (is_long_mode(vcpu
) || !is_pae(vcpu
))
241 r
= kvm_read_guest(vcpu
->kvm
, vcpu
->arch
.cr3
& ~31u, pdpte
, sizeof(pdpte
));
244 changed
= memcmp(pdpte
, vcpu
->arch
.pdptrs
, sizeof(pdpte
)) != 0;
250 void kvm_set_cr0(struct kvm_vcpu
*vcpu
, unsigned long cr0
)
252 if (cr0
& CR0_RESERVED_BITS
) {
253 printk(KERN_DEBUG
"set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
254 cr0
, vcpu
->arch
.cr0
);
255 kvm_inject_gp(vcpu
, 0);
259 if ((cr0
& X86_CR0_NW
) && !(cr0
& X86_CR0_CD
)) {
260 printk(KERN_DEBUG
"set_cr0: #GP, CD == 0 && NW == 1\n");
261 kvm_inject_gp(vcpu
, 0);
265 if ((cr0
& X86_CR0_PG
) && !(cr0
& X86_CR0_PE
)) {
266 printk(KERN_DEBUG
"set_cr0: #GP, set PG flag "
267 "and a clear PE flag\n");
268 kvm_inject_gp(vcpu
, 0);
272 if (!is_paging(vcpu
) && (cr0
& X86_CR0_PG
)) {
274 if ((vcpu
->arch
.shadow_efer
& EFER_LME
)) {
278 printk(KERN_DEBUG
"set_cr0: #GP, start paging "
279 "in long mode while PAE is disabled\n");
280 kvm_inject_gp(vcpu
, 0);
283 kvm_x86_ops
->get_cs_db_l_bits(vcpu
, &cs_db
, &cs_l
);
285 printk(KERN_DEBUG
"set_cr0: #GP, start paging "
286 "in long mode while CS.L == 1\n");
287 kvm_inject_gp(vcpu
, 0);
293 if (is_pae(vcpu
) && !load_pdptrs(vcpu
, vcpu
->arch
.cr3
)) {
294 printk(KERN_DEBUG
"set_cr0: #GP, pdptrs "
296 kvm_inject_gp(vcpu
, 0);
302 kvm_x86_ops
->set_cr0(vcpu
, cr0
);
303 vcpu
->arch
.cr0
= cr0
;
305 kvm_mmu_reset_context(vcpu
);
308 EXPORT_SYMBOL_GPL(kvm_set_cr0
);
310 void kvm_lmsw(struct kvm_vcpu
*vcpu
, unsigned long msw
)
312 kvm_set_cr0(vcpu
, (vcpu
->arch
.cr0
& ~0x0ful
) | (msw
& 0x0f));
313 KVMTRACE_1D(LMSW
, vcpu
,
314 (u32
)((vcpu
->arch
.cr0
& ~0x0ful
) | (msw
& 0x0f)),
317 EXPORT_SYMBOL_GPL(kvm_lmsw
);
319 void kvm_set_cr4(struct kvm_vcpu
*vcpu
, unsigned long cr4
)
321 if (cr4
& CR4_RESERVED_BITS
) {
322 printk(KERN_DEBUG
"set_cr4: #GP, reserved bits\n");
323 kvm_inject_gp(vcpu
, 0);
327 if (is_long_mode(vcpu
)) {
328 if (!(cr4
& X86_CR4_PAE
)) {
329 printk(KERN_DEBUG
"set_cr4: #GP, clearing PAE while "
331 kvm_inject_gp(vcpu
, 0);
334 } else if (is_paging(vcpu
) && !is_pae(vcpu
) && (cr4
& X86_CR4_PAE
)
335 && !load_pdptrs(vcpu
, vcpu
->arch
.cr3
)) {
336 printk(KERN_DEBUG
"set_cr4: #GP, pdptrs reserved bits\n");
337 kvm_inject_gp(vcpu
, 0);
341 if (cr4
& X86_CR4_VMXE
) {
342 printk(KERN_DEBUG
"set_cr4: #GP, setting VMXE\n");
343 kvm_inject_gp(vcpu
, 0);
346 kvm_x86_ops
->set_cr4(vcpu
, cr4
);
347 vcpu
->arch
.cr4
= cr4
;
348 kvm_mmu_reset_context(vcpu
);
350 EXPORT_SYMBOL_GPL(kvm_set_cr4
);
352 void kvm_set_cr3(struct kvm_vcpu
*vcpu
, unsigned long cr3
)
354 if (cr3
== vcpu
->arch
.cr3
&& !pdptrs_changed(vcpu
)) {
355 kvm_mmu_flush_tlb(vcpu
);
359 if (is_long_mode(vcpu
)) {
360 if (cr3
& CR3_L_MODE_RESERVED_BITS
) {
361 printk(KERN_DEBUG
"set_cr3: #GP, reserved bits\n");
362 kvm_inject_gp(vcpu
, 0);
367 if (cr3
& CR3_PAE_RESERVED_BITS
) {
369 "set_cr3: #GP, reserved bits\n");
370 kvm_inject_gp(vcpu
, 0);
373 if (is_paging(vcpu
) && !load_pdptrs(vcpu
, cr3
)) {
374 printk(KERN_DEBUG
"set_cr3: #GP, pdptrs "
376 kvm_inject_gp(vcpu
, 0);
381 * We don't check reserved bits in nonpae mode, because
382 * this isn't enforced, and VMware depends on this.
387 * Does the new cr3 value map to physical memory? (Note, we
388 * catch an invalid cr3 even in real-mode, because it would
389 * cause trouble later on when we turn on paging anyway.)
391 * A real CPU would silently accept an invalid cr3 and would
392 * attempt to use it - with largely undefined (and often hard
393 * to debug) behavior on the guest side.
395 if (unlikely(!gfn_to_memslot(vcpu
->kvm
, cr3
>> PAGE_SHIFT
)))
396 kvm_inject_gp(vcpu
, 0);
398 vcpu
->arch
.cr3
= cr3
;
399 vcpu
->arch
.mmu
.new_cr3(vcpu
);
402 EXPORT_SYMBOL_GPL(kvm_set_cr3
);
404 void kvm_set_cr8(struct kvm_vcpu
*vcpu
, unsigned long cr8
)
406 if (cr8
& CR8_RESERVED_BITS
) {
407 printk(KERN_DEBUG
"set_cr8: #GP, reserved bits 0x%lx\n", cr8
);
408 kvm_inject_gp(vcpu
, 0);
411 if (irqchip_in_kernel(vcpu
->kvm
))
412 kvm_lapic_set_tpr(vcpu
, cr8
);
414 vcpu
->arch
.cr8
= cr8
;
416 EXPORT_SYMBOL_GPL(kvm_set_cr8
);
418 unsigned long kvm_get_cr8(struct kvm_vcpu
*vcpu
)
420 if (irqchip_in_kernel(vcpu
->kvm
))
421 return kvm_lapic_get_cr8(vcpu
);
423 return vcpu
->arch
.cr8
;
425 EXPORT_SYMBOL_GPL(kvm_get_cr8
);
428 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
429 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
431 * This list is modified at module load time to reflect the
432 * capabilities of the host cpu.
434 static u32 msrs_to_save
[] = {
435 MSR_IA32_SYSENTER_CS
, MSR_IA32_SYSENTER_ESP
, MSR_IA32_SYSENTER_EIP
,
438 MSR_CSTAR
, MSR_KERNEL_GS_BASE
, MSR_SYSCALL_MASK
, MSR_LSTAR
,
440 MSR_IA32_TIME_STAMP_COUNTER
, MSR_KVM_SYSTEM_TIME
, MSR_KVM_WALL_CLOCK
,
441 MSR_IA32_PERF_STATUS
,
444 static unsigned num_msrs_to_save
;
446 static u32 emulated_msrs
[] = {
447 MSR_IA32_MISC_ENABLE
,
450 static void set_efer(struct kvm_vcpu
*vcpu
, u64 efer
)
452 if (efer
& efer_reserved_bits
) {
453 printk(KERN_DEBUG
"set_efer: 0x%llx #GP, reserved bits\n",
455 kvm_inject_gp(vcpu
, 0);
460 && (vcpu
->arch
.shadow_efer
& EFER_LME
) != (efer
& EFER_LME
)) {
461 printk(KERN_DEBUG
"set_efer: #GP, change LME while paging\n");
462 kvm_inject_gp(vcpu
, 0);
466 kvm_x86_ops
->set_efer(vcpu
, efer
);
469 efer
|= vcpu
->arch
.shadow_efer
& EFER_LMA
;
471 vcpu
->arch
.shadow_efer
= efer
;
474 void kvm_enable_efer_bits(u64 mask
)
476 efer_reserved_bits
&= ~mask
;
478 EXPORT_SYMBOL_GPL(kvm_enable_efer_bits
);
482 * Writes msr value into into the appropriate "register".
483 * Returns 0 on success, non-0 otherwise.
484 * Assumes vcpu_load() was already called.
486 int kvm_set_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64 data
)
488 return kvm_x86_ops
->set_msr(vcpu
, msr_index
, data
);
492 * Adapt set_msr() to msr_io()'s calling convention
494 static int do_set_msr(struct kvm_vcpu
*vcpu
, unsigned index
, u64
*data
)
496 return kvm_set_msr(vcpu
, index
, *data
);
499 static void kvm_write_wall_clock(struct kvm
*kvm
, gpa_t wall_clock
)
502 struct pvclock_wall_clock wc
;
503 struct timespec now
, sys
, boot
;
510 kvm_write_guest(kvm
, wall_clock
, &version
, sizeof(version
));
513 * The guest calculates current wall clock time by adding
514 * system time (updated by kvm_write_guest_time below) to the
515 * wall clock specified here. guest system time equals host
516 * system time for us, thus we must fill in host boot time here.
518 now
= current_kernel_time();
520 boot
= ns_to_timespec(timespec_to_ns(&now
) - timespec_to_ns(&sys
));
522 wc
.sec
= boot
.tv_sec
;
523 wc
.nsec
= boot
.tv_nsec
;
524 wc
.version
= version
;
526 kvm_write_guest(kvm
, wall_clock
, &wc
, sizeof(wc
));
529 kvm_write_guest(kvm
, wall_clock
, &version
, sizeof(version
));
532 static uint32_t div_frac(uint32_t dividend
, uint32_t divisor
)
534 uint32_t quotient
, remainder
;
536 /* Don't try to replace with do_div(), this one calculates
537 * "(dividend << 32) / divisor" */
539 : "=a" (quotient
), "=d" (remainder
)
540 : "0" (0), "1" (dividend
), "r" (divisor
) );
544 static void kvm_set_time_scale(uint32_t tsc_khz
, struct pvclock_vcpu_time_info
*hv_clock
)
546 uint64_t nsecs
= 1000000000LL;
551 tps64
= tsc_khz
* 1000LL;
552 while (tps64
> nsecs
*2) {
557 tps32
= (uint32_t)tps64
;
558 while (tps32
<= (uint32_t)nsecs
) {
563 hv_clock
->tsc_shift
= shift
;
564 hv_clock
->tsc_to_system_mul
= div_frac(nsecs
, tps32
);
566 pr_debug("%s: tsc_khz %u, tsc_shift %d, tsc_mul %u\n",
567 __FUNCTION__
, tsc_khz
, hv_clock
->tsc_shift
,
568 hv_clock
->tsc_to_system_mul
);
571 static void kvm_write_guest_time(struct kvm_vcpu
*v
)
575 struct kvm_vcpu_arch
*vcpu
= &v
->arch
;
578 if ((!vcpu
->time_page
))
581 if (unlikely(vcpu
->hv_clock_tsc_khz
!= tsc_khz
)) {
582 kvm_set_time_scale(tsc_khz
, &vcpu
->hv_clock
);
583 vcpu
->hv_clock_tsc_khz
= tsc_khz
;
586 /* Keep irq disabled to prevent changes to the clock */
587 local_irq_save(flags
);
588 kvm_get_msr(v
, MSR_IA32_TIME_STAMP_COUNTER
,
589 &vcpu
->hv_clock
.tsc_timestamp
);
591 local_irq_restore(flags
);
593 /* With all the info we got, fill in the values */
595 vcpu
->hv_clock
.system_time
= ts
.tv_nsec
+
596 (NSEC_PER_SEC
* (u64
)ts
.tv_sec
);
598 * The interface expects us to write an even number signaling that the
599 * update is finished. Since the guest won't see the intermediate
600 * state, we just increase by 2 at the end.
602 vcpu
->hv_clock
.version
+= 2;
604 shared_kaddr
= kmap_atomic(vcpu
->time_page
, KM_USER0
);
606 memcpy(shared_kaddr
+ vcpu
->time_offset
, &vcpu
->hv_clock
,
607 sizeof(vcpu
->hv_clock
));
609 kunmap_atomic(shared_kaddr
, KM_USER0
);
611 mark_page_dirty(v
->kvm
, vcpu
->time
>> PAGE_SHIFT
);
614 static bool msr_mtrr_valid(unsigned msr
)
617 case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR
- 1:
618 case MSR_MTRRfix64K_00000
:
619 case MSR_MTRRfix16K_80000
:
620 case MSR_MTRRfix16K_A0000
:
621 case MSR_MTRRfix4K_C0000
:
622 case MSR_MTRRfix4K_C8000
:
623 case MSR_MTRRfix4K_D0000
:
624 case MSR_MTRRfix4K_D8000
:
625 case MSR_MTRRfix4K_E0000
:
626 case MSR_MTRRfix4K_E8000
:
627 case MSR_MTRRfix4K_F0000
:
628 case MSR_MTRRfix4K_F8000
:
629 case MSR_MTRRdefType
:
630 case MSR_IA32_CR_PAT
:
638 static int set_msr_mtrr(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
640 if (!msr_mtrr_valid(msr
))
643 vcpu
->arch
.mtrr
[msr
- 0x200] = data
;
647 int kvm_set_msr_common(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
651 set_efer(vcpu
, data
);
653 case MSR_IA32_MC0_STATUS
:
654 pr_unimpl(vcpu
, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n",
657 case MSR_IA32_MCG_STATUS
:
658 pr_unimpl(vcpu
, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n",
661 case MSR_IA32_MCG_CTL
:
662 pr_unimpl(vcpu
, "%s: MSR_IA32_MCG_CTL 0x%llx, nop\n",
665 case MSR_IA32_UCODE_REV
:
666 case MSR_IA32_UCODE_WRITE
:
668 case 0x200 ... 0x2ff:
669 return set_msr_mtrr(vcpu
, msr
, data
);
670 case MSR_IA32_APICBASE
:
671 kvm_set_apic_base(vcpu
, data
);
673 case MSR_IA32_MISC_ENABLE
:
674 vcpu
->arch
.ia32_misc_enable_msr
= data
;
676 case MSR_KVM_WALL_CLOCK
:
677 vcpu
->kvm
->arch
.wall_clock
= data
;
678 kvm_write_wall_clock(vcpu
->kvm
, data
);
680 case MSR_KVM_SYSTEM_TIME
: {
681 if (vcpu
->arch
.time_page
) {
682 kvm_release_page_dirty(vcpu
->arch
.time_page
);
683 vcpu
->arch
.time_page
= NULL
;
686 vcpu
->arch
.time
= data
;
688 /* we verify if the enable bit is set... */
692 /* ...but clean it before doing the actual write */
693 vcpu
->arch
.time_offset
= data
& ~(PAGE_MASK
| 1);
695 down_read(¤t
->mm
->mmap_sem
);
696 vcpu
->arch
.time_page
=
697 gfn_to_page(vcpu
->kvm
, data
>> PAGE_SHIFT
);
698 up_read(¤t
->mm
->mmap_sem
);
700 if (is_error_page(vcpu
->arch
.time_page
)) {
701 kvm_release_page_clean(vcpu
->arch
.time_page
);
702 vcpu
->arch
.time_page
= NULL
;
705 kvm_write_guest_time(vcpu
);
709 pr_unimpl(vcpu
, "unhandled wrmsr: 0x%x data %llx\n", msr
, data
);
714 EXPORT_SYMBOL_GPL(kvm_set_msr_common
);
718 * Reads an msr value (of 'msr_index') into 'pdata'.
719 * Returns 0 on success, non-0 otherwise.
720 * Assumes vcpu_load() was already called.
