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 if (cr4
& CR4_RESERVED_BITS
) {
342 printk(KERN_DEBUG
"set_cr4: #GP, reserved bits\n");
343 kvm_inject_gp(vcpu
, 0);
347 if (is_long_mode(vcpu
)) {
348 if (!(cr4
& X86_CR4_PAE
)) {
349 printk(KERN_DEBUG
"set_cr4: #GP, clearing PAE while "
351 kvm_inject_gp(vcpu
, 0);
354 } else if (is_paging(vcpu
) && !is_pae(vcpu
) && (cr4
& X86_CR4_PAE
)
355 && !load_pdptrs(vcpu
, vcpu
->arch
.cr3
)) {
356 printk(KERN_DEBUG
"set_cr4: #GP, pdptrs reserved bits\n");
357 kvm_inject_gp(vcpu
, 0);
361 if (cr4
& X86_CR4_VMXE
) {
362 printk(KERN_DEBUG
"set_cr4: #GP, setting VMXE\n");
363 kvm_inject_gp(vcpu
, 0);
366 kvm_x86_ops
->set_cr4(vcpu
, cr4
);
367 vcpu
->arch
.cr4
= cr4
;
368 vcpu
->arch
.mmu
.base_role
.cr4_pge
= (cr4
& X86_CR4_PGE
) && !tdp_enabled
;
369 kvm_mmu_sync_global(vcpu
);
370 kvm_mmu_reset_context(vcpu
);
372 EXPORT_SYMBOL_GPL(kvm_set_cr4
);
374 void kvm_set_cr3(struct kvm_vcpu
*vcpu
, unsigned long cr3
)
376 if (cr3
== vcpu
->arch
.cr3
&& !pdptrs_changed(vcpu
)) {
377 kvm_mmu_sync_roots(vcpu
);
378 kvm_mmu_flush_tlb(vcpu
);
382 if (is_long_mode(vcpu
)) {
383 if (cr3
& CR3_L_MODE_RESERVED_BITS
) {
384 printk(KERN_DEBUG
"set_cr3: #GP, reserved bits\n");
385 kvm_inject_gp(vcpu
, 0);
390 if (cr3
& CR3_PAE_RESERVED_BITS
) {
392 "set_cr3: #GP, reserved bits\n");
393 kvm_inject_gp(vcpu
, 0);
396 if (is_paging(vcpu
) && !load_pdptrs(vcpu
, cr3
)) {
397 printk(KERN_DEBUG
"set_cr3: #GP, pdptrs "
399 kvm_inject_gp(vcpu
, 0);
404 * We don't check reserved bits in nonpae mode, because
405 * this isn't enforced, and VMware depends on this.
410 * Does the new cr3 value map to physical memory? (Note, we
411 * catch an invalid cr3 even in real-mode, because it would
412 * cause trouble later on when we turn on paging anyway.)
414 * A real CPU would silently accept an invalid cr3 and would
415 * attempt to use it - with largely undefined (and often hard
416 * to debug) behavior on the guest side.
418 if (unlikely(!gfn_to_memslot(vcpu
->kvm
, cr3
>> PAGE_SHIFT
)))
419 kvm_inject_gp(vcpu
, 0);
421 vcpu
->arch
.cr3
= cr3
;
422 vcpu
->arch
.mmu
.new_cr3(vcpu
);
425 EXPORT_SYMBOL_GPL(kvm_set_cr3
);
427 void kvm_set_cr8(struct kvm_vcpu
*vcpu
, unsigned long cr8
)
429 if (cr8
& CR8_RESERVED_BITS
) {
430 printk(KERN_DEBUG
"set_cr8: #GP, reserved bits 0x%lx\n", cr8
);
431 kvm_inject_gp(vcpu
, 0);
434 if (irqchip_in_kernel(vcpu
->kvm
))
435 kvm_lapic_set_tpr(vcpu
, cr8
);
437 vcpu
->arch
.cr8
= cr8
;
439 EXPORT_SYMBOL_GPL(kvm_set_cr8
);
441 unsigned long kvm_get_cr8(struct kvm_vcpu
*vcpu
)
443 if (irqchip_in_kernel(vcpu
->kvm
))
444 return kvm_lapic_get_cr8(vcpu
);
446 return vcpu
->arch
.cr8
;
448 EXPORT_SYMBOL_GPL(kvm_get_cr8
);
450 static inline u32
bit(int bitno
)
452 return 1 << (bitno
& 31);
456 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
457 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
459 * This list is modified at module load time to reflect the
460 * capabilities of the host cpu.
