2 * Kernel-based Virtual Machine driver for Linux
4 * derived from drivers/kvm/kvm_main.c
6 * Copyright (C) 2006 Qumranet, Inc.
7 * Copyright (C) 2008 Qumranet, Inc.
8 * Copyright IBM Corporation, 2008
11 * Avi Kivity <avi@qumranet.com>
12 * Yaniv Kamay <yaniv@qumranet.com>
13 * Amit Shah <amit.shah@qumranet.com>
14 * Ben-Ami Yassour <benami@il.ibm.com>
16 * This work is licensed under the terms of the GNU GPL, version 2. See
17 * the COPYING file in the top-level directory.
21 #include <linux/kvm_host.h>
26 #include "kvm_cache_regs.h"
29 #include <linux/clocksource.h>
30 #include <linux/interrupt.h>
31 #include <linux/kvm.h>
33 #include <linux/vmalloc.h>
34 #include <linux/module.h>
35 #include <linux/mman.h>
36 #include <linux/highmem.h>
37 #include <linux/iommu.h>
38 #include <linux/intel-iommu.h>
39 #include <linux/cpufreq.h>
41 #include <asm/uaccess.h>
46 #define MAX_IO_MSRS 256
47 #define CR0_RESERVED_BITS \
48 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
49 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
50 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
51 #define CR4_RESERVED_BITS \
52 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
53 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \
54 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \
55 | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
57 #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
59 * - enable syscall per default because its emulated by KVM
60 * - enable LME and LMA per default on 64 bit KVM
63 static u64 __read_mostly efer_reserved_bits
= 0xfffffffffffffafeULL
;
65 static u64 __read_mostly efer_reserved_bits
= 0xfffffffffffffffeULL
;
68 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
69 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
71 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2
*cpuid
,
72 struct kvm_cpuid_entry2 __user
*entries
);
73 struct kvm_cpuid_entry2
*kvm_find_cpuid_entry(struct kvm_vcpu
*vcpu
,
74 u32 function
, u32 index
);
76 struct kvm_x86_ops
*kvm_x86_ops
;
77 EXPORT_SYMBOL_GPL(kvm_x86_ops
);
79 struct kvm_stats_debugfs_item debugfs_entries
[] = {
80 { "pf_fixed", VCPU_STAT(pf_fixed
) },
81 { "pf_guest", VCPU_STAT(pf_guest
) },
82 { "tlb_flush", VCPU_STAT(tlb_flush
) },
83 { "invlpg", VCPU_STAT(invlpg
) },
84 { "exits", VCPU_STAT(exits
) },
85 { "io_exits", VCPU_STAT(io_exits
) },
86 { "mmio_exits", VCPU_STAT(mmio_exits
) },
87 { "signal_exits", VCPU_STAT(signal_exits
) },
88 { "irq_window", VCPU_STAT(irq_window_exits
) },
89 { "nmi_window", VCPU_STAT(nmi_window_exits
) },
90 { "halt_exits", VCPU_STAT(halt_exits
) },
91 { "halt_wakeup", VCPU_STAT(halt_wakeup
) },
92 { "hypercalls", VCPU_STAT(hypercalls
) },
93 { "request_irq", VCPU_STAT(request_irq_exits
) },
94 { "irq_exits", VCPU_STAT(irq_exits
) },
95 { "host_state_reload", VCPU_STAT(host_state_reload
) },
96 { "efer_reload", VCPU_STAT(efer_reload
) },
97 { "fpu_reload", VCPU_STAT(fpu_reload
) },
98 { "insn_emulation", VCPU_STAT(insn_emulation
) },
99 { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail
) },
100 { "irq_injections", VCPU_STAT(irq_injections
) },
101 { "nmi_injections", VCPU_STAT(nmi_injections
) },
102 { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped
) },
103 { "mmu_pte_write", VM_STAT(mmu_pte_write
) },
104 { "mmu_pte_updated", VM_STAT(mmu_pte_updated
) },
105 { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped
) },
106 { "mmu_flooded", VM_STAT(mmu_flooded
) },
107 { "mmu_recycled", VM_STAT(mmu_recycled
) },
108 { "mmu_cache_miss", VM_STAT(mmu_cache_miss
) },
109 { "mmu_unsync", VM_STAT(mmu_unsync
) },
110 { "remote_tlb_flush", VM_STAT(remote_tlb_flush
) },
111 { "largepages", VM_STAT(lpages
) },
115 unsigned long segment_base(u16 selector
)
117 struct descriptor_table gdt
;
118 struct desc_struct
*d
;
119 unsigned long table_base
;
125 asm("sgdt %0" : "=m"(gdt
));
126 table_base
= gdt
.base
;
128 if (selector
& 4) { /* from ldt */
131 asm("sldt %0" : "=g"(ldt_selector
));
132 table_base
= segment_base(ldt_selector
);
134 d
= (struct desc_struct
*)(table_base
+ (selector
& ~7));
135 v
= d
->base0
| ((unsigned long)d
->base1
<< 16) |
136 ((unsigned long)d
->base2
<< 24);
138 if (d
->s
== 0 && (d
->type
== 2 || d
->type
== 9 || d
->type
== 11))
139 v
|= ((unsigned long)((struct ldttss_desc64
*)d
)->base3
) << 32;
143 EXPORT_SYMBOL_GPL(segment_base
);
145 u64
kvm_get_apic_base(struct kvm_vcpu
*vcpu
)
147 if (irqchip_in_kernel(vcpu
->kvm
))
148 return vcpu
->arch
.apic_base
;
150 return vcpu
->arch
.apic_base
;
152 EXPORT_SYMBOL_GPL(kvm_get_apic_base
);
154 void kvm_set_apic_base(struct kvm_vcpu
*vcpu
, u64 data
)
156 /* TODO: reserve bits check */
157 if (irqchip_in_kernel(vcpu
->kvm
))
158 kvm_lapic_set_base(vcpu
, data
);
160 vcpu
->arch
.apic_base
= data
;
162 EXPORT_SYMBOL_GPL(kvm_set_apic_base
);
164 void kvm_queue_exception(struct kvm_vcpu
*vcpu
, unsigned nr
)
166 WARN_ON(vcpu
->arch
.exception
.pending
);
167 vcpu
->arch
.exception
.pending
= true;
168 vcpu
->arch
.exception
.has_error_code
= false;
169 vcpu
->arch
.exception
.nr
= nr
;
171 EXPORT_SYMBOL_GPL(kvm_queue_exception
);
173 void kvm_inject_page_fault(struct kvm_vcpu
*vcpu
, unsigned long addr
,
176 ++vcpu
->stat
.pf_guest
;
178 if (vcpu
->arch
.exception
.pending
) {
179 if (vcpu
->arch
.exception
.nr
== PF_VECTOR
) {
180 printk(KERN_DEBUG
"kvm: inject_page_fault:"
181 " double fault 0x%lx\n", addr
);
182 vcpu
->arch
.exception
.nr
= DF_VECTOR
;
183 vcpu
->arch
.exception
.error_code
= 0;
184 } else if (vcpu
->arch
.exception
.nr
== DF_VECTOR
) {
185 /* triple fault -> shutdown */
186 set_bit(KVM_REQ_TRIPLE_FAULT
, &vcpu
->requests
);
190 vcpu
->arch
.cr2
= addr
;
191 kvm_queue_exception_e(vcpu
, PF_VECTOR
, error_code
);
194 void kvm_inject_nmi(struct kvm_vcpu
*vcpu
)
196 vcpu
->arch
.nmi_pending
= 1;
198 EXPORT_SYMBOL_GPL(kvm_inject_nmi
);
200 void kvm_queue_exception_e(struct kvm_vcpu
*vcpu
, unsigned nr
, u32 error_code
)
202 WARN_ON(vcpu
->arch
.exception
.pending
);
203 vcpu
->arch
.exception
.pending
= true;
204 vcpu
->arch
.exception
.has_error_code
= true;
205 vcpu
->arch
.exception
.nr
= nr
;
206 vcpu
->arch
.exception
.error_code
= error_code
;
208 EXPORT_SYMBOL_GPL(kvm_queue_exception_e
);
210 static void __queue_exception(struct kvm_vcpu
*vcpu
)
212 kvm_x86_ops
->queue_exception(vcpu
, vcpu
->arch
.exception
.nr
,
213 vcpu
->arch
.exception
.has_error_code
,
214 vcpu
->arch
.exception
.error_code
);
218 * Load the pae pdptrs. Return true is they are all valid.
220 int load_pdptrs(struct kvm_vcpu
*vcpu
, unsigned long cr3
)
222 gfn_t pdpt_gfn
= cr3
>> PAGE_SHIFT
;
223 unsigned offset
= ((cr3
& (PAGE_SIZE
-1)) >> 5) << 2;
226 u64 pdpte
[ARRAY_SIZE(vcpu
->arch
.pdptrs
)];
228 ret
= kvm_read_guest_page(vcpu
->kvm
, pdpt_gfn
, pdpte
,
229 offset
* sizeof(u64
), sizeof(pdpte
));
234 for (i
= 0; i
< ARRAY_SIZE(pdpte
); ++i
) {
235 if (is_present_pte(pdpte
[i
]) &&
236 (pdpte
[i
] & vcpu
->arch
.mmu
.rsvd_bits_mask
[0][2])) {
243 memcpy(vcpu
->arch
.pdptrs
, pdpte
, sizeof(vcpu
->arch
.pdptrs
));
248 EXPORT_SYMBOL_GPL(load_pdptrs
);
250 static bool pdptrs_changed(struct kvm_vcpu
*vcpu
)
252 u64 pdpte
[ARRAY_SIZE(vcpu
->arch
.pdptrs
)];
256 if (is_long_mode(vcpu
) || !is_pae(vcpu
))
259 r
= kvm_read_guest(vcpu
->kvm
, vcpu
->arch
.cr3
& ~31u, pdpte
, sizeof(pdpte
));
262 changed
= memcmp(pdpte
, vcpu
->arch
.pdptrs
, sizeof(pdpte
)) != 0;
268 void kvm_set_cr0(struct kvm_vcpu
*vcpu
, unsigned long cr0
)
270 if (cr0
& CR0_RESERVED_BITS
) {
271 printk(KERN_DEBUG
"set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
272 cr0
, vcpu
->arch
.cr0
);
273 kvm_inject_gp(vcpu
, 0);
277 if ((cr0
& X86_CR0_NW
) && !(cr0
& X86_CR0_CD
)) {
278 printk(KERN_DEBUG
"set_cr0: #GP, CD == 0 && NW == 1\n");
279 kvm_inject_gp(vcpu
, 0);
283 if ((cr0
& X86_CR0_PG
) && !(cr0
& X86_CR0_PE
)) {
284 printk(KERN_DEBUG
"set_cr0: #GP, set PG flag "
285 "and a clear PE flag\n");
286 kvm_inject_gp(vcpu
, 0);
290 if (!is_paging(vcpu
) && (cr0
& X86_CR0_PG
)) {
292 if ((vcpu
->arch
.shadow_efer
& EFER_LME
)) {
296 printk(KERN_DEBUG
"set_cr0: #GP, start paging "
297 "in long mode while PAE is disabled\n");
298 kvm_inject_gp(vcpu
, 0);
301 kvm_x86_ops
->get_cs_db_l_bits(vcpu
, &cs_db
, &cs_l
);
303 printk(KERN_DEBUG
"set_cr0: #GP, start paging "
304 "in long mode while CS.L == 1\n");
305 kvm_inject_gp(vcpu
, 0);
311 if (is_pae(vcpu
) && !load_pdptrs(vcpu
, vcpu
->arch
.cr3
)) {
312 printk(KERN_DEBUG
"set_cr0: #GP, pdptrs "
314 kvm_inject_gp(vcpu
, 0);
320 kvm_x86_ops
->set_cr0(vcpu
, cr0
);
321 vcpu
->arch
.cr0
= cr0
;
323 kvm_mmu_reset_context(vcpu
);
326 EXPORT_SYMBOL_GPL(kvm_set_cr0
);
328 void kvm_lmsw(struct kvm_vcpu
*vcpu
, unsigned long msw
)
330 kvm_set_cr0(vcpu
, (vcpu
->arch
.cr0
& ~0x0ful
) | (msw
& 0x0f));
331 KVMTRACE_1D(LMSW
, vcpu
,
332 (u32
)((vcpu
->arch
.cr0
& ~0x0ful
) | (msw
& 0x0f)),
335 EXPORT_SYMBOL_GPL(kvm_lmsw
);
337 void kvm_set_cr4(struct kvm_vcpu
*vcpu
, unsigned long cr4
)
339 unsigned long old_cr4
= vcpu
->arch
.cr4
;
340 unsigned long pdptr_bits
= X86_CR4_PGE
| X86_CR4_PSE
| X86_CR4_PAE
;
342 if (cr4
& CR4_RESERVED_BITS
) {
343 printk(KERN_DEBUG
"set_cr4: #GP, reserved bits\n");
344 kvm_inject_gp(vcpu
, 0);
348 if (is_long_mode(vcpu
)) {
349 if (!(cr4
& X86_CR4_PAE
)) {
350 printk(KERN_DEBUG
"set_cr4: #GP, clearing PAE while "
352 kvm_inject_gp(vcpu
, 0);
355 } else if (is_paging(vcpu
) && (cr4
& X86_CR4_PAE
)
356 && ((cr4
^ old_cr4
) & pdptr_bits
)
357 && !load_pdptrs(vcpu
, vcpu
->arch
.cr3
)) {
358 printk(KERN_DEBUG
"set_cr4: #GP, pdptrs reserved bits\n");
359 kvm_inject_gp(vcpu
, 0);
363 if (cr4
& X86_CR4_VMXE
) {
364 printk(KERN_DEBUG
"set_cr4: #GP, setting VMXE\n");
365 kvm_inject_gp(vcpu
, 0);
368 kvm_x86_ops
->set_cr4(vcpu
, cr4
);
369 vcpu
->arch
.cr4
= cr4
;
370 vcpu
->arch
.mmu
.base_role
.cr4_pge
= (cr4
& X86_CR4_PGE
) && !tdp_enabled
;
371 kvm_mmu_reset_context(vcpu
);
373 EXPORT_SYMBOL_GPL(kvm_set_cr4
);
375 void kvm_set_cr3(struct kvm_vcpu
*vcpu
, unsigned long cr3
)
377 if (cr3
== vcpu
->arch
.cr3
&& !pdptrs_changed(vcpu
)) {
378 kvm_mmu_sync_roots(vcpu
);
379 kvm_mmu_flush_tlb(vcpu
);
383 if (is_long_mode(vcpu
)) {
384 if (cr3
& CR3_L_MODE_RESERVED_BITS
) {
385 printk(KERN_DEBUG
"set_cr3: #GP, reserved bits\n");
386 kvm_inject_gp(vcpu
, 0);
391 if (cr3
& CR3_PAE_RESERVED_BITS
) {
393 "set_cr3: #GP, reserved bits\n");
394 kvm_inject_gp(vcpu
, 0);
397 if (is_paging(vcpu
) && !load_pdptrs(vcpu
, cr3
)) {
398 printk(KERN_DEBUG
"set_cr3: #GP, pdptrs "
400 kvm_inject_gp(vcpu
, 0);
405 * We don't check reserved bits in nonpae mode, because
406 * this isn't enforced, and VMware depends on this.
411 * Does the new cr3 value map to physical memory? (Note, we
412 * catch an invalid cr3 even in real-mode, because it would
413 * cause trouble later on when we turn on paging anyway.)
415 * A real CPU would silently accept an invalid cr3 and would
416 * attempt to use it - with largely undefined (and often hard
417 * to debug) behavior on the guest side.
419 if (unlikely(!gfn_to_memslot(vcpu
->kvm
, cr3
>> PAGE_SHIFT
)))
420 kvm_inject_gp(vcpu
, 0);
422 vcpu
->arch
.cr3
= cr3
;
423 vcpu
->arch
.mmu
.new_cr3(vcpu
);
426 EXPORT_SYMBOL_GPL(kvm_set_cr3
);
428 void kvm_set_cr8(struct kvm_vcpu
*vcpu
, unsigned long cr8
)
430 if (cr8
& CR8_RESERVED_BITS
) {
431 printk(KERN_DEBUG
"set_cr8: #GP, reserved bits 0x%lx\n", cr8
);
432 kvm_inject_gp(vcpu
, 0);
435 if (irqchip_in_kernel(vcpu
->kvm
))
436 kvm_lapic_set_tpr(vcpu
, cr8
);
438 vcpu
->arch
.cr8
= cr8
;
440 EXPORT_SYMBOL_GPL(kvm_set_cr8
);
442 unsigned long kvm_get_cr8(struct kvm_vcpu
*vcpu
)
444 if (irqchip_in_kernel(vcpu
->kvm
))
445 return kvm_lapic_get_cr8(vcpu
);
447 return vcpu
->arch
.cr8
;
449 EXPORT_SYMBOL_GPL(kvm_get_cr8
);
451 static inline u32
bit(int bitno
)
453 return 1 << (bitno
& 31);
457 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
458 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
460 * This list is modified at module load time to reflect the
461 * capabilities of the host cpu.
463 static u32 msrs_to_save
[] = {
464 MSR_IA32_SYSENTER_CS
, MSR_IA32_SYSENTER_ESP
, MSR_IA32_SYSENTER_EIP
,
467 MSR_CSTAR
, MSR_KERNEL_GS_BASE
, MSR_SYSCALL_MASK
, MSR_LSTAR
,
469 MSR_IA32_TIME_STAMP_COUNTER
, MSR_KVM_SYSTEM_TIME
, MSR_KVM_WALL_CLOCK
,
470 MSR_IA32_PERF_STATUS
, MSR_IA32_CR_PAT
, MSR_VM_HSAVE_PA
473 static unsigned num_msrs_to_save
;
475 static u32 emulated_msrs
[] = {
476 MSR_IA32_MISC_ENABLE
,
479 static void set_efer(struct kvm_vcpu
*vcpu
, u64 efer
)
481 if (efer
& efer_reserved_bits
) {
482 printk(KERN_DEBUG
"set_efer: 0x%llx #GP, reserved bits\n",
484 kvm_inject_gp(vcpu
, 0);
489 && (vcpu
->arch
.shadow_efer
& EFER_LME
) != (efer
& EFER_LME
)) {
490 printk(KERN_DEBUG
"set_efer: #GP, change LME while paging\n");
491 kvm_inject_gp(vcpu
, 0);
495 if (efer
& EFER_FFXSR
) {
496 struct kvm_cpuid_entry2
*feat
;
498 feat
= kvm_find_cpuid_entry(vcpu
, 0x80000001, 0);
499 if (!feat
|| !(feat
->edx
& bit(X86_FEATURE_FXSR_OPT
))) {
500 printk(KERN_DEBUG
"set_efer: #GP, enable FFXSR w/o CPUID capability\n");
501 kvm_inject_gp(vcpu
, 0);
506 if (efer
& EFER_SVME
) {
507 struct kvm_cpuid_entry2
*feat
;
509 feat
= kvm_find_cpuid_entry(vcpu
, 0x80000001, 0);
510 if (!feat
|| !(feat
->ecx
& bit(X86_FEATURE_SVM
))) {
511 printk(KERN_DEBUG
"set_efer: #GP, enable SVM w/o SVM\n");
512 kvm_inject_gp(vcpu
, 0);
517 kvm_x86_ops
->set_efer(vcpu
, efer
);
520 efer
|= vcpu
->arch
.shadow_efer
& EFER_LMA
;
522 vcpu
->arch
.shadow_efer
= efer
;
524 vcpu
->arch
.mmu
.base_role
.nxe
= (efer
& EFER_NX
) && !tdp_enabled
;
525 kvm_mmu_reset_context(vcpu
);
528 void kvm_enable_efer_bits(u64 mask
)
530 efer_reserved_bits
&= ~mask
;
532 EXPORT_SYMBOL_GPL(kvm_enable_efer_bits
);
536 * Writes msr value into into the appropriate "register".
