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 { "request_nmi", VCPU_STAT(request_nmi_exits
) },
95 { "irq_exits", VCPU_STAT(irq_exits
) },
96 { "host_state_reload", VCPU_STAT(host_state_reload
) },
97 { "efer_reload", VCPU_STAT(efer_reload
) },
98 { "fpu_reload", VCPU_STAT(fpu_reload
) },
99 { "insn_emulation", VCPU_STAT(insn_emulation
) },
100 { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail
) },
101 { "irq_injections", VCPU_STAT(irq_injections
) },
102 { "nmi_injections", VCPU_STAT(nmi_injections
) },
103 { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped
) },
104 { "mmu_pte_write", VM_STAT(mmu_pte_write
) },
105 { "mmu_pte_updated", VM_STAT(mmu_pte_updated
) },
106 { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped
) },
107 { "mmu_flooded", VM_STAT(mmu_flooded
) },
108 { "mmu_recycled", VM_STAT(mmu_recycled
) },
109 { "mmu_cache_miss", VM_STAT(mmu_cache_miss
) },
110 { "mmu_unsync", VM_STAT(mmu_unsync
) },
111 { "mmu_unsync_global", VM_STAT(mmu_unsync_global
) },
112 { "remote_tlb_flush", VM_STAT(remote_tlb_flush
) },
113 { "largepages", VM_STAT(lpages
) },
117 unsigned long segment_base(u16 selector
)
119 struct descriptor_table gdt
;
120 struct desc_struct
*d
;
121 unsigned long table_base
;
127 asm("sgdt %0" : "=m"(gdt
));
128 table_base
= gdt
.base
;
130 if (selector
& 4) { /* from ldt */
133 asm("sldt %0" : "=g"(ldt_selector
));
134 table_base
= segment_base(ldt_selector
);
136 d
= (struct desc_struct
*)(table_base
+ (selector
& ~7));
137 v
= d
->base0
| ((unsigned long)d
->base1
<< 16) |
138 ((unsigned long)d
->base2
<< 24);
140 if (d
->s
== 0 && (d
->type
== 2 || d
->type
== 9 || d
->type
== 11))
141 v
|= ((unsigned long)((struct ldttss_desc64
*)d
)->base3
) << 32;
145 EXPORT_SYMBOL_GPL(segment_base
);
147 u64
kvm_get_apic_base(struct kvm_vcpu
*vcpu
)
149 if (irqchip_in_kernel(vcpu
->kvm
))
150 return vcpu
->arch
.apic_base
;
152 return vcpu
->arch
.apic_base
;
154 EXPORT_SYMBOL_GPL(kvm_get_apic_base
);
156 void kvm_set_apic_base(struct kvm_vcpu
*vcpu
, u64 data
)
158 /* TODO: reserve bits check */
159 if (irqchip_in_kernel(vcpu
->kvm
))
160 kvm_lapic_set_base(vcpu
, data
);
162 vcpu
->arch
.apic_base
= data
;
164 EXPORT_SYMBOL_GPL(kvm_set_apic_base
);
166 void kvm_queue_exception(struct kvm_vcpu
*vcpu
, unsigned nr
)
168 WARN_ON(vcpu
->arch
.exception
.pending
);
169 vcpu
->arch
.exception
.pending
= true;
170 vcpu
->arch
.exception
.has_error_code
= false;
171 vcpu
->arch
.exception
.nr
= nr
;
173 EXPORT_SYMBOL_GPL(kvm_queue_exception
);
175 void kvm_inject_page_fault(struct kvm_vcpu
*vcpu
, unsigned long addr
,
178 ++vcpu
->stat
.pf_guest
;
180 if (vcpu
->arch
.exception
.pending
) {
181 if (vcpu
->arch
.exception
.nr
== PF_VECTOR
) {
182 printk(KERN_DEBUG
"kvm: inject_page_fault:"
183 " double fault 0x%lx\n", addr
);
184 vcpu
->arch
.exception
.nr
= DF_VECTOR
;
185 vcpu
->arch
.exception
.error_code
= 0;
186 } else if (vcpu
->arch
.exception
.nr
== DF_VECTOR
) {
187 /* triple fault -> shutdown */
188 set_bit(KVM_REQ_TRIPLE_FAULT
, &vcpu
->requests
);
192 vcpu
->arch
.cr2
= addr
;
193 kvm_queue_exception_e(vcpu
, PF_VECTOR
, error_code
);
196 void kvm_inject_nmi(struct kvm_vcpu
*vcpu
)
198 vcpu
->arch
.nmi_pending
= 1;
200 EXPORT_SYMBOL_GPL(kvm_inject_nmi
);
202 void kvm_queue_exception_e(struct kvm_vcpu
*vcpu
, unsigned nr
, u32 error_code
)
204 WARN_ON(vcpu
->arch
.exception
.pending
);
205 vcpu
->arch
.exception
.pending
= true;
206 vcpu
->arch
.exception
.has_error_code
= true;
207 vcpu
->arch
.exception
.nr
= nr
;
208 vcpu
->arch
.exception
.error_code
= error_code
;
210 EXPORT_SYMBOL_GPL(kvm_queue_exception_e
);
212 static void __queue_exception(struct kvm_vcpu
*vcpu
)
214 kvm_x86_ops
->queue_exception(vcpu
, vcpu
->arch
.exception
.nr
,
215 vcpu
->arch
.exception
.has_error_code
,
216 vcpu
->arch
.exception
.error_code
);
220 * Load the pae pdptrs. Return true is they are all valid.
222 int load_pdptrs(struct kvm_vcpu
*vcpu
, unsigned long cr3
)
224 gfn_t pdpt_gfn
= cr3
>> PAGE_SHIFT
;
225 unsigned offset
= ((cr3
& (PAGE_SIZE
-1)) >> 5) << 2;
228 u64 pdpte
[ARRAY_SIZE(vcpu
->arch
.pdptrs
)];
230 ret
= kvm_read_guest_page(vcpu
->kvm
, pdpt_gfn
, pdpte
,
231 offset
* sizeof(u64
), sizeof(pdpte
));
236 for (i
= 0; i
< ARRAY_SIZE(pdpte
); ++i
) {
237 if ((pdpte
[i
] & 1) && (pdpte
[i
] & 0xfffffff0000001e6ull
)) {
244 memcpy(vcpu
->arch
.pdptrs
, pdpte
, sizeof(vcpu
->arch
.pdptrs
));
249 EXPORT_SYMBOL_GPL(load_pdptrs
);
251 static bool pdptrs_changed(struct kvm_vcpu
*vcpu
)
253 u64 pdpte
[ARRAY_SIZE(vcpu
->arch
.pdptrs
)];
257 if (is_long_mode(vcpu
) || !is_pae(vcpu
))
260 r
= kvm_read_guest(vcpu
->kvm
, vcpu
->arch
.cr3
& ~31u, pdpte
, sizeof(pdpte
));
263 changed
= memcmp(pdpte
, vcpu
->arch
.pdptrs
, sizeof(pdpte
)) != 0;
269 void kvm_set_cr0(struct kvm_vcpu
*vcpu
, unsigned long cr0
)
271 if (cr0
& CR0_RESERVED_BITS
) {
272 printk(KERN_DEBUG
"set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
273 cr0
, vcpu
->arch
.cr0
);
274 kvm_inject_gp(vcpu
, 0);
278 if ((cr0
& X86_CR0_NW
) && !(cr0
& X86_CR0_CD
)) {
279 printk(KERN_DEBUG
"set_cr0: #GP, CD == 0 && NW == 1\n");
280 kvm_inject_gp(vcpu
, 0);
284 if ((cr0
& X86_CR0_PG
) && !(cr0
& X86_CR0_PE
)) {
285 printk(KERN_DEBUG
"set_cr0: #GP, set PG flag "
286 "and a clear PE flag\n");
287 kvm_inject_gp(vcpu
, 0);
291 if (!is_paging(vcpu
) && (cr0
& X86_CR0_PG
)) {
293 if ((vcpu
->arch
.shadow_efer
& EFER_LME
)) {
297 printk(KERN_DEBUG
"set_cr0: #GP, start paging "
298 "in long mode while PAE is disabled\n");
299 kvm_inject_gp(vcpu
, 0);
302 kvm_x86_ops
->get_cs_db_l_bits(vcpu
, &cs_db
, &cs_l
);
304 printk(KERN_DEBUG
"set_cr0: #GP, start paging "
305 "in long mode while CS.L == 1\n");
306 kvm_inject_gp(vcpu
, 0);
312 if (is_pae(vcpu
) && !load_pdptrs(vcpu
, vcpu
->arch
.cr3
)) {
313 printk(KERN_DEBUG
"set_cr0: #GP, pdptrs "
315 kvm_inject_gp(vcpu
, 0);
321 kvm_x86_ops
->set_cr0(vcpu
, cr0
);
322 vcpu
->arch
.cr0
= cr0
;
324 kvm_mmu_sync_global(vcpu
);
325 kvm_mmu_reset_context(vcpu
);
328 EXPORT_SYMBOL_GPL(kvm_set_cr0
);
330 void kvm_lmsw(struct kvm_vcpu
*vcpu
, unsigned long msw
)
332 kvm_set_cr0(vcpu
, (vcpu
->arch
.cr0
& ~0x0ful
) | (msw
& 0x0f));
333 KVMTRACE_1D(LMSW
, vcpu
,
334 (u32
)((vcpu
->arch
.cr0
& ~0x0ful
) | (msw
& 0x0f)),
337 EXPORT_SYMBOL_GPL(kvm_lmsw
);
339 void kvm_set_cr4(struct kvm_vcpu
*vcpu
, unsigned long cr4
)
341 unsigned long old_cr4
= vcpu
->arch
.cr4
;
342 unsigned long pdptr_bits
= X86_CR4_PGE
| X86_CR4_PSE
| X86_CR4_PAE
;
344 if (cr4
& CR4_RESERVED_BITS
) {
345 printk(KERN_DEBUG
"set_cr4: #GP, reserved bits\n");
346 kvm_inject_gp(vcpu
, 0);
350 if (is_long_mode(vcpu
)) {
351 if (!(cr4
& X86_CR4_PAE
)) {
352 printk(KERN_DEBUG
"set_cr4: #GP, clearing PAE while "
354 kvm_inject_gp(vcpu
, 0);
357 } else if (is_paging(vcpu
) && (cr4
& X86_CR4_PAE
)
358 && ((cr4
^ old_cr4
) & pdptr_bits
)
359 && !load_pdptrs(vcpu
, vcpu
->arch
.cr3
)) {
360 printk(KERN_DEBUG
"set_cr4: #GP, pdptrs reserved bits\n");
361 kvm_inject_gp(vcpu
, 0);
365 if (cr4
& X86_CR4_VMXE
) {
366 printk(KERN_DEBUG
"set_cr4: #GP, setting VMXE\n");
367 kvm_inject_gp(vcpu
, 0);
370 kvm_x86_ops
->set_cr4(vcpu
, cr4
);
371 vcpu
->arch
.cr4
= cr4
;
372 vcpu
->arch
.mmu
.base_role
.cr4_pge
= (cr4
& X86_CR4_PGE
) && !tdp_enabled
;
373 kvm_mmu_sync_global(vcpu
);
374 kvm_mmu_reset_context(vcpu
);
376 EXPORT_SYMBOL_GPL(kvm_set_cr4
);
378 void kvm_set_cr3(struct kvm_vcpu
*vcpu
, unsigned long cr3
)
380 if (cr3
== vcpu
->arch
.cr3
&& !pdptrs_changed(vcpu
)) {
381 kvm_mmu_sync_roots(vcpu
);
382 kvm_mmu_flush_tlb(vcpu
);
386 if (is_long_mode(vcpu
)) {
387 if (cr3
& CR3_L_MODE_RESERVED_BITS
) {
388 printk(KERN_DEBUG
"set_cr3: #GP, reserved bits\n");
389 kvm_inject_gp(vcpu
, 0);
394 if (cr3
& CR3_PAE_RESERVED_BITS
) {
396 "set_cr3: #GP, reserved bits\n");
397 kvm_inject_gp(vcpu
, 0);
400 if (is_paging(vcpu
) && !load_pdptrs(vcpu
, cr3
)) {
401 printk(KERN_DEBUG
"set_cr3: #GP, pdptrs "
403 kvm_inject_gp(vcpu
, 0);
408 * We don't check reserved bits in nonpae mode, because
409 * this isn't enforced, and VMware depends on this.
414 * Does the new cr3 value map to physical memory? (Note, we
415 * catch an invalid cr3 even in real-mode, because it would
416 * cause trouble later on when we turn on paging anyway.)
418 * A real CPU would silently accept an invalid cr3 and would
419 * attempt to use it - with largely undefined (and often hard
420 * to debug) behavior on the guest side.
422 if (unlikely(!gfn_to_memslot(vcpu
->kvm
, cr3
>> PAGE_SHIFT
)))
423 kvm_inject_gp(vcpu
, 0);
425 vcpu
->arch
.cr3
= cr3
;
426 vcpu
->arch
.mmu
.new_cr3(vcpu
);
429 EXPORT_SYMBOL_GPL(kvm_set_cr3
);
431 void kvm_set_cr8(struct kvm_vcpu
*vcpu
, unsigned long cr8
)
433 if (cr8
& CR8_RESERVED_BITS
) {
434 printk(KERN_DEBUG
"set_cr8: #GP, reserved bits 0x%lx\n", cr8
);
435 kvm_inject_gp(vcpu
, 0);
438 if (irqchip_in_kernel(vcpu
->kvm
))
439 kvm_lapic_set_tpr(vcpu
, cr8
);
441 vcpu
->arch
.cr8
= cr8
;
443 EXPORT_SYMBOL_GPL(kvm_set_cr8
);
445 unsigned long kvm_get_cr8(struct kvm_vcpu
*vcpu
)
447 if (irqchip_in_kernel(vcpu
->kvm
))
448 return kvm_lapic_get_cr8(vcpu
);
450 return vcpu
->arch
.cr8
;
452 EXPORT_SYMBOL_GPL(kvm_get_cr8
);
454 static inline u32
bit(int bitno
)
456 return 1 << (bitno
& 31);
460 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
461 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
463 * This list is modified at module load time to reflect the
464 * capabilities of the host cpu.
466 static u32 msrs_to_save
[] = {
467 MSR_IA32_SYSENTER_CS
, MSR_IA32_SYSENTER_ESP
, MSR_IA32_SYSENTER_EIP
,
470 MSR_CSTAR
, MSR_KERNEL_GS_BASE
, MSR_SYSCALL_MASK
, MSR_LSTAR
,
472 MSR_IA32_TIME_STAMP_COUNTER
, MSR_KVM_SYSTEM_TIME
, MSR_KVM_WALL_CLOCK
,
473 MSR_IA32_PERF_STATUS
, MSR_IA32_CR_PAT
, MSR_VM_HSAVE_PA
476 static unsigned num_msrs_to_save
;
478 static u32 emulated_msrs
[] = {
479 MSR_IA32_MISC_ENABLE
,
482 static void set_efer(struct kvm_vcpu
*vcpu
, u64 efer
)
484 if (efer
& efer_reserved_bits
) {
485 printk(KERN_DEBUG
"set_efer: 0x%llx #GP, reserved bits\n",
487 kvm_inject_gp(vcpu
, 0);
492 && (vcpu
->arch
.shadow_efer
& EFER_LME
) != (efer
& EFER_LME
)) {
493 printk(KERN_DEBUG
"set_efer: #GP, change LME while paging\n");
494 kvm_inject_gp(vcpu
, 0);
498 if (efer
& EFER_FFXSR
) {
499 struct kvm_cpuid_entry2
*feat
;
501 feat
= kvm_find_cpuid_entry(vcpu
, 0x80000001, 0);
502 if (!feat
|| !(feat
->edx
& bit(X86_FEATURE_FXSR_OPT
))) {
503 printk(KERN_DEBUG
"set_efer: #GP, enable FFXSR w/o CPUID capability\n");
504 kvm_inject_gp(vcpu
, 0);
509 if (efer
& EFER_SVME
) {
510 struct kvm_cpuid_entry2
*feat
;
512 feat
= kvm_find_cpuid_entry(vcpu
, 0x80000001, 0);
513 if (!feat
|| !(feat
->ecx
& bit(X86_FEATURE_SVM
))) {
514 printk(KERN_DEBUG
"set_efer: #GP, enable SVM w/o SVM\n");
515 kvm_inject_gp(vcpu
, 0);
520 kvm_x86_ops
->set_efer(vcpu
, efer
);
523 efer
|= vcpu
->arch
.shadow_efer
& EFER_LMA
;
525 vcpu
->arch
.shadow_efer
= efer
;
527 vcpu
->arch
.mmu
.base_role
.nxe
= (efer
& EFER_NX
) && !tdp_enabled
;
528 kvm_mmu_reset_context(vcpu
);
531 void kvm_enable_efer_bits(u64 mask
)
533 efer_reserved_bits
&= ~mask
;
535 EXPORT_SYMBOL_GPL(kvm_enable_efer_bits
);
539 * Writes msr value into into the appropriate "register".
540 * Returns 0 on success, non-0 otherwise.
541 * Assumes vcpu_load() was already called.
543 int kvm_set_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64 data
)
545 return kvm_x86_ops
->set_msr(vcpu
, msr_index
, data
);
549 * Adapt set_msr() to msr_io()'s calling convention
551 static int do_set_msr(struct kvm_vcpu
*vcpu
, unsigned index
, u64
*data
)
553 return kvm_set_msr(vcpu
, index
, *data
);
556 static void kvm_write_wall_clock(struct kvm
*kvm
, gpa_t wall_clock
)
559 struct pvclock_wall_clock wc
;
560 struct timespec now
, sys
, boot
;
567 kvm_write_guest(kvm
, wall_clock
, &version
, sizeof(version
));
570 * The guest calculates current wall clock time by adding
571 * system time (updated by kvm_write_guest_time below) to the
572 * wall clock specified here. guest system time equals host
573 * system time for us, thus we must fill in host boot time here.