462 static u32 msrs_to_save
[] = {
463 MSR_IA32_SYSENTER_CS
, MSR_IA32_SYSENTER_ESP
, MSR_IA32_SYSENTER_EIP
,
466 MSR_CSTAR
, MSR_KERNEL_GS_BASE
, MSR_SYSCALL_MASK
, MSR_LSTAR
,
468 MSR_IA32_TIME_STAMP_COUNTER
, MSR_KVM_SYSTEM_TIME
, MSR_KVM_WALL_CLOCK
,
469 MSR_IA32_PERF_STATUS
, MSR_IA32_CR_PAT
, MSR_VM_HSAVE_PA
472 static unsigned num_msrs_to_save
;
474 static u32 emulated_msrs
[] = {
475 MSR_IA32_MISC_ENABLE
,
478 static void set_efer(struct kvm_vcpu
*vcpu
, u64 efer
)
480 if (efer
& efer_reserved_bits
) {
481 printk(KERN_DEBUG
"set_efer: 0x%llx #GP, reserved bits\n",
483 kvm_inject_gp(vcpu
, 0);
488 && (vcpu
->arch
.shadow_efer
& EFER_LME
) != (efer
& EFER_LME
)) {
489 printk(KERN_DEBUG
"set_efer: #GP, change LME while paging\n");
490 kvm_inject_gp(vcpu
, 0);
494 if (efer
& EFER_FFXSR
) {
495 struct kvm_cpuid_entry2
*feat
;
497 feat
= kvm_find_cpuid_entry(vcpu
, 0x80000001, 0);
498 if (!feat
|| !(feat
->edx
& bit(X86_FEATURE_FXSR_OPT
))) {
499 printk(KERN_DEBUG
"set_efer: #GP, enable FFXSR w/o CPUID capability\n");
500 kvm_inject_gp(vcpu
, 0);
505 if (efer
& EFER_SVME
) {
506 struct kvm_cpuid_entry2
*feat
;
508 feat
= kvm_find_cpuid_entry(vcpu
, 0x80000001, 0);
509 if (!feat
|| !(feat
->ecx
& bit(X86_FEATURE_SVM
))) {
510 printk(KERN_DEBUG
"set_efer: #GP, enable SVM w/o SVM\n");
511 kvm_inject_gp(vcpu
, 0);
516 kvm_x86_ops
->set_efer(vcpu
, efer
);
519 efer
|= vcpu
->arch
.shadow_efer
& EFER_LMA
;
521 vcpu
->arch
.shadow_efer
= efer
;
524 void kvm_enable_efer_bits(u64 mask
)
526 efer_reserved_bits
&= ~mask
;
528 EXPORT_SYMBOL_GPL(kvm_enable_efer_bits
);
532 * Writes msr value into into the appropriate "register".
533 * Returns 0 on success, non-0 otherwise.
534 * Assumes vcpu_load() was already called.
536 int kvm_set_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64 data
)
538 return kvm_x86_ops
->set_msr(vcpu
, msr_index
, data
);
542 * Adapt set_msr() to msr_io()'s calling convention
544 static int do_set_msr(struct kvm_vcpu
*vcpu
, unsigned index
, u64
*data
)
546 return kvm_set_msr(vcpu
, index
, *data
);
549 static void kvm_write_wall_clock(struct kvm
*kvm
, gpa_t wall_clock
)
552 struct pvclock_wall_clock wc
;
553 struct timespec now
, sys
, boot
;
560 kvm_write_guest(kvm
, wall_clock
, &version
, sizeof(version
));
563 * The guest calculates current wall clock time by adding
564 * system time (updated by kvm_write_guest_time below) to the
565 * wall clock specified here. guest system time equals host
566 * system time for us, thus we must fill in host boot time here.