537 * Returns 0 on success, non-0 otherwise.
538 * Assumes vcpu_load() was already called.
540 int kvm_set_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64 data
)
542 return kvm_x86_ops
->set_msr(vcpu
, msr_index
, data
);
546 * Adapt set_msr() to msr_io()'s calling convention
548 static int do_set_msr(struct kvm_vcpu
*vcpu
, unsigned index
, u64
*data
)
550 return kvm_set_msr(vcpu
, index
, *data
);
553 static void kvm_write_wall_clock(struct kvm
*kvm
, gpa_t wall_clock
)
556 struct pvclock_wall_clock wc
;
557 struct timespec now
, sys
, boot
;
564 kvm_write_guest(kvm
, wall_clock
, &version
, sizeof(version
));
567 * The guest calculates current wall clock time by adding
568 * system time (updated by kvm_write_guest_time below) to the
569 * wall clock specified here. guest system time equals host
570 * system time for us, thus we must fill in host boot time here.
572 now
= current_kernel_time();
574 boot
= ns_to_timespec(timespec_to_ns(&now
) - timespec_to_ns(&sys
));
576 wc
.sec
= boot
.tv_sec
;
577 wc
.nsec
= boot
.tv_nsec
;
578 wc
.version
= version
;
580 kvm_write_guest(kvm
, wall_clock
, &wc
, sizeof(wc
));
583 kvm_write_guest(kvm
, wall_clock
, &version
, sizeof(version
));
586 static uint32_t div_frac(uint32_t dividend
, uint32_t divisor
)
588 uint32_t quotient
, remainder
;
590 /* Don't try to replace with do_div(), this one calculates
591 * "(dividend << 32) / divisor" */
593 : "=a" (quotient
), "=d" (remainder
)
594 : "0" (0), "1" (dividend
), "r" (divisor
) );
598 static void kvm_set_time_scale(uint32_t tsc_khz
, struct pvclock_vcpu_time_info
*hv_clock
)
600 uint64_t nsecs
= 1000000000LL;
605 tps64
= tsc_khz
* 1000LL;
606 while (tps64
> nsecs
*2) {
611 tps32
= (uint32_t)tps64
;
612 while (tps32
<= (uint32_t)nsecs
) {
617 hv_clock
->tsc_shift
= shift
;
618 hv_clock
->tsc_to_system_mul
= div_frac(nsecs
, tps32
);
620 pr_debug("%s: tsc_khz %u, tsc_shift %d, tsc_mul %u\n",
621 __func__
, tsc_khz
, hv_clock
->tsc_shift
,
622 hv_clock
->tsc_to_system_mul
);
625 static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz
);
627 static void kvm_write_guest_time(struct kvm_vcpu
*v
)
631 struct kvm_vcpu_arch
*vcpu
= &v
->arch
;
633 unsigned long this_tsc_khz
;
635 if ((!vcpu
->time_page
))
638 this_tsc_khz
= get_cpu_var(cpu_tsc_khz
);
639 if (unlikely(vcpu
->hv_clock_tsc_khz
!= this_tsc_khz
)) {
640 kvm_set_time_scale(this_tsc_khz
, &vcpu
->hv_clock
);
641 vcpu
->hv_clock_tsc_khz
= this_tsc_khz
;
643 put_cpu_var(cpu_tsc_khz
);
645 /* Keep irq disabled to prevent changes to the clock */
646 local_irq_save(flags
);
647 kvm_get_msr(v
, MSR_IA32_TIME_STAMP_COUNTER
,
648 &vcpu
->hv_clock
.tsc_timestamp
);
650 local_irq_restore(flags
);
652 /* With all the info we got, fill in the values */
654 vcpu
->hv_clock
.system_time
= ts
.tv_nsec
+
655 (NSEC_PER_SEC
* (u64
)ts
.tv_sec
);
657 * The interface expects us to write an even number signaling that the
658 * update is finished. Since the guest won't see the intermediate
659 * state, we just increase by 2 at the end.
661 vcpu
->hv_clock
.version
+= 2;
663 shared_kaddr
= kmap_atomic(vcpu
->time_page
, KM_USER0
);
665 memcpy(shared_kaddr
+ vcpu
->time_offset
, &vcpu
->hv_clock
,
666 sizeof(vcpu
->hv_clock
));
668 kunmap_atomic(shared_kaddr
, KM_USER0
);
670 mark_page_dirty(v
->kvm
, vcpu
->time
>> PAGE_SHIFT
);
673 static int kvm_request_guest_time_update(struct kvm_vcpu
*v
)
675 struct kvm_vcpu_arch
*vcpu
= &v
->arch
;
677 if (!vcpu
->time_page
)
679 set_bit(KVM_REQ_KVMCLOCK_UPDATE
, &v
->requests
);
683 static bool msr_mtrr_valid(unsigned msr
)
686 case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR
- 1:
687 case MSR_MTRRfix64K_00000
:
688 case MSR_MTRRfix16K_80000
:
689 case MSR_MTRRfix16K_A0000
:
690 case MSR_MTRRfix4K_C0000
:
691 case MSR_MTRRfix4K_C8000
:
692 case MSR_MTRRfix4K_D0000
:
693 case MSR_MTRRfix4K_D8000
:
694 case MSR_MTRRfix4K_E0000
:
695 case MSR_MTRRfix4K_E8000
:
696 case MSR_MTRRfix4K_F0000
:
697 case MSR_MTRRfix4K_F8000
:
698 case MSR_MTRRdefType
:
699 case MSR_IA32_CR_PAT
:
707 static bool valid_pat_type(unsigned t
)
709 return t
< 8 && (1 << t
) & 0xf3; /* 0, 1, 4, 5, 6, 7 */
712 static bool valid_mtrr_type(unsigned t
)
714 return t
< 8 && (1 << t
) & 0x73; /* 0, 1, 4, 5, 6 */
717 static bool mtrr_valid(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
721 if (!msr_mtrr_valid(msr
))
724 if (msr
== MSR_IA32_CR_PAT
) {
725 for (i
= 0; i
< 8; i
++)
726 if (!valid_pat_type((data
>> (i
* 8)) & 0xff))
729 } else if (msr
== MSR_MTRRdefType
) {
732 return valid_mtrr_type(data
& 0xff);
733 } else if (msr
>= MSR_MTRRfix64K_00000
&& msr
<= MSR_MTRRfix4K_F8000
) {
734 for (i
= 0; i
< 8 ; i
++)
735 if (!valid_mtrr_type((data
>> (i
* 8)) & 0xff))
741 return valid_mtrr_type(data
& 0xff);
744 static int set_msr_mtrr(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
746 u64
*p
= (u64
*)&vcpu
->arch
.mtrr_state
.fixed_ranges
;
748 if (!mtrr_valid(vcpu
, msr
, data
))
751 if (msr
== MSR_MTRRdefType
) {
752 vcpu
->arch
.mtrr_state
.def_type
= data
;
753 vcpu
->arch
.mtrr_state
.enabled
= (data
& 0xc00) >> 10;
754 } else if (msr
== MSR_MTRRfix64K_00000
)
756 else if (msr
== MSR_MTRRfix16K_80000
|| msr
== MSR_MTRRfix16K_A0000
)
757 p
[1 + msr
- MSR_MTRRfix16K_80000
] = data
;
758 else if (msr
>= MSR_MTRRfix4K_C0000
&& msr
<= MSR_MTRRfix4K_F8000
)
759 p
[3 + msr
- MSR_MTRRfix4K_C0000
] = data
;
760 else if (msr
== MSR_IA32_CR_PAT
)
761 vcpu
->arch
.pat
= data
;
762 else { /* Variable MTRRs */
763 int idx
, is_mtrr_mask
;
766 idx
= (msr
- 0x200) / 2;
767 is_mtrr_mask
= msr
- 0x200 - 2 * idx
;
770 (u64
*)&vcpu
->arch
.mtrr_state
.var_ranges
[idx
].base_lo
;
773 (u64
*)&vcpu
->arch
.mtrr_state
.var_ranges
[idx
].mask_lo
;
777 kvm_mmu_reset_context(vcpu
);
781 int kvm_set_msr_common(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
785 set_efer(vcpu
, data
);
787 case MSR_IA32_MC0_STATUS
:
788 pr_unimpl(vcpu
, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n",
791 case MSR_IA32_MCG_STATUS
:
792 pr_unimpl(vcpu
, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n",
795 case MSR_IA32_MCG_CTL
:
796 pr_unimpl(vcpu
, "%s: MSR_IA32_MCG_CTL 0x%llx, nop\n",
799 case MSR_IA32_DEBUGCTLMSR
:
801 /* We support the non-activated case already */
803 } else if (data
& ~(DEBUGCTLMSR_LBR
| DEBUGCTLMSR_BTF
)) {
804 /* Values other than LBR and BTF are vendor-specific,
805 thus reserved and should throw a #GP */
808 pr_unimpl(vcpu
, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n",
811 case MSR_IA32_UCODE_REV
:
812 case MSR_IA32_UCODE_WRITE
:
813 case MSR_VM_HSAVE_PA
:
815 case 0x200 ... 0x2ff:
816 return set_msr_mtrr(vcpu
, msr
, data
);
817 case MSR_IA32_APICBASE
:
818 kvm_set_apic_base(vcpu
, data
);
820 case MSR_IA32_MISC_ENABLE
:
821 vcpu
->arch
.ia32_misc_enable_msr
= data
;
823 case MSR_KVM_WALL_CLOCK
:
824 vcpu
->kvm
->arch
.wall_clock
= data
;
825 kvm_write_wall_clock(vcpu
->kvm
, data
);
827 case MSR_KVM_SYSTEM_TIME
: {
828 if (vcpu
->arch
.time_page
) {
829 kvm_release_page_dirty(vcpu
->arch
.time_page
);
830 vcpu
->arch
.time_page
= NULL
;
833 vcpu
->arch
.time
= data
;
835 /* we verify if the enable bit is set... */
839 /* ...but clean it before doing the actual write */
840 vcpu
->arch
.time_offset
= data
& ~(PAGE_MASK
| 1);
842 vcpu
->arch
.time_page
=
843 gfn_to_page(vcpu
->kvm
, data
>> PAGE_SHIFT
);
845 if (is_error_page(vcpu
->arch
.time_page
)) {
846 kvm_release_page_clean(vcpu
->arch
.time_page
);
847 vcpu
->arch
.time_page
= NULL
;
850 kvm_request_guest_time_update(vcpu
);
854 pr_unimpl(vcpu
, "unhandled wrmsr: 0x%x data %llx\n", msr
, data
);
859 EXPORT_SYMBOL_GPL(kvm_set_msr_common
);
863 * Reads an msr value (of 'msr_index') into 'pdata'.
864 * Returns 0 on success, non-0 otherwise.
865 * Assumes vcpu_load() was already called.
867 int kvm_get_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64
*pdata
)
869 return kvm_x86_ops
->get_msr(vcpu
, msr_index
, pdata
);
872 static int get_msr_mtrr(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
)
874 u64
*p
= (u64
*)&vcpu
->arch
.mtrr_state
.fixed_ranges
;
876 if (!msr_mtrr_valid(msr
))
879 if (msr
== MSR_MTRRdefType
)
880 *pdata
= vcpu
->arch
.mtrr_state
.def_type
+
881 (vcpu
->arch
.mtrr_state
.enabled
<< 10);
882 else if (msr
== MSR_MTRRfix64K_00000
)
884 else if (msr
== MSR_MTRRfix16K_80000
|| msr
== MSR_MTRRfix16K_A0000
)
885 *pdata
= p
[1 + msr
- MSR_MTRRfix16K_80000
];
886 else if (msr
>= MSR_MTRRfix4K_C0000
&& msr
<= MSR_MTRRfix4K_F8000
)
887 *pdata
= p
[3 + msr
- MSR_MTRRfix4K_C0000
];
888 else if (msr
== MSR_IA32_CR_PAT
)
889 *pdata
= vcpu
->arch
.pat
;
890 else { /* Variable MTRRs */
891 int idx
, is_mtrr_mask
;
894 idx
= (msr
- 0x200) / 2;
895 is_mtrr_mask
= msr
- 0x200 - 2 * idx
;
898 (u64
*)&vcpu
->arch
.mtrr_state
.var_ranges
[idx
].base_lo
;
901 (u64
*)&vcpu
->arch
.mtrr_state
.var_ranges
[idx
].mask_lo
;
908 int kvm_get_msr_common(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
)
913 case 0xc0010010: /* SYSCFG */
914 case 0xc0010015: /* HWCR */
915 case MSR_IA32_PLATFORM_ID
:
916 case MSR_IA32_P5_MC_ADDR
:
917 case MSR_IA32_P5_MC_TYPE
:
918 case MSR_IA32_MC0_CTL
:
919 case MSR_IA32_MCG_STATUS
:
920 case MSR_IA32_MCG_CAP
:
921 case MSR_IA32_MCG_CTL
:
922 case MSR_IA32_MC0_MISC
:
923 case MSR_IA32_MC0_MISC
+4:
924 case MSR_IA32_MC0_MISC
+8:
925 case MSR_IA32_MC0_MISC
+12:
926 case MSR_IA32_MC0_MISC
+16:
927 case MSR_IA32_MC0_MISC
+20:
928 case MSR_IA32_UCODE_REV
:
929 case MSR_IA32_EBL_CR_POWERON
:
930 case MSR_IA32_DEBUGCTLMSR
:
931 case MSR_IA32_LASTBRANCHFROMIP
:
932 case MSR_IA32_LASTBRANCHTOIP
:
933 case MSR_IA32_LASTINTFROMIP
:
934 case MSR_IA32_LASTINTTOIP
:
935 case MSR_VM_HSAVE_PA
:
936 case MSR_P6_EVNTSEL0
:
937 case MSR_P6_EVNTSEL1
:
938 case MSR_K7_EVNTSEL0
:
942 data
= 0x500 | KVM_NR_VAR_MTRR
;
944 case 0x200 ... 0x2ff:
945 return get_msr_mtrr(vcpu
, msr
, pdata
);
946 case 0xcd: /* fsb frequency */
949 case MSR_IA32_APICBASE
:
950 data
= kvm_get_apic_base(vcpu
);
952 case MSR_IA32_MISC_ENABLE
:
953 data
= vcpu
->arch
.ia32_misc_enable_msr
;
955 case MSR_IA32_PERF_STATUS
:
956 /* TSC increment by tick */
959 data
|= (((uint64_t)4ULL) << 40);
962 data
= vcpu
->arch
.shadow_efer
;
964 case MSR_KVM_WALL_CLOCK
:
965 data
= vcpu
->kvm
->arch
.wall_clock
;
967 case MSR_KVM_SYSTEM_TIME
:
968 data
= vcpu
->arch
.time
;
971 pr_unimpl(vcpu
, "unhandled rdmsr: 0x%x\n", msr
);
977 EXPORT_SYMBOL_GPL(kvm_get_msr_common
);
980 * Read or write a bunch of msrs. All parameters are kernel addresses.
982 * @return number of msrs set successfully.
984 static int __msr_io(struct kvm_vcpu
*vcpu
, struct kvm_msrs
*msrs
,
985 struct kvm_msr_entry
*entries
,
986 int (*do_msr
)(struct kvm_vcpu
*vcpu
,
987 unsigned index
, u64
*data
))
993 down_read(&vcpu
->kvm
->slots_lock
);
994 for (i
= 0; i
< msrs
->nmsrs
; ++i
)
995 if (do_msr(vcpu
, entries
[i
].index
, &entries
[i
].data
))
997 up_read(&vcpu
->kvm
->slots_lock
);
1005 * Read or write a bunch of msrs. Parameters are user addresses.
1007 * @return number of msrs set successfully.