722 int kvm_get_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64
*pdata
)
724 return kvm_x86_ops
->get_msr(vcpu
, msr_index
, pdata
);
727 static int get_msr_mtrr(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
)
729 if (!msr_mtrr_valid(msr
))
732 *pdata
= vcpu
->arch
.mtrr
[msr
- 0x200];
736 int kvm_get_msr_common(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
)
741 case 0xc0010010: /* SYSCFG */
742 case 0xc0010015: /* HWCR */
743 case MSR_IA32_PLATFORM_ID
:
744 case MSR_IA32_P5_MC_ADDR
:
745 case MSR_IA32_P5_MC_TYPE
:
746 case MSR_IA32_MC0_CTL
:
747 case MSR_IA32_MCG_STATUS
:
748 case MSR_IA32_MCG_CAP
:
749 case MSR_IA32_MCG_CTL
:
750 case MSR_IA32_MC0_MISC
:
751 case MSR_IA32_MC0_MISC
+4:
752 case MSR_IA32_MC0_MISC
+8:
753 case MSR_IA32_MC0_MISC
+12:
754 case MSR_IA32_MC0_MISC
+16:
755 case MSR_IA32_UCODE_REV
:
756 case MSR_IA32_EBL_CR_POWERON
:
760 data
= 0x500 | KVM_NR_VAR_MTRR
;
762 case 0x200 ... 0x2ff:
763 return get_msr_mtrr(vcpu
, msr
, pdata
);
764 case 0xcd: /* fsb frequency */
767 case MSR_IA32_APICBASE
:
768 data
= kvm_get_apic_base(vcpu
);
770 case MSR_IA32_MISC_ENABLE
:
771 data
= vcpu
->arch
.ia32_misc_enable_msr
;
773 case MSR_IA32_PERF_STATUS
:
774 /* TSC increment by tick */
777 data
|= (((uint64_t)4ULL) << 40);
780 data
= vcpu
->arch
.shadow_efer
;
782 case MSR_KVM_WALL_CLOCK
:
783 data
= vcpu
->kvm
->arch
.wall_clock
;
785 case MSR_KVM_SYSTEM_TIME
:
786 data
= vcpu
->arch
.time
;
789 pr_unimpl(vcpu
, "unhandled rdmsr: 0x%x\n", msr
);
795 EXPORT_SYMBOL_GPL(kvm_get_msr_common
);
798 * Read or write a bunch of msrs. All parameters are kernel addresses.
800 * @return number of msrs set successfully.
802 static int __msr_io(struct kvm_vcpu
*vcpu
, struct kvm_msrs
*msrs
,
803 struct kvm_msr_entry
*entries
,
804 int (*do_msr
)(struct kvm_vcpu
*vcpu
,
805 unsigned index
, u64
*data
))
811 down_read(&vcpu
->kvm
->slots_lock
);
812 for (i
= 0; i
< msrs
->nmsrs
; ++i
)
813 if (do_msr(vcpu
, entries
[i
].index
, &entries
[i
].data
))
815 up_read(&vcpu
->kvm
->slots_lock
);
823 * Read or write a bunch of msrs. Parameters are user addresses.
825 * @return number of msrs set successfully.
827 static int msr_io(struct kvm_vcpu
*vcpu
, struct kvm_msrs __user
*user_msrs
,
828 int (*do_msr
)(struct kvm_vcpu
*vcpu
,
829 unsigned index
, u64
*data
),
832 struct kvm_msrs msrs
;
833 struct kvm_msr_entry
*entries
;
838 if (copy_from_user(&msrs
, user_msrs
, sizeof msrs
))
842 if (msrs
.nmsrs
>= MAX_IO_MSRS
)
846 size
= sizeof(struct kvm_msr_entry
) * msrs
.nmsrs
;
847 entries
= vmalloc(size
);
852 if (copy_from_user(entries
, user_msrs
->entries
, size
))
855 r
= n
= __msr_io(vcpu
, &msrs
, entries
, do_msr
);
860 if (writeback
&& copy_to_user(user_msrs
->entries
, entries
, size
))
871 int kvm_dev_ioctl_check_extension(long ext
)
876 case KVM_CAP_IRQCHIP
:
878 case KVM_CAP_MMU_SHADOW_CACHE_CONTROL
:
879 case KVM_CAP_USER_MEMORY
:
880 case KVM_CAP_SET_TSS_ADDR
:
881 case KVM_CAP_EXT_CPUID
:
882 case KVM_CAP_CLOCKSOURCE
:
884 case KVM_CAP_NOP_IO_DELAY
:
885 case KVM_CAP_MP_STATE
:
888 case KVM_CAP_COALESCED_MMIO
:
889 r
= KVM_COALESCED_MMIO_PAGE_OFFSET
;
892 r
= !kvm_x86_ops
->cpu_has_accelerated_tpr();
894 case KVM_CAP_NR_VCPUS
:
897 case KVM_CAP_NR_MEMSLOTS
:
898 r
= KVM_MEMORY_SLOTS
;
911 long kvm_arch_dev_ioctl(struct file
*filp
,
912 unsigned int ioctl
, unsigned long arg
)
914 void __user
*argp
= (void __user
*)arg
;
918 case KVM_GET_MSR_INDEX_LIST
: {
919 struct kvm_msr_list __user
*user_msr_list
= argp
;
920 struct kvm_msr_list msr_list
;
924 if (copy_from_user(&msr_list
, user_msr_list
, sizeof msr_list
))
927 msr_list
.nmsrs
= num_msrs_to_save
+ ARRAY_SIZE(emulated_msrs
);
928 if (copy_to_user(user_msr_list
, &msr_list
, sizeof msr_list
))
931 if (n
< num_msrs_to_save
)
934 if (copy_to_user(user_msr_list
->indices
, &msrs_to_save
,
935 num_msrs_to_save
* sizeof(u32
)))
937 if (copy_to_user(user_msr_list
->indices
938 + num_msrs_to_save
* sizeof(u32
),
940 ARRAY_SIZE(emulated_msrs
) * sizeof(u32
)))
945 case KVM_GET_SUPPORTED_CPUID
: {
946 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
947 struct kvm_cpuid2 cpuid
;
950 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
952 r
= kvm_dev_ioctl_get_supported_cpuid(&cpuid
,
958 if (copy_to_user(cpuid_arg
, &cpuid
, sizeof cpuid
))
970 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
)
972 kvm_x86_ops
->vcpu_load(vcpu
, cpu
);
973 kvm_write_guest_time(vcpu
);
976 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
)
978 kvm_x86_ops
->vcpu_put(vcpu
);
979 kvm_put_guest_fpu(vcpu
);
982 static int is_efer_nx(void)
986 rdmsrl(MSR_EFER
, efer
);
987 return efer
& EFER_NX
;
990 static void cpuid_fix_nx_cap(struct kvm_vcpu
*vcpu
)
993 struct kvm_cpuid_entry2
*e
, *entry
;
996 for (i
= 0; i
< vcpu
->arch
.cpuid_nent
; ++i
) {
997 e
= &vcpu
->arch
.cpuid_entries
[i
];
998 if (e
->function
== 0x80000001) {
1003 if (entry
&& (entry
->edx
& (1 << 20)) && !is_efer_nx()) {
1004 entry
->edx
&= ~(1 << 20);
1005 printk(KERN_INFO
"kvm: guest NX capability removed\n");
1009 /* when an old userspace process fills a new kernel module */
1010 static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu
*vcpu
,
1011 struct kvm_cpuid
*cpuid
,
1012 struct kvm_cpuid_entry __user
*entries
)
1015 struct kvm_cpuid_entry
*cpuid_entries
;
1018 if (cpuid
->nent
> KVM_MAX_CPUID_ENTRIES
)
1021 cpuid_entries
= vmalloc(sizeof(struct kvm_cpuid_entry
) * cpuid
->nent
);
1025 if (copy_from_user(cpuid_entries
, entries
,
1026 cpuid
->nent
* sizeof(struct kvm_cpuid_entry
)))
1028 for (i
= 0; i
< cpuid
->nent
; i
++) {
1029 vcpu
->arch
.cpuid_entries
[i
].function
= cpuid_entries
[i
].function
;
1030 vcpu
->arch
.cpuid_entries
[i
].eax
= cpuid_entries
[i
].eax
;
1031 vcpu
->arch
.cpuid_entries
[i
].ebx
= cpuid_entries
[i
].ebx
;
1032 vcpu
->arch
.cpuid_entries
[i
].ecx
= cpuid_entries
[i
].ecx
;
1033 vcpu
->arch
.cpuid_entries
[i
].edx
= cpuid_entries
[i
].edx
;
1034 vcpu
->arch
.cpuid_entries
[i
].index
= 0;
1035 vcpu
->arch
.cpuid_entries
[i
].flags
= 0;
1036 vcpu
->arch
.cpuid_entries
[i
].padding
[0] = 0;
1037 vcpu
->arch
.cpuid_entries
[i
].padding
[1] = 0;
1038 vcpu
->arch
.cpuid_entries
[i
].padding
[2] = 0;
1040 vcpu
->arch
.cpuid_nent
= cpuid
->nent
;
1041 cpuid_fix_nx_cap(vcpu
);
1045 vfree(cpuid_entries
);
1050 static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu
*vcpu
,
1051 struct kvm_cpuid2
*cpuid
,
1052 struct kvm_cpuid_entry2 __user
*entries
)
1057 if (cpuid
->nent
> KVM_MAX_CPUID_ENTRIES
)
1060 if (copy_from_user(&vcpu
->arch
.cpuid_entries
, entries
,
1061 cpuid
->nent
* sizeof(struct kvm_cpuid_entry2
)))
1063 vcpu
->arch
.cpuid_nent
= cpuid
->nent
;
1070 static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu
*vcpu
,
1071 struct kvm_cpuid2
*cpuid
,
1072 struct kvm_cpuid_entry2 __user
*entries
)
1077 if (cpuid
->nent
< vcpu
->arch
.cpuid_nent
)
1080 if (copy_to_user(entries
, &vcpu
->arch
.cpuid_entries
,
1081 vcpu
->arch
.cpuid_nent
* sizeof(struct kvm_cpuid_entry2
)))
1086 cpuid
->nent
= vcpu
->arch
.cpuid_nent
;
1090 static inline u32
bit(int bitno
)
1092 return 1 << (bitno
& 31);
1095 static void do_cpuid_1_ent(struct kvm_cpuid_entry2
*entry
, u32 function
,
1098 entry
->function
= function
;
1099 entry
->index
= index
;
1100 cpuid_count(entry
->function
, entry
->index
,
1101 &entry
->eax
, &entry
->ebx
, &entry
->ecx
, &entry
->edx
);
1105 static void do_cpuid_ent(struct kvm_cpuid_entry2
*entry
, u32 function
,
1106 u32 index
, int *nent
, int maxnent
)
1108 const u32 kvm_supported_word0_x86_features
= bit(X86_FEATURE_FPU
) |
1109 bit(X86_FEATURE_VME
) | bit(X86_FEATURE_DE
) |
1110 bit(X86_FEATURE_PSE
) | bit(X86_FEATURE_TSC
) |
1111 bit(X86_FEATURE_MSR
) | bit(X86_FEATURE_PAE
) |
1112 bit(X86_FEATURE_CX8
) | bit(X86_FEATURE_APIC
) |
1113 bit(X86_FEATURE_SEP
) | bit(X86_FEATURE_PGE
) |
1114 bit(X86_FEATURE_CMOV
) | bit(X86_FEATURE_PSE36
) |
1115 bit(X86_FEATURE_CLFLSH
) | bit(X86_FEATURE_MMX
) |
1116 bit(X86_FEATURE_FXSR
) | bit(X86_FEATURE_XMM
) |
1117 bit(X86_FEATURE_XMM2
) | bit(X86_FEATURE_SELFSNOOP
);
1118 const u32 kvm_supported_word1_x86_features
= bit(X86_FEATURE_FPU
) |
1119 bit(X86_FEATURE_VME
) | bit(X86_FEATURE_DE
) |
1120 bit(X86_FEATURE_PSE
) | bit(X86_FEATURE_TSC
) |
1121 bit(X86_FEATURE_MSR
) | bit(X86_FEATURE_PAE
) |
1122 bit(X86_FEATURE_CX8
) | bit(X86_FEATURE_APIC
) |
1123 bit(X86_FEATURE_PGE
) |
1124 bit(X86_FEATURE_CMOV
) | bit(X86_FEATURE_PSE36
) |
1125 bit(X86_FEATURE_MMX
) | bit(X86_FEATURE_FXSR
) |
1126 bit(X86_FEATURE_SYSCALL
) |
1127 (bit(X86_FEATURE_NX
) && is_efer_nx()) |
1128 #ifdef CONFIG_X86_64
1129 bit(X86_FEATURE_LM
) |
1131 bit(X86_FEATURE_MMXEXT
) |
1132 bit(X86_FEATURE_3DNOWEXT
) |
1133 bit(X86_FEATURE_3DNOW
);
1134 const u32 kvm_supported_word3_x86_features
=
1135 bit(X86_FEATURE_XMM3
) | bit(X86_FEATURE_CX16
);
1136 const u32 kvm_supported_word6_x86_features
=
1137 bit(X86_FEATURE_LAHF_LM
) | bit(X86_FEATURE_CMP_LEGACY
);
1139 /* all func 2 cpuid_count() should be called on the same cpu */
1141 do_cpuid_1_ent(entry
, function
, index
);
1146 entry
->eax
= min(entry
->eax
, (u32
)0xb);
1149 entry
->edx
&= kvm_supported_word0_x86_features
;
1150 entry
->ecx
&= kvm_supported_word3_x86_features
;
1152 /* function 2 entries are STATEFUL. That is, repeated cpuid commands
1153 * may return different values. This forces us to get_cpu() before
1154 * issuing the first command, and also to emulate this annoying behavior
1155 * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */
1157 int t
, times
= entry
->eax
& 0xff;
1159 entry
->flags
|= KVM_CPUID_FLAG_STATEFUL_FUNC
;
1160 for (t
= 1; t
< times
&& *nent
< maxnent
; ++t
) {
1161 do_cpuid_1_ent(&entry
[t
], function
, 0);
1162 entry
[t
].flags
|= KVM_CPUID_FLAG_STATEFUL_FUNC
;
1167 /* function 4 and 0xb have additional index. */
1171 entry
->flags
|= KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1172 /* read more entries until cache_type is zero */
1173 for (i
= 1; *nent
< maxnent
; ++i
) {
1174 cache_type
= entry
[i
- 1].eax
& 0x1f;
1177 do_cpuid_1_ent(&entry
[i
], function
, i
);
1179 KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1187 entry
->flags
|= KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1188 /* read more entries until level_type is zero */
1189 for (i
= 1; *nent
< maxnent
; ++i
) {
1190 level_type
= entry
[i
- 1].ecx
& 0xff;
1193 do_cpuid_1_ent(&entry
[i
], function
, i
);
1195 KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1201 entry
->eax
= min(entry
->eax
, 0x8000001a);
1204 entry
->edx
&= kvm_supported_word1_x86_features
;
1205 entry
->ecx
&= kvm_supported_word6_x86_features
;
1211 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2
*cpuid
,
1212 struct kvm_cpuid_entry2 __user
*entries
)
1214 struct kvm_cpuid_entry2
*cpuid_entries
;
1215 int limit
, nent
= 0, r
= -E2BIG
;
1218 if (cpuid
->nent
< 1)
1221 cpuid_entries
= vmalloc(sizeof(struct kvm_cpuid_entry2
) * cpuid
->nent
);
1225 do_cpuid_ent(&cpuid_entries
[0], 0, 0, &nent
, cpuid
->nent
);
1226 limit
= cpuid_entries
[0].eax
;
1227 for (func
= 1; func
<= limit
&& nent
< cpuid
->nent
; ++func
)
1228 do_cpuid_ent(&cpuid_entries
[nent
], func
, 0,
1229 &nent
, cpuid
->nent
);
1231 if (nent
>= cpuid
->nent
)
1234 do_cpuid_ent(&cpuid_entries
[nent
], 0x80000000, 0, &nent
, cpuid
->nent
);
1235 limit
= cpuid_entries
[nent
- 1].eax
;
1236 for (func
= 0x80000001; func
<= limit
&& nent
< cpuid
->nent
; ++func
)
1237 do_cpuid_ent(&cpuid_entries
[nent
], func
, 0,
1238 &nent
, cpuid
->nent
);
1240 if (copy_to_user(entries
, cpuid_entries
,
1241 nent
* sizeof(struct kvm_cpuid_entry2
)))
1247 vfree(cpuid_entries
);
1252 static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu
*vcpu
,
1253 struct kvm_lapic_state
*s
)
1256 memcpy(s
->regs
, vcpu
->arch
.apic
->regs
, sizeof *s
);
1262 static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu
*vcpu
,
1263 struct kvm_lapic_state
*s
)
1266 memcpy(vcpu
->arch
.apic
->regs
, s
->regs
, sizeof *s
);
1267 kvm_apic_post_state_restore(vcpu
);
1273 static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu
*vcpu
,
1274 struct kvm_interrupt
*irq
)
1276 if (irq
->irq
< 0 || irq
->irq
>= 256)
1278 if (irqchip_in_kernel(vcpu
->kvm
))
1282 set_bit(irq
->irq
, vcpu
->arch
.irq_pending
);
1283 set_bit(irq
->irq
/ BITS_PER_LONG
, &vcpu
->arch
.irq_summary
);
1290 static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu
*vcpu
,
1291 struct kvm_tpr_access_ctl
*tac
)
1295 vcpu
->arch
.tpr_access_reporting
= !!tac
->enabled
;
1299 long kvm_arch_vcpu_ioctl(struct file
*filp
,
1300 unsigned int ioctl
, unsigned long arg
)
1302 struct kvm_vcpu
*vcpu
= filp
->private_data
;
1303 void __user
*argp
= (void __user
*)arg
;
1307 case KVM_GET_LAPIC
: {
1308 struct kvm_lapic_state lapic
;
1310 memset(&lapic
, 0, sizeof lapic
);
1311 r
= kvm_vcpu_ioctl_get_lapic(vcpu
, &lapic
);
1315 if (copy_to_user(argp
, &lapic
, sizeof lapic
))
1320 case KVM_SET_LAPIC
: {
1321 struct kvm_lapic_state lapic
;
1324 if (copy_from_user(&lapic
, argp
, sizeof lapic
))
1326 r
= kvm_vcpu_ioctl_set_lapic(vcpu
, &lapic
);;
1332 case KVM_INTERRUPT
: {
1333 struct kvm_interrupt irq
;
1336 if (copy_from_user(&irq
, argp
, sizeof irq
))
1338 r
= kvm_vcpu_ioctl_interrupt(vcpu
, &irq
);
1344 case KVM_SET_CPUID
: {
1345 struct kvm_cpuid __user
*cpuid_arg
= argp
;
1346 struct kvm_cpuid cpuid
;
1349 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1351 r
= kvm_vcpu_ioctl_set_cpuid(vcpu
, &cpuid
, cpuid_arg
->entries
);
1356 case KVM_SET_CPUID2
: {
1357 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
1358 struct kvm_cpuid2 cpuid
;
1361 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1363 r
= kvm_vcpu_ioctl_set_cpuid2(vcpu
, &cpuid
,
1364 cpuid_arg
->entries
);
1369 case KVM_GET_CPUID2
: {
1370 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
1371 struct kvm_cpuid2 cpuid
;
1374 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1376 r
= kvm_vcpu_ioctl_get_cpuid2(vcpu
, &cpuid
,
1377 cpuid_arg
->entries
);
1381 if (copy_to_user(cpuid_arg
, &cpuid
, sizeof cpuid
))
1387 r
= msr_io(vcpu
, argp
, kvm_get_msr
, 1);
1390 r
= msr_io(vcpu
, argp
, do_set_msr
, 0);
1392 case KVM_TPR_ACCESS_REPORTING
: {
1393 struct kvm_tpr_access_ctl tac
;
1396 if (copy_from_user(&tac
, argp
, sizeof tac
))
1398 r
= vcpu_ioctl_tpr_access_reporting(vcpu
, &tac
);
1402 if (copy_to_user(argp
, &tac
, sizeof tac
))
1407 case KVM_SET_VAPIC_ADDR
: {
1408 struct kvm_vapic_addr va
;
1411 if (!irqchip_in_kernel(vcpu
->kvm
))
1414 if (copy_from_user(&va
, argp
, sizeof va
))
1417 kvm_lapic_set_vapic_addr(vcpu
, va
.vapic_addr
);
1427 static int kvm_vm_ioctl_set_tss_addr(struct kvm
*kvm
, unsigned long addr
)
1431 if (addr
> (unsigned int)(-3 * PAGE_SIZE
))
1433 ret
= kvm_x86_ops
->set_tss_addr(kvm
, addr
);
1437 static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm
*kvm
,
1438 u32 kvm_nr_mmu_pages
)
1440 if (kvm_nr_mmu_pages
< KVM_MIN_ALLOC_MMU_PAGES
)
1443 down_write(&kvm
->slots_lock
);
1445 kvm_mmu_change_mmu_pages(kvm
, kvm_nr_mmu_pages
);
1446 kvm
->arch
.n_requested_mmu_pages
= kvm_nr_mmu_pages
;
1448 up_write(&kvm
->slots_lock
);
1452 static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm
*kvm
)
1454 return kvm
->arch
.n_alloc_mmu_pages
;
1457 gfn_t
unalias_gfn(struct kvm
*kvm
, gfn_t gfn
)
1460 struct kvm_mem_alias
*alias
;
1462 for (i
= 0; i
< kvm
->arch
.naliases
; ++i
) {
1463 alias
= &kvm
->arch
.aliases
[i
];
1464 if (gfn
>= alias
->base_gfn
1465 && gfn
< alias
->base_gfn
+ alias
->npages
)
1466 return alias
->target_gfn
+ gfn
- alias
->base_gfn
;
1472 * Set a new alias region. Aliases map a portion of physical memory into
1473 * another portion. This is useful for memory windows, for example the PC
1476 static int kvm_vm_ioctl_set_memory_alias(struct kvm
*kvm
,
1477 struct kvm_memory_alias
*alias
)
1480 struct kvm_mem_alias
*p
;
1483 /* General sanity checks */
1484 if (alias
->memory_size
& (PAGE_SIZE
- 1))
1486 if (alias
->guest_phys_addr
& (PAGE_SIZE
- 1))
1488 if (alias
->slot
>= KVM_ALIAS_SLOTS
)
1490 if (alias
->guest_phys_addr
+ alias
->memory_size
1491 < alias
->guest_phys_addr
)
1493 if (alias
->target_phys_addr
+ alias
->memory_size
1494 < alias
->target_phys_addr
)
1497 down_write(&kvm
->slots_lock
);
1499 p
= &kvm
->arch
.aliases
[alias
->slot
];
1500 p
->base_gfn
= alias
->guest_phys_addr
>> PAGE_SHIFT
;
1501 p
->npages
= alias
->memory_size
>> PAGE_SHIFT
;
1502 p
->target_gfn
= alias
->target_phys_addr
>> PAGE_SHIFT
;
1504 for (n
= KVM_ALIAS_SLOTS
; n
> 0; --n
)
1505 if (kvm
->arch
.aliases
[n
- 1].npages
)
1507 kvm
->arch
.naliases
= n
;
1509 kvm_mmu_zap_all(kvm
);
1511 up_write(&kvm
->slots_lock
);
1519 static int kvm_vm_ioctl_get_irqchip(struct kvm
*kvm
, struct kvm_irqchip
*chip
)
1524 switch (chip
->chip_id
) {
1525 case KVM_IRQCHIP_PIC_MASTER
:
1526 memcpy(&chip
->chip
.pic
,
1527 &pic_irqchip(kvm
)->pics
[0],
1528 sizeof(struct kvm_pic_state
));
1530 case KVM_IRQCHIP_PIC_SLAVE
:
1531 memcpy(&chip
->chip
.pic
,
1532 &pic_irqchip(kvm
)->pics
[1],
1533 sizeof(struct kvm_pic_state
));
1535 case KVM_IRQCHIP_IOAPIC
:
1536 memcpy(&chip
->chip
.ioapic
,
1537 ioapic_irqchip(kvm
),
1538 sizeof(struct kvm_ioapic_state
));
1547 static int kvm_vm_ioctl_set_irqchip(struct kvm
*kvm
, struct kvm_irqchip
*chip
)
1552 switch (chip
->chip_id
) {
1553 case KVM_IRQCHIP_PIC_MASTER
:
1554 memcpy(&pic_irqchip(kvm
)->pics
[0],
1556 sizeof(struct kvm_pic_state
));
1558 case KVM_IRQCHIP_PIC_SLAVE
:
1559 memcpy(&pic_irqchip(kvm
)->pics
[1],
1561 sizeof(struct kvm_pic_state
));
1563 case KVM_IRQCHIP_IOAPIC
:
1564 memcpy(ioapic_irqchip(kvm
),
1566 sizeof(struct kvm_ioapic_state
));
1572 kvm_pic_update_irq(pic_irqchip(kvm
));
1576 static int kvm_vm_ioctl_get_pit(struct kvm
*kvm
, struct kvm_pit_state
*ps
)
1580 memcpy(ps
, &kvm
->arch
.vpit
->pit_state
, sizeof(struct kvm_pit_state
));
1584 static int kvm_vm_ioctl_set_pit(struct kvm
*kvm
, struct kvm_pit_state
*ps
)
1588 memcpy(&kvm
->arch
.vpit
->pit_state
, ps
, sizeof(struct kvm_pit_state
));
1589 kvm_pit_load_count(kvm
, 0, ps
->channels
[0].count
);
1594 * Get (and clear) the dirty memory log for a memory slot.
1596 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
,
1597 struct kvm_dirty_log
*log
)
1601 struct kvm_memory_slot
*memslot
;
1604 down_write(&kvm
->slots_lock
);
1606 r
= kvm_get_dirty_log(kvm
, log
, &is_dirty
);
1610 /* If nothing is dirty, don't bother messing with page tables. */
1612 kvm_mmu_slot_remove_write_access(kvm
, log
->slot
);
1613 kvm_flush_remote_tlbs(kvm
);
1614 memslot
= &kvm
->memslots
[log
->slot
];
1615 n
= ALIGN(memslot
->npages
, BITS_PER_LONG
) / 8;
1616 memset(memslot
->dirty_bitmap
, 0, n
);
1620 up_write(&kvm
->slots_lock
);
1624 long kvm_arch_vm_ioctl(struct file
*filp
,
1625 unsigned int ioctl
, unsigned long arg
)
1627 struct kvm
*kvm
= filp
->private_data
;
1628 void __user
*argp
= (void __user
*)arg
;
1632 case KVM_SET_TSS_ADDR
:
1633 r
= kvm_vm_ioctl_set_tss_addr(kvm
, arg
);
1637 case KVM_SET_MEMORY_REGION
: {
1638 struct kvm_memory_region kvm_mem
;
1639 struct kvm_userspace_memory_region kvm_userspace_mem
;
1642 if (copy_from_user(&kvm_mem
, argp
, sizeof kvm_mem
))
1644 kvm_userspace_mem
.slot
= kvm_mem
.slot
;
1645 kvm_userspace_mem
.flags
= kvm_mem
.flags
;
1646 kvm_userspace_mem
.guest_phys_addr
= kvm_mem
.guest_phys_addr
;
1647 kvm_userspace_mem
.memory_size
= kvm_mem
.memory_size
;
1648 r
= kvm_vm_ioctl_set_memory_region(kvm
, &kvm_userspace_mem
, 0);
1653 case KVM_SET_NR_MMU_PAGES
:
1654 r
= kvm_vm_ioctl_set_nr_mmu_pages(kvm
, arg
);
1658 case KVM_GET_NR_MMU_PAGES
:
1659 r
= kvm_vm_ioctl_get_nr_mmu_pages(kvm
);
1661 case KVM_SET_MEMORY_ALIAS
: {
1662 struct kvm_memory_alias alias
;
1665 if (copy_from_user(&alias
, argp
, sizeof alias
))
1667 r
= kvm_vm_ioctl_set_memory_alias(kvm
, &alias
);
1672 case KVM_CREATE_IRQCHIP
:
1674 kvm
->arch
.vpic
= kvm_create_pic(kvm
);
1675 if (kvm
->arch
.vpic
) {
1676 r
= kvm_ioapic_init(kvm
);
1678 kfree(kvm
->arch
.vpic
);
1679 kvm
->arch
.vpic
= NULL
;
1685 case KVM_CREATE_PIT
:
1687 kvm
->arch
.vpit
= kvm_create_pit(kvm
);
1691 case KVM_IRQ_LINE
: {
1692 struct kvm_irq_level irq_event
;
1695 if (copy_from_user(&irq_event
, argp
, sizeof irq_event
))
1697 if (irqchip_in_kernel(kvm
)) {
1698 mutex_lock(&kvm
->lock
);
1699 if (irq_event
.irq
< 16)
1700 kvm_pic_set_irq(pic_irqchip(kvm
),
1703 kvm_ioapic_set_irq(kvm
->arch
.vioapic
,
1706 mutex_unlock(&kvm
->lock
);
1711 case KVM_GET_IRQCHIP
: {
1712 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1713 struct kvm_irqchip chip
;
1716 if (copy_from_user(&chip
, argp
, sizeof chip
))
1719 if (!irqchip_in_kernel(kvm
))
1721 r
= kvm_vm_ioctl_get_irqchip(kvm
, &chip
);
1725 if (copy_to_user(argp
, &chip
, sizeof chip
))
1730 case KVM_SET_IRQCHIP
: {
1731 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1732 struct kvm_irqchip chip
;
1735 if (copy_from_user(&chip
, argp
, sizeof chip
))
1738 if (!irqchip_in_kernel(kvm
))
1740 r
= kvm_vm_ioctl_set_irqchip(kvm
, &chip
);
1747 struct kvm_pit_state ps
;
1749 if (copy_from_user(&ps
, argp
, sizeof ps
))
1752 if (!kvm
->arch
.vpit
)
1754 r
= kvm_vm_ioctl_get_pit(kvm
, &ps
);
1758 if (copy_to_user(argp
, &ps
, sizeof ps
))
1764 struct kvm_pit_state ps
;
1766 if (copy_from_user(&ps
, argp
, sizeof ps
))
1769 if (!kvm
->arch
.vpit
)
1771 r
= kvm_vm_ioctl_set_pit(kvm
, &ps
);
1784 static void kvm_init_msr_list(void)
1789 for (i
= j
= 0; i
< ARRAY_SIZE(msrs_to_save
); i
++) {
1790 if (rdmsr_safe(msrs_to_save
[i
], &dummy
[0], &dummy
[1]) < 0)
1793 msrs_to_save
[j
] = msrs_to_save
[i
];
1796 num_msrs_to_save
= j
;
1800 * Only apic need an MMIO device hook, so shortcut now..
1802 static struct kvm_io_device
*vcpu_find_pervcpu_dev(struct kvm_vcpu
*vcpu
,
1803 gpa_t addr
, int len
,
1806 struct kvm_io_device
*dev
;
1808 if (vcpu
->arch
.apic
) {
1809 dev
= &vcpu
->arch
.apic
->dev
;
1810 if (dev
->in_range(dev
, addr
, len
, is_write
))
1817 static struct kvm_io_device
*vcpu_find_mmio_dev(struct kvm_vcpu
*vcpu
,
1818 gpa_t addr
, int len
,
1821 struct kvm_io_device
*dev
;
1823 dev
= vcpu_find_pervcpu_dev(vcpu
, addr
, len
, is_write
);
1825 dev
= kvm_io_bus_find_dev(&vcpu
->kvm
->mmio_bus
, addr
, len
,
1830 int emulator_read_std(unsigned long addr
,
1833 struct kvm_vcpu
*vcpu
)
1836 int r
= X86EMUL_CONTINUE
;
1839 gpa_t gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
1840 unsigned offset
= addr
& (PAGE_SIZE
-1);
1841 unsigned tocopy
= min(bytes
, (unsigned)PAGE_SIZE
- offset
);
1844 if (gpa
== UNMAPPED_GVA
) {
1845 r
= X86EMUL_PROPAGATE_FAULT
;
1848 ret
= kvm_read_guest(vcpu
->kvm
, gpa
, data
, tocopy
);
1850 r
= X86EMUL_UNHANDLEABLE
;
1861 EXPORT_SYMBOL_GPL(emulator_read_std
);
1863 static int emulator_read_emulated(unsigned long addr
,
1866 struct kvm_vcpu
*vcpu
)
1868 struct kvm_io_device
*mmio_dev
;
1871 if (vcpu
->mmio_read_completed
) {
1872 memcpy(val
, vcpu
->mmio_data
, bytes
);
1873 vcpu
->mmio_read_completed
= 0;
1874 return X86EMUL_CONTINUE
;
1877 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
1879 /* For APIC access vmexit */
1880 if ((gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
1883 if (emulator_read_std(addr
, val
, bytes
, vcpu
)
1884 == X86EMUL_CONTINUE
)
1885 return X86EMUL_CONTINUE
;
1886 if (gpa
== UNMAPPED_GVA
)
1887 return X86EMUL_PROPAGATE_FAULT
;
1891 * Is this MMIO handled locally?