568 now
= current_kernel_time();
570 boot
= ns_to_timespec(timespec_to_ns(&now
) - timespec_to_ns(&sys
));
572 wc
.sec
= boot
.tv_sec
;
573 wc
.nsec
= boot
.tv_nsec
;
574 wc
.version
= version
;
576 kvm_write_guest(kvm
, wall_clock
, &wc
, sizeof(wc
));
579 kvm_write_guest(kvm
, wall_clock
, &version
, sizeof(version
));
582 static uint32_t div_frac(uint32_t dividend
, uint32_t divisor
)
584 uint32_t quotient
, remainder
;
586 /* Don't try to replace with do_div(), this one calculates
587 * "(dividend << 32) / divisor" */
589 : "=a" (quotient
), "=d" (remainder
)
590 : "0" (0), "1" (dividend
), "r" (divisor
) );
594 static void kvm_set_time_scale(uint32_t tsc_khz
, struct pvclock_vcpu_time_info
*hv_clock
)
596 uint64_t nsecs
= 1000000000LL;
601 tps64
= tsc_khz
* 1000LL;
602 while (tps64
> nsecs
*2) {
607 tps32
= (uint32_t)tps64
;
608 while (tps32
<= (uint32_t)nsecs
) {
613 hv_clock
->tsc_shift
= shift
;
614 hv_clock
->tsc_to_system_mul
= div_frac(nsecs
, tps32
);
616 pr_debug("%s: tsc_khz %u, tsc_shift %d, tsc_mul %u\n",
617 __func__
, tsc_khz
, hv_clock
->tsc_shift
,
618 hv_clock
->tsc_to_system_mul
);
621 static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz
);
623 static void kvm_write_guest_time(struct kvm_vcpu
*v
)
627 struct kvm_vcpu_arch
*vcpu
= &v
->arch
;
630 if ((!vcpu
->time_page
))
633 if (unlikely(vcpu
->hv_clock_tsc_khz
!= __get_cpu_var(cpu_tsc_khz
))) {
634 kvm_set_time_scale(__get_cpu_var(cpu_tsc_khz
), &vcpu
->hv_clock
);
635 vcpu
->hv_clock_tsc_khz
= __get_cpu_var(cpu_tsc_khz
);
638 /* Keep irq disabled to prevent changes to the clock */
639 local_irq_save(flags
);
640 kvm_get_msr(v
, MSR_IA32_TIME_STAMP_COUNTER
,
641 &vcpu
->hv_clock
.tsc_timestamp
);
643 local_irq_restore(flags
);
645 /* With all the info we got, fill in the values */
647 vcpu
->hv_clock
.system_time
= ts
.tv_nsec
+
648 (NSEC_PER_SEC
* (u64
)ts
.tv_sec
);
650 * The interface expects us to write an even number signaling that the
651 * update is finished. Since the guest won't see the intermediate
652 * state, we just increase by 2 at the end.
654 vcpu
->hv_clock
.version
+= 2;
656 shared_kaddr
= kmap_atomic(vcpu
->time_page
, KM_USER0
);
658 memcpy(shared_kaddr
+ vcpu
->time_offset
, &vcpu
->hv_clock
,
659 sizeof(vcpu
->hv_clock
));
661 kunmap_atomic(shared_kaddr
, KM_USER0
);
663 mark_page_dirty(v
->kvm
, vcpu
->time
>> PAGE_SHIFT
);
666 static int kvm_request_guest_time_update(struct kvm_vcpu
*v
)
668 struct kvm_vcpu_arch
*vcpu
= &v
->arch
;
670 if (!vcpu
->time_page
)
672 set_bit(KVM_REQ_KVMCLOCK_UPDATE
, &v
->requests
);
676 static bool msr_mtrr_valid(unsigned msr
)
679 case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR
- 1:
680 case MSR_MTRRfix64K_00000
:
681 case MSR_MTRRfix16K_80000
:
682 case MSR_MTRRfix16K_A0000
:
683 case MSR_MTRRfix4K_C0000
:
684 case MSR_MTRRfix4K_C8000
:
685 case MSR_MTRRfix4K_D0000
:
686 case MSR_MTRRfix4K_D8000
:
687 case MSR_MTRRfix4K_E0000
:
688 case MSR_MTRRfix4K_E8000
:
689 case MSR_MTRRfix4K_F0000
:
690 case MSR_MTRRfix4K_F8000
:
691 case MSR_MTRRdefType
:
692 case MSR_IA32_CR_PAT
:
700 static int set_msr_mtrr(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
702 u64
*p
= (u64
*)&vcpu
->arch
.mtrr_state
.fixed_ranges
;
704 if (!msr_mtrr_valid(msr
))
707 if (msr
== MSR_MTRRdefType
) {
708 vcpu
->arch
.mtrr_state
.def_type
= data
;
709 vcpu
->arch
.mtrr_state
.enabled
= (data
& 0xc00) >> 10;
710 } else if (msr
== MSR_MTRRfix64K_00000
)
712 else if (msr
== MSR_MTRRfix16K_80000
|| msr
== MSR_MTRRfix16K_A0000
)
713 p
[1 + msr
- MSR_MTRRfix16K_80000
] = data
;
714 else if (msr
>= MSR_MTRRfix4K_C0000
&& msr
<= MSR_MTRRfix4K_F8000
)
715 p
[3 + msr
- MSR_MTRRfix4K_C0000
] = data
;
716 else if (msr
== MSR_IA32_CR_PAT
)
717 vcpu
->arch
.pat
= data
;
718 else { /* Variable MTRRs */
719 int idx
, is_mtrr_mask
;
722 idx
= (msr
- 0x200) / 2;
723 is_mtrr_mask
= msr
- 0x200 - 2 * idx
;
726 (u64
*)&vcpu
->arch
.mtrr_state
.var_ranges
[idx
].base_lo
;
729 (u64
*)&vcpu
->arch
.mtrr_state
.var_ranges
[idx
].mask_lo
;
733 kvm_mmu_reset_context(vcpu
);
737 int kvm_set_msr_common(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
741 set_efer(vcpu
, data
);
743 case MSR_IA32_MC0_STATUS
:
744 pr_unimpl(vcpu
, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n",
747 case MSR_IA32_MCG_STATUS
:
748 pr_unimpl(vcpu
, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n",
751 case MSR_IA32_MCG_CTL
:
752 pr_unimpl(vcpu
, "%s: MSR_IA32_MCG_CTL 0x%llx, nop\n",
755 case MSR_IA32_DEBUGCTLMSR
:
757 /* We support the non-activated case already */
759 } else if (data
& ~(DEBUGCTLMSR_LBR
| DEBUGCTLMSR_BTF
)) {
760 /* Values other than LBR and BTF are vendor-specific,
761 thus reserved and should throw a #GP */
764 pr_unimpl(vcpu
, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n",
767 case MSR_IA32_UCODE_REV
:
768 case MSR_IA32_UCODE_WRITE
:
769 case MSR_VM_HSAVE_PA
:
771 case 0x200 ... 0x2ff:
772 return set_msr_mtrr(vcpu
, msr
, data
);
773 case MSR_IA32_APICBASE
:
774 kvm_set_apic_base(vcpu
, data
);
776 case MSR_IA32_MISC_ENABLE
:
777 vcpu
->arch
.ia32_misc_enable_msr
= data
;
779 case MSR_KVM_WALL_CLOCK
:
780 vcpu
->kvm
->arch
.wall_clock
= data
;
781 kvm_write_wall_clock(vcpu
->kvm
, data
);
783 case MSR_KVM_SYSTEM_TIME
: {
784 if (vcpu
->arch
.time_page
) {
785 kvm_release_page_dirty(vcpu
->arch
.time_page
);
786 vcpu
->arch
.time_page
= NULL
;
789 vcpu
->arch
.time
= data
;
791 /* we verify if the enable bit is set... */
795 /* ...but clean it before doing the actual write */
796 vcpu
->arch
.time_offset
= data
& ~(PAGE_MASK
| 1);
798 vcpu
->arch
.time_page
=
799 gfn_to_page(vcpu
->kvm
, data
>> PAGE_SHIFT
);
801 if (is_error_page(vcpu
->arch
.time_page
)) {
802 kvm_release_page_clean(vcpu
->arch
.time_page
);
803 vcpu
->arch
.time_page
= NULL
;
806 kvm_request_guest_time_update(vcpu
);
810 pr_unimpl(vcpu
, "unhandled wrmsr: 0x%x data %llx\n", msr
, data
);
815 EXPORT_SYMBOL_GPL(kvm_set_msr_common
);
819 * Reads an msr value (of 'msr_index') into 'pdata'.