575 now
= current_kernel_time();
577 boot
= ns_to_timespec(timespec_to_ns(&now
) - timespec_to_ns(&sys
));
579 wc
.sec
= boot
.tv_sec
;
580 wc
.nsec
= boot
.tv_nsec
;
581 wc
.version
= version
;
583 kvm_write_guest(kvm
, wall_clock
, &wc
, sizeof(wc
));
586 kvm_write_guest(kvm
, wall_clock
, &version
, sizeof(version
));
589 static uint32_t div_frac(uint32_t dividend
, uint32_t divisor
)
591 uint32_t quotient
, remainder
;
593 /* Don't try to replace with do_div(), this one calculates
594 * "(dividend << 32) / divisor" */
596 : "=a" (quotient
), "=d" (remainder
)
597 : "0" (0), "1" (dividend
), "r" (divisor
) );
601 static void kvm_set_time_scale(uint32_t tsc_khz
, struct pvclock_vcpu_time_info
*hv_clock
)
603 uint64_t nsecs
= 1000000000LL;
608 tps64
= tsc_khz
* 1000LL;
609 while (tps64
> nsecs
*2) {
614 tps32
= (uint32_t)tps64
;
615 while (tps32
<= (uint32_t)nsecs
) {
620 hv_clock
->tsc_shift
= shift
;
621 hv_clock
->tsc_to_system_mul
= div_frac(nsecs
, tps32
);
623 pr_debug("%s: tsc_khz %u, tsc_shift %d, tsc_mul %u\n",
624 __func__
, tsc_khz
, hv_clock
->tsc_shift
,
625 hv_clock
->tsc_to_system_mul
);
628 static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz
);
630 static void kvm_write_guest_time(struct kvm_vcpu
*v
)
634 struct kvm_vcpu_arch
*vcpu
= &v
->arch
;
637 if ((!vcpu
->time_page
))
641 if (unlikely(vcpu
->hv_clock_tsc_khz
!= __get_cpu_var(cpu_tsc_khz
))) {
642 kvm_set_time_scale(__get_cpu_var(cpu_tsc_khz
), &vcpu
->hv_clock
);
643 vcpu
->hv_clock_tsc_khz
= __get_cpu_var(cpu_tsc_khz
);
647 /* Keep irq disabled to prevent changes to the clock */
648 local_irq_save(flags
);
649 kvm_get_msr(v
, MSR_IA32_TIME_STAMP_COUNTER
,
650 &vcpu
->hv_clock
.tsc_timestamp
);
652 local_irq_restore(flags
);
654 /* With all the info we got, fill in the values */
656 vcpu
->hv_clock
.system_time
= ts
.tv_nsec
+
657 (NSEC_PER_SEC
* (u64
)ts
.tv_sec
);
659 * The interface expects us to write an even number signaling that the
660 * update is finished. Since the guest won't see the intermediate
661 * state, we just increase by 2 at the end.
663 vcpu
->hv_clock
.version
+= 2;
665 shared_kaddr
= kmap_atomic(vcpu
->time_page
, KM_USER0
);
667 memcpy(shared_kaddr
+ vcpu
->time_offset
, &vcpu
->hv_clock
,
668 sizeof(vcpu
->hv_clock
));
670 kunmap_atomic(shared_kaddr
, KM_USER0
);
672 mark_page_dirty(v
->kvm
, vcpu
->time
>> PAGE_SHIFT
);
675 static int kvm_request_guest_time_update(struct kvm_vcpu
*v
)
677 struct kvm_vcpu_arch
*vcpu
= &v
->arch
;
679 if (!vcpu
->time_page
)
681 set_bit(KVM_REQ_KVMCLOCK_UPDATE
, &v
->requests
);
685 static bool msr_mtrr_valid(unsigned msr
)
688 case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR
- 1:
689 case MSR_MTRRfix64K_00000
:
690 case MSR_MTRRfix16K_80000
:
691 case MSR_MTRRfix16K_A0000
:
692 case MSR_MTRRfix4K_C0000
:
693 case MSR_MTRRfix4K_C8000
:
694 case MSR_MTRRfix4K_D0000
:
695 case MSR_MTRRfix4K_D8000
:
696 case MSR_MTRRfix4K_E0000
:
697 case MSR_MTRRfix4K_E8000
:
698 case MSR_MTRRfix4K_F0000
:
699 case MSR_MTRRfix4K_F8000
:
700 case MSR_MTRRdefType
:
701 case MSR_IA32_CR_PAT
:
709 static int set_msr_mtrr(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
711 u64
*p
= (u64
*)&vcpu
->arch
.mtrr_state
.fixed_ranges
;
713 if (!msr_mtrr_valid(msr
))
716 if (msr
== MSR_MTRRdefType
) {
717 vcpu
->arch
.mtrr_state
.def_type
= data
;
718 vcpu
->arch
.mtrr_state
.enabled
= (data
& 0xc00) >> 10;
719 } else if (msr
== MSR_MTRRfix64K_00000
)
721 else if (msr
== MSR_MTRRfix16K_80000
|| msr
== MSR_MTRRfix16K_A0000
)
722 p
[1 + msr
- MSR_MTRRfix16K_80000
] = data
;
723 else if (msr
>= MSR_MTRRfix4K_C0000
&& msr
<= MSR_MTRRfix4K_F8000
)
724 p
[3 + msr
- MSR_MTRRfix4K_C0000
] = data
;
725 else if (msr
== MSR_IA32_CR_PAT
)
726 vcpu
->arch
.pat
= data
;
727 else { /* Variable MTRRs */
728 int idx
, is_mtrr_mask
;
731 idx
= (msr
- 0x200) / 2;
732 is_mtrr_mask
= msr
- 0x200 - 2 * idx
;
735 (u64
*)&vcpu
->arch
.mtrr_state
.var_ranges
[idx
].base_lo
;
738 (u64
*)&vcpu
->arch
.mtrr_state
.var_ranges
[idx
].mask_lo
;
742 kvm_mmu_reset_context(vcpu
);
746 int kvm_set_msr_common(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
750 set_efer(vcpu
, data
);
752 case MSR_IA32_MC0_STATUS
:
753 pr_unimpl(vcpu
, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n",
756 case MSR_IA32_MCG_STATUS
:
757 pr_unimpl(vcpu
, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n",
760 case MSR_IA32_MCG_CTL
:
761 pr_unimpl(vcpu
, "%s: MSR_IA32_MCG_CTL 0x%llx, nop\n",
764 case MSR_IA32_DEBUGCTLMSR
:
766 /* We support the non-activated case already */
768 } else if (data
& ~(DEBUGCTLMSR_LBR
| DEBUGCTLMSR_BTF
)) {
769 /* Values other than LBR and BTF are vendor-specific,
770 thus reserved and should throw a #GP */
773 pr_unimpl(vcpu
, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n",
776 case MSR_IA32_UCODE_REV
:
777 case MSR_IA32_UCODE_WRITE
:
778 case MSR_VM_HSAVE_PA
:
780 case 0x200 ... 0x2ff:
781 return set_msr_mtrr(vcpu
, msr
, data
);
782 case MSR_IA32_APICBASE
:
783 kvm_set_apic_base(vcpu
, data
);
785 case MSR_IA32_MISC_ENABLE
:
786 vcpu
->arch
.ia32_misc_enable_msr
= data
;
788 case MSR_KVM_WALL_CLOCK
:
789 vcpu
->kvm
->arch
.wall_clock
= data
;
790 kvm_write_wall_clock(vcpu
->kvm
, data
);
792 case MSR_KVM_SYSTEM_TIME
: {
793 if (vcpu
->arch
.time_page
) {
794 kvm_release_page_dirty(vcpu
->arch
.time_page
);
795 vcpu
->arch
.time_page
= NULL
;
798 vcpu
->arch
.time
= data
;
800 /* we verify if the enable bit is set... */
804 /* ...but clean it before doing the actual write */
805 vcpu
->arch
.time_offset
= data
& ~(PAGE_MASK
| 1);
807 vcpu
->arch
.time_page
=
808 gfn_to_page(vcpu
->kvm
, data
>> PAGE_SHIFT
);
810 if (is_error_page(vcpu
->arch
.time_page
)) {
811 kvm_release_page_clean(vcpu
->arch
.time_page
);
812 vcpu
->arch
.time_page
= NULL
;
815 kvm_request_guest_time_update(vcpu
);
819 pr_unimpl(vcpu
, "unhandled wrmsr: 0x%x data %llx\n", msr
, data
);
824 EXPORT_SYMBOL_GPL(kvm_set_msr_common
);
828 * Reads an msr value (of 'msr_index') into 'pdata'.
829 * Returns 0 on success, non-0 otherwise.
830 * Assumes vcpu_load() was already called.
832 int kvm_get_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64
*pdata
)
834 return kvm_x86_ops
->get_msr(vcpu
, msr_index
, pdata
);
837 static int get_msr_mtrr(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
)
839 u64
*p
= (u64
*)&vcpu
->arch
.mtrr_state
.fixed_ranges
;
841 if (!msr_mtrr_valid(msr
))
844 if (msr
== MSR_MTRRdefType
)
845 *pdata
= vcpu
->arch
.mtrr_state
.def_type
+
846 (vcpu
->arch
.mtrr_state
.enabled
<< 10);
847 else if (msr
== MSR_MTRRfix64K_00000
)
849 else if (msr
== MSR_MTRRfix16K_80000
|| msr
== MSR_MTRRfix16K_A0000
)
850 *pdata
= p
[1 + msr
- MSR_MTRRfix16K_80000
];
851 else if (msr
>= MSR_MTRRfix4K_C0000
&& msr
<= MSR_MTRRfix4K_F8000
)
852 *pdata
= p
[3 + msr
- MSR_MTRRfix4K_C0000
];
853 else if (msr
== MSR_IA32_CR_PAT
)
854 *pdata
= vcpu
->arch
.pat
;
855 else { /* Variable MTRRs */
856 int idx
, is_mtrr_mask
;
859 idx
= (msr
- 0x200) / 2;
860 is_mtrr_mask
= msr
- 0x200 - 2 * idx
;
863 (u64
*)&vcpu
->arch
.mtrr_state
.var_ranges
[idx
].base_lo
;
866 (u64
*)&vcpu
->arch
.mtrr_state
.var_ranges
[idx
].mask_lo
;
873 int kvm_get_msr_common(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
)
878 case 0xc0010010: /* SYSCFG */
879 case 0xc0010015: /* HWCR */
880 case MSR_IA32_PLATFORM_ID
:
881 case MSR_IA32_P5_MC_ADDR
:
882 case MSR_IA32_P5_MC_TYPE
:
883 case MSR_IA32_MC0_CTL
:
884 case MSR_IA32_MCG_STATUS
:
885 case MSR_IA32_MCG_CAP
:
886 case MSR_IA32_MCG_CTL
:
887 case MSR_IA32_MC0_MISC
:
888 case MSR_IA32_MC0_MISC
+4:
889 case MSR_IA32_MC0_MISC
+8:
890 case MSR_IA32_MC0_MISC
+12:
891 case MSR_IA32_MC0_MISC
+16:
892 case MSR_IA32_MC0_MISC
+20:
893 case MSR_IA32_UCODE_REV
:
894 case MSR_IA32_EBL_CR_POWERON
:
895 case MSR_IA32_DEBUGCTLMSR
:
896 case MSR_IA32_LASTBRANCHFROMIP
:
897 case MSR_IA32_LASTBRANCHTOIP
:
898 case MSR_IA32_LASTINTFROMIP
:
899 case MSR_IA32_LASTINTTOIP
:
900 case MSR_VM_HSAVE_PA
:
901 case MSR_P6_EVNTSEL0
:
902 case MSR_P6_EVNTSEL1
:
906 data
= 0x500 | KVM_NR_VAR_MTRR
;
908 case 0x200 ... 0x2ff:
909 return get_msr_mtrr(vcpu
, msr
, pdata
);
910 case 0xcd: /* fsb frequency */
913 case MSR_IA32_APICBASE
:
914 data
= kvm_get_apic_base(vcpu
);
916 case MSR_IA32_MISC_ENABLE
:
917 data
= vcpu
->arch
.ia32_misc_enable_msr
;
919 case MSR_IA32_PERF_STATUS
:
920 /* TSC increment by tick */
923 data
|= (((uint64_t)4ULL) << 40);
926 data
= vcpu
->arch
.shadow_efer
;
928 case MSR_KVM_WALL_CLOCK
:
929 data
= vcpu
->kvm
->arch
.wall_clock
;
931 case MSR_KVM_SYSTEM_TIME
:
932 data
= vcpu
->arch
.time
;
935 pr_unimpl(vcpu
, "unhandled rdmsr: 0x%x\n", msr
);
941 EXPORT_SYMBOL_GPL(kvm_get_msr_common
);
944 * Read or write a bunch of msrs. All parameters are kernel addresses.
946 * @return number of msrs set successfully.
948 static int __msr_io(struct kvm_vcpu
*vcpu
, struct kvm_msrs
*msrs
,
949 struct kvm_msr_entry
*entries
,
950 int (*do_msr
)(struct kvm_vcpu
*vcpu
,
951 unsigned index
, u64
*data
))
957 down_read(&vcpu
->kvm
->slots_lock
);
958 for (i
= 0; i
< msrs
->nmsrs
; ++i
)
959 if (do_msr(vcpu
, entries
[i
].index
, &entries
[i
].data
))
961 up_read(&vcpu
->kvm
->slots_lock
);
969 * Read or write a bunch of msrs. Parameters are user addresses.
971 * @return number of msrs set successfully.
973 static int msr_io(struct kvm_vcpu
*vcpu
, struct kvm_msrs __user
*user_msrs
,
974 int (*do_msr
)(struct kvm_vcpu
*vcpu
,
975 unsigned index
, u64
*data
),
978 struct kvm_msrs msrs
;
979 struct kvm_msr_entry
*entries
;
984 if (copy_from_user(&msrs
, user_msrs
, sizeof msrs
))
988 if (msrs
.nmsrs
>= MAX_IO_MSRS
)
992 size
= sizeof(struct kvm_msr_entry
) * msrs
.nmsrs
;
993 entries
= vmalloc(size
);
998 if (copy_from_user(entries
, user_msrs
->entries
, size
))
1001 r
= n
= __msr_io(vcpu
, &msrs
, entries
, do_msr
);
1006 if (writeback
&& copy_to_user(user_msrs
->entries
, entries
, size
))
1017 int kvm_dev_ioctl_check_extension(long ext
)
1022 case KVM_CAP_IRQCHIP
:
1024 case KVM_CAP_MMU_SHADOW_CACHE_CONTROL
:
1025 case KVM_CAP_SET_TSS_ADDR
:
1026 case KVM_CAP_EXT_CPUID
:
1027 case KVM_CAP_CLOCKSOURCE
:
1029 case KVM_CAP_NOP_IO_DELAY
:
1030 case KVM_CAP_MP_STATE
:
1031 case KVM_CAP_SYNC_MMU
:
1032 case KVM_CAP_REINJECT_CONTROL
:
1033 case KVM_CAP_IRQ_INJECT_STATUS
:
1034 case KVM_CAP_ASSIGN_DEV_IRQ
:
1037 case KVM_CAP_COALESCED_MMIO
:
1038 r
= KVM_COALESCED_MMIO_PAGE_OFFSET
;
1041 r
= !kvm_x86_ops
->cpu_has_accelerated_tpr();
1043 case KVM_CAP_NR_VCPUS
:
1046 case KVM_CAP_NR_MEMSLOTS
:
1047 r
= KVM_MEMORY_SLOTS
;
1049 case KVM_CAP_PV_MMU
:
1063 long kvm_arch_dev_ioctl(struct file
*filp
,
1064 unsigned int ioctl
, unsigned long arg
)
1066 void __user
*argp
= (void __user
*)arg
;
1070 case KVM_GET_MSR_INDEX_LIST
: {
1071 struct kvm_msr_list __user
*user_msr_list
= argp
;
1072 struct kvm_msr_list msr_list
;
1076 if (copy_from_user(&msr_list
, user_msr_list
, sizeof msr_list
))
1079 msr_list
.nmsrs
= num_msrs_to_save
+ ARRAY_SIZE(emulated_msrs
);
1080 if (copy_to_user(user_msr_list
, &msr_list
, sizeof msr_list
))
1083 if (n
< num_msrs_to_save
)
1086 if (copy_to_user(user_msr_list
->indices
, &msrs_to_save
,
1087 num_msrs_to_save
* sizeof(u32
)))
1089 if (copy_to_user(user_msr_list
->indices
1090 + num_msrs_to_save
* sizeof(u32
),
1092 ARRAY_SIZE(emulated_msrs
) * sizeof(u32
)))
1097 case KVM_GET_SUPPORTED_CPUID
: {
1098 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
1099 struct kvm_cpuid2 cpuid
;
1102 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1104 r
= kvm_dev_ioctl_get_supported_cpuid(&cpuid
,
1105 cpuid_arg
->entries
);
1110 if (copy_to_user(cpuid_arg
, &cpuid
, sizeof cpuid
))
1122 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
)
1124 kvm_x86_ops
->vcpu_load(vcpu
, cpu
);
1125 kvm_request_guest_time_update(vcpu
);
1128 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
)
1130 kvm_x86_ops
->vcpu_put(vcpu
);
1131 kvm_put_guest_fpu(vcpu
);
1134 static int is_efer_nx(void)
1136 unsigned long long efer
= 0;
1138 rdmsrl_safe(MSR_EFER
, &efer
);
1139 return efer
& EFER_NX
;
1142 static void cpuid_fix_nx_cap(struct kvm_vcpu
*vcpu
)
1145 struct kvm_cpuid_entry2
*e
, *entry
;
1148 for (i
= 0; i
< vcpu
->arch
.cpuid_nent
; ++i
) {
1149 e
= &vcpu
->arch
.cpuid_entries
[i
];
1150 if (e
->function
== 0x80000001) {
1155 if (entry
&& (entry
->edx
& (1 << 20)) && !is_efer_nx()) {
1156 entry
->edx
&= ~(1 << 20);
1157 printk(KERN_INFO
"kvm: guest NX capability removed\n");
1161 /* when an old userspace process fills a new kernel module */
1162 static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu
*vcpu
,
1163 struct kvm_cpuid
*cpuid
,
1164 struct kvm_cpuid_entry __user
*entries
)
1167 struct kvm_cpuid_entry
*cpuid_entries
;
1170 if (cpuid
->nent
> KVM_MAX_CPUID_ENTRIES
)
1173 cpuid_entries
= vmalloc(sizeof(struct kvm_cpuid_entry
) * cpuid
->nent
);
1177 if (copy_from_user(cpuid_entries
, entries
,
1178 cpuid
->nent
* sizeof(struct kvm_cpuid_entry
)))
1180 for (i
= 0; i
< cpuid
->nent
; i
++) {
1181 vcpu
->arch
.cpuid_entries
[i
].function
= cpuid_entries
[i
].function
;
1182 vcpu
->arch
.cpuid_entries
[i
].eax
= cpuid_entries
[i
].eax
;
1183 vcpu
->arch
.cpuid_entries
[i
].ebx
= cpuid_entries
[i
].ebx
;
1184 vcpu
->arch
.cpuid_entries
[i
].ecx
= cpuid_entries
[i
].ecx
;
1185 vcpu
->arch
.cpuid_entries
[i
].edx
= cpuid_entries
[i
].edx
;
1186 vcpu
->arch
.cpuid_entries
[i
].index
= 0;
1187 vcpu
->arch
.cpuid_entries
[i
].flags
= 0;
1188 vcpu
->arch
.cpuid_entries
[i
].padding
[0] = 0;
1189 vcpu