1893 mutex_lock(&vcpu
->kvm
->lock
);
1894 mmio_dev
= vcpu_find_mmio_dev(vcpu
, gpa
, bytes
, 0);
1896 kvm_iodevice_read(mmio_dev
, gpa
, bytes
, val
);
1897 mutex_unlock(&vcpu
->kvm
->lock
);
1898 return X86EMUL_CONTINUE
;
1900 mutex_unlock(&vcpu
->kvm
->lock
);
1902 vcpu
->mmio_needed
= 1;
1903 vcpu
->mmio_phys_addr
= gpa
;
1904 vcpu
->mmio_size
= bytes
;
1905 vcpu
->mmio_is_write
= 0;
1907 return X86EMUL_UNHANDLEABLE
;
1910 int emulator_write_phys(struct kvm_vcpu
*vcpu
, gpa_t gpa
,
1911 const void *val
, int bytes
)
1915 ret
= kvm_write_guest(vcpu
->kvm
, gpa
, val
, bytes
);
1918 kvm_mmu_pte_write(vcpu
, gpa
, val
, bytes
);
1922 static int emulator_write_emulated_onepage(unsigned long addr
,
1925 struct kvm_vcpu
*vcpu
)
1927 struct kvm_io_device
*mmio_dev
;
1930 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
1932 if (gpa
== UNMAPPED_GVA
) {
1933 kvm_inject_page_fault(vcpu
, addr
, 2);
1934 return X86EMUL_PROPAGATE_FAULT
;
1937 /* For APIC access vmexit */
1938 if ((gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
1941 if (emulator_write_phys(vcpu
, gpa
, val
, bytes
))
1942 return X86EMUL_CONTINUE
;
1946 * Is this MMIO handled locally?
1948 mutex_lock(&vcpu
->kvm
->lock
);
1949 mmio_dev
= vcpu_find_mmio_dev(vcpu
, gpa
, bytes
, 1);
1951 kvm_iodevice_write(mmio_dev
, gpa
, bytes
, val
);
1952 mutex_unlock(&vcpu
->kvm
->lock
);
1953 return X86EMUL_CONTINUE
;
1955 mutex_unlock(&vcpu
->kvm
->lock
);
1957 vcpu
->mmio_needed
= 1;
1958 vcpu
->mmio_phys_addr
= gpa
;
1959 vcpu
->mmio_size
= bytes
;
1960 vcpu
->mmio_is_write
= 1;
1961 memcpy(vcpu
->mmio_data
, val
, bytes
);
1963 return X86EMUL_CONTINUE
;
1966 int emulator_write_emulated(unsigned long addr
,
1969 struct kvm_vcpu
*vcpu
)
1971 /* Crossing a page boundary? */
1972 if (((addr
+ bytes
- 1) ^ addr
) & PAGE_MASK
) {
1975 now
= -addr
& ~PAGE_MASK
;
1976 rc
= emulator_write_emulated_onepage(addr
, val
, now
, vcpu
);
1977 if (rc
!= X86EMUL_CONTINUE
)
1983 return emulator_write_emulated_onepage(addr
, val
, bytes
, vcpu
);
1985 EXPORT_SYMBOL_GPL(emulator_write_emulated
);
1987 static int emulator_cmpxchg_emulated(unsigned long addr
,
1991 struct kvm_vcpu
*vcpu
)
1993 static int reported
;
1997 printk(KERN_WARNING
"kvm: emulating exchange as write\n");
1999 #ifndef CONFIG_X86_64
2000 /* guests cmpxchg8b have to be emulated atomically */
2007 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
2009 if (gpa
== UNMAPPED_GVA
||
2010 (gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
2013 if (((gpa
+ bytes
- 1) & PAGE_MASK
) != (gpa
& PAGE_MASK
))
2018 down_read(¤t
->mm
->mmap_sem
);
2019 page
= gfn_to_page(vcpu
->kvm
, gpa
>> PAGE_SHIFT
);
2020 up_read(¤t
->mm
->mmap_sem
);
2022 kaddr
= kmap_atomic(page
, KM_USER0
);
2023 set_64bit((u64
*)(kaddr
+ offset_in_page(gpa
)), val
);
2024 kunmap_atomic(kaddr
, KM_USER0
);
2025 kvm_release_page_dirty(page
);
2030 return emulator_write_emulated(addr
, new, bytes
, vcpu
);
2033 static unsigned long get_segment_base(struct kvm_vcpu
*vcpu
, int seg
)
2035 return kvm_x86_ops
->get_segment_base(vcpu
, seg
);
2038 int emulate_invlpg(struct kvm_vcpu
*vcpu
, gva_t address
)
2040 return X86EMUL_CONTINUE
;
2043 int emulate_clts(struct kvm_vcpu
*vcpu
)
2045 KVMTRACE_0D(CLTS
, vcpu
, handler
);
2046 kvm_x86_ops
->set_cr0(vcpu
, vcpu
->arch
.cr0
& ~X86_CR0_TS
);
2047 return X86EMUL_CONTINUE
;
2050 int emulator_get_dr(struct x86_emulate_ctxt
*ctxt
, int dr
, unsigned long *dest
)
2052 struct kvm_vcpu
*vcpu
= ctxt
->vcpu
;
2056 *dest
= kvm_x86_ops
->get_dr(vcpu
, dr
);
2057 return X86EMUL_CONTINUE
;
2059 pr_unimpl(vcpu
, "%s: unexpected dr %u\n", __func__
, dr
);
2060 return X86EMUL_UNHANDLEABLE
;
2064 int emulator_set_dr(struct x86_emulate_ctxt
*ctxt
, int dr
, unsigned long value
)
2066 unsigned long mask
= (ctxt
->mode
== X86EMUL_MODE_PROT64
) ? ~0ULL : ~0U;
2069 kvm_x86_ops
->set_dr(ctxt
->vcpu
, dr
, value
& mask
, &exception
);
2071 /* FIXME: better handling */
2072 return X86EMUL_UNHANDLEABLE
;
2074 return X86EMUL_CONTINUE
;
2077 void kvm_report_emulation_failure(struct kvm_vcpu
*vcpu
, const char *context
)
2080 unsigned long rip
= vcpu
->arch
.rip
;
2081 unsigned long rip_linear
;
2083 if (!printk_ratelimit())
2086 rip_linear
= rip
+ get_segment_base(vcpu
, VCPU_SREG_CS
);
2088 emulator_read_std(rip_linear
, (void *)opcodes
, 4, vcpu
);
2090 printk(KERN_ERR
"emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
2091 context
, rip
, opcodes
[0], opcodes
[1], opcodes
[2], opcodes
[3]);
2093 EXPORT_SYMBOL_GPL(kvm_report_emulation_failure
);
2095 static struct x86_emulate_ops emulate_ops
= {
2096 .read_std
= emulator_read_std
,
2097 .read_emulated
= emulator_read_emulated
,
2098 .write_emulated
= emulator_write_emulated
,
2099 .cmpxchg_emulated
= emulator_cmpxchg_emulated
,
2102 int emulate_instruction(struct kvm_vcpu
*vcpu
,
2103 struct kvm_run
*run
,
2109 struct decode_cache
*c
;
2111 vcpu
->arch
.mmio_fault_cr2
= cr2
;
2112 kvm_x86_ops
->cache_regs(vcpu
);
2114 vcpu
->mmio_is_write
= 0;
2115 vcpu
->arch
.pio
.string
= 0;
2117 if (!(emulation_type
& EMULTYPE_NO_DECODE
)) {
2119 kvm_x86_ops
->get_cs_db_l_bits(vcpu
, &cs_db
, &cs_l
);
2121 vcpu
->arch
.emulate_ctxt
.vcpu
= vcpu
;
2122 vcpu
->arch
.emulate_ctxt
.eflags
= kvm_x86_ops
->get_rflags(vcpu
);
2123 vcpu
->arch
.emulate_ctxt
.mode
=
2124 (vcpu
->arch
.emulate_ctxt
.eflags
& X86_EFLAGS_VM
)
2125 ? X86EMUL_MODE_REAL
: cs_l
2126 ? X86EMUL_MODE_PROT64
: cs_db
2127 ? X86EMUL_MODE_PROT32
: X86EMUL_MODE_PROT16
;
2129 if (vcpu
->arch
.emulate_ctxt
.mode
== X86EMUL_MODE_PROT64
) {
2130 vcpu
->arch
.emulate_ctxt
.cs_base
= 0;
2131 vcpu
->arch
.emulate_ctxt
.ds_base
= 0;
2132 vcpu
->arch
.emulate_ctxt
.es_base
= 0;
2133 vcpu
->arch
.emulate_ctxt
.ss_base
= 0;
2135 vcpu
->arch
.emulate_ctxt
.cs_base
=
2136 get_segment_base(vcpu
, VCPU_SREG_CS
);
2137 vcpu
->arch
.emulate_ctxt
.ds_base
=
2138 get_segment_base(vcpu
, VCPU_SREG_DS
);
2139 vcpu
->arch
.emulate_ctxt
.es_base
=
2140 get_segment_base(vcpu
, VCPU_SREG_ES
);
2141 vcpu
->arch
.emulate_ctxt
.ss_base
=
2142 get_segment_base(vcpu
, VCPU_SREG_SS
);
2145 vcpu
->arch
.emulate_ctxt
.gs_base
=
2146 get_segment_base(vcpu
, VCPU_SREG_GS
);
2147 vcpu
->arch
.emulate_ctxt
.fs_base
=
2148 get_segment_base(vcpu
, VCPU_SREG_FS
);
2150 r
= x86_decode_insn(&vcpu
->arch
.emulate_ctxt
, &emulate_ops
);
2152 /* Reject the instructions other than VMCALL/VMMCALL when
2153 * try to emulate invalid opcode */
2154 c
= &vcpu
->arch
.emulate_ctxt
.decode
;
2155 if ((emulation_type
& EMULTYPE_TRAP_UD
) &&
2156 (!(c
->twobyte
&& c
->b
== 0x01 &&
2157 (c
->modrm_reg
== 0 || c
->modrm_reg
== 3) &&
2158 c
->modrm_mod
== 3 && c
->modrm_rm
== 1)))
2159 return EMULATE_FAIL
;
2161 ++vcpu
->stat
.insn_emulation
;
2163 ++vcpu
->stat
.insn_emulation_fail
;
2164 if (kvm_mmu_unprotect_page_virt(vcpu
, cr2
))
2165 return EMULATE_DONE
;
2166 return EMULATE_FAIL
;
2170 r
= x86_emulate_insn(&vcpu
->arch
.emulate_ctxt
, &emulate_ops
);
2172 if (vcpu
->arch
.pio
.string
)
2173 return EMULATE_DO_MMIO
;
2175 if ((r
|| vcpu
->mmio_is_write
) && run
) {
2176 run
->exit_reason
= KVM_EXIT_MMIO
;
2177 run
->mmio
.phys_addr
= vcpu
->mmio_phys_addr
;
2178 memcpy(run
->mmio
.data
, vcpu
->mmio_data
, 8);
2179 run
->mmio
.len
= vcpu
->mmio_size
;
2180 run
->mmio
.is_write
= vcpu
->mmio_is_write
;
2184 if (kvm_mmu_unprotect_page_virt(vcpu
, cr2
))
2185 return EMULATE_DONE
;
2186 if (!vcpu
->mmio_needed
) {
2187 kvm_report_emulation_failure(vcpu
, "mmio");
2188 return EMULATE_FAIL
;
2190 return EMULATE_DO_MMIO
;
2193 kvm_x86_ops
->decache_regs(vcpu
);
2194 kvm_x86_ops
->set_rflags(vcpu
, vcpu
->arch
.emulate_ctxt
.eflags
);
2196 if (vcpu
->mmio_is_write
) {
2197 vcpu
->mmio_needed
= 0;
2198 return EMULATE_DO_MMIO
;
2201 return EMULATE_DONE
;
2203 EXPORT_SYMBOL_GPL(emulate_instruction
);
2205 static void free_pio_guest_pages(struct kvm_vcpu
*vcpu
)
2209 for (i
= 0; i
< ARRAY_SIZE(vcpu
->arch
.pio
.guest_pages
); ++i
)
2210 if (vcpu
->arch
.pio
.guest_pages
[i
]) {
2211 kvm_release_page_dirty(vcpu
->arch
.pio
.guest_pages
[i
]);
2212 vcpu
->arch
.pio
.guest_pages
[i
] = NULL
;
2216 static int pio_copy_data(struct kvm_vcpu
*vcpu
)
2218 void *p
= vcpu
->arch
.pio_data
;
2221 int nr_pages
= vcpu
->arch
.pio
.guest_pages
[1] ? 2 : 1;
2223 q
= vmap(vcpu
->arch
.pio
.guest_pages
, nr_pages
, VM_READ
|VM_WRITE
,
2226 free_pio_guest_pages(vcpu
);
2229 q
+= vcpu
->arch
.pio
.guest_page_offset
;
2230 bytes
= vcpu
->arch
.pio
.size
* vcpu
->arch
.pio
.cur_count
;
2231 if (vcpu
->arch
.pio
.in
)
2232 memcpy(q
, p
, bytes
);
2234 memcpy(p
, q
, bytes
);
2235 q
-= vcpu
->arch
.pio
.guest_page_offset
;
2237 free_pio_guest_pages(vcpu
);
2241 int complete_pio(struct kvm_vcpu
*vcpu
)
2243 struct kvm_pio_request
*io
= &vcpu
->arch
.pio
;
2247 kvm_x86_ops
->cache_regs(vcpu
);
2251 memcpy(&vcpu
->arch
.regs
[VCPU_REGS_RAX
], vcpu
->arch
.pio_data
,
2255 r
= pio_copy_data(vcpu
);
2257 kvm_x86_ops
->cache_regs(vcpu
);
2264 delta
*= io
->cur_count
;
2266 * The size of the register should really depend on
2267 * current address size.