820 * Returns 0 on success, non-0 otherwise.
821 * Assumes vcpu_load() was already called.
823 int kvm_get_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64
*pdata
)
825 return kvm_x86_ops
->get_msr(vcpu
, msr_index
, pdata
);
828 static int get_msr_mtrr(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
)
830 u64
*p
= (u64
*)&vcpu
->arch
.mtrr_state
.fixed_ranges
;
832 if (!msr_mtrr_valid(msr
))
835 if (msr
== MSR_MTRRdefType
)
836 *pdata
= vcpu
->arch
.mtrr_state
.def_type
+
837 (vcpu
->arch
.mtrr_state
.enabled
<< 10);
838 else if (msr
== MSR_MTRRfix64K_00000
)
840 else if (msr
== MSR_MTRRfix16K_80000
|| msr
== MSR_MTRRfix16K_A0000
)
841 *pdata
= p
[1 + msr
- MSR_MTRRfix16K_80000
];
842 else if (msr
>= MSR_MTRRfix4K_C0000
&& msr
<= MSR_MTRRfix4K_F8000
)
843 *pdata
= p
[3 + msr
- MSR_MTRRfix4K_C0000
];
844 else if (msr
== MSR_IA32_CR_PAT
)
845 *pdata
= vcpu
->arch
.pat
;
846 else { /* Variable MTRRs */
847 int idx
, is_mtrr_mask
;
850 idx
= (msr
- 0x200) / 2;
851 is_mtrr_mask
= msr
- 0x200 - 2 * idx
;
854 (u64
*)&vcpu
->arch
.mtrr_state
.var_ranges
[idx
].base_lo
;
857 (u64
*)&vcpu
->arch
.mtrr_state
.var_ranges
[idx
].mask_lo
;
864 int kvm_get_msr_common(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
)
869 case 0xc0010010: /* SYSCFG */
870 case 0xc0010015: /* HWCR */
871 case MSR_IA32_PLATFORM_ID
:
872 case MSR_IA32_P5_MC_ADDR
:
873 case MSR_IA32_P5_MC_TYPE
:
874 case MSR_IA32_MC0_CTL
:
875 case MSR_IA32_MCG_STATUS
:
876 case MSR_IA32_MCG_CAP
:
877 case MSR_IA32_MCG_CTL
:
878 case MSR_IA32_MC0_MISC
:
879 case MSR_IA32_MC0_MISC
+4:
880 case MSR_IA32_MC0_MISC
+8:
881 case MSR_IA32_MC0_MISC
+12:
882 case MSR_IA32_MC0_MISC
+16:
883 case MSR_IA32_MC0_MISC
+20:
884 case MSR_IA32_UCODE_REV
:
885 case MSR_IA32_EBL_CR_POWERON
:
886 case MSR_IA32_DEBUGCTLMSR
:
887 case MSR_IA32_LASTBRANCHFROMIP
:
888 case MSR_IA32_LASTBRANCHTOIP
:
889 case MSR_IA32_LASTINTFROMIP
:
890 case MSR_IA32_LASTINTTOIP
:
891 case MSR_VM_HSAVE_PA
:
895 data
= 0x500 | KVM_NR_VAR_MTRR
;
897 case 0x200 ... 0x2ff:
898 return get_msr_mtrr(vcpu
, msr
, pdata
);
899 case 0xcd: /* fsb frequency */
902 case MSR_IA32_APICBASE
:
903 data
= kvm_get_apic_base(vcpu
);
905 case MSR_IA32_MISC_ENABLE
:
906 data
= vcpu
->arch
.ia32_misc_enable_msr
;
908 case MSR_IA32_PERF_STATUS
:
909 /* TSC increment by tick */
912 data
|= (((uint64_t)4ULL) << 40);
915 data
= vcpu
->arch
.shadow_efer
;
917 case MSR_KVM_WALL_CLOCK
:
918 data
= vcpu
->kvm
->arch
.wall_clock
;
920 case MSR_KVM_SYSTEM_TIME
:
921 data
= vcpu
->arch
.time
;
924 pr_unimpl(vcpu
, "unhandled rdmsr: 0x%x\n", msr
);
930 EXPORT_SYMBOL_GPL(kvm_get_msr_common
);
933 * Read or write a bunch of msrs. All parameters are kernel addresses.