->arch
.cpuid_entries
[i
].padding
[1] = 0;
1190 vcpu
->arch
.cpuid_entries
[i
].padding
[2] = 0;
1192 vcpu
->arch
.cpuid_nent
= cpuid
->nent
;
1193 cpuid_fix_nx_cap(vcpu
);
1197 vfree(cpuid_entries
);
1202 static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu
*vcpu
,
1203 struct kvm_cpuid2
*cpuid
,
1204 struct kvm_cpuid_entry2 __user
*entries
)
1209 if (cpuid
->nent
> KVM_MAX_CPUID_ENTRIES
)
1212 if (copy_from_user(&vcpu
->arch
.cpuid_entries
, entries
,
1213 cpuid
->nent
* sizeof(struct kvm_cpuid_entry2
)))
1215 vcpu
->arch
.cpuid_nent
= cpuid
->nent
;
1222 static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu
*vcpu
,
1223 struct kvm_cpuid2
*cpuid
,
1224 struct kvm_cpuid_entry2 __user
*entries
)
1229 if (cpuid
->nent
< vcpu
->arch
.cpuid_nent
)
1232 if (copy_to_user(entries
, &vcpu
->arch
.cpuid_entries
,
1233 vcpu
->arch
.cpuid_nent
* sizeof(struct kvm_cpuid_entry2
)))
1238 cpuid
->nent
= vcpu
->arch
.cpuid_nent
;
1242 static void do_cpuid_1_ent(struct kvm_cpuid_entry2
*entry
, u32 function
,
1245 entry
->function
= function
;
1246 entry
->index
= index
;
1247 cpuid_count(entry
->function
, entry
->index
,
1248 &entry
->eax
, &entry
->ebx
, &entry
->ecx
, &entry
->edx
);
1252 static void do_cpuid_ent(struct kvm_cpuid_entry2
*entry
, u32 function
,
1253 u32 index
, int *nent
, int maxnent
)
1255 const u32 kvm_supported_word0_x86_features
= bit(X86_FEATURE_FPU
) |
1256 bit(X86_FEATURE_VME
) | bit(X86_FEATURE_DE
) |
1257 bit(X86_FEATURE_PSE
) | bit(X86_FEATURE_TSC
) |
1258 bit(X86_FEATURE_MSR
) | bit(X86_FEATURE_PAE
) |
1259 bit(X86_FEATURE_CX8
) | bit(X86_FEATURE_APIC
) |
1260 bit(X86_FEATURE_SEP
) | bit(X86_FEATURE_PGE
) |
1261 bit(X86_FEATURE_CMOV
) | bit(X86_FEATURE_PSE36
) |
1262 bit(X86_FEATURE_CLFLSH
) | bit(X86_FEATURE_MMX
) |
1263 bit(X86_FEATURE_FXSR
) | bit(X86_FEATURE_XMM
) |
1264 bit(X86_FEATURE_XMM2
) | bit(X86_FEATURE_SELFSNOOP
);
1265 const u32 kvm_supported_word1_x86_features
= bit(X86_FEATURE_FPU
) |
1266 bit(X86_FEATURE_VME
) | bit(X86_FEATURE_DE
) |
1267 bit(X86_FEATURE_PSE
) | bit(X86_FEATURE_TSC
) |
1268 bit(X86_FEATURE_MSR
) | bit(X86_FEATURE_PAE
) |
1269 bit(X86_FEATURE_CX8
) | bit(X86_FEATURE_APIC
) |
1270 bit(X86_FEATURE_PGE
) |
1271 bit(X86_FEATURE_CMOV
) | bit(X86_FEATURE_PSE36
) |
1272 bit(X86_FEATURE_MMX
) | bit(X86_FEATURE_FXSR
) |
1273 bit(X86_FEATURE_SYSCALL
) |
1274 (is_efer_nx() ? bit(X86_FEATURE_NX
) : 0) |
1275 #ifdef CONFIG_X86_64
1276 bit(X86_FEATURE_LM
) |
1278 bit(X86_FEATURE_FXSR_OPT
) |
1279 bit(X86_FEATURE_MMXEXT
) |
1280 bit(X86_FEATURE_3DNOWEXT
) |
1281 bit(X86_FEATURE_3DNOW
);
1282 const u32 kvm_supported_word3_x86_features
=
1283 bit(X86_FEATURE_XMM3
) | bit(X86_FEATURE_CX16
);
1284 const u32 kvm_supported_word6_x86_features
=
1285 bit(X86_FEATURE_LAHF_LM
) | bit(X86_FEATURE_CMP_LEGACY
) |
1286 bit(X86_FEATURE_SVM
);
1288 /* all calls to cpuid_count() should be made on the same cpu */
1290 do_cpuid_1_ent(entry
, function
, index
);
1295 entry
->eax
= min(entry
->eax
, (u32
)0xb);
1298 entry
->edx
&= kvm_supported_word0_x86_features
;
1299 entry
->ecx
&= kvm_supported_word3_x86_features
;
1301 /* function 2 entries are STATEFUL. That is, repeated cpuid commands
1302 * may return different values. This forces us to get_cpu() before
1303 * issuing the first command, and also to emulate this annoying behavior
1304 * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */
1306 int t
, times
= entry
->eax
& 0xff;
1308 entry
->flags
|= KVM_CPUID_FLAG_STATEFUL_FUNC
;
1309 entry
->flags
|= KVM_CPUID_FLAG_STATE_READ_NEXT
;
1310 for (t
= 1; t
< times
&& *nent
< maxnent
; ++t
) {
1311 do_cpuid_1_ent(&entry
[t
], function
, 0);
1312 entry
[t
].flags
|= KVM_CPUID_FLAG_STATEFUL_FUNC
;
1317 /* function 4 and 0xb have additional index. */
1321 entry
->flags
|= KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1322 /* read more entries until cache_type is zero */
1323 for (i
= 1; *nent
< maxnent
; ++i
) {
1324 cache_type
= entry
[i
- 1].eax
& 0x1f;
1327 do_cpuid_1_ent(&entry
[i
], function
, i
);
1329 KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1337 entry
->flags
|= KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1338 /* read more entries until level_type is zero */
1339 for (i
= 1; *nent
< maxnent
; ++i
) {
1340 level_type
= entry
[i
- 1].ecx
& 0xff00;
1343 do_cpuid_1_ent(&entry
[i
], function
, i
);
1345 KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1351 entry
->eax
= min(entry
->eax
, 0x8000001a);
1354 entry
->edx
&= kvm_supported_word1_x86_features
;
1355 entry
->ecx
&= kvm_supported_word6_x86_features
;
1361 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2
*cpuid
,
1362 struct kvm_cpuid_entry2 __user
*entries
)
1364 struct kvm_cpuid_entry2
*cpuid_entries
;
1365 int limit
, nent
= 0, r
= -E2BIG
;
1368 if (cpuid
->nent
< 1)
1371 cpuid_entries
= vmalloc(sizeof(struct kvm_cpuid_entry2
) * cpuid
->nent
);
1375 do_cpuid_ent(&cpuid_entries
[0], 0, 0, &nent
, cpuid
->nent
);
1376 limit
= cpuid_entries
[0].eax
;
1377 for (func
= 1; func
<= limit
&& nent
< cpuid
->nent
; ++func
)
1378 do_cpuid_ent(&cpuid_entries
[nent
], func
, 0,
1379 &nent
, cpuid
->nent
);
1381 if (nent
>= cpuid
->nent
)
1384 do_cpuid_ent(&cpuid_entries
[nent
], 0x80000000, 0, &nent
, cpuid
->nent
);
1385 limit
= cpuid_entries
[nent
- 1].eax
;
1386 for (func
= 0x80000001; func
<= limit
&& nent
< cpuid
->nent
; ++func
)
1387 do_cpuid_ent(&cpuid_entries
[nent
], func
, 0,
1388 &nent
, cpuid
->nent
);
1390 if (copy_to_user(entries
, cpuid_entries
,
1391 nent
* sizeof(struct kvm_cpuid_entry2
)))
1397 vfree(cpuid_entries
);
1402 static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu
*vcpu
,
1403 struct kvm_lapic_state
*s
)
1406 memcpy(s
->regs
, vcpu
->arch
.apic
->regs
, sizeof *s
);
1412 static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu
*vcpu
,
1413 struct kvm_lapic_state
*s
)
1416 memcpy(vcpu
->arch
.apic
->regs
, s
->regs
, sizeof *s
);
1417 kvm_apic_post_state_restore(vcpu
);
1423 static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu
*vcpu
,
1424 struct kvm_interrupt
*irq
)
1426 if (irq
->irq
< 0 || irq
->irq
>= 256)
1428 if (irqchip_in_kernel(vcpu
->kvm
))
1432 set_bit(irq
->irq
, vcpu
->arch
.irq_pending
);
1433 set_bit(irq
->irq
/ BITS_PER_LONG
, &vcpu
->arch
.irq_summary
);
1440 static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu
*vcpu
)
1443 kvm_inject_nmi(vcpu
);
1449 static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu
*vcpu
,
1450 struct kvm_tpr_access_ctl
*tac
)
1454 vcpu
->arch
.tpr_access_reporting
= !!tac
->enabled
;
1458 long kvm_arch_vcpu_ioctl(struct file
*filp
,
1459 unsigned int ioctl
, unsigned long arg
)
1461 struct kvm_vcpu
*vcpu
= filp
->private_data
;
1462 void __user
*argp
= (void __user
*)arg
;
1464 struct kvm_lapic_state
*lapic
= NULL
;
1467 case KVM_GET_LAPIC
: {
1468 lapic
= kzalloc(sizeof(struct kvm_lapic_state
), GFP_KERNEL
);
1473 r
= kvm_vcpu_ioctl_get_lapic(vcpu
, lapic
);
1477 if (copy_to_user(argp
, lapic
, sizeof(struct kvm_lapic_state
)))
1482 case KVM_SET_LAPIC
: {
1483 lapic
= kmalloc(sizeof(struct kvm_lapic_state
), GFP_KERNEL
);
1488 if (copy_from_user(lapic
, argp
, sizeof(struct kvm_lapic_state
)))
1490 r
= kvm_vcpu_ioctl_set_lapic(vcpu
, lapic
);
1496 case KVM_INTERRUPT
: {
1497 struct kvm_interrupt irq
;
1500 if (copy_from_user(&irq
, argp
, sizeof irq
))
1502 r
= kvm_vcpu_ioctl_interrupt(vcpu
, &irq
);
1509 r
= kvm_vcpu_ioctl_nmi(vcpu
);
1515 case KVM_SET_CPUID
: {
1516 struct kvm_cpuid __user
*cpuid_arg
= argp
;
1517 struct kvm_cpuid cpuid
;
1520 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1522 r
= kvm_vcpu_ioctl_set_cpuid(vcpu
, &cpuid
, cpuid_arg
->entries
);
1527 case KVM_SET_CPUID2
: {
1528 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
1529 struct kvm_cpuid2 cpuid
;
1532 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1534 r
= kvm_vcpu_ioctl_set_cpuid2(vcpu
, &cpuid
,
1535 cpuid_arg
->entries
);
1540 case KVM_GET_CPUID2
: {
1541 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
1542 struct kvm_cpuid2 cpuid
;
1545 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1547 r
= kvm_vcpu_ioctl_get_cpuid2(vcpu
, &cpuid
,
1548 cpuid_arg
->entries
);
1552 if (copy_to_user(cpuid_arg
, &cpuid
, sizeof cpuid
))
1558 r
= msr_io(vcpu
, argp
, kvm_get_msr
, 1);
1561 r
= msr_io(vcpu
, argp
, do_set_msr
, 0);
1563 case KVM_TPR_ACCESS_REPORTING
: {
1564 struct kvm_tpr_access_ctl tac
;
1567 if (copy_from_user(&tac
, argp
, sizeof tac
))
1569 r
= vcpu_ioctl_tpr_access_reporting(vcpu
, &tac
);
1573 if (copy_to_user(argp
, &tac
, sizeof tac
))
1578 case KVM_SET_VAPIC_ADDR
: {
1579 struct kvm_vapic_addr va
;
1582 if (!irqchip_in_kernel(vcpu
->kvm
))
1585 if (copy_from_user(&va
, argp
, sizeof va
))
1588 kvm_lapic_set_vapic_addr(vcpu
, va
.vapic_addr
);
1600 static int kvm_vm_ioctl_set_tss_addr(struct kvm
*kvm
, unsigned long addr
)
1604 if (addr
> (unsigned int)(-3 * PAGE_SIZE
))
1606 ret
= kvm_x86_ops
->set_tss_addr(kvm
, addr
);
1610 static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm
*kvm
,
1611 u32 kvm_nr_mmu_pages
)
1613 if (kvm_nr_mmu_pages
< KVM_MIN_ALLOC_MMU_PAGES
)
1616 down_write(&kvm
->slots_lock
);
1618 kvm_mmu_change_mmu_pages(kvm
, kvm_nr_mmu_pages
);
1619 kvm
->arch
.n_requested_mmu_pages
= kvm_nr_mmu_pages
;
1621 up_write(&kvm
->slots_lock
);
1625 static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm
*kvm
)
1627 return kvm
->arch
.n_alloc_mmu_pages
;
1630 gfn_t
unalias_gfn(struct kvm
*kvm
, gfn_t gfn
)
1633 struct kvm_mem_alias
*alias
;
1635 for (i
= 0; i
< kvm
->arch
.naliases
; ++i
) {
1636 alias
= &kvm
->arch
.aliases
[i
];
1637 if (gfn
>= alias
->base_gfn
1638 && gfn
< alias
->base_gfn
+ alias
->npages
)
1639 return alias
->target_gfn
+ gfn
- alias
->base_gfn
;
1645 * Set a new alias region. Aliases map a portion of physical memory into
1646 * another portion. This is useful for memory windows, for example the PC
1649 static int kvm_vm_ioctl_set_memory_alias(struct kvm
*kvm
,
1650 struct kvm_memory_alias
*alias
)
1653 struct kvm_mem_alias
*p
;
1656 /* General sanity checks */
1657 if (alias
->memory_size
& (PAGE_SIZE
- 1))
1659 if (alias
->guest_phys_addr
& (PAGE_SIZE
- 1))
1661 if (alias
->slot
>= KVM_ALIAS_SLOTS
)
1663 if (alias
->guest_phys_addr
+ alias
->memory_size
1664 < alias
->guest_phys_addr
)
1666 if (alias
->target_phys_addr
+ alias
->memory_size
1667 < alias
->target_phys_addr
)
1670 down_write(&kvm
->slots_lock
);
1671 spin_lock(&kvm
->mmu_lock
);
1673 p
= &kvm
->arch
.aliases
[alias
->slot
];
1674 p
->base_gfn
= alias
->guest_phys_addr
>> PAGE_SHIFT
;
1675 p
->npages
= alias
->memory_size
>> PAGE_SHIFT
;
1676 p
->target_gfn
= alias
->target_phys_addr
>> PAGE_SHIFT
;
1678 for (n
= KVM_ALIAS_SLOTS
; n
> 0; --n
)
1679 if (kvm
->arch
.aliases
[n
- 1].npages
)
1681 kvm
->arch
.naliases
= n
;
1683 spin_unlock(&kvm
->mmu_lock
);
1684 kvm_mmu_zap_all(kvm
);
1686 up_write(&kvm
->slots_lock
);
1694 static int kvm_vm_ioctl_get_irqchip(struct kvm
*kvm
, struct kvm_irqchip
*chip
)
1699 switch (chip
->chip_id
) {
1700 case KVM_IRQCHIP_PIC_MASTER
:
1701 memcpy(&chip
->chip
.pic
,
1702 &pic_irqchip(kvm
)->pics
[0],
1703 sizeof(struct kvm_pic_state
));
1705 case KVM_IRQCHIP_PIC_SLAVE
:
1706 memcpy(&chip
->chip
.pic
,
1707 &pic_irqchip(kvm
)->pics
[1],
1708 sizeof(struct kvm_pic_state
));
1710 case KVM_IRQCHIP_IOAPIC
:
1711 memcpy(&chip
->chip
.ioapic
,
1712 ioapic_irqchip(kvm
),
1713 sizeof(struct kvm_ioapic_state
));
1722 static int kvm_vm_ioctl_set_irqchip(struct kvm
*kvm
, struct kvm_irqchip
*chip
)
1727 switch (chip
->chip_id
) {
1728 case KVM_IRQCHIP_PIC_MASTER
:
1729 memcpy(&pic_irqchip(kvm
)->pics
[0],
1731 sizeof(struct kvm_pic_state
));
1733 case KVM_IRQCHIP_PIC_SLAVE
:
1734 memcpy(&pic_irqchip(kvm
)->pics
[1],
1736 sizeof(struct kvm_pic_state
));
1738 case KVM_IRQCHIP_IOAPIC
:
1739 memcpy(ioapic_irqchip(kvm
),
1741 sizeof(struct kvm_ioapic_state
));
1747 kvm_pic_update_irq(pic_irqchip(kvm
));
1751 static int kvm_vm_ioctl_get_pit(struct kvm
*kvm
, struct kvm_pit_state
*ps
)
1755 memcpy(ps
, &kvm
->arch
.vpit
->pit_state
, sizeof(struct kvm_pit_state
));
1759 static int kvm_vm_ioctl_set_pit(struct kvm
*kvm
, struct kvm_pit_state
*ps
)
1763 memcpy(&kvm
->arch
.vpit
->pit_state
, ps
, sizeof(struct kvm_pit_state
));
1764 kvm_pit_load_count(kvm
, 0, ps
->channels
[0].count
);
1768 static int kvm_vm_ioctl_reinject(struct kvm
*kvm
,
1769 struct kvm_reinject_control
*control
)
1771 if (!kvm
->arch
.vpit
)
1773 kvm
->arch
.vpit
->pit_state
.pit_timer
.reinject
= control
->pit_reinject
;
1778 * Get (and clear) the dirty memory log for a memory slot.
1780 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
,
1781 struct kvm_dirty_log
*log
)
1785 struct kvm_memory_slot
*memslot
;
1788 down_write(&kvm
->slots_lock
);
1790 r
= kvm_get_dirty_log(kvm
, log
, &is_dirty
);
1794 /* If nothing is dirty, don't bother messing with page tables. */
1796 kvm_mmu_slot_remove_write_access(kvm
, log
->slot
);
1797 kvm_flush_remote_tlbs(kvm
);
1798 memslot
= &kvm
->memslots
[log
->slot
];
1799 n
= ALIGN(memslot
->npages
, BITS_PER_LONG
) / 8;
1800 memset(memslot
->dirty_bitmap
, 0, n
);
1804 up_write(&kvm
->slots_lock
);
1808 long kvm_arch_vm_ioctl(struct file
*filp
,
1809 unsigned int ioctl
, unsigned long arg
)
1811 struct kvm
*kvm
= filp
->private_data
;
1812 void __user
*argp
= (void __user
*)arg
;
1815 * This union makes it completely explicit to gcc-3.x
1816 * that these two variables' stack usage should be
1817 * combined, not added together.