2269 vcpu
->arch
.regs
[VCPU_REGS_RCX
] -= delta
;
2275 vcpu
->arch
.regs
[VCPU_REGS_RDI
] += delta
;
2277 vcpu
->arch
.regs
[VCPU_REGS_RSI
] += delta
;
2280 kvm_x86_ops
->decache_regs(vcpu
);
2282 io
->count
-= io
->cur_count
;
2288 static void kernel_pio(struct kvm_io_device
*pio_dev
,
2289 struct kvm_vcpu
*vcpu
,
2292 /* TODO: String I/O for in kernel device */
2294 mutex_lock(&vcpu
->kvm
->lock
);
2295 if (vcpu
->arch
.pio
.in
)
2296 kvm_iodevice_read(pio_dev
, vcpu
->arch
.pio
.port
,
2297 vcpu
->arch
.pio
.size
,
2300 kvm_iodevice_write(pio_dev
, vcpu
->arch
.pio
.port
,
2301 vcpu
->arch
.pio
.size
,
2303 mutex_unlock(&vcpu
->kvm
->lock
);
2306 static void pio_string_write(struct kvm_io_device
*pio_dev
,
2307 struct kvm_vcpu
*vcpu
)
2309 struct kvm_pio_request
*io
= &vcpu
->arch
.pio
;
2310 void *pd
= vcpu
->arch
.pio_data
;
2313 mutex_lock(&vcpu
->kvm
->lock
);
2314 for (i
= 0; i
< io
->cur_count
; i
++) {
2315 kvm_iodevice_write(pio_dev
, io
->port
,
2320 mutex_unlock(&vcpu
->kvm
->lock
);
2323 static struct kvm_io_device
*vcpu_find_pio_dev(struct kvm_vcpu
*vcpu
,
2324 gpa_t addr
, int len
,
2327 return kvm_io_bus_find_dev(&vcpu
->kvm
->pio_bus
, addr
, len
, is_write
);
2330 int kvm_emulate_pio(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
, int in
,
2331 int size
, unsigned port
)
2333 struct kvm_io_device
*pio_dev
;
2335 vcpu
->run
->exit_reason
= KVM_EXIT_IO
;
2336 vcpu
->run
->io
.direction
= in
? KVM_EXIT_IO_IN
: KVM_EXIT_IO_OUT
;
2337 vcpu
->run
->io
.size
= vcpu
->arch
.pio
.size
= size
;
2338 vcpu
->run
->io
.data_offset
= KVM_PIO_PAGE_OFFSET
* PAGE_SIZE
;
2339 vcpu
->run
->io
.count
= vcpu
->arch
.pio
.count
= vcpu
->arch
.pio
.cur_count
= 1;
2340 vcpu
->run
->io
.port
= vcpu
->arch
.pio
.port
= port
;
2341 vcpu
->arch
.pio
.in
= in
;
2342 vcpu
->arch
.pio
.string
= 0;
2343 vcpu
->arch
.pio
.down
= 0;
2344 vcpu
->arch
.pio
.guest_page_offset
= 0;
2345 vcpu
->arch
.pio
.rep
= 0;
2347 if (vcpu
->run
->io
.direction
== KVM_EXIT_IO_IN
)
2348 KVMTRACE_2D(IO_READ
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2351 KVMTRACE_2D(IO_WRITE
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2354 kvm_x86_ops
->cache_regs(vcpu
);
2355 memcpy(vcpu
->arch
.pio_data
, &vcpu
->arch
.regs
[VCPU_REGS_RAX
], 4);
2357 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
2359 pio_dev
= vcpu_find_pio_dev(vcpu
, port
, size
, !in
);
2361 kernel_pio(pio_dev
, vcpu
, vcpu
->arch
.pio_data
);
2367 EXPORT_SYMBOL_GPL(kvm_emulate_pio
);
2369 int kvm_emulate_pio_string(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
, int in
,
2370 int size
, unsigned long count
, int down
,
2371 gva_t address
, int rep
, unsigned port
)
2373 unsigned now
, in_page
;
2377 struct kvm_io_device
*pio_dev
;
2379 vcpu
->run
->exit_reason
= KVM_EXIT_IO
;
2380 vcpu
->run
->io
.direction
= in
? KVM_EXIT_IO_IN
: KVM_EXIT_IO_OUT
;
2381 vcpu
->run
->io
.size
= vcpu
->arch
.pio
.size
= size
;
2382 vcpu
->run
->io
.data_offset
= KVM_PIO_PAGE_OFFSET
* PAGE_SIZE
;
2383 vcpu
->run
->io
.count
= vcpu
->arch
.pio
.count
= vcpu
->arch
.pio
.cur_count
= count
;
2384 vcpu
->run
->io
.port
= vcpu
->arch
.pio
.port
= port
;
2385 vcpu
->arch
.pio
.in
= in
;
2386 vcpu
->arch
.pio
.string
= 1;
2387 vcpu
->arch
.pio
.down
= down
;
2388 vcpu
->arch
.pio
.guest_page_offset
= offset_in_page(address
);
2389 vcpu
->arch
.pio
.rep
= rep
;
2391 if (vcpu
->run
->io
.direction
== KVM_EXIT_IO_IN
)
2392 KVMTRACE_2D(IO_READ
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2395 KVMTRACE_2D(IO_WRITE
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2399 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
2404 in_page
= PAGE_SIZE
- offset_in_page(address
);
2406 in_page
= offset_in_page(address
) + size
;
2407 now
= min(count
, (unsigned long)in_page
/ size
);
2410 * String I/O straddles page boundary. Pin two guest pages
2411 * so that we satisfy atomicity constraints. Do just one
2412 * transaction to avoid complexity.
2419 * String I/O in reverse. Yuck. Kill the guest, fix later.
2421 pr_unimpl(vcpu
, "guest string pio down\n");
2422 kvm_inject_gp(vcpu
, 0);
2425 vcpu
->run
->io
.count
= now
;
2426 vcpu
->arch
.pio
.cur_count
= now
;
2428 if (vcpu
->arch
.pio
.cur_count
== vcpu
->arch
.pio
.count
)
2429 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
2431 for (i
= 0; i
< nr_pages
; ++i
) {
2432 page
= gva_to_page(vcpu
, address
+ i
* PAGE_SIZE
);
2433 vcpu
->arch
.pio
.guest_pages
[i
] = page
;
2435 kvm_inject_gp(vcpu
, 0);
2436 free_pio_guest_pages(vcpu
);
2441 pio_dev
= vcpu_find_pio_dev(vcpu
, port
,
2442 vcpu
->arch
.pio
.cur_count
,
2443 !vcpu
->arch
.pio
.in
);
2444 if (!vcpu
->arch
.pio
.in
) {
2445 /* string PIO write */
2446 ret
= pio_copy_data(vcpu
);
2447 if (ret
>= 0 && pio_dev
) {
2448 pio_string_write(pio_dev
, vcpu
);
2450 if (vcpu
->arch
.pio
.count
== 0)
2454 pr_unimpl(vcpu
, "no string pio read support yet, "
2455 "port %x size %d count %ld\n",
2460 EXPORT_SYMBOL_GPL(kvm_emulate_pio_string
);
2462 int kvm_arch_init(void *opaque
)
2465 struct kvm_x86_ops
*ops
= (struct kvm_x86_ops
*)opaque
;
2468 printk(KERN_ERR
"kvm: already loaded the other module\n");
2473 if (!ops
->cpu_has_kvm_support()) {
2474 printk(KERN_ERR
"kvm: no hardware support\n");
2478 if (ops
->disabled_by_bios()) {
2479 printk(KERN_ERR
"kvm: disabled by bios\n");
2484 r
= kvm_mmu_module_init();
2488 kvm_init_msr_list();
2491 kvm_mmu_set_nonpresent_ptes(0ull, 0ull);
2492 kvm_mmu_set_base_ptes(PT_PRESENT_MASK
);
2493 kvm_mmu_set_mask_ptes(PT_USER_MASK
, PT_ACCESSED_MASK
,
2494 PT_DIRTY_MASK
, PT64_NX_MASK
, 0);
2501 void kvm_arch_exit(void)
2504 kvm_mmu_module_exit();
2507 int kvm_emulate_halt(struct kvm_vcpu
*vcpu
)
2509 ++vcpu
->stat
.halt_exits
;
2510 KVMTRACE_0D(HLT
, vcpu
, handler
);
2511 if (irqchip_in_kernel(vcpu
->kvm
)) {
2512 vcpu
->arch
.mp_state
= KVM_MP_STATE_HALTED
;
2513 up_read(&vcpu
->kvm
->slots_lock
);
2514 kvm_vcpu_block(vcpu
);
2515 down_read(&vcpu
->kvm
->slots_lock
);
2516 if (vcpu
->arch
.mp_state
!= KVM_MP_STATE_RUNNABLE
)
2520 vcpu
->run
->exit_reason
= KVM_EXIT_HLT
;
2524 EXPORT_SYMBOL_GPL(kvm_emulate_halt
);
2526 static inline gpa_t
hc_gpa(struct kvm_vcpu
*vcpu
, unsigned long a0
,
2529 if (is_long_mode(vcpu
))
2532 return a0
| ((gpa_t
)a1
<< 32);
2535 int kvm_emulate_hypercall(struct kvm_vcpu
*vcpu
)
2537 unsigned long nr
, a0
, a1
, a2
, a3
, ret
;
2540 kvm_x86_ops
->cache_regs(vcpu
);
2542 nr
= vcpu
->arch
.regs
[VCPU_REGS_RAX
];
2543 a0
= vcpu
->arch
.regs
[VCPU_REGS_RBX
];
2544 a1
= vcpu
->arch
.regs
[VCPU_REGS_RCX
];
2545 a2
= vcpu
->arch
.regs
[VCPU_REGS_RDX
];
2546 a3
= vcpu
->arch
.regs
[VCPU_REGS_RSI
];
2548 KVMTRACE_1D(VMMCALL
, vcpu
, (u32
)nr
, handler
);
2550 if (!is_long_mode(vcpu
)) {
2559 case KVM_HC_VAPIC_POLL_IRQ
:
2563 r
= kvm_pv_mmu_op(vcpu
, a0
, hc_gpa(vcpu
, a1
, a2
), &ret
);
2569 vcpu
->arch
.regs
[VCPU_REGS_RAX
] = ret
;
2570 kvm_x86_ops
->decache_regs(vcpu
);
2571 ++vcpu
->stat
.hypercalls
;
2574 EXPORT_SYMBOL_GPL(kvm_emulate_hypercall
);
2576 int kvm_fix_hypercall(struct kvm_vcpu
*vcpu
)
2578 char instruction
[3];
2583 * Blow out the MMU to ensure that no other VCPU has an active mapping
2584 * to ensure that the updated hypercall appears atomically across all
2587 kvm_mmu_zap_all(vcpu
->kvm
);
2589 kvm_x86_ops
->cache_regs(vcpu
);
2590 kvm_x86_ops
->patch_hypercall(vcpu
, instruction
);
2591 if (emulator_write_emulated(vcpu
->arch
.rip
, instruction
, 3, vcpu
)
2592 != X86EMUL_CONTINUE
)
2598 static u64
mk_cr_64(u64 curr_cr
, u32 new_val
)
2600 return (curr_cr
& ~((1ULL << 32) - 1)) | new_val
;
2603 void realmode_lgdt(struct kvm_vcpu
*vcpu
, u16 limit
, unsigned long base
)
2605 struct descriptor_table dt
= { limit
, base
};
2607 kvm_x86_ops
->set_gdt(vcpu
, &dt
);
2610 void realmode_lidt(struct kvm_vcpu
*vcpu
, u16 limit
, unsigned long base
)
2612 struct descriptor_table dt
= { limit
, base
};
2614 kvm_x86_ops
->set_idt(vcpu
, &dt
);
2617 void realmode_lmsw(struct kvm_vcpu
*vcpu
, unsigned long msw
,
2618 unsigned long *rflags
)
2620 kvm_lmsw(vcpu
, msw
);
2621 *rflags
= kvm_x86_ops
->get_rflags(vcpu
);
2624 unsigned long realmode_get_cr(struct kvm_vcpu
*vcpu
, int cr
)
2626 unsigned long value
;
2628 kvm_x86_ops
->decache_cr4_guest_bits(vcpu
);
2631 value
= vcpu
->arch
.cr0
;
2634 value
= vcpu
->arch
.cr2
;
2637 value
= vcpu
->arch
.cr3
;
2640 value
= vcpu
->arch
.cr4
;
2643 value
= kvm_get_cr8(vcpu
);
2646 vcpu_printf(vcpu
, "%s: unexpected cr %u\n", __func__
, cr
);
2649 KVMTRACE_3D(CR_READ
, vcpu
, (u32
)cr
, (u32
)value
,
2650 (u32
)((u64
)value
>> 32), handler
);
2655 void realmode_set_cr(struct kvm_vcpu
*vcpu
, int cr
, unsigned long val
,
2656 unsigned long *rflags
)
2658 KVMTRACE_3D(CR_WRITE
, vcpu
, (u32
)cr
, (u32
)val
,
2659 (u32
)((u64
)val
>> 32), handler
);
2663 kvm_set_cr0(vcpu
, mk_cr_64(vcpu
->arch
.cr0
, val
));
2664 *rflags
= kvm_x86_ops
->get_rflags(vcpu
);
2667 vcpu
->arch
.cr2
= val
;
2670 kvm_set_cr3(vcpu
, val
);
2673 kvm_set_cr4(vcpu
, mk_cr_64(vcpu
->arch
.cr4
, val
));
2676 kvm_set_cr8(vcpu
, val
& 0xfUL
);
2679 vcpu_printf(vcpu
, "%s: unexpected cr %u\n", __func__
, cr
);
2683 static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu
*vcpu
, int i
)
2685 struct kvm_cpuid_entry2
*e
= &vcpu
->arch
.cpuid_entries
[i
];
2686 int j
, nent
= vcpu
->arch
.cpuid_nent
;
2688 e
->flags
&= ~KVM_CPUID_FLAG_STATE_READ_NEXT
;
2689 /* when no next entry is found, the current entry[i] is reselected */
2690 for (j
= i
+ 1; j
== i
; j
= (j
+ 1) % nent
) {
2691 struct kvm_cpuid_entry2
*ej
= &vcpu
->arch
.cpuid_entries
[j
];
2692 if (ej
->function
== e
->function
) {
2693 ej
->flags
|= KVM_CPUID_FLAG_STATE_READ_NEXT
;
2697 return 0; /* silence gcc, even though control never reaches here */
2700 /* find an entry with matching function, matching index (if needed), and that
2701 * should be read next (if it's stateful) */
2702 static int is_matching_cpuid_entry(struct kvm_cpuid_entry2
*e
,
2703 u32 function
, u32 index
)
2705 if (e
->function
!= function
)
2707 if ((e
->flags
& KVM_CPUID_FLAG_SIGNIFCANT_INDEX
) && e
->index
!= index
)
2709 if ((e
->flags
& KVM_CPUID_FLAG_STATEFUL_FUNC
) &&
2710 !(e
->flags
& KVM_CPUID_FLAG_STATE_READ_NEXT
))
2715 void kvm_emulate_cpuid(struct kvm_vcpu
*vcpu
)
2718 u32 function
, index
;
2719 struct kvm_cpuid_entry2
*e
, *best
;
2721 kvm_x86_ops
->cache_regs(vcpu
);
2722 function
= vcpu
->arch
.regs
[VCPU_REGS_RAX
];
2723 index
= vcpu
->arch
.regs
[VCPU_REGS_RCX
];
2724 vcpu
->arch
.regs
[VCPU_REGS_RAX
] = 0;
2725 vcpu
->arch
.regs
[VCPU_REGS_RBX
] = 0;
2726 vcpu
->arch
.regs
[VCPU_REGS_RCX
] = 0;
2727 vcpu
->arch
.regs
[VCPU_REGS_RDX
] = 0;
2729 for (i
= 0; i
< vcpu
->arch
.cpuid_nent
; ++i
) {
2730 e
= &vcpu
->arch
.cpuid_entries
[i
];
2731 if (is_matching_cpuid_entry(e
, function
, index
)) {
2732 if (e
->flags
& KVM_CPUID_FLAG_STATEFUL_FUNC
)
2733 move_to_next_stateful_cpuid_entry(vcpu
, i
);
2738 * Both basic or both extended?
2740 if (((e
->function
^ function
) & 0x80000000) == 0)
2741 if (!best
|| e
->function
> best
->function
)
2745 vcpu
->arch
.regs
[VCPU_REGS_RAX
] = best
->eax
;
2746 vcpu
->arch
.regs
[VCPU_REGS_RBX
] = best
->ebx
;
2747 vcpu
->arch
.regs
[VCPU_REGS_RCX
] = best
->ecx
;
2748 vcpu
->arch
.regs
[VCPU_REGS_RDX
] = best
->edx
;
2750 kvm_x86_ops
->decache_regs(vcpu
);
2751 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
2752 KVMTRACE_5D(CPUID
, vcpu
, function
,
2753 (u32
)vcpu
->arch
.regs
[VCPU_REGS_RAX
],
2754 (u32
)vcpu
->arch
.regs
[VCPU_REGS_RBX
],
2755 (u32
)vcpu
->arch
.regs
[VCPU_REGS_RCX
],
2756 (u32
)vcpu
->arch
.regs
[VCPU_REGS_RDX
], handler
);
2758 EXPORT_SYMBOL_GPL(kvm_emulate_cpuid
);
2761 * Check if userspace requested an interrupt window, and that the
2762 * interrupt window is open.
2764 * No need to exit to userspace if we already have an interrupt queued.