935 * @return number of msrs set successfully.
937 static int __msr_io(struct kvm_vcpu
*vcpu
, struct kvm_msrs
*msrs
,
938 struct kvm_msr_entry
*entries
,
939 int (*do_msr
)(struct kvm_vcpu
*vcpu
,
940 unsigned index
, u64
*data
))
946 down_read(&vcpu
->kvm
->slots_lock
);
947 for (i
= 0; i
< msrs
->nmsrs
; ++i
)
948 if (do_msr(vcpu
, entries
[i
].index
, &entries
[i
].data
))
950 up_read(&vcpu
->kvm
->slots_lock
);
958 * Read or write a bunch of msrs. Parameters are user addresses.
960 * @return number of msrs set successfully.
962 static int msr_io(struct kvm_vcpu
*vcpu
, struct kvm_msrs __user
*user_msrs
,
963 int (*do_msr
)(struct kvm_vcpu
*vcpu
,
964 unsigned index
, u64
*data
),
967 struct kvm_msrs msrs
;
968 struct kvm_msr_entry
*entries
;
973 if (copy_from_user(&msrs
, user_msrs
, sizeof msrs
))
977 if (msrs
.nmsrs
>= MAX_IO_MSRS
)
981 size
= sizeof(struct kvm_msr_entry
) * msrs
.nmsrs
;
982 entries
= vmalloc(size
);
987 if (copy_from_user(entries
, user_msrs
->entries
, size
))
990 r
= n
= __msr_io(vcpu
, &msrs
, entries
, do_msr
);
995 if (writeback
&& copy_to_user(user_msrs
->entries
, entries
, size
))
1006 int kvm_dev_ioctl_check_extension(long ext
)
1011 case KVM_CAP_IRQCHIP
:
1013 case KVM_CAP_MMU_SHADOW_CACHE_CONTROL
:
1014 case KVM_CAP_SET_TSS_ADDR
:
1015 case KVM_CAP_EXT_CPUID
:
1016 case KVM_CAP_CLOCKSOURCE
:
1018 case KVM_CAP_NOP_IO_DELAY
:
1019 case KVM_CAP_MP_STATE
:
1020 case KVM_CAP_SYNC_MMU
:
1021 case KVM_CAP_REINJECT_CONTROL
:
1022 case KVM_CAP_IRQ_INJECT_STATUS
:
1025 case KVM_CAP_COALESCED_MMIO
:
1026 r
= KVM_COALESCED_MMIO_PAGE_OFFSET
;
1029 r
= !kvm_x86_ops
->cpu_has_accelerated_tpr();
1031 case KVM_CAP_NR_VCPUS
:
1034 case KVM_CAP_NR_MEMSLOTS
:
1035 r
= KVM_MEMORY_SLOTS
;
1037 case KVM_CAP_PV_MMU
:
1051 long kvm_arch_dev_ioctl(struct file
*filp
,
1052 unsigned int ioctl
, unsigned long arg
)
1054 void __user
*argp
= (void __user
*)arg
;
1058 case KVM_GET_MSR_INDEX_LIST
: {
1059 struct kvm_msr_list __user
*user_msr_list
= argp
;
1060 struct kvm_msr_list msr_list
;
1064 if (copy_from_user(&msr_list
, user_msr_list
, sizeof msr_list
))
1067 msr_list
.nmsrs
= num_msrs_to_save
+ ARRAY_SIZE(emulated_msrs
);
1068 if (copy_to_user(user_msr_list
, &msr_list
, sizeof msr_list
))
1071 if (n
< num_msrs_to_save
)
1074 if (copy_to_user(user_msr_list
->indices
, &msrs_to_save
,
1075 num_msrs_to_save
* sizeof(u32
)))
1077 if (copy_to_user(user_msr_list
->indices
1078 + num_msrs_to_save
* sizeof(u32
),
1080 ARRAY_SIZE(emulated_msrs
) * sizeof(u32
)))
1085 case KVM_GET_SUPPORTED_CPUID
: {
1086 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
1087 struct kvm_cpuid2 cpuid
;
1090 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1092 r