1820 struct kvm_pit_state ps
;
1821 struct kvm_memory_alias alias
;
1825 case KVM_SET_TSS_ADDR
:
1826 r
= kvm_vm_ioctl_set_tss_addr(kvm
, arg
);
1830 case KVM_SET_MEMORY_REGION
: {
1831 struct kvm_memory_region kvm_mem
;
1832 struct kvm_userspace_memory_region kvm_userspace_mem
;
1835 if (copy_from_user(&kvm_mem
, argp
, sizeof kvm_mem
))
1837 kvm_userspace_mem
.slot
= kvm_mem
.slot
;
1838 kvm_userspace_mem
.flags
= kvm_mem
.flags
;
1839 kvm_userspace_mem
.guest_phys_addr
= kvm_mem
.guest_phys_addr
;
1840 kvm_userspace_mem
.memory_size
= kvm_mem
.memory_size
;
1841 r
= kvm_vm_ioctl_set_memory_region(kvm
, &kvm_userspace_mem
, 0);
1846 case KVM_SET_NR_MMU_PAGES
:
1847 r
= kvm_vm_ioctl_set_nr_mmu_pages(kvm
, arg
);
1851 case KVM_GET_NR_MMU_PAGES
:
1852 r
= kvm_vm_ioctl_get_nr_mmu_pages(kvm
);
1854 case KVM_SET_MEMORY_ALIAS
:
1856 if (copy_from_user(&u
.alias
, argp
, sizeof(struct kvm_memory_alias
)))
1858 r
= kvm_vm_ioctl_set_memory_alias(kvm
, &u
.alias
);
1862 case KVM_CREATE_IRQCHIP
:
1864 kvm
->arch
.vpic
= kvm_create_pic(kvm
);
1865 if (kvm
->arch
.vpic
) {
1866 r
= kvm_ioapic_init(kvm
);
1868 kfree(kvm
->arch
.vpic
);
1869 kvm
->arch
.vpic
= NULL
;
1874 r
= kvm_setup_default_irq_routing(kvm
);
1876 kfree(kvm
->arch
.vpic
);
1877 kfree(kvm
->arch
.vioapic
);
1881 case KVM_CREATE_PIT
:
1882 mutex_lock(&kvm
->lock
);
1885 goto create_pit_unlock
;
1887 kvm
->arch
.vpit
= kvm_create_pit(kvm
);
1891 mutex_unlock(&kvm
->lock
);
1893 case KVM_IRQ_LINE_STATUS
:
1894 case KVM_IRQ_LINE
: {
1895 struct kvm_irq_level irq_event
;
1898 if (copy_from_user(&irq_event
, argp
, sizeof irq_event
))
1900 if (irqchip_in_kernel(kvm
)) {
1902 mutex_lock(&kvm
->lock
);
1903 status
= kvm_set_irq(kvm
, KVM_USERSPACE_IRQ_SOURCE_ID
,
1904 irq_event
.irq
, irq_event
.level
);
1905 mutex_unlock(&kvm
->lock
);
1906 if (ioctl
== KVM_IRQ_LINE_STATUS
) {
1907 irq_event
.status
= status
;
1908 if (copy_to_user(argp
, &irq_event
,
1916 case KVM_GET_IRQCHIP
: {
1917 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1918 struct kvm_irqchip
*chip
= kmalloc(sizeof(*chip
), GFP_KERNEL
);
1924 if (copy_from_user(chip
, argp
, sizeof *chip
))
1925 goto get_irqchip_out
;
1927 if (!irqchip_in_kernel(kvm
))
1928 goto get_irqchip_out
;
1929 r
= kvm_vm_ioctl_get_irqchip(kvm
, chip
);
1931 goto get_irqchip_out
;
1933 if (copy_to_user(argp
, chip
, sizeof *chip
))
1934 goto get_irqchip_out
;
1942 case KVM_SET_IRQCHIP
: {
1943 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1944 struct kvm_irqchip
*chip
= kmalloc(sizeof(*chip
), GFP_KERNEL
);
1950 if (copy_from_user(chip
, argp
, sizeof *chip
))
1951 goto set_irqchip_out
;
1953 if (!irqchip_in_kernel(kvm
))
1954 goto set_irqchip_out
;
1955 r
= kvm_vm_ioctl_set_irqchip(kvm
, chip
);
1957 goto set_irqchip_out
;
1967 if (copy_from_user(&u
.ps
, argp
, sizeof(struct kvm_pit_state
)))
1970 if (!kvm
->arch
.vpit
)
1972 r
= kvm_vm_ioctl_get_pit(kvm
, &u
.ps
);
1976 if (copy_to_user(argp
, &u
.ps
, sizeof(struct kvm_pit_state
)))
1983 if (copy_from_user(&u
.ps
, argp
, sizeof u
.ps
))
1986 if (!kvm
->arch
.vpit
)
1988 r
= kvm_vm_ioctl_set_pit(kvm
, &u
.ps
);
1994 case KVM_REINJECT_CONTROL
: {
1995 struct kvm_reinject_control control
;
1997 if (copy_from_user(&control
, argp
, sizeof(control
)))
1999 r
= kvm_vm_ioctl_reinject(kvm
, &control
);
2012 static void kvm_init_msr_list(void)
2017 for (i
= j
= 0; i
< ARRAY_SIZE(msrs_to_save
); i
++) {
2018 if (rdmsr_safe(msrs_to_save
[i
], &dummy
[0], &dummy
[1]) < 0)
2021 msrs_to_save
[j
] = msrs_to_save
[i
];
2024 num_msrs_to_save
= j
;
2028 * Only apic need an MMIO device hook, so shortcut now..
2030 static struct kvm_io_device
*vcpu_find_pervcpu_dev(struct kvm_vcpu
*vcpu
,
2031 gpa_t addr
, int len
,
2034 struct kvm_io_device
*dev
;
2036 if (vcpu
->arch
.apic
) {
2037 dev
= &vcpu
->arch
.apic
->dev
;
2038 if (dev
->in_range(dev
, addr
, len
, is_write
))
2045 static struct kvm_io_device
*vcpu_find_mmio_dev(struct kvm_vcpu
*vcpu
,
2046 gpa_t addr
, int len
,
2049 struct kvm_io_device
*dev
;
2051 dev
= vcpu_find_pervcpu_dev(vcpu
, addr
, len
, is_write
);
2053 dev
= kvm_io_bus_find_dev(&vcpu
->kvm
->mmio_bus
, addr
, len
,
2058 static int kvm_read_guest_virt(gva_t addr
, void *val
, unsigned int bytes
,
2059 struct kvm_vcpu
*vcpu
)
2062 int r
= X86EMUL_CONTINUE
;
2065 gpa_t gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
2066 unsigned offset
= addr
& (PAGE_SIZE
-1);
2067 unsigned toread
= min(bytes
, (unsigned)PAGE_SIZE
- offset
);
2070 if (gpa
== UNMAPPED_GVA
) {
2071 r
= X86EMUL_PROPAGATE_FAULT
;
2074 ret
= kvm_read_guest(vcpu
->kvm
, gpa
, data
, toread
);
2076 r
= X86EMUL_UNHANDLEABLE
;
2088 static int kvm_write_guest_virt(gva_t addr
, void *val
, unsigned int bytes
,
2089 struct kvm_vcpu
*vcpu
)
2092 int r
= X86EMUL_CONTINUE
;
2095 gpa_t gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
2096 unsigned offset
= addr
& (PAGE_SIZE
-1);
2097 unsigned towrite
= min(bytes
, (unsigned)PAGE_SIZE
- offset
);
2100 if (gpa
== UNMAPPED_GVA
) {
2101 r
= X86EMUL_PROPAGATE_FAULT
;
2104 ret
= kvm_write_guest(vcpu
->kvm
, gpa
, data
, towrite
);
2106 r
= X86EMUL_UNHANDLEABLE
;
2119 static int emulator_read_emulated(unsigned long addr
,
2122 struct kvm_vcpu
*vcpu
)
2124 struct kvm_io_device
*mmio_dev
;
2127 if (vcpu
->mmio_read_completed
) {
2128 memcpy(val
, vcpu
->mmio_data
, bytes
);
2129 vcpu
->mmio_read_completed
= 0;
2130 return X86EMUL_CONTINUE
;
2133 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
2135 /* For APIC access vmexit */
2136 if ((gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
2139 if (kvm_read_guest_virt(addr
, val
, bytes
, vcpu
)
2140 == X86EMUL_CONTINUE
)
2141 return X86EMUL_CONTINUE
;
2142 if (gpa
== UNMAPPED_GVA
)
2143 return X86EMUL_PROPAGATE_FAULT
;
2147 * Is this MMIO handled locally?
2149 mutex_lock(&vcpu
->kvm
->lock
);
2150 mmio_dev
= vcpu_find_mmio_dev(vcpu
, gpa
, bytes
, 0);
2152 kvm_iodevice_read(mmio_dev
, gpa
, bytes
, val
);
2153 mutex_unlock(&vcpu
->kvm
->lock
);
2154 return X86EMUL_CONTINUE
;
2156 mutex_unlock(&vcpu
->kvm
->lock
);
2158 vcpu
->mmio_needed
= 1;
2159 vcpu
->mmio_phys_addr
= gpa
;
2160 vcpu
->mmio_size
= bytes
;
2161 vcpu
->mmio_is_write
= 0;
2163 return X86EMUL_UNHANDLEABLE
;
2166 int emulator_write_phys(struct kvm_vcpu
*vcpu
, gpa_t gpa
,
2167 const void *val
, int bytes
)
2171 ret
= kvm_write_guest(vcpu
->kvm
, gpa
, val
, bytes
);
2174 kvm_mmu_pte_write(vcpu
, gpa
, val
, bytes
, 1);
2178 static int emulator_write_emulated_onepage(unsigned long addr
,
2181 struct kvm_vcpu
*vcpu
)
2183 struct kvm_io_device
*mmio_dev
;
2186 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
2188 if (gpa
== UNMAPPED_GVA
) {
2189 kvm_inject_page_fault(vcpu
, addr
, 2);
2190 return X86EMUL_PROPAGATE_FAULT
;
2193 /* For APIC access vmexit */
2194 if ((gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
2197 if (emulator_write_phys(vcpu
, gpa
, val
, bytes
))
2198 return X86EMUL_CONTINUE
;
2202 * Is this MMIO handled locally?
2204 mutex_lock(&vcpu
->kvm
->lock
);
2205 mmio_dev
= vcpu_find_mmio_dev(vcpu
, gpa
, bytes
, 1);
2207 kvm_iodevice_write(mmio_dev
, gpa
, bytes
, val
);
2208 mutex_unlock(&vcpu
->kvm
->lock
);
2209 return X86EMUL_CONTINUE
;
2211 mutex_unlock(&vcpu
->kvm
->lock
);
2213 vcpu
->mmio_needed
= 1;
2214 vcpu
->mmio_phys_addr
= gpa
;
2215 vcpu
->mmio_size
= bytes
;
2216 vcpu
->mmio_is_write
= 1;
2217 memcpy(vcpu
->mmio_data
, val
, bytes
);
2219 return X86EMUL_CONTINUE
;
2222 int emulator_write_emulated(unsigned long addr
,
2225 struct kvm_vcpu
*vcpu
)
2227 /* Crossing a page boundary? */
2228 if (((addr
+ bytes
- 1) ^ addr
) & PAGE_MASK
) {
2231 now
= -addr
& ~PAGE_MASK
;
2232 rc
= emulator_write_emulated_onepage(addr
, val
, now
, vcpu
);
2233 if (rc
!= X86EMUL_CONTINUE
)
2239 return emulator_write_emulated_onepage(addr
, val
, bytes
, vcpu
);
2241 EXPORT_SYMBOL_GPL(emulator_write_emulated
);
2243 static int emulator_cmpxchg_emulated(unsigned long addr
,
2247 struct kvm_vcpu
*vcpu
)
2249 static int reported
;
2253 printk(KERN_WARNING
"kvm: emulating exchange as write\n");
2255 #ifndef CONFIG_X86_64
2256 /* guests cmpxchg8b have to be emulated atomically */
2263 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
2265 if (gpa
== UNMAPPED_GVA
||
2266 (gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
2269 if (((gpa
+ bytes
- 1) & PAGE_MASK
) != (gpa
& PAGE_MASK
))
2274 page
= gfn_to_page(vcpu
->kvm
, gpa
>> PAGE_SHIFT
);
2276 kaddr
= kmap_atomic(page
, KM_USER0
);
2277 set_64bit((u64
*)(kaddr
+ offset_in_page(gpa
)), val
);
2278 kunmap_atomic(kaddr
, KM_USER0
);
2279 kvm_release_page_dirty(page
);
2284 return emulator_write_emulated(addr
, new, bytes
, vcpu
);
2287 static unsigned long get_segment_base(struct kvm_vcpu
*vcpu
, int seg
)
2289 return kvm_x86_ops
->get_segment_base(vcpu
, seg
);
2292 int emulate_invlpg(struct kvm_vcpu
*vcpu
, gva_t address
)
2294 kvm_mmu_invlpg(vcpu
, address
);
2295 return X86EMUL_CONTINUE
;
2298 int emulate_clts(struct kvm_vcpu
*vcpu
)
2300 KVMTRACE_0D(CLTS
, vcpu
, handler
);
2301 kvm_x86_ops
->set_cr0(vcpu
, vcpu
->arch
.cr0
& ~X86_CR0_TS
);
2302 return X86EMUL_CONTINUE
;
2305 int emulator_get_dr(struct x86_emulate_ctxt
*ctxt
, int dr
, unsigned long *dest
)
2307 struct kvm_vcpu
*vcpu
= ctxt
->vcpu
;
2311 *dest
= kvm_x86_ops
->get_dr(vcpu
, dr
);
2312 return X86EMUL_CONTINUE
;
2314 pr_unimpl(vcpu
, "%s: unexpected dr %u\n", __func__
, dr
);
2315 return X86EMUL_UNHANDLEABLE
;
2319 int emulator_set_dr(struct x86_emulate_ctxt
*ctxt
, int dr
, unsigned long value
)
2321 unsigned long mask
= (ctxt
->mode
== X86EMUL_MODE_PROT64
) ? ~0ULL : ~0U;
2324 kvm_x86_ops
->set_dr(ctxt
->vcpu
, dr
, value
& mask
, &exception
);
2326 /* FIXME: better handling */
2327 return X86EMUL_UNHANDLEABLE
;
2329 return X86EMUL_CONTINUE
;
2332 void kvm_report_emulation_failure(struct kvm_vcpu
*vcpu
, const char *context
)
2335 unsigned long rip
= kvm_rip_read(vcpu
);
2336 unsigned long rip_linear
;
2338 if (!printk_ratelimit())
2341 rip_linear
= rip
+ get_segment_base(vcpu
, VCPU_SREG_CS
);
2343 kvm_read_guest_virt(rip_linear
, (void *)opcodes
, 4, vcpu
);
2345 printk(KERN_ERR
"emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
2346 context
, rip
, opcodes
[0], opcodes
[1], opcodes
[2], opcodes
[3]);
2348 EXPORT_SYMBOL_GPL(kvm_report_emulation_failure
);
2350 static struct x86_emulate_ops emulate_ops
= {
2351 .read_std
= kvm_read_guest_virt
,
2352 .read_emulated
= emulator_read_emulated
,
2353 .write_emulated
= emulator_write_emulated
,
2354 .cmpxchg_emulated
= emulator_cmpxchg_emulated
,
2357 static void cache_all_regs(struct kvm_vcpu
*vcpu
)
2359 kvm_register_read(vcpu
, VCPU_REGS_RAX
);
2360 kvm_register_read(vcpu
, VCPU_REGS_RSP
);
2361 kvm_register_read(vcpu
, VCPU_REGS_RIP
);
2362 vcpu
->arch
.regs_dirty
= ~0;
2365 int emulate_instruction(struct kvm_vcpu
*vcpu
,
2366 struct kvm_run
*run
,
2372 struct decode_cache
*c
;
2374 kvm_clear_exception_queue(vcpu
);
2375 vcpu
->arch
.mmio_fault_cr2
= cr2
;
2377 * TODO: fix x86_emulate.c to use guest_read/write_register
2378 * instead of direct ->regs accesses, can save hundred cycles
2379 * on Intel for instructions that don't read/change RSP, for
2382 cache_all_regs(vcpu
);
2384 vcpu
->mmio_is_write
= 0;
2385 vcpu
->arch
.pio
.string
= 0;
2387 if (!(emulation_type
& EMULTYPE_NO_DECODE
)) {
2389 kvm_x86_ops
->get_cs_db_l_bits(vcpu
, &cs_db
, &cs_l
);
2391 vcpu
->arch
.emulate_ctxt
.vcpu
= vcpu
;
2392 vcpu
->arch
.emulate_ctxt
.eflags
= kvm_x86_ops
->get_rflags(vcpu
);
2393 vcpu
->arch
.emulate_ctxt
.mode
=
2394 (vcpu
->arch
.emulate_ctxt
.eflags
& X86_EFLAGS_VM
)
2395 ? X86EMUL_MODE_REAL
: cs_l
2396 ? X86EMUL_MODE_PROT64
: cs_db
2397 ? X86EMUL_MODE_PROT32
: X86EMUL_MODE_PROT16
;
2399 r
= x86_decode_insn(&vcpu
->arch
.emulate_ctxt
, &emulate_ops
);
2401 /* Reject the instructions other than VMCALL/VMMCALL when
2402 * try to emulate invalid opcode */
2403 c
= &vcpu
->arch
.emulate_ctxt
.decode
;
2404 if ((emulation_type
& EMULTYPE_TRAP_UD
) &&
2405 (!(c
->twobyte
&& c
->b
== 0x01 &&
2406 (c
->modrm_reg
== 0 || c
->modrm_reg
== 3) &&
2407 c
->modrm_mod
== 3 && c
->modrm_rm
== 1)))
2408 return EMULATE_FAIL
;
2410 ++vcpu
->stat
.insn_emulation
;
2412 ++vcpu
->stat
.insn_emulation_fail
;
2413 if (kvm_mmu_unprotect_page_virt(vcpu
, cr2
))
2414 return EMULATE_DONE
;
2415 return EMULATE_FAIL
;
2419 r
= x86_emulate_insn(&vcpu
->arch
.emulate_ctxt
, &emulate_ops
);
2421 if (vcpu
->arch
.pio
.string
)
2422 return EMULATE_DO_MMIO
;
2424 if ((r
|| vcpu
->mmio_is_write
) && run
) {
2425 run
->exit_reason
= KVM_EXIT_MMIO
;
2426 run
->mmio
.phys_addr
= vcpu
->mmio_phys_addr
;
2427 memcpy(run
->mmio
.data
, vcpu
->mmio_data
, 8);
2428 run
->mmio
.len
= vcpu
->mmio_size
;
2429 run
->mmio
.is_write
= vcpu
->mmio_is_write
;
2433 if (kvm_mmu_unprotect_page_virt(vcpu
, cr2
))
2434 return EMULATE_DONE
;
2435 if (!vcpu
->mmio_needed
) {
2436 kvm_report_emulation_failure(vcpu
, "mmio");
2437 return EMULATE_FAIL
;
2439 return EMULATE_DO_MMIO
;
2442 kvm_x86_ops
->set_rflags(vcpu
, vcpu
->arch
.emulate_ctxt
.eflags
);
2444 if (vcpu
->mmio_is_write
) {
2445 vcpu
->mmio_needed
= 0;
2446 return EMULATE_DO_MMIO
;
2449 return EMULATE_DONE
;
2451 EXPORT_SYMBOL_GPL(emulate_instruction
);
2453 static int pio_copy_data(struct kvm_vcpu
*vcpu
)
2455 void *p
= vcpu
->arch
.pio_data
;
2456 gva_t q
= vcpu
->arch
.pio
.guest_gva
;
2460 bytes
= vcpu
->arch
.pio
.size
* vcpu
->arch
.pio
.cur_count
;
2461 if (vcpu
->arch
.pio
.in
)
2462 ret
= kvm_write_guest_virt(q
, p
, bytes
, vcpu
);
2464 ret
= kvm_read_guest_virt(q
, p
, bytes
, vcpu
);
2468 int complete_pio(struct kvm_vcpu
*vcpu
)
2470 struct kvm_pio_request
*io
= &vcpu
->arch
.pio
;
2477 val
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
2478 memcpy(&val
, vcpu
->arch
.pio_data
, io
->size
);
2479 kvm_register_write(vcpu
, VCPU_REGS_RAX
, val
);
2483 r
= pio_copy_data(vcpu
);
2490 delta
*= io
->cur_count
;
2492 * The size of the register should really depend on
2493 * current address size.