2766 static int dm_request_for_irq_injection(struct kvm_vcpu
*vcpu
,
2767 struct kvm_run
*kvm_run
)
2769 return (!vcpu
->arch
.irq_summary
&&
2770 kvm_run
->request_interrupt_window
&&
2771 vcpu
->arch
.interrupt_window_open
&&
2772 (kvm_x86_ops
->get_rflags(vcpu
) & X86_EFLAGS_IF
));
2775 static void post_kvm_run_save(struct kvm_vcpu
*vcpu
,
2776 struct kvm_run
*kvm_run
)
2778 kvm_run
->if_flag
= (kvm_x86_ops
->get_rflags(vcpu
) & X86_EFLAGS_IF
) != 0;
2779 kvm_run
->cr8
= kvm_get_cr8(vcpu
);
2780 kvm_run
->apic_base
= kvm_get_apic_base(vcpu
);
2781 if (irqchip_in_kernel(vcpu
->kvm
))
2782 kvm_run
->ready_for_interrupt_injection
= 1;
2784 kvm_run
->ready_for_interrupt_injection
=
2785 (vcpu
->arch
.interrupt_window_open
&&
2786 vcpu
->arch
.irq_summary
== 0);
2789 static void vapic_enter(struct kvm_vcpu
*vcpu
)
2791 struct kvm_lapic
*apic
= vcpu
->arch
.apic
;
2794 if (!apic
|| !apic
->vapic_addr
)
2797 down_read(¤t
->mm
->mmap_sem
);
2798 page
= gfn_to_page(vcpu
->kvm
, apic
->vapic_addr
>> PAGE_SHIFT
);
2799 up_read(¤t
->mm
->mmap_sem
);
2801 vcpu
->arch
.apic
->vapic_page
= page
;
2804 static void vapic_exit(struct kvm_vcpu
*vcpu
)
2806 struct kvm_lapic
*apic
= vcpu
->arch
.apic
;
2808 if (!apic
|| !apic
->vapic_addr
)
2811 kvm_release_page_dirty(apic
->vapic_page
);
2812 mark_page_dirty(vcpu
->kvm
, apic
->vapic_addr
>> PAGE_SHIFT
);
2815 static int __vcpu_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
2819 if (unlikely(vcpu
->arch
.mp_state
== KVM_MP_STATE_SIPI_RECEIVED
)) {
2820 pr_debug("vcpu %d received sipi with vector # %x\n",
2821 vcpu
->vcpu_id
, vcpu
->arch
.sipi_vector
);
2822 kvm_lapic_reset(vcpu
);
2823 r
= kvm_x86_ops
->vcpu_reset(vcpu
);
2826 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
2829 down_read(&vcpu
->kvm
->slots_lock
);
2833 if (vcpu
->guest_debug
.enabled
)
2834 kvm_x86_ops
->guest_debug_pre(vcpu
);
2838 if (test_and_clear_bit(KVM_REQ_MMU_RELOAD
, &vcpu
->requests
))
2839 kvm_mmu_unload(vcpu
);
2841 r
= kvm_mmu_reload(vcpu
);
2845 if (vcpu
->requests
) {
2846 if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER
, &vcpu
->requests
))
2847 __kvm_migrate_timers(vcpu
);
2848 if (test_and_clear_bit(KVM_REQ_TLB_FLUSH
, &vcpu
->requests
))
2849 kvm_x86_ops
->tlb_flush(vcpu
);
2850 if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS
,
2852 kvm_run
->exit_reason
= KVM_EXIT_TPR_ACCESS
;
2856 if (test_and_clear_bit(KVM_REQ_TRIPLE_FAULT
, &vcpu
->requests
)) {
2857 kvm_run
->exit_reason
= KVM_EXIT_SHUTDOWN
;
2863 clear_bit(KVM_REQ_PENDING_TIMER
, &vcpu
->requests
);
2864 kvm_inject_pending_timer_irqs(vcpu
);
2868 kvm_x86_ops
->prepare_guest_switch(vcpu
);
2869 kvm_load_guest_fpu(vcpu
);
2871 local_irq_disable();
2873 if (vcpu
->requests
|| need_resched()) {
2880 if (signal_pending(current
)) {
2884 kvm_run
->exit_reason
= KVM_EXIT_INTR
;
2885 ++vcpu
->stat
.signal_exits
;
2889 vcpu
->guest_mode
= 1;
2891 * Make sure that guest_mode assignment won't happen after
2892 * testing the pending IRQ vector bitmap.
2896 if (vcpu
->arch
.exception
.pending
)
2897 __queue_exception(vcpu
);
2898 else if (irqchip_in_kernel(vcpu
->kvm
))
2899 kvm_x86_ops
->inject_pending_irq(vcpu
);
2901 kvm_x86_ops
->inject_pending_vectors(vcpu
, kvm_run
);
2903 kvm_lapic_sync_to_vapic(vcpu
);
2905 up_read(&vcpu
->kvm
->slots_lock
);
2910 KVMTRACE_0D(VMENTRY
, vcpu
, entryexit
);
2911 kvm_x86_ops
->run(vcpu
, kvm_run
);
2913 vcpu
->guest_mode
= 0;
2919 * We must have an instruction between local_irq_enable() and
2920 * kvm_guest_exit(), so the timer interrupt isn't delayed by
2921 * the interrupt shadow. The stat.exits increment will do nicely.
2922 * But we need to prevent reordering, hence this barrier():
2930 down_read(&vcpu
->kvm
->slots_lock
);
2933 * Profile KVM exit RIPs:
2935 if (unlikely(prof_on
== KVM_PROFILING
)) {
2936 kvm_x86_ops
->cache_regs(vcpu
);
2937 profile_hit(KVM_PROFILING
, (void *)vcpu
->arch
.rip
);
2940 if (vcpu
->arch
.exception
.pending
&& kvm_x86_ops
->exception_injected(vcpu
))
2941 vcpu
->arch
.exception
.pending
= false;
2943 kvm_lapic_sync_from_vapic(vcpu
);
2945 r
= kvm_x86_ops
->handle_exit(kvm_run
, vcpu
);
2948 if (dm_request_for_irq_injection(vcpu
, kvm_run
)) {
2950 kvm_run
->exit_reason
= KVM_EXIT_INTR
;
2951 ++vcpu
->stat
.request_irq_exits
;
2954 if (!need_resched())
2959 up_read(&vcpu
->kvm
->slots_lock
);
2962 down_read(&vcpu
->kvm
->slots_lock
);
2966 post_kvm_run_save(vcpu
, kvm_run
);
2968 down_read(&vcpu
->kvm
->slots_lock
);
2970 up_read(&vcpu
->kvm
->slots_lock
);
2975 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
2982 if (unlikely(vcpu
->arch
.mp_state
== KVM_MP_STATE_UNINITIALIZED
)) {
2983 kvm_vcpu_block(vcpu
);
2988 if (vcpu
->sigset_active
)
2989 sigprocmask(SIG_SETMASK
, &vcpu
->sigset
, &sigsaved
);
2991 /* re-sync apic's tpr */
2992 if (!irqchip_in_kernel(vcpu
->kvm
))
2993 kvm_set_cr8(vcpu
, kvm_run
->cr8
);
2995 if (vcpu
->arch
.pio
.cur_count
) {
2996 r
= complete_pio(vcpu
);
3000 #if CONFIG_HAS_IOMEM
3001 if (vcpu
->mmio_needed
) {
3002 memcpy(vcpu
->mmio_data
, kvm_run
->mmio
.data
, 8);
3003 vcpu
->mmio_read_completed
= 1;
3004 vcpu
->mmio_needed
= 0;
3006 down_read(&vcpu
->kvm
->slots_lock
);
3007 r
= emulate_instruction(vcpu
, kvm_run
,
3008 vcpu
->arch
.mmio_fault_cr2
, 0,
3009 EMULTYPE_NO_DECODE
);
3010 up_read(&vcpu
->kvm
->slots_lock
);
3011 if (r
== EMULATE_DO_MMIO
) {
3013 * Read-modify-write. Back to userspace.
3020 if (kvm_run
->exit_reason
== KVM_EXIT_HYPERCALL
) {
3021 kvm_x86_ops
->cache_regs(vcpu
);
3022 vcpu
->arch
.regs
[VCPU_REGS_RAX
] = kvm_run
->hypercall
.ret
;
3023 kvm_x86_ops
->decache_regs(vcpu
);
3026 r
= __vcpu_run(vcpu
, kvm_run
);
3029 if (vcpu
->sigset_active
)
3030 sigprocmask(SIG_SETMASK
, &sigsaved
, NULL
);
3036 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
)
3040 kvm_x86_ops
->cache_regs(vcpu
);
3042 regs
->rax
= vcpu
->arch
.regs
[VCPU_REGS_RAX
];
3043 regs
->rbx
= vcpu
->arch
.regs
[VCPU_REGS_RBX
];
3044 regs
->rcx
= vcpu
->arch
.regs
[VCPU_REGS_RCX
];
3045 regs
->rdx
= vcpu
->arch
.regs
[VCPU_REGS_RDX
];
3046 regs
->rsi
= vcpu
->arch
.regs
[VCPU_REGS_RSI
];
3047 regs
->rdi
= vcpu
->arch
.regs
[VCPU_REGS_RDI
];
3048 regs
->rsp
= vcpu
->arch
.regs
[VCPU_REGS_RSP
];
3049 regs
->rbp
= vcpu
->arch
.regs
[VCPU_REGS_RBP
];
3050 #ifdef CONFIG_X86_64
3051 regs
->r8
= vcpu
->arch
.regs
[VCPU_REGS_R8
];
3052 regs
->r9
= vcpu
->arch
.regs
[VCPU_REGS_R9
];
3053 regs
->r10
= vcpu
->arch
.regs
[VCPU_REGS_R10
];
3054 regs
->r11
= vcpu
->arch
.regs
[VCPU_REGS_R11
];
3055 regs
->r12
= vcpu
->arch
.regs
[VCPU_REGS_R12
];
3056 regs
->r13
= vcpu
->arch
.regs
[VCPU_REGS_R13
];
3057 regs
->r14
= vcpu
->arch
.regs
[VCPU_REGS_R14
];
3058 regs
->r15
= vcpu
->arch
.regs
[VCPU_REGS_R15
];
3061 regs
->rip
= vcpu
->arch
.rip
;
3062 regs
->rflags
= kvm_x86_ops
->get_rflags(vcpu
);
3065 * Don't leak debug flags in case they were set for guest debugging
3067 if (vcpu
->guest_debug
.enabled
&& vcpu
->guest_debug
.singlestep
)
3068 regs
->rflags
&= ~(X86_EFLAGS_TF
| X86_EFLAGS_RF
);
3075 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
)
3079 vcpu
->arch
.regs
[VCPU_REGS_RAX
] = regs
->rax
;
3080 vcpu
->arch
.regs
[VCPU_REGS_RBX
] = regs
->rbx
;
3081 vcpu
->arch
.regs
[VCPU_REGS_RCX
] = regs
->rcx
;
3082 vcpu
->arch
.regs
[VCPU_REGS_RDX
] = regs
->rdx
;
3083 vcpu
->arch
.regs
[VCPU_REGS_RSI
] = regs
->rsi
;
3084 vcpu
->arch
.regs
[VCPU_REGS_RDI
] = regs
->rdi
;
3085 vcpu
->arch
.regs
[VCPU_REGS_RSP
] = regs
->rsp
;
3086 vcpu
->arch
.regs
[VCPU_REGS_RBP
] = regs
->rbp
;
3087 #ifdef CONFIG_X86_64
3088 vcpu
->arch
.regs
[VCPU_REGS_R8
] = regs
->r8
;
3089 vcpu
->arch
.regs
[VCPU_REGS_R9
] = regs
->r9
;
3090 vcpu
->arch
.regs
[VCPU_REGS_R10
] = regs
->r10
;
3091 vcpu
->arch
.regs
[VCPU_REGS_R11
] = regs
->r11
;
3092 vcpu
->arch
.regs
[VCPU_REGS_R12
] = regs
->r12
;
3093 vcpu
->arch
.regs
[VCPU_REGS_R13
] = regs
->r13
;
3094 vcpu
->arch
.regs
[VCPU_REGS_R14
] = regs
->r14
;
3095 vcpu
->arch
.regs
[VCPU_REGS_R15
] = regs
->r15
;
3098 vcpu
->arch
.rip
= regs
->rip
;
3099 kvm_x86_ops
->set_rflags(vcpu
, regs
->rflags
);
3101 kvm_x86_ops
->decache_regs(vcpu
);
3103 vcpu
->arch
.exception
.pending
= false;
3110 void kvm_get_segment(struct kvm_vcpu
*vcpu
,
3111 struct kvm_segment
*var
, int seg
)
3113 kvm_x86_ops
->get_segment(vcpu
, var
, seg
);
3116 void kvm_get_cs_db_l_bits(struct kvm_vcpu
*vcpu
, int *db
, int *l
)
3118 struct kvm_segment cs
;
3120 kvm_get_segment(vcpu
, &cs
, VCPU_SREG_CS
);
3124 EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits
);
3126 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
3127 struct kvm_sregs
*sregs
)
3129 struct descriptor_table dt
;
3134 kvm_get_segment(vcpu
, &sregs
->cs
, VCPU_SREG_CS
);
3135 kvm_get_segment(vcpu
, &sregs
->ds
, VCPU_SREG_DS
);
3136 kvm_get_segment(vcpu
, &sregs
->es
, VCPU_SREG_ES
);
3137 kvm_get_segment(vcpu
, &sregs
->fs
, VCPU_SREG_FS
);
3138 kvm_get_segment(vcpu
, &sregs
->gs
, VCPU_SREG_GS
);
3139 kvm_get_segment(vcpu
, &sregs
->ss
, VCPU_SREG_SS
);
3141 kvm_get_segment(vcpu
, &sregs
->tr
, VCPU_SREG_TR
);
3142 kvm_get_segment(vcpu
, &sregs
->ldt
, VCPU_SREG_LDTR
);
3144 kvm_x86_ops
->get_idt(vcpu
, &dt
);
3145 sregs
->idt
.limit
= dt
.limit
;
3146 sregs
->idt
.base
= dt
.base
;
3147 kvm_x86_ops
->get_gdt(vcpu
, &dt
);
3148 sregs
->gdt
.limit
= dt
.limit
;
3149 sregs
->gdt
.base
= dt
.base
;
3151 kvm_x86_ops
->decache_cr4_guest_bits(vcpu
);
3152 sregs
->cr0
= vcpu
->arch
.cr0
;
3153 sregs
->cr2
= vcpu
->arch
.cr2
;
3154 sregs
->cr3
= vcpu
->arch
.cr3
;
3155 sregs
->cr4
= vcpu
->arch
.cr4
;
3156 sregs
->cr8
= kvm_get_cr8(vcpu
);
3157 sregs
->efer
= vcpu
->arch
.shadow_efer
;
3158 sregs
->apic_base
= kvm_get_apic_base(vcpu
);
3160 if (irqchip_in_kernel(vcpu
->kvm
)) {
3161 memset(sregs
->interrupt_bitmap
, 0,
3162 sizeof sregs
->interrupt_bitmap
);
3163 pending_vec
= kvm_x86_ops
->get_irq(vcpu
);
3164 if (pending_vec
>= 0)
3165 set_bit(pending_vec
,
3166 (unsigned long *)sregs
->interrupt_bitmap
);
3168 memcpy(sregs
->interrupt_bitmap
, vcpu
->arch
.irq_pending
,
3169 sizeof sregs
->interrupt_bitmap
);
3176 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
3177 struct kvm_mp_state
*mp_state
)
3180 mp_state
->mp_state
= vcpu
->arch
.mp_state
;
3185 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
3186 struct kvm_mp_state
*mp_state
)
3189 vcpu
->arch
.mp_state
= mp_state
->mp_state
;
3194 static void kvm_set_segment(struct kvm_vcpu
*vcpu
,
3195 struct kvm_segment
*var
, int seg
)
3197 kvm_x86_ops
->set_segment(vcpu
, var
, seg
);
3200 static void seg_desct_to_kvm_desct(struct desc_struct
*seg_desc
, u16 selector
,
3201 struct kvm_segment
*kvm_desct
)
3203 kvm_desct
->base
= seg_desc
->base0
;
3204 kvm_desct
->base
|= seg_desc
->base1
<< 16;
3205 kvm_desct
->base
|= seg_desc
->base2
<< 24;
3206 kvm_desct
->limit
= seg_desc
->limit0
;
3207 kvm_desct
->limit
|= seg_desc
->limit
<< 16;
3208 kvm_desct
->selector
= selector
;
3209 kvm_desct
->type
= seg_desc
->type
;