= kvm_dev_ioctl_get_supported_cpuid(&cpuid
,
1093 cpuid_arg
->entries
);
1098 if (copy_to_user(cpuid_arg
, &cpuid
, sizeof cpuid
))
1110 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
)
1112 kvm_x86_ops
->vcpu_load(vcpu
, cpu
);
1113 kvm_request_guest_time_update(vcpu
);
1116 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
)
1118 kvm_x86_ops
->vcpu_put(vcpu
);
1119 kvm_put_guest_fpu(vcpu
);
1122 static int is_efer_nx(void)
1126 rdmsrl(MSR_EFER
, efer
);
1127 return efer
& EFER_NX
;
1130 static void cpuid_fix_nx_cap(struct kvm_vcpu
*vcpu
)
1133 struct kvm_cpuid_entry2
*e
, *entry
;
1136 for (i
= 0; i
< vcpu
->arch
.cpuid_nent
; ++i
) {
1137 e
= &vcpu
->arch
.cpuid_entries
[i
];
1138 if (e
->function
== 0x80000001) {
1143 if (entry
&& (entry
->edx
& (1 << 20)) && !is_efer_nx()) {
1144 entry
->edx
&= ~(1 << 20);
1145 printk(KERN_INFO
"kvm: guest NX capability removed\n");
1149 /* when an old userspace process fills a new kernel module */
1150 static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu
*vcpu
,
1151 struct kvm_cpuid
*cpuid
,
1152 struct kvm_cpuid_entry __user
*entries
)
1155 struct kvm_cpuid_entry
*cpuid_entries
;
1158 if (cpuid
->nent
> KVM_MAX_CPUID_ENTRIES
)
1161 cpuid_entries
= vmalloc(sizeof(struct kvm_cpuid_entry
) * cpuid
->nent
);
1165 if (copy_from_user(cpuid_entries
, entries
,
1166 cpuid
->nent
* sizeof(struct kvm_cpuid_entry
)))
1168 for (i
= 0; i
< cpuid
->nent
; i
++) {
1169 vcpu
->arch
.cpuid_entries
[i
].function
= cpuid_entries
[i
].function
;
1170 vcpu
->arch
.cpuid_entries
[i
].eax
= cpuid_entries
[i
].eax
;
1171 vcpu
->arch
.cpuid_entries
[i
].ebx
= cpuid_entries
[i
].ebx
;
1172 vcpu
->arch
.cpuid_entries
[i
].ecx
= cpuid_entries
[i
].ecx
;
1173 vcpu
->arch
.cpuid_entries
[i
].edx
= cpuid_entries
[i
].edx
;
1174 vcpu
->arch
.cpuid_entries
[i
].index
= 0;
1175 vcpu
->arch
.cpuid_entries
[i
].flags
= 0;
1176 vcpu
->arch
.cpuid_entries
[i
].padding
[0] = 0;
1177 vcpu
->arch
.cpuid_entries
[i
].padding
[1] = 0;
1178 vcpu
->arch
.cpuid_entries
[i
].padding
[2] = 0;
1180 vcpu
->arch
.cpuid_nent
= cpuid
->nent
;
1181 cpuid_fix_nx_cap(vcpu
);
1185 vfree(cpuid_entries
);
1190 static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu
*vcpu
,
1191 struct kvm_cpuid2
*cpuid
,
1192 struct kvm_cpuid_entry2 __user
*entries
)
1197 if (cpuid
->nent
> KVM_MAX_CPUID_ENTRIES
)
1200 if (copy_from_user(&vcpu
->arch
.cpuid_entries
, entries
,
1201 cpuid
->nent
* sizeof(struct kvm_cpuid_entry2
)))
1203 vcpu
->arch
.cpuid_nent
= cpuid
->nent
;
1210 static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu
*vcpu
,
1211 struct kvm_cpuid2
*cpuid
,
1212 struct kvm_cpuid_entry2 __user
*entries
)
1217 if (cpuid
->nent
< vcpu
->arch
.cpuid_nent
)