1009 static int msr_io(struct kvm_vcpu
*vcpu
, struct kvm_msrs __user
*user_msrs
,
1010 int (*do_msr
)(struct kvm_vcpu
*vcpu
,
1011 unsigned index
, u64
*data
),
1014 struct kvm_msrs msrs
;
1015 struct kvm_msr_entry
*entries
;
1020 if (copy_from_user(&msrs
, user_msrs
, sizeof msrs
))
1024 if (msrs
.nmsrs
>= MAX_IO_MSRS
)
1028 size
= sizeof(struct kvm_msr_entry
) * msrs
.nmsrs
;
1029 entries
= vmalloc(size
);
1034 if (copy_from_user(entries
, user_msrs
->entries
, size
))
1037 r
= n
= __msr_io(vcpu
, &msrs
, entries
, do_msr
);
1042 if (writeback
&& copy_to_user(user_msrs
->entries
, entries
, size
))
1053 int kvm_dev_ioctl_check_extension(long ext
)
1058 case KVM_CAP_IRQCHIP
:
1060 case KVM_CAP_MMU_SHADOW_CACHE_CONTROL
:
1061 case KVM_CAP_SET_TSS_ADDR
:
1062 case KVM_CAP_EXT_CPUID
:
1063 case KVM_CAP_CLOCKSOURCE
:
1065 case KVM_CAP_NOP_IO_DELAY
:
1066 case KVM_CAP_MP_STATE
:
1067 case KVM_CAP_SYNC_MMU
:
1068 case KVM_CAP_REINJECT_CONTROL
:
1069 case KVM_CAP_IRQ_INJECT_STATUS
:
1070 case KVM_CAP_ASSIGN_DEV_IRQ
:
1073 case KVM_CAP_COALESCED_MMIO
:
1074 r
= KVM_COALESCED_MMIO_PAGE_OFFSET
;
1077 r
= !kvm_x86_ops
->cpu_has_accelerated_tpr();
1079 case KVM_CAP_NR_VCPUS
:
1082 case KVM_CAP_NR_MEMSLOTS
:
1083 r
= KVM_MEMORY_SLOTS
;
1085 case KVM_CAP_PV_MMU
:
1099 long kvm_arch_dev_ioctl(struct file
*filp
,
1100 unsigned int ioctl
, unsigned long arg
)
1102 void __user
*argp
= (void __user
*)arg
;
1106 case KVM_GET_MSR_INDEX_LIST
: {
1107 struct kvm_msr_list __user
*user_msr_list
= argp
;
1108 struct kvm_msr_list msr_list
;
1112 if (copy_from_user(&msr_list
, user_msr_list
, sizeof msr_list
))
1115 msr_list
.nmsrs
= num_msrs_to_save
+ ARRAY_SIZE(emulated_msrs
);
1116 if (copy_to_user(user_msr_list
, &msr_list
, sizeof msr_list
))
1119 if (n
< msr_list
.nmsrs
)
1122 if (copy_to_user(user_msr_list
->indices
, &msrs_to_save
,
1123 num_msrs_to_save
* sizeof(u32
)))
1125 if (copy_to_user(user_msr_list
->indices
+ num_msrs_to_save
,
1127 ARRAY_SIZE(emulated_msrs
) * sizeof(u32
)))
1132 case KVM_GET_SUPPORTED_CPUID
: {
1133 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
1134 struct kvm_cpuid2 cpuid
;
1137 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1139 r
= kvm_dev_ioctl_get_supported_cpuid(&cpuid
,
1140 cpuid_arg
->entries
);
1145 if (copy_to_user(cpuid_arg
, &cpuid
, sizeof cpuid
))
1157 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
)
1159 kvm_x86_ops
->vcpu_load(vcpu
, cpu
);
1160 kvm_request_guest_time_update(vcpu
);
1163 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
)
1165 kvm_x86_ops
->vcpu_put(vcpu
);
1166 kvm_put_guest_fpu(vcpu
);
1169 static int is_efer_nx(void)
1171 unsigned long long efer
= 0;
1173 rdmsrl_safe(MSR_EFER
, &efer
);
1174 return efer
& EFER_NX
;
1177 static void cpuid_fix_nx_cap(struct kvm_vcpu
*vcpu
)
1180 struct kvm_cpuid_entry2
*e
, *entry
;
1183 for (i
= 0; i
< vcpu
->arch
.cpuid_nent
; ++i
) {
1184 e
= &vcpu
->arch
.cpuid_entries
[i
];
1185 if (e
->function
== 0x80000001) {
1190 if (entry
&& (entry
->edx
& (1 << 20)) && !is_efer_nx()) {
1191 entry
->edx
&= ~(1 << 20);
1192 printk(KERN_INFO
"kvm: guest NX capability removed\n");
1196 /* when an old userspace process fills a new kernel module */
1197 static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu
*vcpu
,
1198 struct kvm_cpuid
*cpuid
,
1199 struct kvm_cpuid_entry __user
*entries
)
1202 struct kvm_cpuid_entry
*cpuid_entries
;
1205 if (cpuid
->nent
> KVM_MAX_CPUID_ENTRIES
)
1208 cpuid_entries
= vmalloc(sizeof(struct kvm_cpuid_entry
) * cpuid
->nent
);
1212 if (copy_from_user(cpuid_entries
, entries
,
1213 cpuid
->nent
* sizeof(struct kvm_cpuid_entry
)))
1215 for (i
= 0; i
< cpuid
->nent
; i
++) {
1216 vcpu
->arch
.cpuid_entries
[i
].function
= cpuid_entries
[i
].function
;
1217 vcpu
->arch
.cpuid_entries
[i
].eax
= cpuid_entries
[i
].eax
;
1218 vcpu
->arch
.cpuid_entries
[i
].ebx
= cpuid_entries
[i
].ebx
;
1219 vcpu
->arch
.cpuid_entries
[i
].ecx
= cpuid_entries
[i
].ecx
;
1220 vcpu
->arch
.cpuid_entries
[i
].edx
= cpuid_entries
[i
].edx
;
1221 vcpu
->arch
.cpuid_entries
[i
].index
= 0;
1222 vcpu
->arch
.cpuid_entries
[i
].flags
= 0;
1223 vcpu
->arch
.cpuid_entries
[i
].padding
[0] = 0;
1224 vcpu
->arch
.cpuid_entries
[i
].padding
[1] = 0;
1225 vcpu
->arch
.cpuid_entries
[i
].padding
[2] = 0;
1227 vcpu
->arch
.cpuid_nent
= cpuid
->nent
;
1228 cpuid_fix_nx_cap(vcpu
);
1232 vfree(cpuid_entries
);
1237 static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu
*vcpu
,
1238 struct kvm_cpuid2
*cpuid
,
1239 struct kvm_cpuid_entry2 __user
*entries
)
1244 if (cpuid
->nent
> KVM_MAX_CPUID_ENTRIES
)
1247 if (copy_from_user(&vcpu
->arch
.cpuid_entries
, entries
,
1248 cpuid
->nent
* sizeof(struct kvm_cpuid_entry2
)))
1250 vcpu
->arch
.cpuid_nent
= cpuid
->nent
;
1257 static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu
*vcpu
,
1258 struct kvm_cpuid2
*cpuid
,
1259 struct kvm_cpuid_entry2 __user
*entries
)
1264 if (cpuid
->nent
< vcpu
->arch
.cpuid_nent
)
1267 if (copy_to_user(entries
, &vcpu
->arch
.cpuid_entries
,
1268 vcpu
->arch
.cpuid_nent
* sizeof(struct kvm_cpuid_entry2
)))
1273 cpuid
->nent
= vcpu
->arch
.cpuid_nent
;
1277 static void do_cpuid_1_ent(struct kvm_cpuid_entry2
*entry
, u32 function
,
1280 entry
->function
= function
;
1281 entry
->index
= index
;
1282 cpuid_count(entry
->function
, entry
->index
,
1283 &entry
->eax
, &entry
->ebx
, &entry
->ecx
, &entry
->edx
);
1287 #define F(x) bit(X86_FEATURE_##x)
1289 static void do_cpuid_ent(struct kvm_cpuid_entry2
*entry
, u32 function
,
1290 u32 index
, int *nent
, int maxnent
)
1292 unsigned f_nx
= is_efer_nx() ? F(NX
) : 0;
1293 #ifdef CONFIG_X86_64
1294 unsigned f_lm
= F(LM
);
1300 const u32 kvm_supported_word0_x86_features
=
1301 F(FPU
) | F(VME
) | F(DE
) | F(PSE
) |
1302 F(TSC
) | F(MSR
) | F(PAE
) | F(MCE
) |
1303 F(CX8
) | F(APIC
) | 0 /* Reserved */ | F(SEP
) |
1304 F(MTRR
) | F(PGE
) | F(MCA
) | F(CMOV
) |
1305 F(PAT
) | F(PSE36
) | 0 /* PSN */ | F(CLFLSH
) |
1306 0 /* Reserved, DS, ACPI */ | F(MMX
) |
1307 F(FXSR
) | F(XMM
) | F(XMM2
) | F(SELFSNOOP
) |
1308 0 /* HTT, TM, Reserved, PBE */;
1309 /* cpuid 0x80000001.edx */
1310 const u32 kvm_supported_word1_x86_features
=
1311 F(FPU
) | F(VME
) | F(DE
) | F(PSE
) |
1312 F(TSC
) | F(MSR
) | F(PAE
) | F(MCE
) |
1313 F(CX8
) | F(APIC
) | 0 /* Reserved */ | F(SYSCALL
) |
1314 F(MTRR
) | F(PGE
) | F(MCA
) | F(CMOV
) |
1315 F(PAT
) | F(PSE36
) | 0 /* Reserved */ |
1316 f_nx
| 0 /* Reserved */ | F(MMXEXT
) | F(MMX
) |
1317 F(FXSR
) | F(FXSR_OPT
) | 0 /* GBPAGES */ | 0 /* RDTSCP */ |
1318 0 /* Reserved */ | f_lm
| F(3DNOWEXT
) | F(3DNOW
);
1320 const u32 kvm_supported_word4_x86_features
=
1321 F(XMM3
) | 0 /* Reserved, DTES64, MONITOR */ |
1322 0 /* DS-CPL, VMX, SMX, EST */ |
1323 0 /* TM2 */ | F(SSSE3
) | 0 /* CNXT-ID */ | 0 /* Reserved */ |
1324 0 /* Reserved */ | F(CX16
) | 0 /* xTPR Update, PDCM */ |
1325 0 /* Reserved, DCA */ | F(XMM4_1
) |
1326 F(XMM4_2
) | 0 /* x2APIC */ | F(MOVBE
) | F(POPCNT
) |
1327 0 /* Reserved, XSAVE, OSXSAVE */;
1328 /* cpuid 0x80000001.ecx */
1329 const u32 kvm_supported_word6_x86_features
=
1330 F(LAHF_LM
) | F(CMP_LEGACY
) | F(SVM
) | 0 /* ExtApicSpace */ |
1331 F(CR8_LEGACY
) | F(ABM
) | F(SSE4A
) | F(MISALIGNSSE
) |
1332 F(3DNOWPREFETCH
) | 0 /* OSVW */ | 0 /* IBS */ | F(SSE5
) |
1333 0 /* SKINIT */ | 0 /* WDT */;
1335 /* all calls to cpuid_count() should be made on the same cpu */
1337 do_cpuid_1_ent(entry
, function
, index
);
1342 entry
->eax
= min(entry
->eax
, (u32
)0xb);
1345 entry
->edx
&= kvm_supported_word0_x86_features
;
1346 entry
->ecx
&= kvm_supported_word4_x86_features
;
1348 /* function 2 entries are STATEFUL. That is, repeated cpuid commands
1349 * may return different values. This forces us to get_cpu() before
1350 * issuing the first command, and also to emulate this annoying behavior
1351 * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */
1353 int t
, times
= entry
->eax
& 0xff;
1355 entry
->flags
|= KVM_CPUID_FLAG_STATEFUL_FUNC
;
1356 entry
->flags
|= KVM_CPUID_FLAG_STATE_READ_NEXT
;
1357 for (t
= 1; t
< times
&& *nent
< maxnent
; ++t
) {
1358 do_cpuid_1_ent(&entry
[t
], function
, 0);
1359 entry
[t
].flags
|= KVM_CPUID_FLAG_STATEFUL_FUNC
;
1364 /* function 4 and 0xb have additional index. */
1368 entry
->flags
|= KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1369 /* read more entries until cache_type is zero */
1370 for (i
= 1; *nent
< maxnent
; ++i
) {
1371 cache_type
= entry
[i
- 1].eax
& 0x1f;
1374 do_cpuid_1_ent(&entry
[i
], function
, i
);
1376 KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1384 entry
->flags
|= KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1385 /* read more entries until level_type is zero */
1386 for (i
= 1; *nent
< maxnent
; ++i
) {
1387 level_type
= entry
[i
- 1].ecx
& 0xff00;
1390 do_cpuid_1_ent(&entry
[i
], function
, i
);
1392 KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1398 entry
->eax
= min(entry
->eax
, 0x8000001a);
1401 entry
->edx
&= kvm_supported_word1_x86_features
;
1402 entry
->ecx
&= kvm_supported_word6_x86_features
;
1410 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2
*cpuid
,
1411 struct kvm_cpuid_entry2 __user
*entries
)
1413 struct kvm_cpuid_entry2
*cpuid_entries
;
1414 int limit
, nent
= 0, r
= -E2BIG
;
1417 if (cpuid
->nent
< 1)
1420 cpuid_entries
= vmalloc(sizeof(struct kvm_cpuid_entry2
) * cpuid
->nent
);
1424 do_cpuid_ent(&cpuid_entries
[0], 0, 0, &nent
, cpuid
->nent
);
1425 limit
= cpuid_entries
[0].eax
;
1426 for (func
= 1; func
<= limit
&& nent
< cpuid
->nent
; ++func
)
1427 do_cpuid_ent(&cpuid_entries
[nent
], func
, 0,
1428 &nent
, cpuid
->nent
);
1430 if (nent
>= cpuid
->nent
)
1433 do_cpuid_ent(&cpuid_entries
[nent
], 0x80000000, 0, &nent
, cpuid
->nent
);
1434 limit
= cpuid_entries
[nent
- 1].eax
;
1435 for (func
= 0x80000001; func
<= limit
&& nent
< cpuid
->nent
; ++func
)
1436 do_cpuid_ent(&cpuid_entries
[nent
], func
, 0,
1437 &nent
, cpuid
->nent
);
1439 if (copy_to_user(entries
, cpuid_entries
,
1440 nent
* sizeof(struct kvm_cpuid_entry2
)))
1446 vfree(cpuid_entries
);
1451 static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu
*vcpu
,
1452 struct kvm_lapic_state
*s
)
1455 memcpy(s
->regs
, vcpu
->arch
.apic
->regs
, sizeof *s
);
1461 static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu
*vcpu
,
1462 struct kvm_lapic_state
*s
)
1465 memcpy(vcpu
->arch
.apic
->regs
, s
->regs
, sizeof *s
);
1466 kvm_apic_post_state_restore(vcpu
);
1472 static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu
*vcpu
,
1473 struct kvm_interrupt
*irq
)
1475 if (irq
->irq
< 0 || irq
->irq
>= 256)
1477 if (irqchip_in_kernel(vcpu
->kvm
))
1481 kvm_queue_interrupt(vcpu
, irq
->irq
, false);
1488 static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu
*vcpu
)
1491 kvm_inject_nmi(vcpu
);
1497 static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu
*vcpu
,
1498 struct kvm_tpr_access_ctl
*tac
)
1502 vcpu
->arch
.tpr_access_reporting
= !!tac
->enabled
;
1506 long kvm_arch_vcpu_ioctl(struct file
*filp
,
1507 unsigned int ioctl
, unsigned long arg
)
1509 struct kvm_vcpu
*vcpu
= filp
->private_data
;
1510 void __user
*argp
= (void __user
*)arg
;
1512 struct kvm_lapic_state
*lapic
= NULL
;
1515 case KVM_GET_LAPIC
: {
1516 lapic
= kzalloc(sizeof(struct kvm_lapic_state
), GFP_KERNEL
);
1521 r
= kvm_vcpu_ioctl_get_lapic(vcpu
, lapic
);
1525 if (copy_to_user(argp
, lapic
, sizeof(struct kvm_lapic_state
)))
1530 case KVM_SET_LAPIC
: {
1531 lapic
= kmalloc(sizeof(struct kvm_lapic_state
), GFP_KERNEL
);
1536 if (copy_from_user(lapic
, argp
, sizeof(struct kvm_lapic_state
)))
1538 r
= kvm_vcpu_ioctl_set_lapic(vcpu
, lapic
);
1544 case KVM_INTERRUPT
: {
1545 struct kvm_interrupt irq
;
1548 if (copy_from_user(&irq
, argp
, sizeof irq
))
1550 r
= kvm_vcpu_ioctl_interrupt(vcpu
, &irq
);
1557 r
= kvm_vcpu_ioctl_nmi(vcpu
);
1563 case KVM_SET_CPUID
: {
1564 struct kvm_cpuid __user
*cpuid_arg
= argp
;
1565 struct kvm_cpuid cpuid
;
1568 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1570 r
= kvm_vcpu_ioctl_set_cpuid(vcpu
, &cpuid
, cpuid_arg
->entries
);
1575 case KVM_SET_CPUID2
: {
1576 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
1577 struct kvm_cpuid2 cpuid
;
1580 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1582 r
= kvm_vcpu_ioctl_set_cpuid2(vcpu
, &cpuid
,
1583 cpuid_arg
->entries
);
1588 case KVM_GET_CPUID2
: {
1589 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
1590 struct kvm_cpuid2 cpuid
;
1593 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1595 r
= kvm_vcpu_ioctl_get_cpuid2(vcpu
, &cpuid
,
1596 cpuid_arg
->entries
);
1600 if (copy_to_user(cpuid_arg
, &cpuid
, sizeof cpuid
))
1606 r
= msr_io(vcpu
, argp
, kvm_get_msr
, 1);
1609 r
= msr_io(vcpu
, argp
, do_set_msr
, 0);
1611 case KVM_TPR_ACCESS_REPORTING
: {
1612 struct kvm_tpr_access_ctl tac
;
1615 if (copy_from_user(&tac
, argp
, sizeof tac
))
1617 r
= vcpu_ioctl_tpr_access_reporting(vcpu
, &tac
);
1621 if (copy_to_user(argp
, &tac
, sizeof tac
))
1626 case KVM_SET_VAPIC_ADDR
: {
1627 struct kvm_vapic_addr va
;
1630 if (!irqchip_in_kernel(vcpu
->kvm
))
1633 if (copy_from_user(&va
, argp
, sizeof va
))
1636 kvm_lapic_set_vapic_addr(vcpu
, va
.vapic_addr
);
1647 static int kvm_vm_ioctl_set_tss_addr(struct kvm
*kvm
, unsigned long addr
)
1651 if (addr
> (unsigned int)(-3 * PAGE_SIZE
))
1653 ret
= kvm_x86_ops
->set_tss_addr(kvm
, addr
);
1657 static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm
*kvm
,
1658 u32 kvm_nr_mmu_pages
)
1660 if (kvm_nr_mmu_pages
< KVM_MIN_ALLOC_MMU_PAGES
)
1663 down_write(&kvm
->slots_lock
);
1664 spin_lock(&kvm
->mmu_lock
);
1666 kvm_mmu_change_mmu_pages(kvm
, kvm_nr_mmu_pages
);
1667 kvm
->arch
.n_requested_mmu_pages
= kvm_nr_mmu_pages
;
1669 spin_unlock(&kvm
->mmu_lock
);
1670 up_write(&kvm
->slots_lock
);
1674 static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm
*kvm
)
1676 return kvm
->arch
.n_alloc_mmu_pages
;
1679 gfn_t
unalias_gfn(struct kvm
*kvm
, gfn_t gfn
)
1682 struct kvm_mem_alias
*alias
;
1684 for (i
= 0; i
< kvm
->arch
.naliases
; ++i
) {
1685 alias
= &kvm
->arch
.aliases
[i
];
1686 if (gfn
>= alias
->base_gfn
1687 && gfn
< alias
->base_gfn
+ alias
->npages
)
1688 return alias
->target_gfn
+ gfn
- alias
->base_gfn
;
1694 * Set a new alias region. Aliases map a portion of physical memory into
1695 * another portion. This is useful for memory windows, for example the PC
1698 static int kvm_vm_ioctl_set_memory_alias(struct kvm
*kvm
,
1699 struct kvm_memory_alias
*alias
)
1702 struct kvm_mem_alias
*p
;
1705 /* General sanity checks */
1706 if (alias
->memory_size
& (PAGE_SIZE
- 1))
1708 if (alias
->guest_phys_addr
& (PAGE_SIZE
- 1))
1710 if (alias
->slot
>= KVM_ALIAS_SLOTS
)
1712 if (alias
->guest_phys_addr
+ alias
->memory_size
1713 < alias
->guest_phys_addr
)
1715 if (alias
->target_phys_addr
+ alias
->memory_size
1716 < alias
->target_phys_addr
)
1719 down_write(&kvm
->slots_lock
);
1720 spin_lock(&kvm
->mmu_lock
);
1722 p
= &kvm
->arch
.aliases
[alias
->slot
];
1723 p
->base_gfn
= alias
->guest_phys_addr
>> PAGE_SHIFT
;
1724 p
->npages
= alias
->memory_size
>> PAGE_SHIFT
;
1725 p
->target_gfn
= alias
->target_phys_addr
>> PAGE_SHIFT
;
1727 for (n
= KVM_ALIAS_SLOTS
; n
> 0; --n
)
1728 if (kvm
->arch
.aliases
[n
- 1].npages
)
1730 kvm
->arch
.naliases
= n
;
1732 spin_unlock(&kvm
->mmu_lock
);
1733 kvm_mmu_zap_all(kvm
);
1735 up_write(&kvm
->slots_lock
);
1743 static int kvm_vm_ioctl_get_irqchip(struct kvm
*kvm
, struct kvm_irqchip
*chip
)
1748 switch (chip
->chip_id
) {
1749 case KVM_IRQCHIP_PIC_MASTER
:
1750 memcpy(&chip
->chip
.pic
,
1751 &pic_irqchip(kvm
)->pics
[0],
1752 sizeof(struct kvm_pic_state
));
1754 case KVM_IRQCHIP_PIC_SLAVE
:
1755 memcpy(&chip
->chip
.pic
,
1756 &pic_irqchip(kvm
)->pics
[1],
1757 sizeof(struct kvm_pic_state
));
1759 case KVM_IRQCHIP_IOAPIC
:
1760 memcpy(&chip
->chip
.ioapic
,
1761 ioapic_irqchip(kvm
),
1762 sizeof(struct kvm_ioapic_state
));
1771 static int kvm_vm_ioctl_set_irqchip(struct kvm
*kvm
, struct kvm_irqchip
*chip
)
1776 switch (chip
->chip_id
) {
1777 case KVM_IRQCHIP_PIC_MASTER
:
1778 memcpy(&pic_irqchip(kvm
)->pics
[0],
1780 sizeof(struct kvm_pic_state
));
1782 case KVM_IRQCHIP_PIC_SLAVE
:
1783 memcpy(&pic_irqchip(kvm
)->pics
[1],
1785 sizeof(struct kvm_pic_state
));
1787 case KVM_IRQCHIP_IOAPIC
:
1788 memcpy(ioapic_irqchip(kvm
),
1790 sizeof(struct kvm_ioapic_state
));
1796 kvm_pic_update_irq(pic_irqchip(kvm
));
1800 static int kvm_vm_ioctl_get_pit(struct kvm
*kvm
, struct kvm_pit_state
*ps
)
1804 memcpy(ps
, &kvm
->arch
.vpit
->pit_state
, sizeof(struct kvm_pit_state
));
1808 static int kvm_vm_ioctl_set_pit(struct kvm
*kvm
, struct kvm_pit_state
*ps
)
1812 memcpy(&kvm
->arch
.vpit
->pit_state
, ps
, sizeof(struct kvm_pit_state
));
1813 kvm_pit_load_count(kvm
, 0, ps
->channels
[0].count
);
1817 static int kvm_vm_ioctl_reinject(struct kvm
*kvm
,
1818 struct kvm_reinject_control
*control
)
1820 if (!kvm
->arch
.vpit
)
1822 kvm
->arch
.vpit
->pit_state
.pit_timer
.reinject
= control
->pit_reinject
;
1827 * Get (and clear) the dirty memory log for a memory slot.