3210 kvm_desct
->present
= seg_desc
->p
;
3211 kvm_desct
->dpl
= seg_desc
->dpl
;
3212 kvm_desct
->db
= seg_desc
->d
;
3213 kvm_desct
->s
= seg_desc
->s
;
3214 kvm_desct
->l
= seg_desc
->l
;
3215 kvm_desct
->g
= seg_desc
->g
;
3216 kvm_desct
->avl
= seg_desc
->avl
;
3218 kvm_desct
->unusable
= 1;
3220 kvm_desct
->unusable
= 0;
3221 kvm_desct
->padding
= 0;
3224 static void get_segment_descritptor_dtable(struct kvm_vcpu
*vcpu
,
3226 struct descriptor_table
*dtable
)
3228 if (selector
& 1 << 2) {
3229 struct kvm_segment kvm_seg
;
3231 kvm_get_segment(vcpu
, &kvm_seg
, VCPU_SREG_LDTR
);
3233 if (kvm_seg
.unusable
)
3236 dtable
->limit
= kvm_seg
.limit
;
3237 dtable
->base
= kvm_seg
.base
;
3240 kvm_x86_ops
->get_gdt(vcpu
, dtable
);
3243 /* allowed just for 8 bytes segments */
3244 static int load_guest_segment_descriptor(struct kvm_vcpu
*vcpu
, u16 selector
,
3245 struct desc_struct
*seg_desc
)
3247 struct descriptor_table dtable
;
3248 u16 index
= selector
>> 3;
3250 get_segment_descritptor_dtable(vcpu
, selector
, &dtable
);
3252 if (dtable
.limit
< index
* 8 + 7) {
3253 kvm_queue_exception_e(vcpu
, GP_VECTOR
, selector
& 0xfffc);
3256 return kvm_read_guest(vcpu
->kvm
, dtable
.base
+ index
* 8, seg_desc
, 8);
3259 /* allowed just for 8 bytes segments */
3260 static int save_guest_segment_descriptor(struct kvm_vcpu
*vcpu
, u16 selector
,
3261 struct desc_struct
*seg_desc
)
3263 struct descriptor_table dtable
;
3264 u16 index
= selector
>> 3;
3266 get_segment_descritptor_dtable(vcpu
, selector
, &dtable
);
3268 if (dtable
.limit
< index
* 8 + 7)
3270 return kvm_write_guest(vcpu
->kvm
, dtable
.base
+ index
* 8, seg_desc
, 8);
3273 static u32
get_tss_base_addr(struct kvm_vcpu
*vcpu
,
3274 struct desc_struct
*seg_desc
)
3278 base_addr
= seg_desc
->base0
;
3279 base_addr
|= (seg_desc
->base1
<< 16);
3280 base_addr
|= (seg_desc
->base2
<< 24);
3285 static int load_tss_segment32(struct kvm_vcpu
*vcpu
,
3286 struct desc_struct
*seg_desc
,
3287 struct tss_segment_32
*tss
)
3291 base_addr
= get_tss_base_addr(vcpu
, seg_desc
);
3293 return kvm_read_guest(vcpu
->kvm
, base_addr
, tss
,
3294 sizeof(struct tss_segment_32
));
3297 static int save_tss_segment32(struct kvm_vcpu
*vcpu
,
3298 struct desc_struct
*seg_desc
,
3299 struct tss_segment_32
*tss
)
3303 base_addr
= get_tss_base_addr(vcpu
, seg_desc
);
3305 return kvm_write_guest(vcpu
->kvm
, base_addr
, tss
,
3306 sizeof(struct tss_segment_32
));
3309 static int load_tss_segment16(struct kvm_vcpu
*vcpu
,
3310 struct desc_struct
*seg_desc
,
3311 struct tss_segment_16
*tss
)
3315 base_addr
= get_tss_base_addr(vcpu
, seg_desc
);
3317 return kvm_read_guest(vcpu
->kvm
, base_addr
, tss
,
3318 sizeof(struct tss_segment_16
));
3321 static int save_tss_segment16(struct kvm_vcpu
*vcpu
,
3322 struct desc_struct
*seg_desc
,
3323 struct tss_segment_16
*tss
)
3327 base_addr
= get_tss_base_addr(vcpu
, seg_desc
);
3329 return kvm_write_guest(vcpu
->kvm
, base_addr
, tss
,
3330 sizeof(struct tss_segment_16
));
3333 static u16
get_segment_selector(struct kvm_vcpu
*vcpu
, int seg
)
3335 struct kvm_segment kvm_seg
;
3337 kvm_get_segment(vcpu
, &kvm_seg
, seg
);
3338 return kvm_seg
.selector
;
3341 static int load_segment_descriptor_to_kvm_desct(struct kvm_vcpu
*vcpu
,
3343 struct kvm_segment
*kvm_seg
)
3345 struct desc_struct seg_desc
;
3347 if (load_guest_segment_descriptor(vcpu
, selector
, &seg_desc
))
3349 seg_desct_to_kvm_desct(&seg_desc
, selector
, kvm_seg
);
3353 int kvm_load_segment_descriptor(struct kvm_vcpu
*vcpu
, u16 selector
,
3354 int type_bits
, int seg
)
3356 struct kvm_segment kvm_seg
;
3358 if (load_segment_descriptor_to_kvm_desct(vcpu
, selector
, &kvm_seg
))
3360 kvm_seg
.type
|= type_bits
;
3362 if (seg
!= VCPU_SREG_SS
&& seg
!= VCPU_SREG_CS
&&
3363 seg
!= VCPU_SREG_LDTR
)
3365 kvm_seg
.unusable
= 1;
3367 kvm_set_segment(vcpu
, &kvm_seg
, seg
);
3371 static void save_state_to_tss32(struct kvm_vcpu
*vcpu
,
3372 struct tss_segment_32
*tss
)
3374 tss
->cr3
= vcpu
->arch
.cr3
;
3375 tss
->eip
= vcpu
->arch
.rip
;
3376 tss
->eflags
= kvm_x86_ops
->get_rflags(vcpu
);
3377 tss
->eax
= vcpu
->arch
.regs
[VCPU_REGS_RAX
];
3378 tss
->ecx
= vcpu
->arch
.regs
[VCPU_REGS_RCX
];
3379 tss
->edx
= vcpu
->arch
.regs
[VCPU_REGS_RDX
];
3380 tss
->ebx
= vcpu
->arch
.regs
[VCPU_REGS_RBX
];
3381 tss
->esp
= vcpu
->arch
.regs
[VCPU_REGS_RSP
];
3382 tss
->ebp
= vcpu
->arch
.regs
[VCPU_REGS_RBP
];
3383 tss
->esi
= vcpu
->arch
.regs
[VCPU_REGS_RSI
];
3384 tss
->edi
= vcpu
->arch
.regs
[VCPU_REGS_RDI
];
3386 tss
->es
= get_segment_selector(vcpu
, VCPU_SREG_ES
);
3387 tss
->cs
= get_segment_selector(vcpu
, VCPU_SREG_CS
);
3388 tss
->ss
= get_segment_selector(vcpu
, VCPU_SREG_SS
);
3389 tss
->ds
= get_segment_selector(vcpu
, VCPU_SREG_DS
);
3390 tss
->fs
= get_segment_selector(vcpu
, VCPU_SREG_FS
);
3391 tss
->gs
= get_segment_selector(vcpu
, VCPU_SREG_GS
);
3392 tss
->ldt_selector
= get_segment_selector(vcpu
, VCPU_SREG_LDTR
);
3393 tss
->prev_task_link
= get_segment_selector(vcpu
, VCPU_SREG_TR
);
3396 static int load_state_from_tss32(struct kvm_vcpu
*vcpu
,
3397 struct tss_segment_32
*tss
)
3399 kvm_set_cr3(vcpu
, tss
->cr3
);
3401 vcpu
->arch
.rip
= tss
->eip
;
3402 kvm_x86_ops
->set_rflags(vcpu
, tss
->eflags
| 2);
3404 vcpu
->arch
.regs
[VCPU_REGS_RAX
] = tss
->eax
;
3405 vcpu
->arch
.regs
[VCPU_REGS_RCX
] = tss
->ecx
;
3406 vcpu
->arch
.regs
[VCPU_REGS_RDX
] = tss
->edx
;
3407 vcpu
->arch
.regs
[VCPU_REGS_RBX
] = tss
->ebx
;
3408 vcpu
->arch
.regs
[VCPU_REGS_RSP
] = tss
->esp
;
3409 vcpu
->arch
.regs
[VCPU_REGS_RBP
] = tss
->ebp
;
3410 vcpu
->arch
.regs
[VCPU_REGS_RSI
] = tss
->esi
;
3411 vcpu
->arch
.regs
[VCPU_REGS_RDI
] = tss
->edi
;
3413 if (kvm_load_segment_descriptor(vcpu
, tss
->ldt_selector
, 0, VCPU_SREG_LDTR
))
3416 if (kvm_load_segment_descriptor(vcpu
, tss
->es
, 1, VCPU_SREG_ES
))
3419 if (kvm_load_segment_descriptor(vcpu
, tss
->cs
, 9, VCPU_SREG_CS
))
3422 if (kvm_load_segment_descriptor(vcpu
, tss
->ss
, 1, VCPU_SREG_SS
))
3425 if (kvm_load_segment_descriptor(vcpu
, tss
->ds
, 1, VCPU_SREG_DS
))
3428 if (kvm_load_segment_descriptor(vcpu
, tss
->fs
, 1, VCPU_SREG_FS
))
3431 if (kvm_load_segment_descriptor(vcpu
, tss
->gs
, 1, VCPU_SREG_GS
))
3436 static void save_state_to_tss16(struct kvm_vcpu
*vcpu
,
3437 struct tss_segment_16
*tss
)
3439 tss
->ip
= vcpu
->arch
.rip
;
3440 tss
->flag
= kvm_x86_ops
->get_rflags(vcpu
);
3441 tss
->ax
= vcpu
->arch
.regs
[VCPU_REGS_RAX
];
3442 tss
->cx
= vcpu
->arch
.regs
[VCPU_REGS_RCX
];
3443 tss
->dx
= vcpu
->arch
.regs
[VCPU_REGS_RDX
];
3444 tss
->bx
= vcpu
->arch
.regs
[VCPU_REGS_RBX
];
3445 tss
->sp
= vcpu
->arch
.regs
[VCPU_REGS_RSP
];
3446 tss
->bp
= vcpu
->arch
.regs
[VCPU_REGS_RBP
];
3447 tss
->si
= vcpu
->arch
.regs
[VCPU_REGS_RSI
];
3448 tss
->di
= vcpu
->arch
.regs
[VCPU_REGS_RDI
];
3450 tss
->es
= get_segment_selector(vcpu
, VCPU_SREG_ES
);
3451 tss
->cs
= get_segment_selector(vcpu
, VCPU_SREG_CS
);
3452 tss
->ss
= get_segment_selector(vcpu
, VCPU_SREG_SS
);
3453 tss
->ds
= get_segment_selector(vcpu
, VCPU_SREG_DS
);
3454 tss
->ldt
= get_segment_selector(vcpu
, VCPU_SREG_LDTR
);
3455 tss
->prev_task_link
= get_segment_selector(vcpu
, VCPU_SREG_TR
);
3458 static int load_state_from_tss16(struct kvm_vcpu
*vcpu
,
3459 struct tss_segment_16
*tss
)
3461 vcpu
->arch
.rip
= tss
->ip
;
3462 kvm_x86_ops
->set_rflags(vcpu
, tss
->flag
| 2);
3463 vcpu
->arch
.regs
[VCPU_REGS_RAX
] = tss
->ax
;
3464 vcpu
->arch
.regs
[VCPU_REGS_RCX
] = tss
->cx
;
3465 vcpu
->arch
.regs
[VCPU_REGS_RDX
] = tss
->dx
;
3466 vcpu
->arch
.regs
[VCPU_REGS_RBX
] = tss
->bx
;
3467 vcpu
->arch
.regs
[VCPU_REGS_RSP
] = tss
->sp
;
3468 vcpu
->arch
.regs
[VCPU_REGS_RBP
] = tss
->bp
;
3469 vcpu
->arch
.regs
[VCPU_REGS_RSI
] = tss
->si
;
3470 vcpu
->arch
.regs
[VCPU_REGS_RDI
] = tss
->di
;
3472 if (kvm_load_segment_descriptor(vcpu
, tss
->ldt
, 0, VCPU_SREG_LDTR
))
3475 if (kvm_load_segment_descriptor(vcpu
, tss
->es
, 1, VCPU_SREG_ES
))
3478 if (kvm_load_segment_descriptor(vcpu
, tss
->cs
, 9, VCPU_SREG_CS
))
3481 if (kvm_load_segment_descriptor(vcpu
, tss
->ss
, 1, VCPU_SREG_SS
))
3484 if (kvm_load_segment_descriptor(vcpu
, tss
->ds
, 1, VCPU_SREG_DS
))
3489 static int kvm_task_switch_16(struct kvm_vcpu
*vcpu
, u16 tss_selector
,
3490 struct desc_struct
*cseg_desc
,
3491 struct desc_struct
*nseg_desc
)
3493 struct tss_segment_16 tss_segment_16
;
3496 if (load_tss_segment16(vcpu
, cseg_desc
, &tss_segment_16
))
3499 save_state_to_tss16(vcpu
, &tss_segment_16
);
3500 save_tss_segment16(vcpu
, cseg_desc
, &tss_segment_16
);
3502 if (load_tss_segment16(vcpu
, nseg_desc
, &tss_segment_16
))
3504 if (load_state_from_tss16(vcpu
, &tss_segment_16
))
3512 static int kvm_task_switch_32(struct kvm_vcpu
*vcpu
, u16 tss_selector
,
3513 struct desc_struct
*cseg_desc
,
3514 struct desc_struct
*nseg_desc
)
3516 struct tss_segment_32 tss_segment_32
;
3519 if (load_tss_segment32(vcpu
, cseg_desc
, &tss_segment_32
))
3522 save_state_to_tss32(vcpu
, &tss_segment_32
);
3523 save_tss_segment32(vcpu
, cseg_desc
, &tss_segment_32
);
3525 if (load_tss_segment32(vcpu
, nseg_desc
, &tss_segment_32
))
3527 if (load_state_from_tss32(vcpu
, &tss_segment_32
))
3535 int kvm_task_switch(struct kvm_vcpu
*vcpu
, u16 tss_selector
, int reason
)
3537 struct kvm_segment tr_seg
;
3538 struct desc_struct cseg_desc
;
3539 struct desc_struct nseg_desc
;
3542 kvm_get_segment(vcpu
, &tr_seg
, VCPU_SREG_TR
);
3544 if (load_guest_segment_descriptor(vcpu
, tss_selector
, &nseg_desc
))
3547 if (load_guest_segment_descriptor(vcpu
, tr_seg
.selector
, &cseg_desc
))
3551 if (reason
!= TASK_SWITCH_IRET
) {
3554 cpl
= kvm_x86_ops
->get_cpl(vcpu
);
3555 if ((tss_selector
& 3) > nseg_desc
.dpl
|| cpl
> nseg_desc
.dpl
) {
3556 kvm_queue_exception_e(vcpu
, GP_VECTOR
, 0);
3561 if (!nseg_desc
.p
|| (nseg_desc
.limit0
| nseg_desc
.limit
<< 16) < 0x67) {
3562 kvm_queue_exception_e(vcpu
, TS_VECTOR
, tss_selector
& 0xfffc);
3566 if (reason
== TASK_SWITCH_IRET
|| reason
== TASK_SWITCH_JMP
) {
3567 cseg_desc
.type
&= ~(1 << 1); //clear the B flag
3568 save_guest_segment_descriptor(vcpu
, tr_seg
.selector
,
3572 if (reason
== TASK_SWITCH_IRET
) {
3573 u32 eflags
= kvm_x86_ops
->get_rflags(vcpu
);
3574 kvm_x86_ops
->set_rflags(vcpu
, eflags
& ~X86_EFLAGS_NT
);
3577 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
3578 kvm_x86_ops
->cache_regs(vcpu
);
3580 if (nseg_desc
.type
& 8)
3581 ret
= kvm_task_switch_32(vcpu
, tss_selector
, &cseg_desc
,
3584 ret
= kvm_task_switch_16(vcpu
, tss_selector
, &cseg_desc
,
3587 if (reason
== TASK_SWITCH_CALL
|| reason
== TASK_SWITCH_GATE
) {
3588 u32 eflags
= kvm_x86_ops
->get_rflags(vcpu
);
3589 kvm_x86_ops
->set_rflags(vcpu
, eflags
| X86_EFLAGS_NT
);
3592 if (reason
!= TASK_SWITCH_IRET
) {
3593 nseg_desc
.type
|= (1 << 1);
3594 save_guest_segment_descriptor(vcpu
, tss_selector
,
3598 kvm_x86_ops
->set_cr0(vcpu
, vcpu
->arch
.cr0
| X86_CR0_TS
);
3599 seg_desct_to_kvm_desct(&nseg_desc
, tss_selector
, &tr_seg
);