2495 val
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
2497 kvm_register_write(vcpu
, VCPU_REGS_RCX
, val
);
2503 val
= kvm_register_read(vcpu
, VCPU_REGS_RDI
);
2505 kvm_register_write(vcpu
, VCPU_REGS_RDI
, val
);
2507 val
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
2509 kvm_register_write(vcpu
, VCPU_REGS_RSI
, val
);
2513 io
->count
-= io
->cur_count
;
2519 static void kernel_pio(struct kvm_io_device
*pio_dev
,
2520 struct kvm_vcpu
*vcpu
,
2523 /* TODO: String I/O for in kernel device */
2525 mutex_lock(&vcpu
->kvm
->lock
);
2526 if (vcpu
->arch
.pio
.in
)
2527 kvm_iodevice_read(pio_dev
, vcpu
->arch
.pio
.port
,
2528 vcpu
->arch
.pio
.size
,
2531 kvm_iodevice_write(pio_dev
, vcpu
->arch
.pio
.port
,
2532 vcpu
->arch
.pio
.size
,
2534 mutex_unlock(&vcpu
->kvm
->lock
);
2537 static void pio_string_write(struct kvm_io_device
*pio_dev
,
2538 struct kvm_vcpu
*vcpu
)
2540 struct kvm_pio_request
*io
= &vcpu
->arch
.pio
;
2541 void *pd
= vcpu
->arch
.pio_data
;
2544 mutex_lock(&vcpu
->kvm
->lock
);
2545 for (i
= 0; i
< io
->cur_count
; i
++) {
2546 kvm_iodevice_write(pio_dev
, io
->port
,
2551 mutex_unlock(&vcpu
->kvm
->lock
);
2554 static struct kvm_io_device
*vcpu_find_pio_dev(struct kvm_vcpu
*vcpu
,
2555 gpa_t addr
, int len
,
2558 return kvm_io_bus_find_dev(&vcpu
->kvm
->pio_bus
, addr
, len
, is_write
);
2561 int kvm_emulate_pio(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
, int in
,
2562 int size
, unsigned port
)
2564 struct kvm_io_device
*pio_dev
;
2567 vcpu
->run
->exit_reason
= KVM_EXIT_IO
;
2568 vcpu
->run
->io
.direction
= in
? KVM_EXIT_IO_IN
: KVM_EXIT_IO_OUT
;
2569 vcpu
->run
->io
.size
= vcpu
->arch
.pio
.size
= size
;
2570 vcpu
->run
->io
.data_offset
= KVM_PIO_PAGE_OFFSET
* PAGE_SIZE
;
2571 vcpu
->run
->io
.count
= vcpu
->arch
.pio
.count
= vcpu
->arch
.pio
.cur_count
= 1;
2572 vcpu
->run
->io
.port
= vcpu
->arch
.pio
.port
= port
;
2573 vcpu
->arch
.pio
.in
= in
;
2574 vcpu
->arch
.pio
.string
= 0;
2575 vcpu
->arch
.pio
.down
= 0;
2576 vcpu
->arch
.pio
.rep
= 0;
2578 if (vcpu
->run
->io
.direction
== KVM_EXIT_IO_IN
)
2579 KVMTRACE_2D(IO_READ
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2582 KVMTRACE_2D(IO_WRITE
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2585 val
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
2586 memcpy(vcpu
->arch
.pio_data
, &val
, 4);
2588 pio_dev
= vcpu_find_pio_dev(vcpu
, port
, size
, !in
);
2590 kernel_pio(pio_dev
, vcpu
, vcpu
->arch
.pio_data
);
2596 EXPORT_SYMBOL_GPL(kvm_emulate_pio
);
2598 int kvm_emulate_pio_string(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
, int in
,
2599 int size
, unsigned long count
, int down
,
2600 gva_t address
, int rep
, unsigned port
)
2602 unsigned now
, in_page
;
2604 struct kvm_io_device
*pio_dev
;
2606 vcpu
->run
->exit_reason
= KVM_EXIT_IO
;
2607 vcpu
->run
->io
.direction
= in
? KVM_EXIT_IO_IN
: KVM_EXIT_IO_OUT
;
2608 vcpu
->run
->io
.size
= vcpu
->arch
.pio
.size
= size
;
2609 vcpu
->run
->io
.data_offset
= KVM_PIO_PAGE_OFFSET
* PAGE_SIZE
;
2610 vcpu
->run
->io
.count
= vcpu
->arch
.pio
.count
= vcpu
->arch
.pio
.cur_count
= count
;
2611 vcpu
->run
->io
.port
= vcpu
->arch
.pio
.port
= port
;
2612 vcpu
->arch
.pio
.in
= in
;
2613 vcpu
->arch
.pio
.string
= 1;
2614 vcpu
->arch
.pio
.down
= down
;
2615 vcpu
->arch
.pio
.rep
= rep
;
2617 if (vcpu
->run
->io
.direction
== KVM_EXIT_IO_IN
)
2618 KVMTRACE_2D(IO_READ
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2621 KVMTRACE_2D(IO_WRITE
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2625 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
2630 in_page
= PAGE_SIZE
- offset_in_page(address
);
2632 in_page
= offset_in_page(address
) + size
;
2633 now
= min(count
, (unsigned long)in_page
/ size
);
2638 * String I/O in reverse. Yuck. Kill the guest, fix later.
2640 pr_unimpl(vcpu
, "guest string pio down\n");
2641 kvm_inject_gp(vcpu
, 0);
2644 vcpu
->run
->io
.count
= now
;
2645 vcpu
->arch
.pio
.cur_count
= now
;
2647 if (vcpu
->arch
.pio
.cur_count
== vcpu
->arch
.pio
.count
)
2648 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
2650 vcpu
->arch
.pio
.guest_gva
= address
;
2652 pio_dev
= vcpu_find_pio_dev(vcpu
, port
,
2653 vcpu
->arch
.pio
.cur_count
,
2654 !vcpu
->arch
.pio
.in
);
2655 if (!vcpu
->arch
.pio
.in
) {
2656 /* string PIO write */
2657 ret
= pio_copy_data(vcpu
);
2658 if (ret
== X86EMUL_PROPAGATE_FAULT
) {
2659 kvm_inject_gp(vcpu
, 0);
2662 if (ret
== 0 && pio_dev
) {
2663 pio_string_write(pio_dev
, vcpu
);
2665 if (vcpu
->arch
.pio
.count
== 0)
2669 pr_unimpl(vcpu
, "no string pio read support yet, "
2670 "port %x size %d count %ld\n",
2675 EXPORT_SYMBOL_GPL(kvm_emulate_pio_string
);
2677 static void bounce_off(void *info
)
2682 static unsigned int ref_freq
;
2683 static unsigned long tsc_khz_ref
;
2685 static int kvmclock_cpufreq_notifier(struct notifier_block
*nb
, unsigned long val
,
2688 struct cpufreq_freqs
*freq
= data
;
2690 struct kvm_vcpu
*vcpu
;
2691 int i
, send_ipi
= 0;
2694 ref_freq
= freq
->old
;
2696 if (val
== CPUFREQ_PRECHANGE
&& freq
->old
> freq
->new)
2698 if (val
== CPUFREQ_POSTCHANGE
&& freq
->old
< freq
->new)
2700 per_cpu(cpu_tsc_khz
, freq
->cpu
) = cpufreq_scale(tsc_khz_ref
, ref_freq
, freq
->new);
2702 spin_lock(&kvm_lock
);
2703 list_for_each_entry(kvm
, &vm_list
, vm_list
) {
2704 for (i
= 0; i
< KVM_MAX_VCPUS
; ++i
) {
2705 vcpu
= kvm
->vcpus
[i
];
2708 if (vcpu
->cpu
!= freq
->cpu
)
2710 if (!kvm_request_guest_time_update(vcpu
))
2712 if (vcpu
->cpu
!= smp_processor_id())
2716 spin_unlock(&kvm_lock
);
2718 if (freq
->old
< freq
->new && send_ipi
) {
2720 * We upscale the frequency. Must make the guest
2721 * doesn't see old kvmclock values while running with
2722 * the new frequency, otherwise we risk the guest sees
2723 * time go backwards.
2725 * In case we update the frequency for another cpu
2726 * (which might be in guest context) send an interrupt
2727 * to kick the cpu out of guest context. Next time
2728 * guest context is entered kvmclock will be updated,
2729 * so the guest will not see stale values.
2731 smp_call_function_single(freq
->cpu
, bounce_off
, NULL
, 1);
2736 static struct notifier_block kvmclock_cpufreq_notifier_block
= {
2737 .notifier_call
= kvmclock_cpufreq_notifier
2740 int kvm_arch_init(void *opaque
)
2743 struct kvm_x86_ops
*ops
= (struct kvm_x86_ops
*)opaque
;
2746 printk(KERN_ERR
"kvm: already loaded the other module\n");
2751 if (!ops
->cpu_has_kvm_support()) {
2752 printk(KERN_ERR
"kvm: no hardware support\n");
2756 if (ops
->disabled_by_bios()) {
2757 printk(KERN_ERR
"kvm: disabled by bios\n");
2762 r
= kvm_mmu_module_init();
2766 kvm_init_msr_list();
2769 kvm_mmu_set_nonpresent_ptes(0ull, 0ull);
2770 kvm_mmu_set_base_ptes(PT_PRESENT_MASK
);
2771 kvm_mmu_set_mask_ptes(PT_USER_MASK
, PT_ACCESSED_MASK
,
2772 PT_DIRTY_MASK
, PT64_NX_MASK
, 0, 0);
2774 for_each_possible_cpu(cpu
)
2775 per_cpu(cpu_tsc_khz
, cpu
) = tsc_khz
;
2776 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC
)) {
2777 tsc_khz_ref
= tsc_khz
;
2778 cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block
,
2779 CPUFREQ_TRANSITION_NOTIFIER
);
2788 void kvm_arch_exit(void)
2790 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC
))
2791 cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block
,
2792 CPUFREQ_TRANSITION_NOTIFIER
);
2794 kvm_mmu_module_exit();
2797 int kvm_emulate_halt(struct kvm_vcpu
*vcpu
)
2799 ++vcpu
->stat
.halt_exits
;
2800 KVMTRACE_0D(HLT
, vcpu
, handler
);
2801 if (irqchip_in_kernel(vcpu
->kvm
)) {
2802 vcpu
->arch
.mp_state
= KVM_MP_STATE_HALTED
;
2805 vcpu
->run
->exit_reason
= KVM_EXIT_HLT
;
2809 EXPORT_SYMBOL_GPL(kvm_emulate_halt
);
2811 static inline gpa_t
hc_gpa(struct kvm_vcpu
*vcpu
, unsigned long a0
,
2814 if (is_long_mode(vcpu
))
2817 return a0
| ((gpa_t
)a1
<< 32);
2820 int kvm_emulate_hypercall(struct kvm_vcpu
*vcpu
)
2822 unsigned long nr
, a0
, a1
, a2
, a3
, ret
;
2825 nr
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
2826 a0
= kvm_register_read(vcpu
, VCPU_REGS_RBX
);
2827 a1
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
2828 a2
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
2829 a3
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
2831 KVMTRACE_1D(VMMCALL
, vcpu
, (u32
)nr
, handler
);
2833 if (!is_long_mode(vcpu
)) {
2842 case KVM_HC_VAPIC_POLL_IRQ
:
2846 r
= kvm_pv_mmu_op(vcpu
, a0
, hc_gpa(vcpu
, a1
, a2
), &ret
);
2852 kvm_register_write(vcpu
, VCPU_REGS_RAX
, ret
);
2853 ++vcpu
->stat
.hypercalls
;
2856 EXPORT_SYMBOL_GPL(kvm_emulate_hypercall
);
2858 int kvm_fix_hypercall(struct kvm_vcpu
*vcpu
)
2860 char instruction
[3];
2862 unsigned long rip
= kvm_rip_read(vcpu
);
2866 * Blow out the MMU to ensure that no other VCPU has an active mapping
2867 * to ensure that the updated hypercall appears atomically across all
2870 kvm_mmu_zap_all(vcpu
->kvm
);
2872 kvm_x86_ops
->patch_hypercall(vcpu
, instruction
);
2873 if (emulator_write_emulated(rip
, instruction
, 3, vcpu
)
2874 != X86EMUL_CONTINUE
)
2880 static u64
mk_cr_64(u64 curr_cr
, u32 new_val
)
2882 return (curr_cr
& ~((1ULL << 32) - 1)) | new_val
;
2885 void realmode_lgdt(struct kvm_vcpu
*vcpu
, u16 limit
, unsigned long base
)
2887 struct descriptor_table dt
= { limit
, base
};
2889 kvm_x86_ops
->set_gdt(vcpu
, &dt
);
2892 void realmode_lidt(struct kvm_vcpu
*vcpu
, u16 limit
, unsigned long base
)
2894 struct descriptor_table dt
= { limit
, base
};
2896 kvm_x86_ops
->set_idt(vcpu
, &dt
);
2899 void realmode_lmsw(struct kvm_vcpu
*vcpu
, unsigned long msw
,
2900 unsigned long *rflags
)
2902 kvm_lmsw(vcpu
, msw
);
2903 *rflags
= kvm_x86_ops
->get_rflags(vcpu
);
2906 unsigned long realmode_get_cr(struct kvm_vcpu
*vcpu
, int cr
)
2908 unsigned long value
;
2910 kvm_x86_ops
->decache_cr4_guest_bits(vcpu
);
2913 value
= vcpu
->arch
.cr0
;
2916 value
= vcpu
->arch
.cr2
;
2919 value
= vcpu
->arch
.cr3
;
2922 value
= vcpu
->arch
.cr4
;
2925 value
= kvm_get_cr8(vcpu
);
2928 vcpu_printf(vcpu
, "%s: unexpected cr %u\n", __func__
, cr
);
2931 KVMTRACE_3D(CR_READ
, vcpu
, (u32
)cr
, (u32
)value
,
2932 (u32
)((u64
)value
>> 32), handler
);
2937 void realmode_set_cr(struct kvm_vcpu
*vcpu
, int cr
, unsigned long val
,
2938 unsigned long *rflags
)
2940 KVMTRACE_3D(CR_WRITE
, vcpu
, (u32
)cr
, (u32
)val
,
2941 (u32
)((u64
)val
>> 32), handler
);
2945 kvm_set_cr0(vcpu
, mk_cr_64(vcpu
->arch
.cr0
, val
));
2946 *rflags
= kvm_x86_ops
->get_rflags(vcpu
);
2949 vcpu
->arch
.cr2
= val
;
2952 kvm_set_cr3(vcpu
, val
);
2955 kvm_set_cr4(vcpu
, mk_cr_64(vcpu
->arch
.cr4
, val
));
2958 kvm_set_cr8(vcpu
, val
& 0xfUL
);
2961 vcpu_printf(vcpu
, "%s: unexpected cr %u\n", __func__
, cr
);
2965 static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu
*vcpu
, int i
)
2967 struct kvm_cpuid_entry2
*e
= &vcpu
->arch
.cpuid_entries
[i
];
2968 int j
, nent
= vcpu
->arch
.cpuid_nent
;
2970 e
->flags
&= ~KVM_CPUID_FLAG_STATE_READ_NEXT
;
2971 /* when no next entry is found, the current entry[i] is reselected */
2972 for (j
= i
+ 1; ; j
= (j
+ 1) % nent
) {
2973 struct kvm_cpuid_entry2
*ej
= &vcpu
->arch
.cpuid_entries
[j
];
2974 if (ej
->function
== e
->function
) {
2975 ej
->flags
|= KVM_CPUID_FLAG_STATE_READ_NEXT
;
2979 return 0; /* silence gcc, even though control never reaches here */
2982 /* find an entry with matching function, matching index (if needed), and that
2983 * should be read next (if it's stateful) */
2984 static int is_matching_cpuid_entry(struct kvm_cpuid_entry2
*e
,
2985 u32 function
, u32 index
)
2987 if (e
->function
!= function
)
2989 if ((e
->flags
& KVM_CPUID_FLAG_SIGNIFCANT_INDEX
) && e
->index
!= index
)
2991 if ((e
->flags
& KVM_CPUID_FLAG_STATEFUL_FUNC
) &&
2992 !(e
->flags
& KVM_CPUID_FLAG_STATE_READ_NEXT
))
2997 struct kvm_cpuid_entry2
*kvm_find_cpuid_entry(struct kvm_vcpu
*vcpu
,
2998 u32 function
, u32 index
)
3001 struct kvm_cpuid_entry2
*best
= NULL
;
3003 for (i
= 0; i
< vcpu
->arch
.cpuid_nent
; ++i
) {
3004 struct kvm_cpuid_entry2
*e
;
3006 e
= &vcpu
->arch
.cpuid_entries
[i
];
3007 if (is_matching_cpuid_entry(e
, function
, index
)) {
3008 if (e
->flags
& KVM_CPUID_FLAG_STATEFUL_FUNC
)
3009 move_to_next_stateful_cpuid_entry(vcpu
, i
);
3014 * Both basic or both extended?