1829 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
,
1830 struct kvm_dirty_log
*log
)
1834 struct kvm_memory_slot
*memslot
;
1837 down_write(&kvm
->slots_lock
);
1839 r
= kvm_get_dirty_log(kvm
, log
, &is_dirty
);
1843 /* If nothing is dirty, don't bother messing with page tables. */
1845 spin_lock(&kvm
->mmu_lock
);
1846 kvm_mmu_slot_remove_write_access(kvm
, log
->slot
);
1847 spin_unlock(&kvm
->mmu_lock
);
1848 kvm_flush_remote_tlbs(kvm
);
1849 memslot
= &kvm
->memslots
[log
->slot
];
1850 n
= ALIGN(memslot
->npages
, BITS_PER_LONG
) / 8;
1851 memset(memslot
->dirty_bitmap
, 0, n
);
1855 up_write(&kvm
->slots_lock
);
1859 long kvm_arch_vm_ioctl(struct file
*filp
,
1860 unsigned int ioctl
, unsigned long arg
)
1862 struct kvm
*kvm
= filp
->private_data
;
1863 void __user
*argp
= (void __user
*)arg
;
1866 * This union makes it completely explicit to gcc-3.x
1867 * that these two variables' stack usage should be
1868 * combined, not added together.
1871 struct kvm_pit_state ps
;
1872 struct kvm_memory_alias alias
;
1876 case KVM_SET_TSS_ADDR
:
1877 r
= kvm_vm_ioctl_set_tss_addr(kvm
, arg
);
1881 case KVM_SET_MEMORY_REGION
: {
1882 struct kvm_memory_region kvm_mem
;
1883 struct kvm_userspace_memory_region kvm_userspace_mem
;
1886 if (copy_from_user(&kvm_mem
, argp
, sizeof kvm_mem
))
1888 kvm_userspace_mem
.slot
= kvm_mem
.slot
;
1889 kvm_userspace_mem
.flags
= kvm_mem
.flags
;
1890 kvm_userspace_mem
.guest_phys_addr
= kvm_mem
.guest_phys_addr
;
1891 kvm_userspace_mem
.memory_size
= kvm_mem
.memory_size
;
1892 r
= kvm_vm_ioctl_set_memory_region(kvm
, &kvm_userspace_mem
, 0);
1897 case KVM_SET_NR_MMU_PAGES
:
1898 r
= kvm_vm_ioctl_set_nr_mmu_pages(kvm
, arg
);
1902 case KVM_GET_NR_MMU_PAGES
:
1903 r
= kvm_vm_ioctl_get_nr_mmu_pages(kvm
);
1905 case KVM_SET_MEMORY_ALIAS
:
1907 if (copy_from_user(&u
.alias
, argp
, sizeof(struct kvm_memory_alias
)))
1909 r
= kvm_vm_ioctl_set_memory_alias(kvm
, &u
.alias
);
1913 case KVM_CREATE_IRQCHIP
:
1915 kvm
->arch
.vpic
= kvm_create_pic(kvm
);
1916 if (kvm
->arch
.vpic
) {
1917 r
= kvm_ioapic_init(kvm
);
1919 kfree(kvm
->arch
.vpic
);
1920 kvm
->arch
.vpic
= NULL
;
1925 r
= kvm_setup_default_irq_routing(kvm
);
1927 kfree(kvm
->arch
.vpic
);
1928 kfree(kvm
->arch
.vioapic
);
1932 case KVM_CREATE_PIT
:
1933 mutex_lock(&kvm
->lock
);
1936 goto create_pit_unlock
;
1938 kvm
->arch
.vpit
= kvm_create_pit(kvm
);
1942 mutex_unlock(&kvm
->lock
);
1944 case KVM_IRQ_LINE_STATUS
:
1945 case KVM_IRQ_LINE
: {
1946 struct kvm_irq_level irq_event
;
1949 if (copy_from_user(&irq_event
, argp
, sizeof irq_event
))
1951 if (irqchip_in_kernel(kvm
)) {
1953 mutex_lock(&kvm
->lock
);
1954 status
= kvm_set_irq(kvm
, KVM_USERSPACE_IRQ_SOURCE_ID
,
1955 irq_event
.irq
, irq_event
.level
);
1956 mutex_unlock(&kvm
->lock
);
1957 if (ioctl
== KVM_IRQ_LINE_STATUS
) {
1958 irq_event
.status
= status
;
1959 if (copy_to_user(argp
, &irq_event
,
1967 case KVM_GET_IRQCHIP
: {
1968 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1969 struct kvm_irqchip
*chip
= kmalloc(sizeof(*chip
), GFP_KERNEL
);
1975 if (copy_from_user(chip
, argp
, sizeof *chip
))
1976 goto get_irqchip_out
;
1978 if (!irqchip_in_kernel(kvm
))
1979 goto get_irqchip_out
;
1980 r
= kvm_vm_ioctl_get_irqchip(kvm
, chip
);
1982 goto get_irqchip_out
;
1984 if (copy_to_user(argp
, chip
, sizeof *chip
))
1985 goto get_irqchip_out
;
1993 case KVM_SET_IRQCHIP
: {
1994 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1995 struct kvm_irqchip
*chip
= kmalloc(sizeof(*chip
), GFP_KERNEL
);
2001 if (copy_from_user(chip
, argp
, sizeof *chip
))
2002 goto set_irqchip_out
;
2004 if (!irqchip_in_kernel(kvm
))
2005 goto set_irqchip_out
;
2006 r
= kvm_vm_ioctl_set_irqchip(kvm
, chip
);
2008 goto set_irqchip_out
;
2018 if (copy_from_user(&u
.ps
, argp
, sizeof(struct kvm_pit_state
)))
2021 if (!kvm
->arch
.vpit
)
2023 r
= kvm_vm_ioctl_get_pit(kvm
, &u
.ps
);
2027 if (copy_to_user(argp
, &u
.ps
, sizeof(struct kvm_pit_state
)))
2034 if (copy_from_user(&u
.ps
, argp
, sizeof u
.ps
))
2037 if (!kvm
->arch
.vpit
)
2039 r
= kvm_vm_ioctl_set_pit(kvm
, &u
.ps
);
2045 case KVM_REINJECT_CONTROL
: {
2046 struct kvm_reinject_control control
;
2048 if (copy_from_user(&control
, argp
, sizeof(control
)))
2050 r
= kvm_vm_ioctl_reinject(kvm
, &control
);
2063 static void kvm_init_msr_list(void)
2068 for (i
= j
= 0; i
< ARRAY_SIZE(msrs_to_save
); i
++) {
2069 if (rdmsr_safe(msrs_to_save
[i
], &dummy
[0], &dummy
[1]) < 0)
2072 msrs_to_save
[j
] = msrs_to_save
[i
];
2075 num_msrs_to_save
= j
;
2079 * Only apic need an MMIO device hook, so shortcut now..
2081 static struct kvm_io_device
*vcpu_find_pervcpu_dev(struct kvm_vcpu
*vcpu
,
2082 gpa_t addr
, int len
,
2085 struct kvm_io_device
*dev
;
2087 if (vcpu
->arch
.apic
) {
2088 dev
= &vcpu
->arch
.apic
->dev
;
2089 if (dev
->in_range(dev
, addr
, len
, is_write
))
2096 static struct kvm_io_device
*vcpu_find_mmio_dev(struct kvm_vcpu
*vcpu
,
2097 gpa_t addr
, int len
,
2100 struct kvm_io_device
*dev
;
2102 dev
= vcpu_find_pervcpu_dev(vcpu
, addr
, len
, is_write
);
2104 dev
= kvm_io_bus_find_dev(&vcpu
->kvm
->mmio_bus
, addr
, len
,
2109 static int kvm_read_guest_virt(gva_t addr
, void *val
, unsigned int bytes
,
2110 struct kvm_vcpu
*vcpu
)
2113 int r
= X86EMUL_CONTINUE
;
2116 gpa_t gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
2117 unsigned offset
= addr
& (PAGE_SIZE
-1);
2118 unsigned toread
= min(bytes
, (unsigned)PAGE_SIZE
- offset
);
2121 if (gpa
== UNMAPPED_GVA
) {
2122 r
= X86EMUL_PROPAGATE_FAULT
;
2125 ret
= kvm_read_guest(vcpu
->kvm
, gpa
, data
, toread
);
2127 r
= X86EMUL_UNHANDLEABLE
;
2139 static int kvm_write_guest_virt(gva_t addr
, void *val
, unsigned int bytes
,
2140 struct kvm_vcpu
*vcpu
)
2143 int r
= X86EMUL_CONTINUE
;
2146 gpa_t gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
2147 unsigned offset
= addr
& (PAGE_SIZE
-1);
2148 unsigned towrite
= min(bytes
, (unsigned)PAGE_SIZE
- offset
);
2151 if (gpa
== UNMAPPED_GVA
) {
2152 r
= X86EMUL_PROPAGATE_FAULT
;
2155 ret
= kvm_write_guest(vcpu
->kvm
, gpa
, data
, towrite
);
2157 r
= X86EMUL_UNHANDLEABLE
;
2170 static int emulator_read_emulated(unsigned long addr
,
2173 struct kvm_vcpu
*vcpu
)
2175 struct kvm_io_device
*mmio_dev
;
2178 if (vcpu
->mmio_read_completed
) {
2179 memcpy(val
, vcpu
->mmio_data
, bytes
);
2180 vcpu
->mmio_read_completed
= 0;
2181 return X86EMUL_CONTINUE
;
2184 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
2186 /* For APIC access vmexit */
2187 if ((gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
2190 if (kvm_read_guest_virt(addr
, val
, bytes
, vcpu
)
2191 == X86EMUL_CONTINUE
)
2192 return X86EMUL_CONTINUE
;
2193 if (gpa
== UNMAPPED_GVA
)
2194 return X86EMUL_PROPAGATE_FAULT
;
2198 * Is this MMIO handled locally?
2200 mutex_lock(&vcpu
->kvm
->lock
);
2201 mmio_dev
= vcpu_find_mmio_dev(vcpu
, gpa
, bytes
, 0);
2203 kvm_iodevice_read(mmio_dev
, gpa
, bytes
, val
);
2204 mutex_unlock(&vcpu
->kvm
->lock
);
2205 return X86EMUL_CONTINUE
;
2207 mutex_unlock(&vcpu
->kvm
->lock
);
2209 vcpu
->mmio_needed
= 1;
2210 vcpu
->mmio_phys_addr
= gpa
;
2211 vcpu
->mmio_size
= bytes
;
2212 vcpu
->mmio_is_write
= 0;
2214 return X86EMUL_UNHANDLEABLE
;
2217 int emulator_write_phys(struct kvm_vcpu
*vcpu
, gpa_t gpa
,
2218 const void *val
, int bytes
)
2222 ret
= kvm_write_guest(vcpu
->kvm
, gpa
, val
, bytes
);
2225 kvm_mmu_pte_write(vcpu
, gpa
, val
, bytes
, 1);
2229 static int emulator_write_emulated_onepage(unsigned long addr
,
2232 struct kvm_vcpu
*vcpu
)
2234 struct kvm_io_device
*mmio_dev
;
2237 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
2239 if (gpa
== UNMAPPED_GVA
) {
2240 kvm_inject_page_fault(vcpu
, addr
, 2);
2241 return X86EMUL_PROPAGATE_FAULT
;
2244 /* For APIC access vmexit */
2245 if ((gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
2248 if (emulator_write_phys(vcpu
, gpa
, val
, bytes
))
2249 return X86EMUL_CONTINUE
;
2253 * Is this MMIO handled locally?
2255 mutex_lock(&vcpu
->kvm
->lock
);
2256 mmio_dev
= vcpu_find_mmio_dev(vcpu
, gpa
, bytes
, 1);
2258 kvm_iodevice_write(mmio_dev
, gpa
, bytes
, val
);
2259 mutex_unlock(&vcpu
->kvm
->lock
);
2260 return X86EMUL_CONTINUE
;
2262 mutex_unlock(&vcpu
->kvm
->lock
);
2264 vcpu
->mmio_needed
= 1;
2265 vcpu
->mmio_phys_addr
= gpa
;
2266 vcpu
->mmio_size
= bytes
;
2267 vcpu
->mmio_is_write
= 1;
2268 memcpy(vcpu
->mmio_data
, val
, bytes
);
2270 return X86EMUL_CONTINUE
;
2273 int emulator_write_emulated(unsigned long addr
,
2276 struct kvm_vcpu
*vcpu
)
2278 /* Crossing a page boundary? */
2279 if (((addr
+ bytes
- 1) ^ addr
) & PAGE_MASK
) {
2282 now
= -addr
& ~PAGE_MASK
;
2283 rc
= emulator_write_emulated_onepage(addr
, val
, now
, vcpu
);
2284 if (rc
!= X86EMUL_CONTINUE
)
2290 return emulator_write_emulated_onepage(addr
, val
, bytes
, vcpu
);
2292 EXPORT_SYMBOL_GPL(emulator_write_emulated
);
2294 static int emulator_cmpxchg_emulated(unsigned long addr
,
2298 struct kvm_vcpu
*vcpu
)
2300 printk_once(KERN_WARNING
"kvm: emulating exchange as write\n");
2301 #ifndef CONFIG_X86_64
2302 /* guests cmpxchg8b have to be emulated atomically */
2309 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
2311 if (gpa
== UNMAPPED_GVA
||
2312 (gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
2315 if (((gpa
+ bytes
- 1) & PAGE_MASK
) != (gpa
& PAGE_MASK
))
2320 page
= gfn_to_page(vcpu
->kvm
, gpa
>> PAGE_SHIFT
);
2322 kaddr
= kmap_atomic(page
, KM_USER0
);
2323 set_64bit((u64
*)(kaddr
+ offset_in_page(gpa
)), val
);
2324 kunmap_atomic(kaddr
, KM_USER0
);
2325 kvm_release_page_dirty(page
);
2330 return emulator_write_emulated(addr
, new, bytes
, vcpu
);
2333 static unsigned long get_segment_base(struct kvm_vcpu
*vcpu
, int seg
)
2335 return kvm_x86_ops
->get_segment_base(vcpu
, seg
);
2338 int emulate_invlpg(struct kvm_vcpu
*vcpu
, gva_t address
)
2340 kvm_mmu_invlpg(vcpu
, address
);
2341 return X86EMUL_CONTINUE
;
2344 int emulate_clts(struct kvm_vcpu
*vcpu
)
2346 KVMTRACE_0D(CLTS
, vcpu
, handler
);
2347 kvm_x86_ops
->set_cr0(vcpu
, vcpu
->arch
.cr0
& ~X86_CR0_TS
);
2348 return X86EMUL_CONTINUE
;
2351 int emulator_get_dr(struct x86_emulate_ctxt
*ctxt
, int dr
, unsigned long *dest
)
2353 struct kvm_vcpu
*vcpu
= ctxt
->vcpu
;
2357 *dest
= kvm_x86_ops
->get_dr(vcpu
, dr
);
2358 return X86EMUL_CONTINUE
;
2360 pr_unimpl(vcpu
, "%s: unexpected dr %u\n", __func__
, dr
);
2361 return X86EMUL_UNHANDLEABLE
;
2365 int emulator_set_dr(struct x86_emulate_ctxt
*ctxt
, int dr
, unsigned long value
)
2367 unsigned long mask
= (ctxt
->mode
== X86EMUL_MODE_PROT64
) ? ~0ULL : ~0U;
2370 kvm_x86_ops
->set_dr(ctxt
->vcpu
, dr
, value
& mask
, &exception
);
2372 /* FIXME: better handling */
2373 return X86EMUL_UNHANDLEABLE
;
2375 return X86EMUL_CONTINUE
;
2378 void kvm_report_emulation_failure(struct kvm_vcpu
*vcpu
, const char *context
)
2381 unsigned long rip
= kvm_rip_read(vcpu
);
2382 unsigned long rip_linear
;
2384 if (!printk_ratelimit())
2387 rip_linear
= rip
+ get_segment_base(vcpu
, VCPU_SREG_CS
);
2389 kvm_read_guest_virt(rip_linear
, (void *)opcodes
, 4, vcpu
);
2391 printk(KERN_ERR
"emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
2392 context
, rip
, opcodes
[0], opcodes
[1], opcodes
[2], opcodes
[3]);
2394 EXPORT_SYMBOL_GPL(kvm_report_emulation_failure
);
2396 static struct x86_emulate_ops emulate_ops
= {
2397 .read_std
= kvm_read_guest_virt
,
2398 .read_emulated
= emulator_read_emulated
,
2399 .write_emulated
= emulator_write_emulated
,
2400 .cmpxchg_emulated
= emulator_cmpxchg_emulated
,
2403 static void cache_all_regs(struct kvm_vcpu
*vcpu
)
2405 kvm_register_read(vcpu
, VCPU_REGS_RAX
);
2406 kvm_register_read(vcpu
, VCPU_REGS_RSP
);
2407 kvm_register_read(vcpu
, VCPU_REGS_RIP
);
2408 vcpu
->arch
.regs_dirty
= ~0;
2411 int emulate_instruction(struct kvm_vcpu
*vcpu
,
2412 struct kvm_run
*run
,
2418 struct decode_cache
*c
;
2420 kvm_clear_exception_queue(vcpu
);
2421 vcpu
->arch
.mmio_fault_cr2
= cr2
;
2423 * TODO: fix x86_emulate.c to use guest_read/write_register
2424 * instead of direct ->regs accesses, can save hundred cycles
2425 * on Intel for instructions that don't read/change RSP, for
2428 cache_all_regs(vcpu
);
2430 vcpu
->mmio_is_write
= 0;
2431 vcpu
->arch
.pio
.string
= 0;
2433 if (!(emulation_type
& EMULTYPE_NO_DECODE
)) {
2435 kvm_x86_ops
->get_cs_db_l_bits(vcpu
, &cs_db
, &cs_l
);
2437 vcpu
->arch
.emulate_ctxt
.vcpu
= vcpu
;
2438 vcpu
->arch
.emulate_ctxt
.eflags
= kvm_x86_ops
->get_rflags(vcpu
);
2439 vcpu
->arch
.emulate_ctxt
.mode
=
2440 (vcpu
->arch
.emulate_ctxt
.eflags
& X86_EFLAGS_VM
)
2441 ? X86EMUL_MODE_REAL
: cs_l
2442 ? X86EMUL_MODE_PROT64
: cs_db
2443 ? X86EMUL_MODE_PROT32
: X86EMUL_MODE_PROT16
;
2445 r
= x86_decode_insn(&vcpu
->arch
.emulate_ctxt
, &emulate_ops
);
2447 /* Reject the instructions other than VMCALL/VMMCALL when
2448 * try to emulate invalid opcode */
2449 c
= &vcpu
->arch
.emulate_ctxt
.decode
;
2450 if ((emulation_type
& EMULTYPE_TRAP_UD
) &&
2451 (!(c
->twobyte
&& c
->b
== 0x01 &&
2452 (c
->modrm_reg
== 0 || c
->modrm_reg
== 3) &&
2453 c
->modrm_mod
== 3 && c
->modrm_rm
== 1)))
2454 return EMULATE_FAIL
;
2456 ++vcpu
->stat
.insn_emulation
;
2458 ++vcpu
->stat
.insn_emulation_fail
;
2459 if (kvm_mmu_unprotect_page_virt(vcpu
, cr2
))
2460 return EMULATE_DONE
;
2461 return EMULATE_FAIL
;
2465 if (emulation_type
& EMULTYPE_SKIP
) {
2466 kvm_rip_write(vcpu
, vcpu
->arch
.emulate_ctxt
.decode
.eip
);
2467 return EMULATE_DONE
;
2470 r
= x86_emulate_insn(&vcpu
->arch
.emulate_ctxt
, &emulate_ops
);
2471 shadow_mask
= vcpu
->arch
.emulate_ctxt
.interruptibility
;
2474 kvm_x86_ops
->set_interrupt_shadow(vcpu
, shadow_mask
);
2476 if (vcpu
->arch
.pio
.string
)
2477 return EMULATE_DO_MMIO
;
2479 if ((r
|| vcpu
->mmio_is_write
) && run
) {
2480 run
->exit_reason
= KVM_EXIT_MMIO
;
2481 run
->mmio
.phys_addr
= vcpu
->mmio_phys_addr
;
2482 memcpy(run
->mmio
.data
, vcpu
->mmio_data
, 8);
2483 run
->mmio
.len
= vcpu
->mmio_size
;
2484 run
->mmio
.is_write
= vcpu
->mmio_is_write
;
2488 if (kvm_mmu_unprotect_page_virt(vcpu
, cr2
))
2489 return EMULATE_DONE
;
2490 if (!vcpu
->mmio_needed
) {
2491 kvm_report_emulation_failure(vcpu
, "mmio");
2492 return EMULATE_FAIL
;
2494 return EMULATE_DO_MMIO
;
2497 kvm_x86_ops
->set_rflags(vcpu
, vcpu
->arch
.emulate_ctxt
.eflags
);
2499 if (vcpu
->mmio_is_write
) {
2500 vcpu
->mmio_needed
= 0;
2501 return EMULATE_DO_MMIO
;
2504 return EMULATE_DONE
;
2506 EXPORT_SYMBOL_GPL(emulate_instruction
);
2508 static int pio_copy_data(struct kvm_vcpu
*vcpu
)
2510 void *p
= vcpu
->arch
.pio_data
;
2511 gva_t q
= vcpu
->arch
.pio
.guest_gva
;
2515 bytes
= vcpu
->arch
.pio
.size
* vcpu
->arch
.pio
.cur_count
;
2516 if (vcpu
->arch
.pio
.in
)
2517 ret
= kvm_write_guest_virt(q
, p
, bytes
, vcpu
);
2519 ret
= kvm_read_guest_virt(q
, p
, bytes
, vcpu
);
2523 int complete_pio(struct kvm_vcpu
*vcpu
)
2525 struct kvm_pio_request
*io
= &vcpu
->arch
.pio
;
2532 val
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
2533 memcpy(&val
, vcpu
->arch
.pio_data
, io
->size
);
2534 kvm_register_write(vcpu
, VCPU_REGS_RAX
, val
);
2538 r
= pio_copy_data(vcpu
);
2545 delta
*= io
->cur_count
;
2547 * The size of the register should really depend on
2548 * current address size.