3601 kvm_set_segment(vcpu
, &tr_seg
, VCPU_SREG_TR
);
3603 kvm_x86_ops
->decache_regs(vcpu
);
3606 EXPORT_SYMBOL_GPL(kvm_task_switch
);
3608 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
3609 struct kvm_sregs
*sregs
)
3611 int mmu_reset_needed
= 0;
3612 int i
, pending_vec
, max_bits
;
3613 struct descriptor_table dt
;
3617 dt
.limit
= sregs
->idt
.limit
;
3618 dt
.base
= sregs
->idt
.base
;
3619 kvm_x86_ops
->set_idt(vcpu
, &dt
);
3620 dt
.limit
= sregs
->gdt
.limit
;
3621 dt
.base
= sregs
->gdt
.base
;
3622 kvm_x86_ops
->set_gdt(vcpu
, &dt
);
3624 vcpu
->arch
.cr2
= sregs
->cr2
;
3625 mmu_reset_needed
|= vcpu
->arch
.cr3
!= sregs
->cr3
;
3626 vcpu
->arch
.cr3
= sregs
->cr3
;
3628 kvm_set_cr8(vcpu
, sregs
->cr8
);
3630 mmu_reset_needed
|= vcpu
->arch
.shadow_efer
!= sregs
->efer
;
3631 kvm_x86_ops
->set_efer(vcpu
, sregs
->efer
);
3632 kvm_set_apic_base(vcpu
, sregs
->apic_base
);
3634 kvm_x86_ops
->decache_cr4_guest_bits(vcpu
);
3636 mmu_reset_needed
|= vcpu
->arch
.cr0
!= sregs
->cr0
;
3637 kvm_x86_ops
->set_cr0(vcpu
, sregs
->cr0
);
3638 vcpu
->arch
.cr0
= sregs
->cr0
;
3640 mmu_reset_needed
|= vcpu
->arch
.cr4
!= sregs
->cr4
;
3641 kvm_x86_ops
->set_cr4(vcpu
, sregs
->cr4
);
3642 if (!is_long_mode(vcpu
) && is_pae(vcpu
))
3643 load_pdptrs(vcpu
, vcpu
->arch
.cr3
);
3645 if (mmu_reset_needed
)
3646 kvm_mmu_reset_context(vcpu
);
3648 if (!irqchip_in_kernel(vcpu
->kvm
)) {
3649 memcpy(vcpu
->arch
.irq_pending
, sregs
->interrupt_bitmap
,
3650 sizeof vcpu
->arch
.irq_pending
);
3651 vcpu
->arch
.irq_summary
= 0;
3652 for (i
= 0; i
< ARRAY_SIZE(vcpu
->arch
.irq_pending
); ++i
)
3653 if (vcpu
->arch
.irq_pending
[i
])
3654 __set_bit(i
, &vcpu
->arch
.irq_summary
);
3656 max_bits
= (sizeof sregs
->interrupt_bitmap
) << 3;
3657 pending_vec
= find_first_bit(
3658 (const unsigned long *)sregs
->interrupt_bitmap
,
3660 /* Only pending external irq is handled here */
3661 if (pending_vec
< max_bits
) {
3662 kvm_x86_ops
->set_irq(vcpu
, pending_vec
);
3663 pr_debug("Set back pending irq %d\n",
3668 kvm_set_segment(vcpu
, &sregs
->cs
, VCPU_SREG_CS
);
3669 kvm_set_segment(vcpu
, &sregs
->ds
, VCPU_SREG_DS
);
3670 kvm_set_segment(vcpu
, &sregs
->es
, VCPU_SREG_ES
);
3671 kvm_set_segment(vcpu
, &sregs
->fs
, VCPU_SREG_FS
);
3672 kvm_set_segment(vcpu
, &sregs
->gs
, VCPU_SREG_GS
);
3673 kvm_set_segment(vcpu
, &sregs
->ss
, VCPU_SREG_SS
);
3675 kvm_set_segment(vcpu
, &sregs
->tr
, VCPU_SREG_TR
);
3676 kvm_set_segment(vcpu
, &sregs
->ldt
, VCPU_SREG_LDTR
);
3683 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu
*vcpu
,
3684 struct kvm_debug_guest
*dbg
)
3690 r
= kvm_x86_ops
->set_guest_debug(vcpu
, dbg
);
3698 * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
3699 * we have asm/x86/processor.h
3710 u32 st_space
[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
3711 #ifdef CONFIG_X86_64
3712 u32 xmm_space
[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
3714 u32 xmm_space
[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
3719 * Translate a guest virtual address to a guest physical address.
3721 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
3722 struct kvm_translation
*tr
)
3724 unsigned long vaddr
= tr
->linear_address
;
3728 down_read(&vcpu
->kvm
->slots_lock
);
3729 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, vaddr
);
3730 up_read(&vcpu
->kvm
->slots_lock
);
3731 tr
->physical_address
= gpa
;
3732 tr
->valid
= gpa
!= UNMAPPED_GVA
;
3740 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
)
3742 struct fxsave
*fxsave
= (struct fxsave
*)&vcpu
->arch
.guest_fx_image
;
3746 memcpy(fpu
->fpr
, fxsave
->st_space
, 128);
3747 fpu
->fcw
= fxsave
->cwd
;
3748 fpu
->fsw
= fxsave
->swd
;
3749 fpu
->ftwx
= fxsave
->twd
;
3750 fpu
->last_opcode
= fxsave
->fop
;
3751 fpu
->last_ip
= fxsave
->rip
;
3752 fpu
->last_dp
= fxsave
->rdp
;
3753 memcpy(fpu
->xmm
, fxsave
->xmm_space
, sizeof fxsave
->xmm_space
);
3760 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
)
3762 struct fxsave
*fxsave
= (struct fxsave
*)&vcpu
->arch
.guest_fx_image
;
3766 memcpy(fxsave
->st_space
, fpu
->fpr
, 128);
3767 fxsave
->cwd
= fpu
->fcw
;
3768 fxsave
->swd
= fpu
->fsw
;
3769 fxsave
->twd
= fpu
->ftwx
;
3770 fxsave
->fop
= fpu
->last_opcode
;
3771 fxsave
->rip
= fpu
->last_ip
;
3772 fxsave
->rdp
= fpu
->last_dp
;
3773 memcpy(fxsave
->xmm_space
, fpu
->xmm
, sizeof fxsave
->xmm_space
);
3780 void fx_init(struct kvm_vcpu
*vcpu
)
3782 unsigned after_mxcsr_mask
;
3785 * Touch the fpu the first time in non atomic context as if
3786 * this is the first fpu instruction the exception handler
3787 * will fire before the instruction returns and it'll have to
3788 * allocate ram with GFP_KERNEL.
3791 fx_save(&vcpu
->arch
.host_fx_image
);
3793 /* Initialize guest FPU by resetting ours and saving into guest's */
3795 fx_save(&vcpu
->arch
.host_fx_image
);
3797 fx_save(&vcpu
->arch
.guest_fx_image
);
3798 fx_restore(&vcpu
->arch
.host_fx_image
);
3801 vcpu
->arch
.cr0
|= X86_CR0_ET
;
3802 after_mxcsr_mask
= offsetof(struct i387_fxsave_struct
, st_space
);
3803 vcpu
->arch
.guest_fx_image
.mxcsr
= 0x1f80;
3804 memset((void *)&vcpu
->arch
.guest_fx_image
+ after_mxcsr_mask
,
3805 0, sizeof(struct i387_fxsave_struct
) - after_mxcsr_mask
);
3807 EXPORT_SYMBOL_GPL(fx_init
);
3809 void kvm_load_guest_fpu(struct kvm_vcpu
*vcpu
)
3811 if (!vcpu
->fpu_active
|| vcpu
->guest_fpu_loaded
)
3814 vcpu
->guest_fpu_loaded
= 1;
3815 fx_save(&vcpu
->arch
.host_fx_image
);
3816 fx_restore(&vcpu
->arch
.guest_fx_image
);
3818 EXPORT_SYMBOL_GPL(kvm_load_guest_fpu
);
3820 void kvm_put_guest_fpu(struct kvm_vcpu
*vcpu
)
3822 if (!vcpu
->guest_fpu_loaded
)
3825 vcpu
->guest_fpu_loaded
= 0;
3826 fx_save(&vcpu
->arch
.guest_fx_image
);
3827 fx_restore(&vcpu
->arch
.host_fx_image
);
3828 ++vcpu
->stat
.fpu_reload
;
3830 EXPORT_SYMBOL_GPL(kvm_put_guest_fpu
);
3832 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
)
3834 kvm_x86_ops
->vcpu_free(vcpu
);
3837 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
,
3840 return kvm_x86_ops
->vcpu_create(kvm
, id
);
3843 int kvm_arch_vcpu_setup(struct kvm_vcpu
*vcpu
)
3847 /* We do fxsave: this must be aligned. */
3848 BUG_ON((unsigned long)&vcpu
->arch
.host_fx_image
& 0xF);
3851 r
= kvm_arch_vcpu_reset(vcpu
);
3853 r
= kvm_mmu_setup(vcpu
);
3860 kvm_x86_ops
->vcpu_free(vcpu
);
3864 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
)
3867 kvm_mmu_unload(vcpu
);
3870 kvm_x86_ops
->vcpu_free(vcpu
);
3873 int kvm_arch_vcpu_reset(struct kvm_vcpu
*vcpu
)
3875 return kvm_x86_ops
->vcpu_reset(vcpu
);
3878 void kvm_arch_hardware_enable(void *garbage
)
3880 kvm_x86_ops
->hardware_enable(garbage
);
3883 void kvm_arch_hardware_disable(void *garbage
)
3885 kvm_x86_ops
->hardware_disable(garbage
);
3888 int kvm_arch_hardware_setup(void)
3890 return kvm_x86_ops
->hardware_setup();
3893 void kvm_arch_hardware_unsetup(void)
3895 kvm_x86_ops
->hardware_unsetup();
3898 void kvm_arch_check_processor_compat(void *rtn
)
3900 kvm_x86_ops
->check_processor_compatibility(rtn
);
3903 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
)
3909 BUG_ON(vcpu
->kvm
== NULL
);
3912 vcpu
->arch
.mmu
.root_hpa
= INVALID_PAGE
;
3913 if (!irqchip_in_kernel(kvm
) || vcpu
->vcpu_id
== 0)
3914 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
3916 vcpu
->arch
.mp_state
= KVM_MP_STATE_UNINITIALIZED
;
3918 page
= alloc_page(GFP_KERNEL
| __GFP_ZERO
);
3923 vcpu
->arch
.pio_data
= page_address(page
);
3925 r
= kvm_mmu_create(vcpu
);
3927 goto fail_free_pio_data
;
3929 if (irqchip_in_kernel(kvm
)) {
3930 r
= kvm_create_lapic(vcpu
);
3932 goto fail_mmu_destroy
;
3938 kvm_mmu_destroy(vcpu
);
3940 free_page((unsigned long)vcpu
->arch
.pio_data
);
3945 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
)
3947 kvm_free_lapic(vcpu
);
3948 down_read(&vcpu
->kvm
->slots_lock
);
3949 kvm_mmu_destroy(vcpu
);
3950 up_read(&vcpu
->kvm
->slots_lock
);
3951 free_page((unsigned long)vcpu
->arch
.pio_data
);
3954 struct kvm
*kvm_arch_create_vm(void)
3956 struct kvm
*kvm
= kzalloc(sizeof(struct kvm
), GFP_KERNEL
);
3959 return ERR_PTR(-ENOMEM
);
3961 INIT_LIST_HEAD(&kvm
->arch
.active_mmu_pages
);
3966 static void kvm_unload_vcpu_mmu(struct kvm_vcpu
*vcpu
)
3969 kvm_mmu_unload(vcpu
);
3973 static void kvm_free_vcpus(struct kvm
*kvm
)
3978 * Unpin any mmu pages first.
3980 for (i
= 0; i
< KVM_MAX_VCPUS
; ++i
)
3982 kvm_unload_vcpu_mmu(kvm
->vcpus
[i
]);
3983 for (i
= 0; i
< KVM_MAX_VCPUS
; ++i
) {
3984 if (kvm
->vcpus
[i
]) {
3985 kvm_arch_vcpu_free(kvm
->vcpus
[i
]);
3986 kvm
->vcpus
[i
] = NULL
;
3992 void kvm_arch_destroy_vm(struct kvm
*kvm
)
3995 kfree(kvm
->arch
.vpic
);
3996 kfree(kvm
->arch
.vioapic
);
3997 kvm_free_vcpus(kvm
);
3998 kvm_free_physmem(kvm
);
3999 if (kvm
->arch
.apic_access_page
)
4000 put_page(kvm
->arch
.apic_access_page
);
4001 if (kvm
->arch
.ept_identity_pagetable
)
4002 put_page(kvm
->arch
.ept_identity_pagetable
);
4006 int kvm_arch_set_memory_region(struct kvm
*kvm
,
4007 struct kvm_userspace_memory_region
*mem
,
4008 struct kvm_memory_slot old
,
4011 int npages
= mem
->memory_size
>> PAGE_SHIFT
;
4012 struct kvm_memory_slot
*memslot
= &kvm
->memslots
[mem
->slot
];
4014 /*To keep backward compatibility with older userspace,
4015 *x86 needs to hanlde !user_alloc case.
4018 if (npages
&& !old
.rmap
) {
4019 down_write(¤t
->mm
->mmap_sem
);
4020 memslot
->userspace_addr
= do_mmap(NULL
, 0,
4022 PROT_READ
| PROT_WRITE
,
4023 MAP_SHARED
| MAP_ANONYMOUS
,
4025 up_write(¤t
->mm
->mmap_sem
);
4027 if (IS_ERR((void *)memslot
->userspace_addr
))
4028 return PTR_ERR((void *)memslot
->userspace_addr
);
4030 if (!old
.user_alloc
&& old
.rmap
) {
4033 down_write(¤t
->mm
->mmap_sem
);
4034 ret
= do_munmap(current
->mm
, old
.userspace_addr
,
4035 old
.npages
* PAGE_SIZE
);
4036 up_write(¤t
->mm
->mmap_sem
);
4039 "kvm_vm_ioctl_set_memory_region: "
4040 "failed to munmap memory\n");
4045 if (!kvm
->arch
.n_requested_mmu_pages
) {
4046 unsigned int nr_mmu_pages
= kvm_mmu_calculate_mmu_pages(kvm
);
4047 kvm_mmu_change_mmu_pages(kvm
, nr_mmu_pages
);
4050 kvm_mmu_slot_remove_write_access(kvm
, mem
->slot
);
4051 kvm_flush_remote_tlbs(kvm
);
4056 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
)
4058 return vcpu
->arch
.mp_state
== KVM_MP_STATE_RUNNABLE
4059 || vcpu
->arch
.mp_state
== KVM_MP_STATE_SIPI_RECEIVED
;
4062 static void vcpu_kick_intr(void *info
)
4065 struct kvm_vcpu
*vcpu
= (struct kvm_vcpu
*)info
;
4066 printk(KERN_DEBUG
"vcpu_kick_intr %p \n", vcpu
);
4070 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
)
4072 int ipi_pcpu
= vcpu
->cpu
;
4073 int cpu
= get_cpu();
4075 if (waitqueue_active(&vcpu
->wq
)) {
4076 wake_up_interruptible(&vcpu
->wq
);
4077 ++vcpu
->stat
.halt_wakeup
;
4080 * We may be called synchronously with irqs disabled in guest mode,
4081 * So need not to call smp_call_function_single() in that case.
4083 if (vcpu
->guest_mode
&& vcpu
->cpu
!= cpu
)
4084 smp_call_function_single(ipi_pcpu
, vcpu_kick_intr
, vcpu
, 0);