3016 if (((e
->function
^ function
) & 0x80000000) == 0)
3017 if (!best
|| e
->function
> best
->function
)
3023 int cpuid_maxphyaddr(struct kvm_vcpu
*vcpu
)
3025 struct kvm_cpuid_entry2
*best
;
3027 best
= kvm_find_cpuid_entry(vcpu
, 0x80000008, 0);
3029 return best
->eax
& 0xff;
3033 void kvm_emulate_cpuid(struct kvm_vcpu
*vcpu
)
3035 u32 function
, index
;
3036 struct kvm_cpuid_entry2
*best
;
3038 function
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
3039 index
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
3040 kvm_register_write(vcpu
, VCPU_REGS_RAX
, 0);
3041 kvm_register_write(vcpu
, VCPU_REGS_RBX
, 0);
3042 kvm_register_write(vcpu
, VCPU_REGS_RCX
, 0);
3043 kvm_register_write(vcpu
, VCPU_REGS_RDX
, 0);
3044 best
= kvm_find_cpuid_entry(vcpu
, function
, index
);
3046 kvm_register_write(vcpu
, VCPU_REGS_RAX
, best
->eax
);
3047 kvm_register_write(vcpu
, VCPU_REGS_RBX
, best
->ebx
);
3048 kvm_register_write(vcpu
, VCPU_REGS_RCX
, best
->ecx
);
3049 kvm_register_write(vcpu
, VCPU_REGS_RDX
, best
->edx
);
3051 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
3052 KVMTRACE_5D(CPUID
, vcpu
, function
,
3053 (u32
)kvm_register_read(vcpu
, VCPU_REGS_RAX
),
3054 (u32
)kvm_register_read(vcpu
, VCPU_REGS_RBX
),
3055 (u32
)kvm_register_read(vcpu
, VCPU_REGS_RCX
),
3056 (u32
)kvm_register_read(vcpu
, VCPU_REGS_RDX
), handler
);
3058 EXPORT_SYMBOL_GPL(kvm_emulate_cpuid
);
3061 * Check if userspace requested an interrupt window, and that the
3062 * interrupt window is open.
3064 * No need to exit to userspace if we already have an interrupt queued.
3066 static int dm_request_for_irq_injection(struct kvm_vcpu
*vcpu
,
3067 struct kvm_run
*kvm_run
)
3069 return (!vcpu
->arch
.irq_summary
&&
3070 kvm_run
->request_interrupt_window
&&
3071 vcpu
->arch
.interrupt_window_open
&&
3072 (kvm_x86_ops
->get_rflags(vcpu
) & X86_EFLAGS_IF
));
3075 static void post_kvm_run_save(struct kvm_vcpu
*vcpu
,
3076 struct kvm_run
*kvm_run
)
3078 kvm_run
->if_flag
= (kvm_x86_ops
->get_rflags(vcpu
) & X86_EFLAGS_IF
) != 0;
3079 kvm_run
->cr8
= kvm_get_cr8(vcpu
);
3080 kvm_run
->apic_base
= kvm_get_apic_base(vcpu
);
3081 if (irqchip_in_kernel(vcpu
->kvm
))
3082 kvm_run
->ready_for_interrupt_injection
= 1;
3084 kvm_run
->ready_for_interrupt_injection
=
3085 (vcpu
->arch
.interrupt_window_open
&&
3086 vcpu
->arch
.irq_summary
== 0);
3089 static void vapic_enter(struct kvm_vcpu
*vcpu
)
3091 struct kvm_lapic
*apic
= vcpu
->arch
.apic
;
3094 if (!apic
|| !apic
->vapic_addr
)
3097 page
= gfn_to_page(vcpu
->kvm
, apic
->vapic_addr
>> PAGE_SHIFT
);
3099 vcpu
->arch
.apic
->vapic_page
= page
;
3102 static void vapic_exit(struct kvm_vcpu
*vcpu
)
3104 struct kvm_lapic
*apic
= vcpu
->arch
.apic
;
3106 if (!apic
|| !apic
->vapic_addr
)
3109 down_read(&vcpu
->kvm
->slots_lock
);
3110 kvm_release_page_dirty(apic
->vapic_page
);
3111 mark_page_dirty(vcpu
->kvm
, apic
->vapic_addr
>> PAGE_SHIFT
);
3112 up_read(&vcpu
->kvm
->slots_lock
);
3115 static int vcpu_enter_guest(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
3120 if (test_and_clear_bit(KVM_REQ_MMU_RELOAD
, &vcpu
->requests
))
3121 kvm_mmu_unload(vcpu
);
3123 r
= kvm_mmu_reload(vcpu
);
3127 if (vcpu
->requests
) {
3128 if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER
, &vcpu
->requests
))
3129 __kvm_migrate_timers(vcpu
);
3130 if (test_and_clear_bit(KVM_REQ_KVMCLOCK_UPDATE
, &vcpu
->requests
))
3131 kvm_write_guest_time(vcpu
);
3132 if (test_and_clear_bit(KVM_REQ_MMU_SYNC
, &vcpu
->requests
))
3133 kvm_mmu_sync_roots(vcpu
);
3134 if (test_and_clear_bit(KVM_REQ_TLB_FLUSH
, &vcpu
->requests
))
3135 kvm_x86_ops
->tlb_flush(vcpu
);
3136 if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS
,
3138 kvm_run
->exit_reason
= KVM_EXIT_TPR_ACCESS
;
3142 if (test_and_clear_bit(KVM_REQ_TRIPLE_FAULT
, &vcpu
->requests
)) {
3143 kvm_run
->exit_reason
= KVM_EXIT_SHUTDOWN
;
3151 kvm_x86_ops
->prepare_guest_switch(vcpu
);
3152 kvm_load_guest_fpu(vcpu
);
3154 local_irq_disable();
3156 if (vcpu
->requests
|| need_resched() || signal_pending(current
)) {
3163 vcpu
->guest_mode
= 1;
3165 * Make sure that guest_mode assignment won't happen after
3166 * testing the pending IRQ vector bitmap.
3170 if (vcpu
->arch
.exception
.pending
)
3171 __queue_exception(vcpu
);
3172 else if (irqchip_in_kernel(vcpu
->kvm
))
3173 kvm_x86_ops
->inject_pending_irq(vcpu
);
3175 kvm_x86_ops
->inject_pending_vectors(vcpu
, kvm_run
);
3177 kvm_lapic_sync_to_vapic(vcpu
);
3179 up_read(&vcpu
->kvm
->slots_lock
);
3183 get_debugreg(vcpu
->arch
.host_dr6
, 6);
3184 get_debugreg(vcpu
->arch
.host_dr7
, 7);
3185 if (unlikely(vcpu
->arch
.switch_db_regs
)) {
3186 get_debugreg(vcpu
->arch
.host_db
[0], 0);
3187 get_debugreg(vcpu
->arch
.host_db
[1], 1);
3188 get_debugreg(vcpu
->arch
.host_db
[2], 2);
3189 get_debugreg(vcpu
->arch
.host_db
[3], 3);
3192 set_debugreg(vcpu
->arch
.eff_db
[0], 0);
3193 set_debugreg(vcpu
->arch
.eff_db
[1], 1);
3194 set_debugreg(vcpu
->arch
.eff_db
[2], 2);
3195 set_debugreg(vcpu
->arch
.eff_db
[3], 3);
3198 KVMTRACE_0D(VMENTRY
, vcpu
, entryexit
);
3199 kvm_x86_ops
->run(vcpu
, kvm_run
);
3201 if (unlikely(vcpu
->arch
.switch_db_regs
)) {
3203 set_debugreg(vcpu
->arch
.host_db
[0], 0);
3204 set_debugreg(vcpu
->arch
.host_db
[1], 1);
3205 set_debugreg(vcpu
->arch
.host_db
[2], 2);
3206 set_debugreg(vcpu
->arch
.host_db
[3], 3);
3208 set_debugreg(vcpu
->arch
.host_dr6
, 6);
3209 set_debugreg(vcpu
->arch
.host_dr7
, 7);
3211 vcpu
->guest_mode
= 0;
3217 * We must have an instruction between local_irq_enable() and
3218 * kvm_guest_exit(), so the timer interrupt isn't delayed by
3219 * the interrupt shadow. The stat.exits increment will do nicely.
3220 * But we need to prevent reordering, hence this barrier():
3228 down_read(&vcpu
->kvm
->slots_lock
);
3231 * Profile KVM exit RIPs:
3233 if (unlikely(prof_on
== KVM_PROFILING
)) {
3234 unsigned long rip
= kvm_rip_read(vcpu
);
3235 profile_hit(KVM_PROFILING
, (void *)rip
);
3238 if (vcpu
->arch
.exception
.pending
&& kvm_x86_ops
->exception_injected(vcpu
))
3239 vcpu
->arch
.exception
.pending
= false;
3241 kvm_lapic_sync_from_vapic(vcpu
);
3243 r
= kvm_x86_ops
->handle_exit(kvm_run
, vcpu
);
3249 static int __vcpu_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
3253 if (unlikely(vcpu
->arch
.mp_state
== KVM_MP_STATE_SIPI_RECEIVED
)) {
3254 pr_debug("vcpu %d received sipi with vector # %x\n",
3255 vcpu
->vcpu_id
, vcpu
->arch
.sipi_vector
);
3256 kvm_lapic_reset(vcpu
);
3257 r
= kvm_arch_vcpu_reset(vcpu
);
3260 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
3263 down_read(&vcpu
->kvm
->slots_lock
);
3268 if (vcpu
->arch
.mp_state
== KVM_MP_STATE_RUNNABLE
)
3269 r
= vcpu_enter_guest(vcpu
, kvm_run
);
3271 up_read(&vcpu
->kvm
->slots_lock
);
3272 kvm_vcpu_block(vcpu
);
3273 down_read(&vcpu
->kvm
->slots_lock
);
3274 if (test_and_clear_bit(KVM_REQ_UNHALT
, &vcpu
->requests
))
3276 switch(vcpu
->arch
.mp_state
) {
3277 case KVM_MP_STATE_HALTED
:
3278 vcpu
->arch
.mp_state
=
3279 KVM_MP_STATE_RUNNABLE
;
3280 case KVM_MP_STATE_RUNNABLE
:
3282 case KVM_MP_STATE_SIPI_RECEIVED
:
3293 clear_bit(KVM_REQ_PENDING_TIMER
, &vcpu
->requests
);
3294 if (kvm_cpu_has_pending_timer(vcpu
))
3295 kvm_inject_pending_timer_irqs(vcpu
);
3297 if (dm_request_for_irq_injection(vcpu
, kvm_run
)) {
3299 kvm_run
->exit_reason
= KVM_EXIT_INTR
;
3300 ++vcpu
->stat
.request_irq_exits
;
3302 if (signal_pending(current
)) {
3304 kvm_run
->exit_reason
= KVM_EXIT_INTR
;
3305 ++vcpu
->stat
.signal_exits
;
3307 if (need_resched()) {
3308 up_read(&vcpu
->kvm
->slots_lock
);
3310 down_read(&vcpu
->kvm
->slots_lock
);
3314 up_read(&vcpu
->kvm
->slots_lock
);
3315 post_kvm_run_save(vcpu
, kvm_run
);
3322 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
3329 if (vcpu
->sigset_active
)
3330 sigprocmask(SIG_SETMASK
, &vcpu
->sigset
, &sigsaved
);
3332 if (unlikely(vcpu
->arch
.mp_state
== KVM_MP_STATE_UNINITIALIZED
)) {
3333 kvm_vcpu_block(vcpu
);
3334 clear_bit(KVM_REQ_UNHALT
, &vcpu
->requests
);
3339 /* re-sync apic's tpr */
3340 if (!irqchip_in_kernel(vcpu
->kvm
))
3341 kvm_set_cr8(vcpu
, kvm_run
->cr8
);
3343 if (vcpu
->arch
.pio
.cur_count
) {
3344 r
= complete_pio(vcpu
);
3348 #if CONFIG_HAS_IOMEM
3349 if (vcpu
->mmio_needed
) {
3350 memcpy(vcpu
->mmio_data
, kvm_run
->mmio
.data
, 8);
3351 vcpu
->mmio_read_completed
= 1;
3352 vcpu
->mmio_needed
= 0;
3354 down_read(&vcpu
->kvm
->slots_lock
);
3355 r
= emulate_instruction(vcpu
, kvm_run
,
3356 vcpu
->arch
.mmio_fault_cr2
, 0,
3357 EMULTYPE_NO_DECODE
);
3358 up_read(&vcpu
->kvm
->slots_lock
);
3359 if (r
== EMULATE_DO_MMIO
) {
3361 * Read-modify-write. Back to userspace.
3368 if (kvm_run
->exit_reason
== KVM_EXIT_HYPERCALL
)
3369 kvm_register_write(vcpu
, VCPU_REGS_RAX
,
3370 kvm_run
->hypercall
.ret
);
3372 r
= __vcpu_run(vcpu
, kvm_run
);
3375 if (vcpu
->sigset_active
)
3376 sigprocmask(SIG_SETMASK
, &sigsaved
, NULL
);
3382 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
)
3386 regs
->rax
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
3387 regs
->rbx
= kvm_register_read(vcpu
, VCPU_REGS_RBX
);
3388 regs
->rcx
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
3389 regs
->rdx
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
3390 regs
->rsi
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
3391 regs
->rdi
= kvm_register_read(vcpu
, VCPU_REGS_RDI
);
3392 regs
->rsp
= kvm_register_read(vcpu
, VCPU_REGS_RSP
);
3393 regs
->rbp
= kvm_register_read(vcpu
, VCPU_REGS_RBP
);
3394 #ifdef CONFIG_X86_64
3395 regs
->r8
= kvm_register_read(vcpu
, VCPU_REGS_R8
);
3396 regs
->r9
= kvm_register_read(vcpu
, VCPU_REGS_R9
);
3397 regs
->r10
= kvm_register_read(vcpu
, VCPU_REGS_R10
);
3398 regs
->r11
= kvm_register_read(vcpu
, VCPU_REGS_R11
);
3399 regs
->r12
= kvm_register_read(vcpu
, VCPU_REGS_R12
);
3400 regs
->r13
= kvm_register_read(vcpu
, VCPU_REGS_R13
);
3401 regs
->r14
= kvm_register_read(vcpu
, VCPU_REGS_R14
);
3402 regs
->r15
= kvm_register_read(vcpu
, VCPU_REGS_R15
);
3405 regs
->rip
= kvm_rip_read(vcpu
);
3406 regs
->rflags
= kvm_x86_ops
->get_rflags(vcpu
);
3409 * Don't leak debug flags in case they were set for guest debugging
3411 if (vcpu
->guest_debug
& KVM_GUESTDBG_SINGLESTEP
)
3412 regs
->rflags
&= ~(X86_EFLAGS_TF
| X86_EFLAGS_RF
);
3419 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
)
3423 kvm_register_write(vcpu
, VCPU_REGS_RAX
, regs
->rax
);
3424 kvm_register_write(vcpu
, VCPU_REGS_RBX
, regs
->rbx
);
3425 kvm_register_write(vcpu
, VCPU_REGS_RCX
, regs
->rcx
);
3426 kvm_register_write(vcpu
, VCPU_REGS_RDX
, regs
->rdx
);
3427 kvm_register_write(vcpu
, VCPU_REGS_RSI
, regs
->rsi
);
3428 kvm_register_write(vcpu
, VCPU_REGS_RDI
, regs
->rdi
);
3429 kvm_register_write(vcpu
, VCPU_REGS_RSP
, regs
->rsp
);
3430 kvm_register_write(vcpu
, VCPU_REGS_RBP
, regs
->rbp
);
3431 #ifdef CONFIG_X86_64
3432 kvm_register_write(vcpu
, VCPU_REGS_R8
, regs
->r8
);
3433 kvm_register_write(vcpu
, VCPU_REGS_R9
, regs
->r9
);
3434 kvm_register_write(vcpu
, VCPU_REGS_R10
, regs
->r10
);
3435 kvm_register_write(vcpu
, VCPU_REGS_R11
, regs
->r11
);
3436 kvm_register_write(vcpu
, VCPU_REGS_R12
, regs
->r12
);
3437 kvm_register_write(vcpu
, VCPU_REGS_R13
, regs
->r13
);
3438 kvm_register_write(vcpu
, VCPU_REGS_R14
, regs
->r14
);
3439 kvm_register_write(vcpu
, VCPU_REGS_R15
, regs
->r15
);
3443 kvm_rip_write(vcpu
, regs
->rip
);
3444 kvm_x86_ops
->set_rflags(vcpu
, regs
->rflags
);
3447 vcpu
->arch
.exception
.pending
= false;
3454 void kvm_get_segment(struct kvm_vcpu
*vcpu
,
3455 struct kvm_segment
*var
, int seg
)
3457 kvm_x86_ops
->get_segment(vcpu
, var
, seg
);
3460 void kvm_get_cs_db_l_bits(struct kvm_vcpu
*vcpu
, int *db
, int *l
)
3462 struct kvm_segment cs
;
3464 kvm_get_segment(vcpu
, &cs
, VCPU_SREG_CS
);
3468 EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits
);
3470 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
3471 struct kvm_sregs
*sregs
)
3473 struct descriptor_table dt