2550 val
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
2552 kvm_register_write(vcpu
, VCPU_REGS_RCX
, val
);
2558 val
= kvm_register_read(vcpu
, VCPU_REGS_RDI
);
2560 kvm_register_write(vcpu
, VCPU_REGS_RDI
, val
);
2562 val
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
2564 kvm_register_write(vcpu
, VCPU_REGS_RSI
, val
);
2568 io
->count
-= io
->cur_count
;
2574 static void kernel_pio(struct kvm_io_device
*pio_dev
,
2575 struct kvm_vcpu
*vcpu
,
2578 /* TODO: String I/O for in kernel device */
2580 mutex_lock(&vcpu
->kvm
->lock
);
2581 if (vcpu
->arch
.pio
.in
)
2582 kvm_iodevice_read(pio_dev
, vcpu
->arch
.pio
.port
,
2583 vcpu
->arch
.pio
.size
,
2586 kvm_iodevice_write(pio_dev
, vcpu
->arch
.pio
.port
,
2587 vcpu
->arch
.pio
.size
,
2589 mutex_unlock(&vcpu
->kvm
->lock
);
2592 static void pio_string_write(struct kvm_io_device
*pio_dev
,
2593 struct kvm_vcpu
*vcpu
)
2595 struct kvm_pio_request
*io
= &vcpu
->arch
.pio
;
2596 void *pd
= vcpu
->arch
.pio_data
;
2599 mutex_lock(&vcpu
->kvm
->lock
);
2600 for (i
= 0; i
< io
->cur_count
; i
++) {
2601 kvm_iodevice_write(pio_dev
, io
->port
,
2606 mutex_unlock(&vcpu
->kvm
->lock
);
2609 static struct kvm_io_device
*vcpu_find_pio_dev(struct kvm_vcpu
*vcpu
,
2610 gpa_t addr
, int len
,
2613 return kvm_io_bus_find_dev(&vcpu
->kvm
->pio_bus
, addr
, len
, is_write
);
2616 int kvm_emulate_pio(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
, int in
,
2617 int size
, unsigned port
)
2619 struct kvm_io_device
*pio_dev
;
2622 vcpu
->run
->exit_reason
= KVM_EXIT_IO
;
2623 vcpu
->run
->io
.direction
= in
? KVM_EXIT_IO_IN
: KVM_EXIT_IO_OUT
;
2624 vcpu
->run
->io
.size
= vcpu
->arch
.pio
.size
= size
;
2625 vcpu
->run
->io
.data_offset
= KVM_PIO_PAGE_OFFSET
* PAGE_SIZE
;
2626 vcpu
->run
->io
.count
= vcpu
->arch
.pio
.count
= vcpu
->arch
.pio
.cur_count
= 1;
2627 vcpu
->run
->io
.port
= vcpu
->arch
.pio
.port
= port
;
2628 vcpu
->arch
.pio
.in
= in
;
2629 vcpu
->arch
.pio
.string
= 0;
2630 vcpu
->arch
.pio
.down
= 0;
2631 vcpu
->arch
.pio
.rep
= 0;
2633 if (vcpu
->run
->io
.direction
== KVM_EXIT_IO_IN
)
2634 KVMTRACE_2D(IO_READ
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2637 KVMTRACE_2D(IO_WRITE
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2640 val
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
2641 memcpy(vcpu
->arch
.pio_data
, &val
, 4);
2643 pio_dev
= vcpu_find_pio_dev(vcpu
, port
, size
, !in
);
2645 kernel_pio(pio_dev
, vcpu
, vcpu
->arch
.pio_data
);
2651 EXPORT_SYMBOL_GPL(kvm_emulate_pio
);
2653 int kvm_emulate_pio_string(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
, int in
,
2654 int size
, unsigned long count
, int down
,
2655 gva_t address
, int rep
, unsigned port
)
2657 unsigned now
, in_page
;
2659 struct kvm_io_device
*pio_dev
;
2661 vcpu
->run
->exit_reason
= KVM_EXIT_IO
;
2662 vcpu
->run
->io
.direction
= in
? KVM_EXIT_IO_IN
: KVM_EXIT_IO_OUT
;
2663 vcpu
->run
->io
.size
= vcpu
->arch
.pio
.size
= size
;
2664 vcpu
->run
->io
.data_offset
= KVM_PIO_PAGE_OFFSET
* PAGE_SIZE
;
2665 vcpu
->run
->io
.count
= vcpu
->arch
.pio
.count
= vcpu
->arch
.pio
.cur_count
= count
;
2666 vcpu
->run
->io
.port
= vcpu
->arch
.pio
.port
= port
;
2667 vcpu
->arch
.pio
.in
= in
;
2668 vcpu
->arch
.pio
.string
= 1;
2669 vcpu
->arch
.pio
.down
= down
;
2670 vcpu
->arch
.pio
.rep
= rep
;
2672 if (vcpu
->run
->io
.direction
== KVM_EXIT_IO_IN
)
2673 KVMTRACE_2D(IO_READ
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2676 KVMTRACE_2D(IO_WRITE
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2680 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
2685 in_page
= PAGE_SIZE
- offset_in_page(address
);
2687 in_page
= offset_in_page(address
) + size
;
2688 now
= min(count
, (unsigned long)in_page
/ size
);
2693 * String I/O in reverse. Yuck. Kill the guest, fix later.
2695 pr_unimpl(vcpu
, "guest string pio down\n");
2696 kvm_inject_gp(vcpu
, 0);
2699 vcpu
->run
->io
.count
= now
;
2700 vcpu
->arch
.pio
.cur_count
= now
;
2702 if (vcpu
->arch
.pio
.cur_count
== vcpu
->arch
.pio
.count
)
2703 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
2705 vcpu
->arch
.pio
.guest_gva
= address
;
2707 pio_dev
= vcpu_find_pio_dev(vcpu
, port
,
2708 vcpu
->arch
.pio
.cur_count
,
2709 !vcpu
->arch
.pio
.in
);
2710 if (!vcpu
->arch
.pio
.in
) {
2711 /* string PIO write */
2712 ret
= pio_copy_data(vcpu
);
2713 if (ret
== X86EMUL_PROPAGATE_FAULT
) {
2714 kvm_inject_gp(vcpu
, 0);
2717 if (ret
== 0 && pio_dev
) {
2718 pio_string_write(pio_dev
, vcpu
);
2720 if (vcpu
->arch
.pio
.count
== 0)
2724 pr_unimpl(vcpu
, "no string pio read support yet, "
2725 "port %x size %d count %ld\n",
2730 EXPORT_SYMBOL_GPL(kvm_emulate_pio_string
);
2732 static void bounce_off(void *info
)
2737 static unsigned int ref_freq
;
2738 static unsigned long tsc_khz_ref
;
2740 static int kvmclock_cpufreq_notifier(struct notifier_block
*nb
, unsigned long val
,
2743 struct cpufreq_freqs
*freq
= data
;
2745 struct kvm_vcpu
*vcpu
;
2746 int i
, send_ipi
= 0;
2749 ref_freq
= freq
->old
;
2751 if (val
== CPUFREQ_PRECHANGE
&& freq
->old
> freq
->new)
2753 if (val
== CPUFREQ_POSTCHANGE
&& freq
->old
< freq
->new)
2755 per_cpu(cpu_tsc_khz
, freq
->cpu
) = cpufreq_scale(tsc_khz_ref
, ref_freq
, freq
->new);
2757 spin_lock(&kvm_lock
);
2758 list_for_each_entry(kvm
, &vm_list
, vm_list
) {
2759 for (i
= 0; i
< KVM_MAX_VCPUS
; ++i
) {
2760 vcpu
= kvm
->vcpus
[i
];
2763 if (vcpu
->cpu
!= freq
->cpu
)
2765 if (!kvm_request_guest_time_update(vcpu
))
2767 if (vcpu
->cpu
!= smp_processor_id())
2771 spin_unlock(&kvm_lock
);
2773 if (freq
->old
< freq
->new && send_ipi
) {
2775 * We upscale the frequency. Must make the guest
2776 * doesn't see old kvmclock values while running with
2777 * the new frequency, otherwise we risk the guest sees
2778 * time go backwards.
2780 * In case we update the frequency for another cpu
2781 * (which might be in guest context) send an interrupt
2782 * to kick the cpu out of guest context. Next time
2783 * guest context is entered kvmclock will be updated,
2784 * so the guest will not see stale values.
2786 smp_call_function_single(freq
->cpu
, bounce_off
, NULL
, 1);
2791 static struct notifier_block kvmclock_cpufreq_notifier_block
= {
2792 .notifier_call
= kvmclock_cpufreq_notifier
2795 int kvm_arch_init(void *opaque
)
2798 struct kvm_x86_ops
*ops
= (struct kvm_x86_ops
*)opaque
;
2801 printk(KERN_ERR
"kvm: already loaded the other module\n");
2806 if (!ops
->cpu_has_kvm_support()) {
2807 printk(KERN_ERR
"kvm: no hardware support\n");
2811 if (ops
->disabled_by_bios()) {
2812 printk(KERN_ERR
"kvm: disabled by bios\n");
2817 r
= kvm_mmu_module_init();
2821 kvm_init_msr_list();
2824 kvm_mmu_set_nonpresent_ptes(0ull, 0ull);
2825 kvm_mmu_set_base_ptes(PT_PRESENT_MASK
);
2826 kvm_mmu_set_mask_ptes(PT_USER_MASK
, PT_ACCESSED_MASK
,
2827 PT_DIRTY_MASK
, PT64_NX_MASK
, 0);
2829 for_each_possible_cpu(cpu
)
2830 per_cpu(cpu_tsc_khz
, cpu
) = tsc_khz
;
2831 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC
)) {
2832 tsc_khz_ref
= tsc_khz
;
2833 cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block
,
2834 CPUFREQ_TRANSITION_NOTIFIER
);
2843 void kvm_arch_exit(void)
2845 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC
))
2846 cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block
,
2847 CPUFREQ_TRANSITION_NOTIFIER
);
2849 kvm_mmu_module_exit();
2852 int kvm_emulate_halt(struct kvm_vcpu
*vcpu
)
2854 ++vcpu
->stat
.halt_exits
;
2855 KVMTRACE_0D(HLT
, vcpu
, handler
);
2856 if (irqchip_in_kernel(vcpu
->kvm
)) {
2857 vcpu
->arch
.mp_state
= KVM_MP_STATE_HALTED
;
2860 vcpu
->run
->exit_reason
= KVM_EXIT_HLT
;
2864 EXPORT_SYMBOL_GPL(kvm_emulate_halt
);
2866 static inline gpa_t
hc_gpa(struct kvm_vcpu
*vcpu
, unsigned long a0
,
2869 if (is_long_mode(vcpu
))
2872 return a0
| ((gpa_t
)a1
<< 32);
2875 int kvm_emulate_hypercall(struct kvm_vcpu
*vcpu
)
2877 unsigned long nr
, a0
, a1
, a2
, a3
, ret
;
2880 nr
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
2881 a0
= kvm_register_read(vcpu
, VCPU_REGS_RBX
);
2882 a1
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
2883 a2
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
2884 a3
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
2886 KVMTRACE_1D(VMMCALL
, vcpu
, (u32
)nr
, handler
);
2888 if (!is_long_mode(vcpu
)) {
2897 case KVM_HC_VAPIC_POLL_IRQ
:
2901 r
= kvm_pv_mmu_op(vcpu
, a0
, hc_gpa(vcpu
, a1
, a2
), &ret
);
2907 kvm_register_write(vcpu
, VCPU_REGS_RAX
, ret
);
2908 ++vcpu
->stat
.hypercalls
;
2911 EXPORT_SYMBOL_GPL(kvm_emulate_hypercall
);
2913 int kvm_fix_hypercall(struct kvm_vcpu
*vcpu
)
2915 char instruction
[3];
2917 unsigned long rip
= kvm_rip_read(vcpu
);
2921 * Blow out the MMU to ensure that no other VCPU has an active mapping
2922 * to ensure that the updated hypercall appears atomically across all
2925 kvm_mmu_zap_all(vcpu
->kvm
);
2927 kvm_x86_ops
->patch_hypercall(vcpu
, instruction
);
2928 if (emulator_write_emulated(rip
, instruction
, 3, vcpu
)
2929 != X86EMUL_CONTINUE
)
2935 static u64
mk_cr_64(u64 curr_cr
, u32 new_val
)
2937 return (curr_cr
& ~((1ULL << 32) - 1)) | new_val
;
2940 void realmode_lgdt(struct kvm_vcpu
*vcpu
, u16 limit
, unsigned long base
)
2942 struct descriptor_table dt
= { limit
, base
};
2944 kvm_x86_ops
->set_gdt(vcpu
, &dt
);
2947 void realmode_lidt(struct kvm_vcpu
*vcpu
, u16 limit
, unsigned long base
)
2949 struct descriptor_table dt
= { limit
, base
};
2951 kvm_x86_ops
->set_idt(vcpu
, &dt
);
2954 void realmode_lmsw(struct kvm_vcpu
*vcpu
, unsigned long msw
,
2955 unsigned long *rflags
)
2957 kvm_lmsw(vcpu
, msw
);
2958 *rflags
= kvm_x86_ops
->get_rflags(vcpu
);
2961 unsigned long realmode_get_cr(struct kvm_vcpu
*vcpu
, int cr
)
2963 unsigned long value
;
2965 kvm_x86_ops
->decache_cr4_guest_bits(vcpu
);
2968 value
= vcpu
->arch
.cr0
;
2971 value
= vcpu
->arch
.cr2
;
2974 value
= vcpu
->arch
.cr3
;
2977 value
= vcpu
->arch
.cr4
;
2980 value
= kvm_get_cr8(vcpu
);
2983 vcpu_printf(vcpu
, "%s: unexpected cr %u\n", __func__
, cr
);
2986 KVMTRACE_3D(CR_READ
, vcpu
, (u32
)cr
, (u32
)value
,
2987 (u32
)((u64
)value
>> 32), handler
);
2992 void realmode_set_cr(struct kvm_vcpu
*vcpu
, int cr
, unsigned long val
,
2993 unsigned long *rflags
)
2995 KVMTRACE_3D(CR_WRITE
, vcpu
, (u32
)cr
, (u32
)val
,
2996 (u32
)((u64
)val
>> 32), handler
);
3000 kvm_set_cr0(vcpu
, mk_cr_64(vcpu
->arch
.cr0
, val
));
3001 *rflags
= kvm_x86_ops
->get_rflags(vcpu
);
3004 vcpu
->arch
.cr2
= val
;
3007 kvm_set_cr3(vcpu
, val
);
3010 kvm_set_cr4(vcpu
, mk_cr_64(vcpu
->arch
.cr4
, val
));
3013 kvm_set_cr8(vcpu
, val
& 0xfUL
);
3016 vcpu_printf(vcpu
, "%s: unexpected cr %u\n", __func__
, cr
);
3020 static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu
*vcpu
, int i
)
3022 struct kvm_cpuid_entry2
*e
= &vcpu
->arch
.cpuid_entries
[i
];
3023 int j
, nent
= vcpu
->arch
.cpuid_nent
;
3025 e
->flags
&= ~KVM_CPUID_FLAG_STATE_READ_NEXT
;
3026 /* when no next entry is found, the current entry[i] is reselected */
3027 for (j
= i
+ 1; ; j
= (j
+ 1) % nent
) {
3028 struct kvm_cpuid_entry2
*ej
= &vcpu
->arch
.cpuid_entries
[j
];
3029 if (ej
->function
== e
->function
) {
3030 ej
->flags
|= KVM_CPUID_FLAG_STATE_READ_NEXT
;
3034 return 0; /* silence gcc, even though control never reaches here */
3037 /* find an entry with matching function, matching index (if needed), and that
3038 * should be read next (if it's stateful) */
3039 static int is_matching_cpuid_entry(struct kvm_cpuid_entry2
*e
,
3040 u32 function
, u32 index
)
3042 if (e
->function
!= function
)
3044 if ((e
->flags
& KVM_CPUID_FLAG_SIGNIFCANT_INDEX
) && e
->index
!= index
)
3046 if ((e
->flags
& KVM_CPUID_FLAG_STATEFUL_FUNC
) &&
3047 !(e
->flags
& KVM_CPUID_FLAG_STATE_READ_NEXT
))
3052 struct kvm_cpuid_entry2
*kvm_find_cpuid_entry(struct kvm_vcpu
*vcpu
,
3053 u32 function
, u32 index
)
3056 struct kvm_cpuid_entry2
*best
= NULL
;
3058 for (i
= 0; i
< vcpu
->arch
.cpuid_nent
; ++i
) {
3059 struct kvm_cpuid_entry2
*e
;
3061 e
= &vcpu
->arch
.cpuid_entries
[i
];
3062 if (is_matching_cpuid_entry(e
, function
, index
)) {
3063 if (e
->flags
& KVM_CPUID_FLAG_STATEFUL_FUNC
)
3064 move_to_next_stateful_cpuid_entry(vcpu
, i
);
3069 * Both basic or both extended?