;
3478 kvm_get_segment(vcpu
, &sregs
->cs
, VCPU_SREG_CS
);
3479 kvm_get_segment(vcpu
, &sregs
->ds
, VCPU_SREG_DS
);
3480 kvm_get_segment(vcpu
, &sregs
->es
, VCPU_SREG_ES
);
3481 kvm_get_segment(vcpu
, &sregs
->fs
, VCPU_SREG_FS
);
3482 kvm_get_segment(vcpu
, &sregs
->gs
, VCPU_SREG_GS
);
3483 kvm_get_segment(vcpu
, &sregs
->ss
, VCPU_SREG_SS
);
3485 kvm_get_segment(vcpu
, &sregs
->tr
, VCPU_SREG_TR
);
3486 kvm_get_segment(vcpu
, &sregs
->ldt
, VCPU_SREG_LDTR
);
3488 kvm_x86_ops
->get_idt(vcpu
, &dt
);
3489 sregs
->idt
.limit
= dt
.limit
;
3490 sregs
->idt
.base
= dt
.base
;
3491 kvm_x86_ops
->get_gdt(vcpu
, &dt
);
3492 sregs
->gdt
.limit
= dt
.limit
;
3493 sregs
->gdt
.base
= dt
.base
;
3495 kvm_x86_ops
->decache_cr4_guest_bits(vcpu
);
3496 sregs
->cr0
= vcpu
->arch
.cr0
;
3497 sregs
->cr2
= vcpu
->arch
.cr2
;
3498 sregs
->cr3
= vcpu
->arch
.cr3
;
3499 sregs
->cr4
= vcpu
->arch
.cr4
;
3500 sregs
->cr8
= kvm_get_cr8(vcpu
);
3501 sregs
->efer
= vcpu
->arch
.shadow_efer
;
3502 sregs
->apic_base
= kvm_get_apic_base(vcpu
);
3504 if (irqchip_in_kernel(vcpu
->kvm
)) {
3505 memset(sregs
->interrupt_bitmap
, 0,
3506 sizeof sregs
->interrupt_bitmap
);
3507 pending_vec
= kvm_x86_ops
->get_irq(vcpu
);
3508 if (pending_vec
>= 0)
3509 set_bit(pending_vec
,
3510 (unsigned long *)sregs
->interrupt_bitmap
);
3512 memcpy(sregs
->interrupt_bitmap
, vcpu
->arch
.irq_pending
,
3513 sizeof sregs
->interrupt_bitmap
);
3520 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
3521 struct kvm_mp_state
*mp_state
)
3524 mp_state
->mp_state
= vcpu
->arch
.mp_state
;
3529 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
3530 struct kvm_mp_state
*mp_state
)
3533 vcpu
->arch
.mp_state
= mp_state
->mp_state
;
3538 static void kvm_set_segment(struct kvm_vcpu
*vcpu
,
3539 struct kvm_segment
*var
, int seg
)
3541 kvm_x86_ops
->set_segment(vcpu
, var
, seg
);
3544 static void seg_desct_to_kvm_desct(struct desc_struct
*seg_desc
, u16 selector
,
3545 struct kvm_segment
*kvm_desct
)
3547 kvm_desct
->base
= seg_desc
->base0
;
3548 kvm_desct
->base
|= seg_desc
->base1
<< 16;
3549 kvm_desct
->base
|= seg_desc
->base2
<< 24;
3550 kvm_desct
->limit
= seg_desc
->limit0
;
3551 kvm_desct
->limit
|= seg_desc
->limit
<< 16;
3553 kvm_desct
->limit
<<= 12;
3554 kvm_desct
->limit
|= 0xfff;
3556 kvm_desct
->selector
= selector
;
3557 kvm_desct
->type
= seg_desc
->type
;
3558 kvm_desct
->present
= seg_desc
->p
;
3559 kvm_desct
->dpl
= seg_desc
->dpl
;
3560 kvm_desct
->db
= seg_desc
->d
;
3561 kvm_desct
->s
= seg_desc
->s
;
3562 kvm_desct
->l
= seg_desc
->l
;
3563 kvm_desct
->g
= seg_desc
->g
;
3564 kvm_desct
->avl
= seg_desc
->avl
;
3566 kvm_desct
->unusable
= 1;
3568 kvm_desct
->unusable
= 0;
3569 kvm_desct
->padding
= 0;
3572 static void get_segment_descriptor_dtable(struct kvm_vcpu
*vcpu
,
3574 struct descriptor_table
*dtable
)
3576 if (selector
& 1 << 2) {
3577 struct kvm_segment kvm_seg
;
3579 kvm_get_segment(vcpu
, &kvm_seg
, VCPU_SREG_LDTR
);
3581 if (kvm_seg
.unusable
)
3584 dtable
->limit
= kvm_seg
.limit
;
3585 dtable
->base
= kvm_seg
.base
;
3588 kvm_x86_ops
->get_gdt(vcpu
, dtable
);
3591 /* allowed just for 8 bytes segments */
3592 static int load_guest_segment_descriptor(struct kvm_vcpu
*vcpu
, u16 selector
,
3593 struct desc_struct
*seg_desc
)
3596 struct descriptor_table dtable
;
3597 u16 index
= selector
>> 3;
3599 get_segment_descriptor_dtable(vcpu
, selector
, &dtable
);
3601 if (dtable
.limit
< index
* 8 + 7) {
3602 kvm_queue_exception_e(vcpu
, GP_VECTOR
, selector
& 0xfffc);
3605 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, dtable
.base
);
3607 return kvm_read_guest(vcpu
->kvm
, gpa
, seg_desc
, 8);
3610 /* allowed just for 8 bytes segments */
3611 static int save_guest_segment_descriptor(struct kvm_vcpu
*vcpu
, u16 selector
,
3612 struct desc_struct
*seg_desc
)
3615 struct descriptor_table dtable
;
3616 u16 index
= selector
>> 3;
3618 get_segment_descriptor_dtable(vcpu
, selector
, &dtable
);
3620 if (dtable
.limit
< index
* 8 + 7)
3622 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, dtable
.base
);
3624 return kvm_write_guest(vcpu
->kvm
, gpa
, seg_desc
, 8);
3627 static u32
get_tss_base_addr(struct kvm_vcpu
*vcpu
,
3628 struct desc_struct
*seg_desc
)
3632 base_addr
= seg_desc
->base0
;
3633 base_addr
|= (seg_desc
->base1
<< 16);
3634 base_addr
|= (seg_desc
->base2
<< 24);
3636 return vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, base_addr
);
3639 static u16
get_segment_selector(struct kvm_vcpu
*vcpu
, int seg
)
3641 struct kvm_segment kvm_seg
;
3643 kvm_get_segment(vcpu
, &kvm_seg
, seg
);
3644 return kvm_seg
.selector
;
3647 static int load_segment_descriptor_to_kvm_desct(struct kvm_vcpu
*vcpu
,
3649 struct kvm_segment
*kvm_seg
)
3651 struct desc_struct seg_desc
;
3653 if (load_guest_segment_descriptor(vcpu
, selector
, &seg_desc
))
3655 seg_desct_to_kvm_desct(&seg_desc
, selector
, kvm_seg
);
3659 static int kvm_load_realmode_segment(struct kvm_vcpu
*vcpu
, u16 selector
, int seg
)
3661 struct kvm_segment segvar
= {
3662 .base
= selector
<< 4,
3664 .selector
= selector
,
3675 kvm_x86_ops
->set_segment(vcpu
, &segvar
, seg
);
3679 int kvm_load_segment_descriptor(struct kvm_vcpu
*vcpu
, u16 selector
,
3680 int type_bits
, int seg
)
3682 struct kvm_segment kvm_seg
;
3684 if (!(vcpu
->arch
.cr0
& X86_CR0_PE
))
3685 return kvm_load_realmode_segment(vcpu
, selector
, seg
);
3686 if (load_segment_descriptor_to_kvm_desct(vcpu
, selector
, &kvm_seg
))
3688 kvm_seg
.type
|= type_bits
;
3690 if (seg
!= VCPU_SREG_SS
&& seg
!= VCPU_SREG_CS
&&
3691 seg
!= VCPU_SREG_LDTR
)
3693 kvm_seg
.unusable
= 1;
3695 kvm_set_segment(vcpu
, &kvm_seg
, seg
);
3699 static void save_state_to_tss32(struct kvm_vcpu
*vcpu
,
3700 struct tss_segment_32
*tss
)
3702 tss
->cr3
= vcpu
->arch
.cr3
;
3703 tss
->eip
= kvm_rip_read(vcpu
);
3704 tss
->eflags
= kvm_x86_ops
->get_rflags(vcpu
);
3705 tss
->eax
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
3706 tss
->ecx
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
3707 tss
->edx
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
3708 tss
->ebx
= kvm_register_read(vcpu
, VCPU_REGS_RBX
);
3709 tss
->esp
= kvm_register_read(vcpu
, VCPU_REGS_RSP
);
3710 tss
->ebp
= kvm_register_read(vcpu
, VCPU_REGS_RBP
);
3711 tss
->esi
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
3712 tss
->edi
= kvm_register_read(vcpu
, VCPU_REGS_RDI
);
3713 tss
->es
= get_segment_selector(vcpu
, VCPU_SREG_ES
);
3714 tss
->cs
= get_segment_selector(vcpu
, VCPU_SREG_CS
);
3715 tss
->ss
= get_segment_selector(vcpu
, VCPU_SREG_SS
);
3716 tss
->ds
= get_segment_selector(vcpu
, VCPU_SREG_DS
);
3717 tss
->fs
= get_segment_selector(vcpu
, VCPU_SREG_FS
);
3718 tss
->gs
= get_segment_selector(vcpu
, VCPU_SREG_GS
);
3719 tss
->ldt_selector
= get_segment_selector(vcpu
, VCPU_SREG_LDTR
);
3720 tss
->prev_task_link
= get_segment_selector(vcpu
, VCPU_SREG_TR
);
3723 static int load_state_from_tss32(struct kvm_vcpu
*vcpu
,
3724 struct tss_segment_32
*tss
)
3726 kvm_set_cr3(vcpu
, tss
->cr3
);
3728 kvm_rip_write(vcpu
, tss
->eip
);
3729 kvm_x86_ops
->set_rflags(vcpu
, tss
->eflags
| 2);
3731 kvm_register_write(vcpu
, VCPU_REGS_RAX
, tss
->eax
);
3732 kvm_register_write(vcpu
, VCPU_REGS_RCX
, tss
->ecx
);
3733 kvm_register_write(vcpu
, VCPU_REGS_RDX
, tss
->edx
);
3734 kvm_register_write(vcpu
, VCPU_REGS_RBX
, tss
->ebx
);
3735 kvm_register_write(vcpu
, VCPU_REGS_RSP
, tss
->esp
);
3736 kvm_register_write(vcpu
, VCPU_REGS_RBP
, tss
->ebp
);
3737 kvm_register_write(vcpu
, VCPU_REGS_RSI
, tss
->esi
);
3738 kvm_register_write(vcpu
, VCPU_REGS_RDI
, tss
->edi
);
3740 if (kvm_load_segment_descriptor(vcpu
, tss
->ldt_selector
, 0, VCPU_SREG_LDTR
))
3743 if (kvm_load_segment_descriptor(vcpu
, tss
->es
, 1, VCPU_SREG_ES
))
3746 if (kvm_load_segment_descriptor(vcpu
, tss
->cs
, 9, VCPU_SREG_CS
))
3749 if (kvm_load_segment_descriptor(vcpu
, tss
->ss
, 1, VCPU_SREG_SS
))
3752 if (kvm_load_segment_descriptor(vcpu
, tss
->ds
, 1, VCPU_SREG_DS
))
3755 if (kvm_load_segment_descriptor(vcpu
, tss
->fs
, 1, VCPU_SREG_FS
))
3758 if (kvm_load_segment_descriptor(vcpu
, tss
->gs
, 1, VCPU_SREG_GS
))
3763 static void save_state_to_tss16(struct kvm_vcpu
*vcpu
,
3764 struct tss_segment_16
*tss
)
3766 tss
->ip
= kvm_rip_read(vcpu
);
3767 tss
->flag
= kvm_x86_ops
->get_rflags(vcpu
);
3768 tss
->ax
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
3769 tss
->cx
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
3770 tss
->dx
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
3771 tss
->bx
= kvm_register_read(vcpu
, VCPU_REGS_RBX
);
3772 tss
->sp
= kvm_register_read(vcpu
, VCPU_REGS_RSP
);
3773 tss
->bp
= kvm_register_read(vcpu
, VCPU_REGS_RBP
);
3774 tss
->si
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
3775 tss
->di
= kvm_register_read(vcpu
, VCPU_REGS_RDI
);
3777 tss
->es
= get_segment_selector(vcpu
, VCPU_SREG_ES
);
3778 tss
->cs
= get_segment_selector(vcpu
, VCPU_SREG_CS
);
3779 tss
->ss
= get_segment_selector(vcpu
, VCPU_SREG_SS
);
3780 tss
->ds
= get_segment_selector(vcpu
, VCPU_SREG_DS
);
3781 tss
->ldt
= get_segment_selector(vcpu
, VCPU_SREG_LDTR
);
3782 tss
->prev_task_link
= get_segment_selector(vcpu
, VCPU_SREG_TR
);
3785 static int load_state_from_tss16(struct kvm_vcpu
*vcpu
,
3786 struct tss_segment_16
*tss
)
3788 kvm_rip_write(vcpu
, tss
->ip
);
3789 kvm_x86_ops
->set_rflags(vcpu
, tss
->flag
| 2);
3790 kvm_register_write(vcpu
, VCPU_REGS_RAX
, tss
->ax
);
3791 kvm_register_write(vcpu
, VCPU_REGS_RCX
, tss
->cx
);
3792 kvm_register_write(vcpu
, VCPU_REGS_RDX
, tss
->dx
);
3793 kvm_register_write(vcpu
, VCPU_REGS_RBX
, tss
->bx
);
3794 kvm_register_write(vcpu
, VCPU_REGS_RSP
, tss
->sp
);
3795 kvm_register_write(vcpu
, VCPU_REGS_RBP
, tss
->bp
);
3796 kvm_register_write(vcpu
, VCPU_REGS_RSI
, tss
->si
);
3797 kvm_register_write(vcpu
, VCPU_REGS_RDI
, tss
->di
);
3799 if (kvm_load_segment_descriptor(vcpu
, tss
->ldt
, 0, VCPU_SREG_LDTR
))
3802 if (kvm_load_segment_descriptor(vcpu
, tss
->es
, 1, VCPU_SREG_ES
))
3805 if (kvm_load_segment_descriptor(vcpu
, tss
->cs
, 9, VCPU_SREG_CS
))
3808 if (kvm_load_segment_descriptor(vcpu
, tss
->ss
, 1, VCPU_SREG_SS
))
3811 if (kvm_load_segment_descriptor(vcpu
, tss
->ds
, 1, VCPU_SREG_DS
))
3816 static int kvm_task_switch_16(struct kvm_vcpu
*vcpu
, u16 tss_selector
,
3818 struct desc_struct
*nseg_desc
)
3820 struct tss_segment_16 tss_segment_16
;
3823 if (kvm_read_guest(vcpu
->kvm
, old_tss_base
, &tss_segment_16
,
3824 sizeof tss_segment_16
))
3827 save_state_to_tss16(vcpu
, &tss_segment_16
);
3829 if (kvm_write_guest(vcpu
->kvm
, old_tss_base
, &tss_segment_16
,
3830 sizeof tss_segment_16
))
3833 if (kvm_read_guest(vcpu
->kvm
, get_tss_base_addr(vcpu
, nseg_desc
),
3834 &tss_segment_16
, sizeof tss_segment_16
))
3837 if (load_state_from_tss16(vcpu
, &tss_segment_16
))
3845 static int kvm_task_switch_32(struct kvm_vcpu
*vcpu
, u16 tss_selector
,
3847 struct desc_struct
*nseg_desc
)
3849 struct tss_segment_32 tss_segment_32
;
3852 if (kvm_read_guest(vcpu
->kvm
, old_tss_base
, &tss_segment_32
,
3853 sizeof tss_segment_32
))
3856 save_state_to_tss32(vcpu
, &tss_segment_32
);
3858 if (kvm_write_guest(vcpu
->kvm
, old_tss_base
, &tss_segment_32
,
3859 sizeof tss_segment_32
))
3862 if (kvm_read_guest(vcpu
->kvm
, get_tss_base_addr(vcpu
, nseg_desc
),
3863 &tss_segment_32
, sizeof tss_segment_32
))
3866 if (load_state_from_tss32(vcpu
, &tss_segment_32
))
3874 int kvm_task_switch(struct kvm_vcpu
*vcpu
, u16 tss_selector
, int reason
)
3876 struct kvm_segment tr_seg
;
3877 struct desc_struct cseg_desc
;
3878 struct desc_struct nseg_desc
;
3880 u32 old_tss_base
= get_segment_base(vcpu
, VCPU_SREG_TR
);
3881 u16 old_tss_sel
= get_segment_selector(vcpu
, VCPU_SREG_TR
);
3883 old_tss_base
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, old_tss_base
);
3885 /* FIXME: Handle errors. Failure to read either TSS or their
3886 * descriptors should generate a pagefault.