3071 if (((e
->function
^ function
) & 0x80000000) == 0)
3072 if (!best
|| e
->function
> best
->function
)
3078 int cpuid_maxphyaddr(struct kvm_vcpu
*vcpu
)
3080 struct kvm_cpuid_entry2
*best
;
3082 best
= kvm_find_cpuid_entry(vcpu
, 0x80000008, 0);
3084 return best
->eax
& 0xff;
3088 void kvm_emulate_cpuid(struct kvm_vcpu
*vcpu
)
3090 u32 function
, index
;
3091 struct kvm_cpuid_entry2
*best
;
3093 function
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
3094 index
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
3095 kvm_register_write(vcpu
, VCPU_REGS_RAX
, 0);
3096 kvm_register_write(vcpu
, VCPU_REGS_RBX
, 0);
3097 kvm_register_write(vcpu
, VCPU_REGS_RCX
, 0);
3098 kvm_register_write(vcpu
, VCPU_REGS_RDX
, 0);
3099 best
= kvm_find_cpuid_entry(vcpu
, function
, index
);
3101 kvm_register_write(vcpu
, VCPU_REGS_RAX
, best
->eax
);
3102 kvm_register_write(vcpu
, VCPU_REGS_RBX
, best
->ebx
);
3103 kvm_register_write(vcpu
, VCPU_REGS_RCX
, best
->ecx
);
3104 kvm_register_write(vcpu
, VCPU_REGS_RDX
, best
->edx
);
3106 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
3107 KVMTRACE_5D(CPUID
, vcpu
, function
,
3108 (u32
)kvm_register_read(vcpu
, VCPU_REGS_RAX
),
3109 (u32
)kvm_register_read(vcpu
, VCPU_REGS_RBX
),
3110 (u32
)kvm_register_read(vcpu
, VCPU_REGS_RCX
),
3111 (u32
)kvm_register_read(vcpu
, VCPU_REGS_RDX
), handler
);
3113 EXPORT_SYMBOL_GPL(kvm_emulate_cpuid
);
3116 * Check if userspace requested an interrupt window, and that the
3117 * interrupt window is open.
3119 * No need to exit to userspace if we already have an interrupt queued.
3121 static int dm_request_for_irq_injection(struct kvm_vcpu
*vcpu
,
3122 struct kvm_run
*kvm_run
)
3124 return (!irqchip_in_kernel(vcpu
->kvm
) && !kvm_cpu_has_interrupt(vcpu
) &&
3125 kvm_run
->request_interrupt_window
&&
3126 kvm_arch_interrupt_allowed(vcpu
));
3129 static void post_kvm_run_save(struct kvm_vcpu
*vcpu
,
3130 struct kvm_run
*kvm_run
)
3132 kvm_run
->if_flag
= (kvm_x86_ops
->get_rflags(vcpu
) & X86_EFLAGS_IF
) != 0;
3133 kvm_run
->cr8
= kvm_get_cr8(vcpu
);
3134 kvm_run
->apic_base
= kvm_get_apic_base(vcpu
);
3135 if (irqchip_in_kernel(vcpu
->kvm
))
3136 kvm_run
->ready_for_interrupt_injection
= 1;
3138 kvm_run
->ready_for_interrupt_injection
=
3139 kvm_arch_interrupt_allowed(vcpu
) &&
3140 !kvm_cpu_has_interrupt(vcpu
) &&
3141 !kvm_event_needs_reinjection(vcpu
);
3144 static void vapic_enter(struct kvm_vcpu
*vcpu
)
3146 struct kvm_lapic
*apic
= vcpu
->arch
.apic
;
3149 if (!apic
|| !apic
->vapic_addr
)
3152 page
= gfn_to_page(vcpu
->kvm
, apic
->vapic_addr
>> PAGE_SHIFT
);
3154 vcpu
->arch
.apic
->vapic_page
= page
;
3157 static void vapic_exit(struct kvm_vcpu
*vcpu
)
3159 struct kvm_lapic
*apic
= vcpu
->arch
.apic
;
3161 if (!apic
|| !apic
->vapic_addr
)
3164 down_read(&vcpu
->kvm
->slots_lock
);
3165 kvm_release_page_dirty(apic
->vapic_page
);
3166 mark_page_dirty(vcpu
->kvm
, apic
->vapic_addr
>> PAGE_SHIFT
);
3167 up_read(&vcpu
->kvm
->slots_lock
);
3170 static void update_cr8_intercept(struct kvm_vcpu
*vcpu
)
3174 if (!kvm_x86_ops
->update_cr8_intercept
)
3177 if (!vcpu
->arch
.apic
->vapic_addr
)
3178 max_irr
= kvm_lapic_find_highest_irr(vcpu
);
3185 tpr
= kvm_lapic_get_cr8(vcpu
);
3187 kvm_x86_ops
->update_cr8_intercept(vcpu
, tpr
, max_irr
);
3190 static void inject_pending_irq(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
3192 if (vcpu
->guest_debug
& KVM_GUESTDBG_SINGLESTEP
)
3193 kvm_x86_ops
->set_interrupt_shadow(vcpu
, 0);
3195 /* try to reinject previous events if any */
3196 if (vcpu
->arch
.nmi_injected
) {
3197 kvm_x86_ops
->set_nmi(vcpu
);
3201 if (vcpu
->arch
.interrupt
.pending
) {
3202 kvm_x86_ops
->set_irq(vcpu
);
3206 /* try to inject new event if pending */
3207 if (vcpu
->arch
.nmi_pending
) {
3208 if (kvm_x86_ops
->nmi_allowed(vcpu
)) {
3209 vcpu
->arch
.nmi_pending
= false;
3210 vcpu
->arch
.nmi_injected
= true;
3211 kvm_x86_ops
->set_nmi(vcpu
);
3213 } else if (kvm_cpu_has_interrupt(vcpu
)) {
3214 if (kvm_x86_ops
->interrupt_allowed(vcpu
)) {
3215 kvm_queue_interrupt(vcpu
, kvm_cpu_get_interrupt(vcpu
),
3217 kvm_x86_ops
->set_irq(vcpu
);
3222 static int vcpu_enter_guest(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
3225 bool req_int_win
= !irqchip_in_kernel(vcpu
->kvm
) &&
3226 kvm_run
->request_interrupt_window
;
3229 if (test_and_clear_bit(KVM_REQ_MMU_RELOAD
, &vcpu
->requests
))
3230 kvm_mmu_unload(vcpu
);
3232 r
= kvm_mmu_reload(vcpu
);
3236 if (vcpu
->requests
) {
3237 if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER
, &vcpu
->requests
))
3238 __kvm_migrate_timers(vcpu
);
3239 if (test_and_clear_bit(KVM_REQ_KVMCLOCK_UPDATE
, &vcpu
->requests
))
3240 kvm_write_guest_time(vcpu
);
3241 if (test_and_clear_bit(KVM_REQ_MMU_SYNC
, &vcpu
->requests
))
3242 kvm_mmu_sync_roots(vcpu
);
3243 if (test_and_clear_bit(KVM_REQ_TLB_FLUSH
, &vcpu
->requests
))
3244 kvm_x86_ops
->tlb_flush(vcpu
);
3245 if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS
,
3247 kvm_run
->exit_reason
= KVM_EXIT_TPR_ACCESS
;
3251 if (test_and_clear_bit(KVM_REQ_TRIPLE_FAULT
, &vcpu
->requests
)) {
3252 kvm_run
->exit_reason
= KVM_EXIT_SHUTDOWN
;
3260 kvm_x86_ops
->prepare_guest_switch(vcpu
);
3261 kvm_load_guest_fpu(vcpu
);
3263 local_irq_disable();
3265 clear_bit(KVM_REQ_KICK
, &vcpu
->requests
);
3266 smp_mb__after_clear_bit();
3268 if (vcpu
->requests
|| need_resched() || signal_pending(current
)) {
3275 if (vcpu
->arch
.exception
.pending
)
3276 __queue_exception(vcpu
);
3278 inject_pending_irq(vcpu
, kvm_run
);
3280 /* enable NMI/IRQ window open exits if needed */
3281 if (vcpu
->arch
.nmi_pending
)
3282 kvm_x86_ops
->enable_nmi_window(vcpu
);
3283 else if (kvm_cpu_has_interrupt(vcpu
) || req_int_win
)
3284 kvm_x86_ops
->enable_irq_window(vcpu
);
3286 if (kvm_lapic_enabled(vcpu
)) {
3287 update_cr8_intercept(vcpu
);
3288 kvm_lapic_sync_to_vapic(vcpu
);
3291 up_read(&vcpu
->kvm
->slots_lock
);
3295 get_debugreg(vcpu
->arch
.host_dr6
, 6);
3296 get_debugreg(vcpu
->arch
.host_dr7
, 7);
3297 if (unlikely(vcpu
->arch
.switch_db_regs
)) {
3298 get_debugreg(vcpu
->arch
.host_db
[0], 0);
3299 get_debugreg(vcpu
->arch
.host_db
[1], 1);
3300 get_debugreg(vcpu
->arch
.host_db
[2], 2);
3301 get_debugreg(vcpu
->arch
.host_db
[3], 3);
3304 set_debugreg(vcpu
->arch
.eff_db
[0], 0);
3305 set_debugreg(vcpu
->arch
.eff_db
[1], 1);
3306 set_debugreg(vcpu
->arch
.eff_db
[2], 2);
3307 set_debugreg(vcpu
->arch
.eff_db
[3], 3);
3310 KVMTRACE_0D(VMENTRY
, vcpu
, entryexit
);
3311 kvm_x86_ops
->run(vcpu
, kvm_run
);
3313 if (unlikely(vcpu
->arch
.switch_db_regs
)) {
3315 set_debugreg(vcpu
->arch
.host_db
[0], 0);
3316 set_debugreg(vcpu
->arch
.host_db
[1], 1);
3317 set_debugreg(vcpu
->arch
.host_db
[2], 2);
3318 set_debugreg(vcpu
->arch
.host_db
[3], 3);
3320 set_debugreg(vcpu
->arch
.host_dr6
, 6);
3321 set_debugreg(vcpu
->arch
.host_dr7
, 7);
3323 set_bit(KVM_REQ_KICK
, &vcpu
->requests
);
3329 * We must have an instruction between local_irq_enable() and
3330 * kvm_guest_exit(), so the timer interrupt isn't delayed by
3331 * the interrupt shadow. The stat.exits increment will do nicely.
3332 * But we need to prevent reordering, hence this barrier():
3340 down_read(&vcpu
->kvm
->slots_lock
);
3343 * Profile KVM exit RIPs:
3345 if (unlikely(prof_on
== KVM_PROFILING
)) {
3346 unsigned long rip
= kvm_rip_read(vcpu
);
3347 profile_hit(KVM_PROFILING
, (void *)rip
);
3351 kvm_lapic_sync_from_vapic(vcpu
);
3353 r
= kvm_x86_ops
->handle_exit(kvm_run
, vcpu
);
3359 static int __vcpu_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
3363 if (unlikely(vcpu
->arch
.mp_state
== KVM_MP_STATE_SIPI_RECEIVED
)) {
3364 pr_debug("vcpu %d received sipi with vector # %x\n",
3365 vcpu
->vcpu_id
, vcpu
->arch
.sipi_vector
);
3366 kvm_lapic_reset(vcpu
);
3367 r
= kvm_arch_vcpu_reset(vcpu
);
3370 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
3373 down_read(&vcpu
->kvm
->slots_lock
);
3378 if (vcpu
->arch
.mp_state
== KVM_MP_STATE_RUNNABLE
)
3379 r
= vcpu_enter_guest(vcpu
, kvm_run
);
3381 up_read(&vcpu
->kvm
->slots_lock
);
3382 kvm_vcpu_block(vcpu
);
3383 down_read(&vcpu
->kvm
->slots_lock
);
3384 if (test_and_clear_bit(KVM_REQ_UNHALT
, &vcpu
->requests
))
3386 switch(vcpu
->arch
.mp_state
) {
3387 case KVM_MP_STATE_HALTED
:
3388 vcpu
->arch
.mp_state
=
3389 KVM_MP_STATE_RUNNABLE
;
3390 case KVM_MP_STATE_RUNNABLE
:
3392 case KVM_MP_STATE_SIPI_RECEIVED
:
3403 clear_bit(KVM_REQ_PENDING_TIMER
, &vcpu
->requests
);
3404 if (kvm_cpu_has_pending_timer(vcpu
))
3405 kvm_inject_pending_timer_irqs(vcpu
);
3407 if (dm_request_for_irq_injection(vcpu
, kvm_run
)) {
3409 kvm_run
->exit_reason
= KVM_EXIT_INTR
;
3410 ++vcpu
->stat
.request_irq_exits
;
3412 if (signal_pending(current
)) {
3414 kvm_run
->exit_reason
= KVM_EXIT_INTR
;
3415 ++vcpu
->stat
.signal_exits
;
3417 if (need_resched()) {
3418 up_read(&vcpu
->kvm
->slots_lock
);
3420 down_read(&vcpu
->kvm
->slots_lock
);
3424 up_read(&vcpu
->kvm
->slots_lock
);
3425 post_kvm_run_save(vcpu
, kvm_run
);
3432 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
3439 if (vcpu
->sigset_active
)
3440 sigprocmask(SIG_SETMASK
, &vcpu
->sigset
, &sigsaved
);
3442 if (unlikely(vcpu
->arch
.mp_state
== KVM_MP_STATE_UNINITIALIZED
)) {
3443 kvm_vcpu_block(vcpu
);
3444 clear_bit(KVM_REQ_UNHALT
, &vcpu
->requests
);
3449 /* re-sync apic's tpr */
3450 if (!irqchip_in_kernel(vcpu
->kvm
))
3451 kvm_set_cr8(vcpu
, kvm_run
->cr8
);
3453 if (vcpu
->arch
.pio
.cur_count
) {
3454 r
= complete_pio(vcpu
);
3458 #if CONFIG_HAS_IOMEM
3459 if (vcpu
->mmio_needed
) {
3460 memcpy(vcpu
->mmio_data
, kvm_run
->mmio
.data
, 8);
3461 vcpu
->mmio_read_completed
= 1;
3462 vcpu
->mmio_needed
= 0;
3464 down_read(&vcpu
->kvm
->slots_lock
);
3465 r
= emulate_instruction(vcpu
, kvm_run
,
3466 vcpu
->arch
.mmio_fault_cr2
, 0,
3467 EMULTYPE_NO_DECODE
);
3468 up_read(&vcpu
->kvm
->slots_lock
);
3469 if (r
== EMULATE_DO_MMIO
) {
3471 * Read-modify-write. Back to userspace.