3888 if (load_guest_segment_descriptor(vcpu
, tss_selector
, &nseg_desc
))
3891 if (load_guest_segment_descriptor(vcpu
, old_tss_sel
, &cseg_desc
))
3894 if (reason
!= TASK_SWITCH_IRET
) {
3897 cpl
= kvm_x86_ops
->get_cpl(vcpu
);
3898 if ((tss_selector
& 3) > nseg_desc
.dpl
|| cpl
> nseg_desc
.dpl
) {
3899 kvm_queue_exception_e(vcpu
, GP_VECTOR
, 0);
3904 if (!nseg_desc
.p
|| (nseg_desc
.limit0
| nseg_desc
.limit
<< 16) < 0x67) {
3905 kvm_queue_exception_e(vcpu
, TS_VECTOR
, tss_selector
& 0xfffc);
3909 if (reason
== TASK_SWITCH_IRET
|| reason
== TASK_SWITCH_JMP
) {
3910 cseg_desc
.type
&= ~(1 << 1); //clear the B flag
3911 save_guest_segment_descriptor(vcpu
, old_tss_sel
, &cseg_desc
);
3914 if (reason
== TASK_SWITCH_IRET
) {
3915 u32 eflags
= kvm_x86_ops
->get_rflags(vcpu
);
3916 kvm_x86_ops
->set_rflags(vcpu
, eflags
& ~X86_EFLAGS_NT
);
3919 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
3921 if (nseg_desc
.type
& 8)
3922 ret
= kvm_task_switch_32(vcpu
, tss_selector
, old_tss_base
,
3925 ret
= kvm_task_switch_16(vcpu
, tss_selector
, old_tss_base
,
3928 if (reason
== TASK_SWITCH_CALL
|| reason
== TASK_SWITCH_GATE
) {
3929 u32 eflags
= kvm_x86_ops
->get_rflags(vcpu
);
3930 kvm_x86_ops
->set_rflags(vcpu
, eflags
| X86_EFLAGS_NT
);
3933 if (reason
!= TASK_SWITCH_IRET
) {
3934 nseg_desc
.type
|= (1 << 1);
3935 save_guest_segment_descriptor(vcpu
, tss_selector
,
3939 kvm_x86_ops
->set_cr0(vcpu
, vcpu
->arch
.cr0
| X86_CR0_TS
);
3940 seg_desct_to_kvm_desct(&nseg_desc
, tss_selector
, &tr_seg
);
3942 kvm_set_segment(vcpu
, &tr_seg
, VCPU_SREG_TR
);
3946 EXPORT_SYMBOL_GPL(kvm_task_switch
);
3948 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
3949 struct kvm_sregs
*sregs
)
3951 int mmu_reset_needed
= 0;
3952 int i
, pending_vec
, max_bits
;
3953 struct descriptor_table dt
;
3957 dt
.limit
= sregs
->idt
.limit
;
3958 dt
.base
= sregs
->idt
.base
;
3959 kvm_x86_ops
->set_idt(vcpu
, &dt
);
3960 dt
.limit
= sregs
->gdt
.limit
;
3961 dt
.base
= sregs
->gdt
.base
;
3962 kvm_x86_ops
->set_gdt(vcpu
, &dt
);
3964 vcpu
->arch
.cr2
= sregs
->cr2
;
3965 mmu_reset_needed
|= vcpu
->arch
.cr3
!= sregs
->cr3
;
3966 vcpu
->arch
.cr3
= sregs
->cr3
;
3968 kvm_set_cr8(vcpu
, sregs
->cr8
);
3970 mmu_reset_needed
|= vcpu
->arch
.shadow_efer
!= sregs
->efer
;
3971 kvm_x86_ops
->set_efer(vcpu
, sregs
->efer
);
3972 kvm_set_apic_base(vcpu
, sregs
->apic_base
);
3974 kvm_x86_ops
->decache_cr4_guest_bits(vcpu
);
3976 mmu_reset_needed
|= vcpu
->arch
.cr0
!= sregs
->cr0
;
3977 kvm_x86_ops
->set_cr0(vcpu
, sregs
->cr0
);
3978 vcpu
->arch
.cr0
= sregs
->cr0
;
3980 mmu_reset_needed
|= vcpu
->arch
.cr4
!= sregs
->cr4
;
3981 kvm_x86_ops
->set_cr4(vcpu
, sregs
->cr4
);
3982 if (!is_long_mode(vcpu
) && is_pae(vcpu
))
3983 load_pdptrs(vcpu
, vcpu
->arch
.cr3
);
3985 if (mmu_reset_needed
)
3986 kvm_mmu_reset_context(vcpu
);
3988 if (!irqchip_in_kernel(vcpu
->kvm
)) {
3989 memcpy(vcpu
->arch
.irq_pending
, sregs
->interrupt_bitmap
,
3990 sizeof vcpu
->arch
.irq_pending
);
3991 vcpu
->arch
.irq_summary
= 0;
3992 for (i
= 0; i
< ARRAY_SIZE(vcpu
->arch
.irq_pending
); ++i
)
3993 if (vcpu
->arch
.irq_pending
[i
])
3994 __set_bit(i
, &vcpu
->arch
.irq_summary
);
3996 max_bits
= (sizeof sregs
->interrupt_bitmap
) << 3;
3997 pending_vec
= find_first_bit(
3998 (const unsigned long *)sregs
->interrupt_bitmap
,
4000 /* Only pending external irq is handled here */
4001 if (pending_vec
< max_bits
) {
4002 kvm_x86_ops
->set_irq(vcpu
, pending_vec
);
4003 pr_debug("Set back pending irq %d\n",
4006 kvm_pic_clear_isr_ack(vcpu
->kvm
);
4009 kvm_set_segment(vcpu
, &sregs
->cs
, VCPU_SREG_CS
);
4010 kvm_set_segment(vcpu
, &sregs
->ds
, VCPU_SREG_DS
);
4011 kvm_set_segment(vcpu
, &sregs
->es
, VCPU_SREG_ES
);
4012 kvm_set_segment(vcpu
, &sregs
->fs
, VCPU_SREG_FS
);
4013 kvm_set_segment(vcpu
, &sregs
->gs
, VCPU_SREG_GS
);
4014 kvm_set_segment(vcpu
, &sregs
->ss
, VCPU_SREG_SS
);
4016 kvm_set_segment(vcpu
, &sregs
->tr
, VCPU_SREG_TR
);
4017 kvm_set_segment(vcpu
, &sregs
->ldt
, VCPU_SREG_LDTR
);
4019 /* Older userspace won't unhalt the vcpu on reset. */
4020 if (vcpu
->vcpu_id
== 0 && kvm_rip_read(vcpu
) == 0xfff0 &&
4021 sregs
->cs
.selector
== 0xf000 && sregs
->cs
.base
== 0xffff0000 &&
4022 !(vcpu
->arch
.cr0
& X86_CR0_PE
))
4023 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
4030 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu
*vcpu
,
4031 struct kvm_guest_debug
*dbg
)
4037 if ((dbg
->control
& (KVM_GUESTDBG_ENABLE
| KVM_GUESTDBG_USE_HW_BP
)) ==
4038 (KVM_GUESTDBG_ENABLE
| KVM_GUESTDBG_USE_HW_BP
)) {
4039 for (i
= 0; i
< KVM_NR_DB_REGS
; ++i
)
4040 vcpu
->arch
.eff_db
[i
] = dbg
->arch
.debugreg
[i
];
4041 vcpu
->arch
.switch_db_regs
=
4042 (dbg
->arch
.debugreg
[7] & DR7_BP_EN_MASK
);
4044 for (i
= 0; i
< KVM_NR_DB_REGS
; i
++)
4045 vcpu
->arch
.eff_db
[i
] = vcpu
->arch
.db
[i
];
4046 vcpu
->arch
.switch_db_regs
= (vcpu
->arch
.dr7
& DR7_BP_EN_MASK
);
4049 r
= kvm_x86_ops
->set_guest_debug(vcpu
, dbg
);
4051 if (dbg
->control
& KVM_GUESTDBG_INJECT_DB
)
4052 kvm_queue_exception(vcpu
, DB_VECTOR
);
4053 else if (dbg
->control
& KVM_GUESTDBG_INJECT_BP
)
4054 kvm_queue_exception(vcpu
, BP_VECTOR
);
4062 * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
4063 * we have asm/x86/processor.h
4074 u32 st_space
[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
4075 #ifdef CONFIG_X86_64
4076 u32 xmm_space
[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
4078 u32 xmm_space
[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
4083 * Translate a guest virtual address to a guest physical address.
4085 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
4086 struct kvm_translation
*tr
)
4088 unsigned long vaddr
= tr
->linear_address
;
4092 down_read(&vcpu
->kvm
->slots_lock
);
4093 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, vaddr
);
4094 up_read(&vcpu
->kvm
->slots_lock
);
4095 tr
->physical_address
= gpa
;
4096 tr
->valid
= gpa
!= UNMAPPED_GVA
;
4104 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
)
4106 struct fxsave
*fxsave
= (struct fxsave
*)&vcpu
->arch
.guest_fx_image
;
4110 memcpy(fpu
->fpr
, fxsave
->st_space
, 128);
4111 fpu
->fcw
= fxsave
->cwd
;
4112 fpu
->fsw
= fxsave
->swd
;
4113 fpu
->ftwx
= fxsave
->twd
;
4114 fpu
->last_opcode
= fxsave
->fop
;
4115 fpu
->last_ip
= fxsave
->rip
;
4116 fpu
->last_dp
= fxsave
->rdp
;
4117 memcpy(fpu
->xmm
, fxsave
->xmm_space
, sizeof fxsave
->xmm_space
);
4124 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
)
4126 struct fxsave
*fxsave
= (struct fxsave
*)&vcpu
->arch
.guest_fx_image
;
4130 memcpy(fxsave
->st_space
, fpu
->fpr
, 128);
4131 fxsave
->cwd
= fpu
->fcw
;
4132 fxsave
->swd
= fpu
->fsw
;
4133 fxsave
->twd
= fpu
->ftwx
;
4134 fxsave
->fop
= fpu
->last_opcode
;
4135 fxsave
->rip
= fpu
->last_ip
;
4136 fxsave
->rdp
= fpu
->last_dp
;
4137 memcpy(fxsave
->xmm_space
, fpu
->xmm
, sizeof fxsave
->xmm_space
);
4144 void fx_init(struct kvm_vcpu
*vcpu
)
4146 unsigned after_mxcsr_mask
;
4149 * Touch the fpu the first time in non atomic context as if
4150 * this is the first fpu instruction the exception handler
4151 * will fire before the instruction returns and it'll have to
4152 * allocate ram with GFP_KERNEL.
4155 kvm_fx_save(&vcpu
->arch
.host_fx_image
);
4157 /* Initialize guest FPU by resetting ours and saving into guest's */
4159 kvm_fx_save(&vcpu
->arch
.host_fx_image
);
4161 kvm_fx_save(&vcpu
->arch
.guest_fx_image
);
4162 kvm_fx_restore(&vcpu
->arch
.host_fx_image
);
4165 vcpu
->arch
.cr0
|= X86_CR0_ET
;
4166 after_mxcsr_mask
= offsetof(struct i387_fxsave_struct
, st_space
);
4167 vcpu
->arch
.guest_fx_image
.mxcsr
= 0x1f80;
4168 memset((void *)&vcpu
->arch
.guest_fx_image
+ after_mxcsr_mask
,
4169 0, sizeof(struct i387_fxsave_struct
) - after_mxcsr_mask
);
4171 EXPORT_SYMBOL_GPL(fx_init
);
4173 void kvm_load_guest_fpu(struct kvm_vcpu
*vcpu
)
4175 if (!vcpu
->fpu_active
|| vcpu
->guest_fpu_loaded
)
4178 vcpu
->guest_fpu_loaded
= 1;
4179 kvm_fx_save(&vcpu
->arch
.host_fx_image
);
4180 kvm_fx_restore(&vcpu
->arch
.guest_fx_image
);
4182 EXPORT_SYMBOL_GPL(kvm_load_guest_fpu
);
4184 void kvm_put_guest_fpu(struct kvm_vcpu
*vcpu
)
4186 if (!vcpu
->guest_fpu_loaded
)
4189 vcpu
->guest_fpu_loaded
= 0;
4190 kvm_fx_save(&vcpu
->arch
.guest_fx_image
);
4191 kvm_fx_restore(&vcpu
->arch
.host_fx_image
);
4192 ++vcpu
->stat
.fpu_reload
;
4194 EXPORT_SYMBOL_GPL(kvm_put_guest_fpu
);
4196 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
)
4198 if (vcpu
->arch
.time_page
) {
4199 kvm_release_page_dirty(vcpu
->arch
.time_page
);
4200 vcpu
->arch
.time_page
= NULL
;
4203 kvm_x86_ops
->vcpu_free(vcpu
);
4206 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
,
4209 return kvm_x86_ops
->vcpu_create(kvm
, id
);
4212 int kvm_arch_vcpu_setup(struct kvm_vcpu
*vcpu
)
4216 /* We do fxsave: this must be aligned. */
4217 BUG_ON((unsigned long)&vcpu
->arch
.host_fx_image
& 0xF);
4219 vcpu
->arch
.mtrr_state
.have_fixed
= 1;
4221 r
= kvm_arch_vcpu_reset(vcpu
);
4223 r
= kvm_mmu_setup(vcpu
);
4230 kvm_x86_ops
->vcpu_free(vcpu
);
4234 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
)
4237 kvm_mmu_unload(vcpu
);
4240 kvm_x86_ops
->vcpu_free(vcpu
);
4243 int kvm_arch_vcpu_reset(struct kvm_vcpu
*vcpu
)
4245 vcpu
->arch
.nmi_pending
= false;
4246 vcpu
->arch
.nmi_injected
= false;
4248 vcpu
->arch
.switch_db_regs
= 0;
4249 memset(vcpu
->arch
.db
, 0, sizeof(vcpu
->arch
.db
));
4250 vcpu
->arch
.dr6
= DR6_FIXED_1
;
4251 vcpu
->arch
.dr7
= DR7_FIXED_1
;
4253 return kvm_x86_ops
->vcpu_reset(vcpu
);
4256 void kvm_arch_hardware_enable(void *garbage
)
4258 kvm_x86_ops
->hardware_enable(garbage
);
4261 void kvm_arch_hardware_disable(void *garbage
)
4263 kvm_x86_ops
->hardware_disable(garbage
);
4266 int kvm_arch_hardware_setup(void)
4268 return kvm_x86_ops
->hardware_setup();
4271 void kvm_arch_hardware_unsetup(void)
4273 kvm_x86_ops
->hardware_unsetup();
4276 void kvm_arch_check_processor_compat(void *rtn
)
4278 kvm_x86_ops
->check_processor_compatibility(rtn
);
4281 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
)
4287 BUG_ON(vcpu
->kvm
== NULL
);
4290 vcpu
->arch
.mmu
.root_hpa
= INVALID_PAGE
;
4291 if (!irqchip_in_kernel(kvm
) || vcpu
->vcpu_id
== 0)
4292 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
4294 vcpu
->arch
.mp_state
= KVM_MP_STATE_UNINITIALIZED
;
4296 page
= alloc_page(GFP_KERNEL
| __GFP_ZERO
);
4301 vcpu
->arch
.pio_data
= page_address(page
);
4303 r
= kvm_mmu_create(vcpu
);
4305 goto fail_free_pio_data
;
4307 if (irqchip_in_kernel(kvm
)) {
4308 r
= kvm_create_lapic(vcpu
);
4310 goto fail_mmu_destroy
;
4316 kvm_mmu_destroy(vcpu
);
4318 free_page((unsigned long)vcpu
->arch
.pio_data
);
4323 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
)
4325 kvm_free_lapic(vcpu
);
4326 down_read(&vcpu
->kvm
->slots_lock
);
4327 kvm_mmu_destroy(vcpu
);
4328 up_read(&vcpu
->kvm
->slots_lock
);
4329 free_page((unsigned long)vcpu
->arch
.pio_data
);
4332 struct kvm
*kvm_arch_create_vm(void)
4334 struct kvm
*kvm
= kzalloc(sizeof(struct kvm
), GFP_KERNEL
);
4337 return ERR_PTR(-ENOMEM
);
4339 INIT_LIST_HEAD(&kvm
->arch
.active_mmu_pages
);
4340 INIT_LIST_HEAD(&kvm
->arch
.oos_global_pages
);
4341 INIT_LIST_HEAD(&kvm
->arch
.assigned_dev_head
);
4343 /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
4344 set_bit(KVM_USERSPACE_IRQ_SOURCE_ID
, &kvm
->arch
.irq_sources_bitmap
);
4346 rdtscll(kvm
->arch
.vm_init_tsc
);
4351 static void kvm_unload_vcpu_mmu(struct kvm_vcpu
*vcpu
)
4354 kvm_mmu_unload(vcpu
);
4358 static void kvm_free_vcpus(struct kvm
*kvm
)
4363 * Unpin any mmu pages first.
4365 for (i
= 0; i
< KVM_MAX_VCPUS
; ++i
)
4367 kvm_unload_vcpu_mmu(kvm
->vcpus
[i
]);
4368 for (i
= 0; i
< KVM_MAX_VCPUS
; ++i
) {
4369 if (kvm
->vcpus
[i
]) {
4370 kvm_arch_vcpu_free(kvm
->vcpus
[i
]);
4371 kvm
->vcpus
[i
] = NULL
;
4377 void kvm_arch_sync_events(struct kvm
*kvm
)
4379 kvm_free_all_assigned_devices(kvm
);
4382 void kvm_arch_destroy_vm(struct kvm
*kvm
)
4384 kvm_iommu_unmap_guest(kvm
);
4386 kfree(kvm
->arch
.vpic
);
4387 kfree(kvm
->arch
.vioapic
);
4388 kvm_free_vcpus(kvm
);
4389 kvm_free_physmem(kvm
);
4390 if (kvm
->arch
.apic_access_page
)
4391 put_page(kvm
->arch
.apic_access_page
);
4392 if (kvm
->arch
.ept_identity_pagetable
)
4393 put_page(kvm
->arch
.ept_identity_pagetable
);
4397 int kvm_arch_set_memory_region(struct kvm
*kvm
,
4398 struct kvm_userspace_memory_region
*mem
,
4399 struct kvm_memory_slot old
,
4402 int npages
= mem
->memory_size
>> PAGE_SHIFT
;
4403 struct kvm_memory_slot
*memslot
= &kvm
->memslots
[mem
->slot
];
4405 /*To keep backward compatibility with older userspace,
4406 *x86 needs to hanlde !user_alloc case.
4409 if (npages
&& !old
.rmap
) {
4410 unsigned long userspace_addr
;
4412 down_write(¤t
->mm
->mmap_sem
);
4413 userspace_addr
= do_mmap(NULL
, 0,
4415 PROT_READ
| PROT_WRITE
,
4416 MAP_PRIVATE
| MAP_ANONYMOUS
,
4418 up_write(¤t
->mm
->mmap_sem
);
4420 if (IS_ERR((void *)userspace_addr
))
4421 return PTR_ERR((void *)userspace_addr
);
4423 /* set userspace_addr atomically for kvm_hva_to_rmapp */
4424 spin_lock(&kvm
->mmu_lock
);
4425 memslot
->userspace_addr
= userspace_addr
;
4426 spin_unlock(&kvm
->mmu_lock
);
4428 if (!old
.user_alloc
&& old
.rmap
) {
4431 down_write(¤t
->mm
->mmap_sem
);
4432 ret
= do_munmap(current
->mm
, old
.userspace_addr
,
4433 old
.npages
* PAGE_SIZE
);
4434 up_write(¤t
->mm
->mmap_sem
);
4437 "kvm_vm_ioctl_set_memory_region: "
4438 "failed to munmap memory\n");
4443 if (!kvm
->arch
.n_requested_mmu_pages
) {
4444 unsigned int nr_mmu_pages
= kvm_mmu_calculate_mmu_pages(kvm
);
4445 kvm_mmu_change_mmu_pages(kvm
, nr_mmu_pages
);
4448 kvm_mmu_slot_remove_write_access(kvm
, mem
->slot
);
4449 kvm_flush_remote_tlbs(kvm
);
4454 void kvm_arch_flush_shadow(struct kvm
*kvm
)
4456 kvm_mmu_zap_all(kvm
);
4459 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
)
4461 return vcpu
->arch
.mp_state
== KVM_MP_STATE_RUNNABLE
4462 || vcpu
->arch
.mp_state
== KVM_MP_STATE_SIPI_RECEIVED
4463 || vcpu
->arch
.nmi_pending
;
4466 static void vcpu_kick_intr(void *info
)
4469 struct kvm_vcpu
*vcpu
= (struct kvm_vcpu
*)info
;
4470 printk(KERN_DEBUG
"vcpu_kick_intr %p \n", vcpu
);
4474 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
)
4476 int ipi_pcpu
= vcpu
->cpu
;
4477 int cpu
= get_cpu();
4479 if (waitqueue_active(&vcpu
->wq
)) {
4480 wake_up_interruptible(&vcpu
->wq
);
4481 ++vcpu
->stat
.halt_wakeup
;
4484 * We may be called synchronously with irqs disabled in guest mode,
4485 * So need not to call smp_call_function_single() in that case.
4487 if (vcpu
->guest_mode
&& vcpu
->cpu
!= cpu
)
4488 smp_call_function_single(ipi_pcpu
, vcpu_kick_intr
, vcpu
, 0);
4492 int kvm_arch_interrupt_allowed(struct kvm_vcpu
*vcpu
)
4494 return kvm_x86_ops
->interrupt_allowed(vcpu
);