3478 if (kvm_run
->exit_reason
== KVM_EXIT_HYPERCALL
)
3479 kvm_register_write(vcpu
, VCPU_REGS_RAX
,
3480 kvm_run
->hypercall
.ret
);
3482 r
= __vcpu_run(vcpu
, kvm_run
);
3485 if (vcpu
->sigset_active
)
3486 sigprocmask(SIG_SETMASK
, &sigsaved
, NULL
);
3492 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
)
3496 regs
->rax
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
3497 regs
->rbx
= kvm_register_read(vcpu
, VCPU_REGS_RBX
);
3498 regs
->rcx
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
3499 regs
->rdx
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
3500 regs
->rsi
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
3501 regs
->rdi
= kvm_register_read(vcpu
, VCPU_REGS_RDI
);
3502 regs
->rsp
= kvm_register_read(vcpu
, VCPU_REGS_RSP
);
3503 regs
->rbp
= kvm_register_read(vcpu
, VCPU_REGS_RBP
);
3504 #ifdef CONFIG_X86_64
3505 regs
->r8
= kvm_register_read(vcpu
, VCPU_REGS_R8
);
3506 regs
->r9
= kvm_register_read(vcpu
, VCPU_REGS_R9
);
3507 regs
->r10
= kvm_register_read(vcpu
, VCPU_REGS_R10
);
3508 regs
->r11
= kvm_register_read(vcpu
, VCPU_REGS_R11
);
3509 regs
->r12
= kvm_register_read(vcpu
, VCPU_REGS_R12
);
3510 regs
->r13
= kvm_register_read(vcpu
, VCPU_REGS_R13
);
3511 regs
->r14
= kvm_register_read(vcpu
, VCPU_REGS_R14
);
3512 regs
->r15
= kvm_register_read(vcpu
, VCPU_REGS_R15
);
3515 regs
->rip
= kvm_rip_read(vcpu
);
3516 regs
->rflags
= kvm_x86_ops
->get_rflags(vcpu
);
3519 * Don't leak debug flags in case they were set for guest debugging
3521 if (vcpu
->guest_debug
& KVM_GUESTDBG_SINGLESTEP
)
3522 regs
->rflags
&= ~(X86_EFLAGS_TF
| X86_EFLAGS_RF
);
3529 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
)
3533 kvm_register_write(vcpu
, VCPU_REGS_RAX
, regs
->rax
);
3534 kvm_register_write(vcpu
, VCPU_REGS_RBX
, regs
->rbx
);
3535 kvm_register_write(vcpu
, VCPU_REGS_RCX
, regs
->rcx
);
3536 kvm_register_write(vcpu
, VCPU_REGS_RDX
, regs
->rdx
);
3537 kvm_register_write(vcpu
, VCPU_REGS_RSI
, regs
->rsi
);
3538 kvm_register_write(vcpu
, VCPU_REGS_RDI
, regs
->rdi
);
3539 kvm_register_write(vcpu
, VCPU_REGS_RSP
, regs
->rsp
);
3540 kvm_register_write(vcpu
, VCPU_REGS_RBP
, regs
->rbp
);
3541 #ifdef CONFIG_X86_64
3542 kvm_register_write(vcpu
, VCPU_REGS_R8
, regs
->r8
);
3543 kvm_register_write(vcpu
, VCPU_REGS_R9
, regs
->r9
);
3544 kvm_register_write(vcpu
, VCPU_REGS_R10
, regs
->r10
);
3545 kvm_register_write(vcpu
, VCPU_REGS_R11
, regs
->r11
);
3546 kvm_register_write(vcpu
, VCPU_REGS_R12
, regs
->r12
);
3547 kvm_register_write(vcpu
, VCPU_REGS_R13
, regs
->r13
);
3548 kvm_register_write(vcpu
, VCPU_REGS_R14
, regs
->r14
);
3549 kvm_register_write(vcpu
, VCPU_REGS_R15
, regs
->r15
);
3553 kvm_rip_write(vcpu
, regs
->rip
);
3554 kvm_x86_ops
->set_rflags(vcpu
, regs
->rflags
);
3557 vcpu
->arch
.exception
.pending
= false;
3564 void kvm_get_segment(struct kvm_vcpu
*vcpu
,
3565 struct kvm_segment
*var
, int seg
)
3567 kvm_x86_ops
->get_segment(vcpu
, var
, seg
);
3570 void kvm_get_cs_db_l_bits(struct kvm_vcpu
*vcpu
, int *db
, int *l
)
3572 struct kvm_segment cs
;
3574 kvm_get_segment(vcpu
, &cs
, VCPU_SREG_CS
);
3578 EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits
);
3580 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
3581 struct kvm_sregs
*sregs
)
3583 struct descriptor_table dt
;
3587 kvm_get_segment(vcpu
, &sregs
->cs
, VCPU_SREG_CS
);
3588 kvm_get_segment(vcpu
, &sregs
->ds
, VCPU_SREG_DS
);
3589 kvm_get_segment(vcpu
, &sregs
->es
, VCPU_SREG_ES
);
3590 kvm_get_segment(vcpu
, &sregs
->fs
, VCPU_SREG_FS
);
3591 kvm_get_segment(vcpu
, &sregs
->gs
, VCPU_SREG_GS
);
3592 kvm_get_segment(vcpu
, &sregs
->ss
, VCPU_SREG_SS
);
3594 kvm_get_segment(vcpu
, &sregs
->tr
, VCPU_SREG_TR
);
3595 kvm_get_segment(vcpu
, &sregs
->ldt
, VCPU_SREG_LDTR
);
3597 kvm_x86_ops
->get_idt(vcpu
, &dt
);
3598 sregs
->idt
.limit
= dt
.limit
;
3599 sregs
->idt
.base
= dt
.base
;
3600 kvm_x86_ops
->get_gdt(vcpu
, &dt
);
3601 sregs
->gdt
.limit
= dt
.limit
;
3602 sregs
->gdt
.base
= dt
.base
;
3604 kvm_x86_ops
->decache_cr4_guest_bits(vcpu
);
3605 sregs
->cr0
= vcpu
->arch
.cr0
;
3606 sregs
->cr2
= vcpu
->arch
.cr2
;
3607 sregs
->cr3
= vcpu
->arch
.cr3
;
3608 sregs
->cr4
= vcpu
->arch
.cr4
;
3609 sregs
->cr8
= kvm_get_cr8(vcpu
);
3610 sregs
->efer
= vcpu
->arch
.shadow_efer
;
3611 sregs
->apic_base
= kvm_get_apic_base(vcpu
);
3613 memset(sregs
->interrupt_bitmap
, 0, sizeof sregs
->interrupt_bitmap
);
3615 if (vcpu
->arch
.interrupt
.pending
&& !vcpu
->arch
.interrupt
.soft
)
3616 set_bit(vcpu
->arch
.interrupt
.nr
,
3617 (unsigned long *)sregs
->interrupt_bitmap
);
3624 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
3625 struct kvm_mp_state
*mp_state
)
3628 mp_state
->mp_state
= vcpu
->arch
.mp_state
;
3633 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
3634 struct kvm_mp_state
*mp_state
)
3637 vcpu
->arch
.mp_state
= mp_state
->mp_state
;
3642 static void kvm_set_segment(struct kvm_vcpu
*vcpu
,
3643 struct kvm_segment
*var
, int seg
)
3645 kvm_x86_ops
->set_segment(vcpu
, var
, seg
);
3648 static void seg_desct_to_kvm_desct(struct desc_struct
*seg_desc
, u16 selector
,
3649 struct kvm_segment
*kvm_desct
)
3651 kvm_desct
->base
= seg_desc
->base0
;
3652 kvm_desct
->base
|= seg_desc
->base1
<< 16;
3653 kvm_desct
->base
|= seg_desc
->base2
<< 24;
3654 kvm_desct
->limit
= seg_desc
->limit0
;
3655 kvm_desct
->limit
|= seg_desc
->limit
<< 16;
3657 kvm_desct
->limit
<<= 12;
3658 kvm_desct
->limit
|= 0xfff;
3660 kvm_desct
->selector
= selector
;
3661 kvm_desct
->type
= seg_desc
->type
;
3662 kvm_desct
->present
= seg_desc
->p
;
3663 kvm_desct
->dpl
= seg_desc
->dpl
;
3664 kvm_desct
->db
= seg_desc
->d
;
3665 kvm_desct
->s
= seg_desc
->s
;
3666 kvm_desct
->l
= seg_desc
->l
;
3667 kvm_desct
->g
= seg_desc
->g
;
3668 kvm_desct
->avl
= seg_desc
->avl
;
3670 kvm_desct
->unusable
= 1;
3672 kvm_desct
->unusable
= 0;
3673 kvm_desct
->padding
= 0;
3676 static void get_segment_descriptor_dtable(struct kvm_vcpu
*vcpu
,
3678 struct descriptor_table
*dtable
)
3680 if (selector
& 1 << 2) {
3681 struct kvm_segment kvm_seg
;
3683 kvm_get_segment(vcpu
, &kvm_seg
, VCPU_SREG_LDTR
);
3685 if (kvm_seg
.unusable
)
3688 dtable
->limit
= kvm_seg
.limit
;
3689 dtable
->base
= kvm_seg
.base
;
3692 kvm_x86_ops
->get_gdt(vcpu
, dtable
);
3695 /* allowed just for 8 bytes segments */
3696 static int load_guest_segment_descriptor(struct kvm_vcpu
*vcpu
, u16 selector
,
3697 struct desc_struct
*seg_desc
)
3700 struct descriptor_table dtable
;
3701 u16 index
= selector
>> 3;
3703 get_segment_descriptor_dtable(vcpu
, selector
, &dtable
);
3705 if (dtable
.limit
< index
* 8 + 7) {
3706 kvm_queue_exception_e(vcpu
, GP_VECTOR
, selector
& 0xfffc);
3709 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, dtable
.base
);
3711 return kvm_read_guest(vcpu
->kvm
, gpa
, seg_desc
, 8);
3714 /* allowed just for 8 bytes segments */
3715 static int save_guest_segment_descriptor(struct kvm_vcpu
*vcpu
, u16 selector
,
3716 struct desc_struct
*seg_desc
)
3719 struct descriptor_table dtable
;
3720 u16 index
= selector
>> 3;
3722 get_segment_descriptor_dtable(vcpu
, selector
, &dtable
);
3724 if (dtable
.limit
< index
* 8 + 7)
3726 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, dtable
.base
);
3728 return kvm_write_guest(vcpu
->kvm
, gpa
, seg_desc
, 8);
3731 static u32
get_tss_base_addr(struct kvm_vcpu
*vcpu
,
3732 struct desc_struct
*seg_desc
)
3736 base_addr
= seg_desc
->base0
;
3737 base_addr
|= (seg_desc
->base1
<< 16);
3738 base_addr
|= (seg_desc
->base2
<< 24);
3740 return vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, base_addr
);
3743 static u16
get_segment_selector(struct kvm_vcpu
*vcpu
, int seg
)
3745 struct kvm_segment kvm_seg
;
3747 kvm_get_segment(vcpu
, &kvm_seg
, seg
);
3748 return kvm_seg
.selector
;
3751 static int load_segment_descriptor_to_kvm_desct(struct kvm_vcpu
*vcpu
,
3753 struct kvm_segment
*kvm_seg
)
3755 struct desc_struct seg_desc
;
3757 if (load_guest_segment_descriptor(vcpu
, selector
, &seg_desc
))
3759 seg_desct_to_kvm_desct(&seg_desc
, selector
, kvm_seg
);
3763 static int kvm_load_realmode_segment(struct kvm_vcpu
*vcpu
, u16 selector
, int seg
)
3765 struct kvm_segment segvar
= {
3766 .base
= selector
<< 4,
3768 .selector
= selector
,
3779 kvm_x86_ops
->set_segment(vcpu
, &segvar
, seg
);
3783 int kvm_load_segment_descriptor(struct kvm_vcpu
*vcpu
, u16 selector
,
3784 int type_bits
, int seg
)
3786 struct kvm_segment kvm_seg
;
3788 if (!(vcpu
->arch
.cr0
& X86_CR0_PE
))
3789 return kvm_load_realmode_segment(vcpu
, selector
, seg
);
3790 if (load_segment_descriptor_to_kvm_desct(vcpu
, selector
, &kvm_seg
))
3792 kvm_seg
.type
|= type_bits
;
3794 if (seg
!= VCPU_SREG_SS
&& seg
!= VCPU_SREG_CS
&&
3795 seg
!= VCPU_SREG_LDTR
)
3797 kvm_seg
.unusable
= 1;
3799 kvm_set_segment(vcpu
, &kvm_seg
, seg
);
3803 static void save_state_to_tss32(struct kvm_vcpu
*vcpu
,
3804 struct tss_segment_32
*tss
)
3806 tss
->cr3
= vcpu
->arch
.cr3
;
3807 tss
->eip
= kvm_rip_read(vcpu
);
3808 tss
->eflags
= kvm_x86_ops
->get_rflags(vcpu
);
3809 tss
->eax
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
3810 tss
->ecx
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
3811 tss
->edx
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
3812 tss
->ebx
= kvm_register_read(vcpu
, VCPU_REGS_RBX
);
3813 tss
->esp
= kvm_register_read(vcpu
, VCPU_REGS_RSP
);
3814 tss
->ebp
= kvm_register_read(vcpu
, VCPU_REGS_RBP
);
3815 tss
->esi
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
3816 tss
->edi
= kvm_register_read(vcpu
, VCPU_REGS_RDI
);
3817 tss
->es
= get_segment_selector(vcpu
, VCPU_SREG_ES
);
3818 tss
->cs
= get_segment_selector(vcpu
, VCPU_SREG_CS
);
3819 tss
->ss
= get_segment_selector(vcpu
, VCPU_SREG_SS
);
3820 tss
->ds
= get_segment_selector(vcpu
, VCPU_SREG_DS
);
3821 tss
->fs
= get_segment_selector(vcpu
, VCPU_SREG_FS
);
3822 tss
->gs
= get_segment_selector(vcpu
, VCPU_SREG_GS
);
3823 tss
->ldt_selector
= get_segment_selector(vcpu
, VCPU_SREG_LDTR
);
3826 static int load_state_from_tss32(struct kvm_vcpu
*vcpu
,
3827 struct tss_segment_32
*tss
)
3829 kvm_set_cr3(vcpu
, tss
->cr3
);
3831 kvm_rip_write(vcpu
, tss
->eip
);
3832 kvm_x86_ops
->set_rflags(vcpu
, tss
->eflags
| 2);
3834 kvm_register_write(vcpu
, VCPU_REGS_RAX
, tss
->eax
);
3835 kvm_register_write(vcpu
, VCPU_REGS_RCX
, tss
->ecx
);
3836 kvm_register_write(vcpu
, VCPU_REGS_RDX
, tss
->edx
);
3837 kvm_register_write(vcpu
, VCPU_REGS_RBX
, tss
->ebx
);
3838 kvm_register_write(vcpu
, VCPU_REGS_RSP
, tss
->esp
);
3839 kvm_register_write(vcpu
, VCPU_REGS_RBP
, tss
->ebp
);
3840 kvm_register_write(vcpu
, VCPU_REGS_RSI
, tss
->esi
);
3841 kvm_register_write(vcpu
, VCPU_REGS_RDI
, tss
->edi
);
3843 if (kvm_load_segment_descriptor(vcpu
, tss
->ldt_selector
, 0, VCPU_SREG_LDTR
))
3846 if (kvm_load_segment_descriptor(vcpu
, tss
->es
, 1, VCPU_SREG_ES
))
3849 if (kvm_load_segment_descriptor(vcpu
, tss
->cs
, 9, VCPU_SREG_CS
))
3852 if (kvm_load_segment_descriptor(vcpu
, tss
->ss
, 1, VCPU_SREG_SS
))
3855 if (kvm_load_segment_descriptor(vcpu
, tss
->ds
, 1, VCPU_SREG_DS
))
3858 if (kvm_load_segment_descriptor(vcpu
, tss
->fs
, 1, VCPU_SREG_FS
))
3861 if (kvm_load_segment_descriptor(vcpu
, tss
->gs
, 1, VCPU_SREG_GS
))
3866 static void save_state_to_tss16(struct kvm_vcpu
*vcpu
,
3867 struct tss_segment_16
*tss
)
3869 tss
->ip
= kvm_rip_read(vcpu
);
3870 tss
->flag
= kvm_x86_ops
->get_rflags(vcpu
);
3871 tss
->ax
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
3872 tss
->cx
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
3873 tss
->dx
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
3874 tss
->bx
= kvm_register_read(vcpu
, VCPU_REGS_RBX
);
3875 tss
->sp
= kvm_register_read(vcpu
, VCPU_REGS_RSP
);
3876 tss
->bp
= kvm_register_read(vcpu
, VCPU_REGS_RBP
);
3877 tss
->si
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
3878 tss
->di
= kvm_register_read(vcpu
, VCPU_REGS_RDI
);
3880 tss
->es
= get_segment_selector(vcpu
, VCPU_SREG_ES
);
3881 tss
->cs
= get_segment_selector(vcpu
, VCPU_SREG_CS
);
3882 tss
->ss
= get_segment_selector(vcpu
, VCPU_SREG_SS
);
3883 tss
->ds
= get_segment_selector(vcpu
, VCPU_SREG_DS
);
3884 tss
->ldt
= get_segment_selector(vcpu
, VCPU_SREG_LDTR
);
3885 tss
->prev_task_link
= get_segment_selector(vcpu
, VCPU_SREG_TR
);
3888 static int load_state_from_tss16(struct kvm_vcpu
*vcpu
,
3889 struct tss_segment_16
*tss
)
3891 kvm_rip_write(vcpu
, tss
->ip
);
3892 kvm_x86_ops
->set_rflags(vcpu
, tss
->flag
| 2);
3893 kvm_register_write(vcpu
, VCPU_REGS_RAX
, tss
->ax
);
3894 kvm_register_write(vcpu
, VCPU_REGS_RCX
, tss
->cx
);
3895 kvm_register_write(vcpu
, VCPU_REGS_RDX
, tss
->dx
);
3896 kvm_register_write(vcpu
, VCPU_REGS_RBX
, tss
->bx
);
3897 kvm_register_write(vcpu
, VCPU_REGS_RSP
, tss
->sp
);
3898 kvm_register_write(vcpu
, VCPU_REGS_RBP
, tss
->bp
);
3899 kvm_register_write(vcpu
, VCPU_REGS_RSI
, tss
->si
);
3900 kvm_register_write(vcpu
, VCPU_REGS_RDI
, tss
->di
);
3902 if (kvm_load_segment_descriptor(vcpu
, tss
->ldt
, 0, VCPU_SREG_LDTR
))
3905 if (kvm_load_segment_descriptor(vcpu
, tss
->es
, 1, VCPU_SREG_ES
))
3908 if (kvm_load_segment_descriptor(vcpu
, tss
->cs
, 9, VCPU_SREG_CS
))
3911 if (kvm_load_segment_descriptor(vcpu
, tss
->ss
, 1, VCPU_SREG_SS
))
3914 if (kvm_load_segment_descriptor(vcpu
, tss
->ds
, 1, VCPU_SREG_DS
))
3919 static int kvm_task_switch_16(struct kvm_vcpu
*vcpu
, u16 tss_selector
,
3920 u16 old_tss_sel
, u32 old_tss_base
,
3921 struct desc_struct
*nseg_desc
)
3923 struct tss_segment_16 tss_segment_16
;
3926 if (kvm_read_guest(vcpu
->kvm
, old_tss_base
, &tss_segment_16
,
3927 sizeof tss_segment_16
))
3930 save_state_to_tss16(vcpu
, &tss_segment_16
);
3932 if (kvm_write_guest(vcpu
->kvm
, old_tss_base
, &tss_segment_16
,
3933 sizeof tss_segment_16
))
3936 if (kvm_read_guest(vcpu
->kvm
, get_tss_base_addr(vcpu
, nseg_desc
),
3937 &tss_segment_16
, sizeof tss_segment_16
))
3940 if (old_tss_sel
!= 0xffff) {
3941 tss_segment_16
.prev_task_link
= old_tss_sel
;
3943 if (kvm_write_guest(vcpu
->kvm
,
3944 get_tss_base_addr(vcpu
, nseg_desc
),
3945 &tss_segment_16
.prev_task_link
,
3946 sizeof tss_segment_16
.prev_task_link
))
3950 if (load_state_from_tss16(vcpu
, &tss_segment_16
))
3958 static int kvm_task_switch_32(struct kvm_vcpu
*vcpu
, u16 tss_selector
,
3959 u16 old_tss_sel
, u32 old_tss_base
,
3960 struct desc_struct
*nseg_desc
)
3962 struct tss_segment_32 tss_segment_32
;
3965 if (kvm_read_guest(vcpu
->kvm
, old_tss_base
, &tss_segment_32
,
3966 sizeof tss_segment_32
))
3969 save_state_to_tss32(vcpu
, &tss_segment_32
);
3971 if (kvm_write_guest(vcpu
->kvm
, old_tss_base
, &tss_segment_32
,
3972 sizeof tss_segment_32
))
3975 if (kvm_read_guest(vcpu
->kvm
, get_tss_base_addr(vcpu
, nseg_desc
),
3976 &tss_segment_32
, sizeof tss_segment_32
))
3979 if (old_tss_sel
!= 0xffff) {
3980 tss_segment_32
.prev_task_link
= old_tss_sel
;
3982 if (kvm_write_guest(vcpu
->kvm
,
3983 get_tss_base_addr(vcpu
, nseg_desc
),
3984 &tss_segment_32
.prev_task_link
,
3985 sizeof tss_segment_32
.prev_task_link
))
3989 if (load_state_from_tss32(vcpu
, &tss_segment_32
))
3997 int kvm_task_switch(struct kvm_vcpu
*vcpu
, u16 tss_selector
, int reason
)
3999 struct kvm_segment tr_seg
;
4000 struct desc_struct cseg_desc
;
4001 struct desc_struct nseg_desc
;
4003 u32 old_tss_base
= get_segment_base(vcpu
, VCPU_SREG_TR
);
4004 u16 old_tss_sel
= get_segment_selector(vcpu
, VCPU_SREG_TR
);
4006 old_tss_base
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, old_tss_base
);
4008 /* FIXME: Handle errors. Failure to read either TSS or their
4009 * descriptors should generate a pagefault.
4011 if (load_guest_segment_descriptor(vcpu
, tss_selector
, &nseg_desc
))
4014 if (load_guest_segment_descriptor(vcpu
, old_tss_sel
, &cseg_desc
))
4017 if (reason
!= TASK_SWITCH_IRET
) {
4020 cpl
= kvm_x86_ops
->get_cpl(vcpu
);
4021 if ((tss_selector
& 3) > nseg_desc
.dpl
|| cpl
> nseg_desc
.dpl
) {
4022 kvm_queue_exception_e(vcpu
, GP_VECTOR
, 0);
4027 if (!nseg_desc
.p
|| (nseg_desc
.limit0
| nseg_desc
.limit
<< 16) < 0x67) {
4028 kvm_queue_exception_e(vcpu
, TS_VECTOR
, tss_selector
& 0xfffc);
4032 if (reason
== TASK_SWITCH_IRET
|| reason
== TASK_SWITCH_JMP
) {
4033 cseg_desc
.type
&= ~(1 << 1); //clear the B flag
4034 save_guest_segment_descriptor(vcpu
, old_tss_sel
, &cseg_desc
);
4037 if (reason
== TASK_SWITCH_IRET
) {
4038 u32 eflags
= kvm_x86_ops
->get_rflags(vcpu
);
4039 kvm_x86_ops
->set_rflags(vcpu
, eflags
& ~X86_EFLAGS_NT
);
4042 /* set back link to prev task only if NT bit is set in eflags
4043 note that old_tss_sel is not used afetr this point */
4044 if (reason
!= TASK_SWITCH_CALL
&& reason
!= TASK_SWITCH_GATE
)
4045 old_tss_sel
= 0xffff;
4047 /* set back link to prev task only if NT bit is set in eflags
4048 note that old_tss_sel is not used afetr this point */
4049 if (reason
!= TASK_SWITCH_CALL
&& reason
!= TASK_SWITCH_GATE
)
4050 old_tss_sel
= 0xffff;
4052 if (nseg_desc
.type
& 8)
4053 ret
= kvm_task_switch_32(vcpu
, tss_selector
, old_tss_sel
,
4054 old_tss_base
, &nseg_desc
);
4056 ret
= kvm_task_switch_16(vcpu
, tss_selector
, old_tss_sel
,
4057 old_tss_base
, &nseg_desc
);
4059 if (reason
== TASK_SWITCH_CALL
|| reason
== TASK_SWITCH_GATE
) {
4060 u32 eflags
= kvm_x86_ops
->get_rflags(vcpu
);
4061 kvm_x86_ops
->set_rflags(vcpu
, eflags
| X86_EFLAGS_NT
);
4064 if (reason
!= TASK_SWITCH_IRET
) {
4065 nseg_desc
.type
|= (1 << 1);
4066 save_guest_segment_descriptor(vcpu
, tss_selector
,
4070 kvm_x86_ops
->set_cr0(vcpu
, vcpu
->arch
.cr0
| X86_CR0_TS
);
4071 seg_desct_to_kvm_desct(&nseg_desc
, tss_selector
, &tr_seg
);
4073 kvm_set_segment(vcpu
, &tr_seg
, VCPU_SREG_TR
);
4077 EXPORT_SYMBOL_GPL(kvm_task_switch
);
4079 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
4080 struct kvm_sregs
*sregs
)
4082 int mmu_reset_needed
= 0;
4083 int pending_vec
, max_bits
;
4084 struct descriptor_table dt
;
4088 dt
.limit
= sregs
->idt
.limit
;
4089 dt
.base
= sregs
->idt
.base
;
4090 kvm_x86_ops
->set_idt(vcpu
, &dt
);
4091 dt
.limit
= sregs
->gdt
.limit
;
4092 dt
.base
= sregs
->gdt
.base
;
4093 kvm_x86_ops
->set_gdt(vcpu
, &dt
);
4095 vcpu
->arch
.cr2
= sregs
->cr2
;
4096 mmu_reset_needed
|= vcpu
->arch
.cr3
!= sregs
->cr3
;
4098 down_read(&vcpu
->kvm
->slots_lock
);
4099 if (gfn_to_memslot(vcpu
->kvm
, sregs
->cr3
>> PAGE_SHIFT
))
4100 vcpu
->arch
.cr3
= sregs
->cr3
;
4102 set_bit(KVM_REQ_TRIPLE_FAULT
, &vcpu
->requests
);
4103 up_read(&vcpu
->kvm
->slots_lock
);
4105 kvm_set_cr8(vcpu
, sregs
->cr8
);
4107 mmu_reset_needed
|= vcpu
->arch
.shadow_efer
!= sregs
->efer
;
4108 kvm_x86_ops
->set_efer(vcpu
, sregs
->efer
);
4109 kvm_set_apic_base(vcpu
, sregs
->apic_base
);
4111 kvm_x86_ops
->decache_cr4_guest_bits(vcpu
);
4113 mmu_reset_needed
|= vcpu
->arch
.cr0
!= sregs
->cr0
;
4114 kvm_x86_ops
->set_cr0(vcpu
, sregs
->cr0
);
4115 vcpu
->arch
.cr0
= sregs
->cr0
;
4117 mmu_reset_needed
|= vcpu
->arch
.cr4
!= sregs
->cr4
;
4118 kvm_x86_ops
->set_cr4(vcpu
, sregs
->cr4
);
4119 if (!is_long_mode(vcpu
) && is_pae(vcpu
))
4120 load_pdptrs(vcpu
, vcpu
->arch
.cr3
);
4122 if (mmu_reset_needed
)
4123 kvm_mmu_reset_context(vcpu
);
4125 max_bits
= (sizeof sregs
->interrupt_bitmap
) << 3;
4126 pending_vec
= find_first_bit(
4127 (const unsigned long *)sregs
->interrupt_bitmap
, max_bits
);
4128 if (pending_vec
< max_bits
) {
4129 kvm_queue_interrupt(vcpu
, pending_vec
, false);
4130 pr_debug("Set back pending irq %d\n", pending_vec
);
4131 if (irqchip_in_kernel(vcpu
->kvm
))
4132 kvm_pic_clear_isr_ack(vcpu
->kvm
);
4135 kvm_set_segment(vcpu
, &sregs
->cs
, VCPU_SREG_CS
);
4136 kvm_set_segment(vcpu
, &sregs
->ds
, VCPU_SREG_DS
);
4137 kvm_set_segment(vcpu
, &sregs
->es
, VCPU_SREG_ES
);
4138 kvm_set_segment(vcpu
, &sregs
->fs
, VCPU_SREG_FS
);
4139 kvm_set_segment(vcpu
, &sregs
->gs
, VCPU_SREG_GS
);
4140 kvm_set_segment(vcpu
, &sregs
->ss
, VCPU_SREG_SS
);
4142 kvm_set_segment(vcpu
, &sregs
->tr
, VCPU_SREG_TR
);
4143 kvm_set_segment(vcpu
, &sregs
->ldt
, VCPU_SREG_LDTR
);
4145 /* Older userspace won't unhalt the vcpu on reset. */
4146 if (vcpu
->vcpu_id
== 0 && kvm_rip_read(vcpu
) == 0xfff0 &&
4147 sregs
->cs
.selector
== 0xf000 && sregs
->cs
.base
== 0xffff0000 &&
4148 !(vcpu
->arch
.cr0
& X86_CR0_PE
))
4149 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
4156 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu
*vcpu
,
4157 struct kvm_guest_debug
*dbg
)
4163 if ((dbg
->control
& (KVM_GUESTDBG_ENABLE
| KVM_GUESTDBG_USE_HW_BP
)) ==
4164 (KVM_GUESTDBG_ENABLE
| KVM_GUESTDBG_USE_HW_BP
)) {
4165 for (i
= 0; i
< KVM_NR_DB_REGS
; ++i
)
4166 vcpu
->arch
.eff_db
[i
] = dbg
->arch
.debugreg
[i
];
4167 vcpu
->arch
.switch_db_regs
=
4168 (dbg
->arch
.debugreg
[7] & DR7_BP_EN_MASK
);
4170 for (i
= 0; i
< KVM_NR_DB_REGS
; i
++)
4171 vcpu
->arch
.eff_db
[i
] = vcpu
->arch
.db
[i
];
4172 vcpu
->arch
.switch_db_regs
= (vcpu
->arch
.dr7
& DR7_BP_EN_MASK
);
4175 r
= kvm_x86_ops
->set_guest_debug(vcpu
, dbg
);
4177 if (dbg
->control
& KVM_GUESTDBG_INJECT_DB
)
4178 kvm_queue_exception(vcpu
, DB_VECTOR
);
4179 else if (dbg
->control
& KVM_GUESTDBG_INJECT_BP
)
4180 kvm_queue_exception(vcpu
, BP_VECTOR
);
4188 * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
4189 * we have asm/x86/processor.h
4200 u32 st_space
[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
4201 #ifdef CONFIG_X86_64
4202 u32 xmm_space
[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
4204 u32 xmm_space
[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
4209 * Translate a guest virtual address to a guest physical address.
4211 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
4212 struct kvm_translation
*tr
)
4214 unsigned long vaddr
= tr
->linear_address
;
4218 down_read(&vcpu
->kvm
->slots_lock
);
4219 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, vaddr
);
4220 up_read(&vcpu
->kvm
->slots_lock
);
4221 tr
->physical_address
= gpa
;
4222 tr
->valid
= gpa
!= UNMAPPED_GVA
;
4230 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
)
4232 struct fxsave
*fxsave
= (struct fxsave
*)&vcpu
->arch
.guest_fx_image
;
4236 memcpy(fpu
->fpr
, fxsave
->st_space
, 128);
4237 fpu
->fcw
= fxsave
->cwd
;
4238 fpu
->fsw
= fxsave
->swd
;
4239 fpu
->ftwx
= fxsave
->twd
;
4240 fpu
->last_opcode
= fxsave
->fop
;
4241 fpu
->last_ip
= fxsave
->rip
;
4242 fpu
->last_dp
= fxsave
->rdp
;
4243 memcpy(fpu
->xmm
, fxsave
->xmm_space
, sizeof fxsave
->xmm_space
);
4250 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
)
4252 struct fxsave
*fxsave
= (struct fxsave
*)&vcpu
->arch
.guest_fx_image
;
4256 memcpy(fxsave
->st_space
, fpu
->fpr
, 128);
4257 fxsave
->cwd
= fpu
->fcw
;
4258 fxsave
->swd
= fpu
->fsw
;
4259 fxsave
->twd
= fpu
->ftwx
;
4260 fxsave
->fop
= fpu
->last_opcode
;
4261 fxsave
->rip
= fpu
->last_ip
;
4262 fxsave
->rdp
= fpu
->last_dp
;
4263 memcpy(fxsave
->xmm_space
, fpu
->xmm
, sizeof fxsave
->xmm_space
);
4270 void fx_init(struct kvm_vcpu
*vcpu
)
4272 unsigned after_mxcsr_mask
;
4275 * Touch the fpu the first time in non atomic context as if
4276 * this is the first fpu instruction the exception handler
4277 * will fire before the instruction returns and it'll have to
4278 * allocate ram with GFP_KERNEL.
4281 kvm_fx_save(&vcpu
->arch
.host_fx_image
);
4283 /* Initialize guest FPU by resetting ours and saving into guest's */
4285 kvm_fx_save(&vcpu
->arch
.host_fx_image
);
4287 kvm_fx_save(&vcpu
->arch
.guest_fx_image
);
4288 kvm_fx_restore(&vcpu
->arch
.host_fx_image
);
4291 vcpu
->arch
.cr0
|= X86_CR0_ET
;
4292 after_mxcsr_mask
= offsetof(struct i387_fxsave_struct
, st_space
);
4293 vcpu
->arch
.guest_fx_image
.mxcsr
= 0x1f80;
4294 memset((void *)&vcpu
->arch
.guest_fx_image
+ after_mxcsr_mask
,
4295 0, sizeof(struct i387_fxsave_struct
) - after_mxcsr_mask
);
4297 EXPORT_SYMBOL_GPL(fx_init
);
4299 void kvm_load_guest_fpu(struct kvm_vcpu
*vcpu
)
4301 if (!vcpu
->fpu_active
|| vcpu
->guest_fpu_loaded
)
4304 vcpu
->guest_fpu_loaded
= 1;
4305 kvm_fx_save(&vcpu
->arch
.host_fx_image
);
4306 kvm_fx_restore(&vcpu
->arch
.guest_fx_image
);
4308 EXPORT_SYMBOL_GPL(kvm_load_guest_fpu
);
4310 void kvm_put_guest_fpu(struct kvm_vcpu
*vcpu
)
4312 if (!vcpu
->guest_fpu_loaded
)
4315 vcpu
->guest_fpu_loaded
= 0;
4316 kvm_fx_save(&vcpu
->arch
.guest_fx_image
);
4317 kvm_fx_restore(&vcpu
->arch
.host_fx_image
);
4318 ++vcpu
->stat
.fpu_reload
;
4320 EXPORT_SYMBOL_GPL(kvm_put_guest_fpu
);
4322 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
)
4324 if (vcpu
->arch
.time_page
) {
4325 kvm_release_page_dirty(vcpu
->arch
.time_page
);
4326 vcpu
->arch
.time_page
= NULL
;
4329 kvm_x86_ops
->vcpu_free(vcpu
);
4332 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
,
4335 return kvm_x86_ops
->vcpu_create(kvm
, id
);
4338 int kvm_arch_vcpu_setup(struct kvm_vcpu
*vcpu
)
4342 /* We do fxsave: this must be aligned. */
4343 BUG_ON((unsigned long)&vcpu
->arch
.host_fx_image
& 0xF);
4345 vcpu
->arch
.mtrr_state
.have_fixed
= 1;
4347 r
= kvm_arch_vcpu_reset(vcpu
);
4349 r
= kvm_mmu_setup(vcpu
);
4356 kvm_x86_ops
->vcpu_free(vcpu
);
4360 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
)
4363 kvm_mmu_unload(vcpu
);
4366 kvm_x86_ops
->vcpu_free(vcpu
);
4369 int kvm_arch_vcpu_reset(struct kvm_vcpu
*vcpu
)
4371 vcpu
->arch
.nmi_pending
= false;
4372 vcpu
->arch
.nmi_injected
= false;
4374 vcpu
->arch
.switch_db_regs
= 0;
4375 memset(vcpu
->arch
.db
, 0, sizeof(vcpu
->arch
.db
));
4376 vcpu
->arch
.dr6
= DR6_FIXED_1
;
4377 vcpu
->arch
.dr7
= DR7_FIXED_1
;
4379 return kvm_x86_ops
->vcpu_reset(vcpu
);
4382 void kvm_arch_hardware_enable(void *garbage
)
4384 kvm_x86_ops
->hardware_enable(garbage
);
4387 void kvm_arch_hardware_disable(void *garbage
)
4389 kvm_x86_ops
->hardware_disable(garbage
);
4392 int kvm_arch_hardware_setup(void)
4394 return kvm_x86_ops
->hardware_setup();
4397 void kvm_arch_hardware_unsetup(void)
4399 kvm_x86_ops
->hardware_unsetup();
4402 void kvm_arch_check_processor_compat(void *rtn
)
4404 kvm_x86_ops
->check_processor_compatibility(rtn
);
4407 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
)
4413 BUG_ON(vcpu
->kvm
== NULL
);
4416 vcpu
->arch
.mmu
.root_hpa
= INVALID_PAGE
;
4417 if (!irqchip_in_kernel(kvm
) || vcpu
->vcpu_id
== 0)
4418 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
4420 vcpu
->arch
.mp_state
= KVM_MP_STATE_UNINITIALIZED
;
4422 page
= alloc_page(GFP_KERNEL
| __GFP_ZERO
);
4427 vcpu
->arch
.pio_data
= page_address(page
);
4429 r
= kvm_mmu_create(vcpu
);
4431 goto fail_free_pio_data
;
4433 if (irqchip_in_kernel(kvm
)) {
4434 r
= kvm_create_lapic(vcpu
);
4436 goto fail_mmu_destroy
;
4442 kvm_mmu_destroy(vcpu
);
4444 free_page((unsigned long)vcpu
->arch
.pio_data
);
4449 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
)
4451 kvm_free_lapic(vcpu
);
4452 down_read(&vcpu
->kvm
->slots_lock
);
4453 kvm_mmu_destroy(vcpu
);
4454 up_read(&vcpu
->kvm
->slots_lock
);
4455 free_page((unsigned long)vcpu
->arch
.pio_data
);
4458 struct kvm
*kvm_arch_create_vm(void)
4460 struct kvm
*kvm
= kzalloc(sizeof(struct kvm
), GFP_KERNEL
);
4463 return ERR_PTR(-ENOMEM
);
4465 INIT_LIST_HEAD(&kvm
->arch
.active_mmu_pages
);
4466 INIT_LIST_HEAD(&kvm
->arch
.assigned_dev_head
);
4468 /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
4469 set_bit(KVM_USERSPACE_IRQ_SOURCE_ID
, &kvm
->arch
.irq_sources_bitmap
);
4471 rdtscll(kvm
->arch
.vm_init_tsc
);
4476 static void kvm_unload_vcpu_mmu(struct kvm_vcpu
*vcpu
)
4479 kvm_mmu_unload(vcpu
);
4483 static void kvm_free_vcpus(struct kvm
*kvm
)
4488 * Unpin any mmu pages first.
4490 for (i
= 0; i
< KVM_MAX_VCPUS
; ++i
)
4492 kvm_unload_vcpu_mmu(kvm
->vcpus
[i
]);
4493 for (i
= 0; i
< KVM_MAX_VCPUS
; ++i
) {
4494 if (kvm
->vcpus
[i
]) {
4495 kvm_arch_vcpu_free(kvm
->vcpus
[i
]);
4496 kvm
->vcpus
[i
] = NULL
;
4502 void kvm_arch_sync_events(struct kvm
*kvm
)
4504 kvm_free_all_assigned_devices(kvm
);
4507 void kvm_arch_destroy_vm(struct kvm
*kvm
)
4509 kvm_iommu_unmap_guest(kvm
);
4511 kfree(kvm
->arch
.vpic
);
4512 kfree(kvm
->arch
.vioapic
);
4513 kvm_free_vcpus(kvm
);
4514 kvm_free_physmem(kvm
);
4515 if (kvm
->arch
.apic_access_page
)
4516 put_page(kvm
->arch
.apic_access_page
);
4517 if (kvm
->arch
.ept_identity_pagetable
)
4518 put_page(kvm
->arch
.ept_identity_pagetable
);
4522 int kvm_arch_set_memory_region(struct kvm
*kvm
,
4523 struct kvm_userspace_memory_region
*mem
,
4524 struct kvm_memory_slot old
,
4527 int npages
= mem
->memory_size
>> PAGE_SHIFT
;
4528 struct kvm_memory_slot
*memslot
= &kvm
->memslots
[mem
->slot
];
4530 /*To keep backward compatibility with older userspace,
4531 *x86 needs to hanlde !user_alloc case.
4534 if (npages
&& !old
.rmap
) {
4535 unsigned long userspace_addr
;
4537 down_write(¤t
->mm
->mmap_sem
);
4538 userspace_addr
= do_mmap(NULL
, 0,
4540 PROT_READ
| PROT_WRITE
,
4541 MAP_PRIVATE
| MAP_ANONYMOUS
,
4543 up_write(¤t
->mm
->mmap_sem
);
4545 if (IS_ERR((void *)userspace_addr
))
4546 return PTR_ERR((void *)userspace_addr
);
4548 /* set userspace_addr atomically for kvm_hva_to_rmapp */
4549 spin_lock(&kvm
->mmu_lock
);
4550 memslot
->userspace_addr
= userspace_addr
;
4551 spin_unlock(&kvm
->mmu_lock
);
4553 if (!old
.user_alloc
&& old
.rmap
) {
4556 down_write(¤t
->mm
->mmap_sem
);
4557 ret
= do_munmap(current
->mm
, old
.userspace_addr
,
4558 old
.npages
* PAGE_SIZE
);
4559 up_write(¤t
->mm
->mmap_sem
);
4562 "kvm_vm_ioctl_set_memory_region: "
4563 "failed to munmap memory\n");
4568 spin_lock(&kvm
->mmu_lock
);
4569 if (!kvm
->arch
.n_requested_mmu_pages
) {
4570 unsigned int nr_mmu_pages
= kvm_mmu_calculate_mmu_pages(kvm
);
4571 kvm_mmu_change_mmu_pages(kvm
, nr_mmu_pages
);
4574 kvm_mmu_slot_remove_write_access(kvm
, mem
->slot
);
4575 spin_unlock(&kvm
->mmu_lock
);
4576 kvm_flush_remote_tlbs(kvm
);
4581 void kvm_arch_flush_shadow(struct kvm
*kvm
)
4583 kvm_mmu_zap_all(kvm
);
4584 kvm_reload_remote_mmus(kvm
);
4587 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
)
4589 return vcpu
->arch
.mp_state
== KVM_MP_STATE_RUNNABLE
4590 || vcpu
->arch
.mp_state
== KVM_MP_STATE_SIPI_RECEIVED
4591 || vcpu
->arch
.nmi_pending
;
4594 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
)
4597 int cpu
= vcpu
->cpu
;
4599 if (waitqueue_active(&vcpu
->wq
)) {
4600 wake_up_interruptible(&vcpu
->wq
);
4601 ++vcpu
->stat
.halt_wakeup
;
4605 if (cpu
!= me
&& (unsigned)cpu
< nr_cpu_ids
&& cpu_online(cpu
))
4606 if (!test_and_set_bit(KVM_REQ_KICK
, &vcpu
->requests
))
4607 smp_send_reschedule(cpu
);
4611 int kvm_arch_interrupt_allowed(struct kvm_vcpu
*vcpu
)
4613 return kvm_x86_ops
->interrupt_allowed(vcpu
);