1220 if (copy_to_user(entries
, &vcpu
->arch
.cpuid_entries
,
1221 vcpu
->arch
.cpuid_nent
* sizeof(struct kvm_cpuid_entry2
)))
1226 cpuid
->nent
= vcpu
->arch
.cpuid_nent
;
1230 static void do_cpuid_1_ent(struct kvm_cpuid_entry2
*entry
, u32 function
,
1233 entry
->function
= function
;
1234 entry
->index
= index
;
1235 cpuid_count(entry
->function
, entry
->index
,
1236 &entry
->eax
, &entry
->ebx
, &entry
->ecx
, &entry
->edx
);
1240 static void do_cpuid_ent(struct kvm_cpuid_entry2
*entry
, u32 function
,
1241 u32 index
, int *nent
, int maxnent
)
1243 const u32 kvm_supported_word0_x86_features
= bit(X86_FEATURE_FPU
) |
1244 bit(X86_FEATURE_VME
) | bit(X86_FEATURE_DE
) |
1245 bit(X86_FEATURE_PSE
) | bit(X86_FEATURE_TSC
) |
1246 bit(X86_FEATURE_MSR
) | bit(X86_FEATURE_PAE
) |
1247 bit(X86_FEATURE_CX8
) | bit(X86_FEATURE_APIC
) |
1248 bit(X86_FEATURE_SEP
) | bit(X86_FEATURE_PGE
) |
1249 bit(X86_FEATURE_CMOV
) | bit(X86_FEATURE_PSE36
) |
1250 bit(X86_FEATURE_CLFLSH
) | bit(X86_FEATURE_MMX
) |
1251 bit(X86_FEATURE_FXSR
) | bit(X86_FEATURE_XMM
) |
1252 bit(X86_FEATURE_XMM2
) | bit(X86_FEATURE_SELFSNOOP
);
1253 const u32 kvm_supported_word1_x86_features
= bit(X86_FEATURE_FPU
) |
1254 bit(X86_FEATURE_VME
) | bit(X86_FEATURE_DE
) |
1255 bit(X86_FEATURE_PSE
) | bit(X86_FEATURE_TSC
) |
1256 bit(X86_FEATURE_MSR
) | bit(X86_FEATURE_PAE
) |
1257 bit(X86_FEATURE_CX8
) | bit(X86_FEATURE_APIC
) |
1258 bit(X86_FEATURE_PGE
) |
1259 bit(X86_FEATURE_CMOV
) | bit(X86_FEATURE_PSE36
) |
1260 bit(X86_FEATURE_MMX
) | bit(X86_FEATURE_FXSR
) |
1261 bit(X86_FEATURE_SYSCALL
) |
1262 (bit(X86_FEATURE_NX
) && is_efer_nx()) |
1263 #ifdef CONFIG_X86_64
1264 bit(X86_FEATURE_LM
) |
1266 bit(X86_FEATURE_FXSR_OPT
) |
1267 bit(X86_FEATURE_MMXEXT
) |
1268 bit(X86_FEATURE_3DNOWEXT
) |
1269 bit(X86_FEATURE_3DNOW
);
1270 const u32 kvm_supported_word3_x86_features
=
1271 bit(X86_FEATURE_XMM3
) | bit(X86_FEATURE_CX16
);
1272 const u32 kvm_supported_word6_x86_features
=
1273 bit(X86_FEATURE_LAHF_LM
) | bit(X86_FEATURE_CMP_LEGACY
) |
1274 bit(X86_FEATURE_SVM
);
1276 /* all calls to cpuid_count() should be made on the same cpu */
1278 do_cpuid_1_ent(entry
, function
, index
);
1283 entry
->eax
= min(entry
->eax
, (u32
)0xb);
1286 entry
->edx
&= kvm_supported_word0_x86_features
;
1287 entry
->ecx
&= kvm_supported_word3_x86_features
;
1289 /* function 2 entries are STATEFUL. That is, repeated cpuid commands
1290 * may return different values. This forces us to get_cpu() before
1291 * issuing the first command, and also to emulate this annoying behavior
1292 * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */
1294 int t
, times
= entry
->eax
& 0xff;
1296 entry
->flags
|= KVM_CPUID_FLAG_STATEFUL_FUNC
;
1297 entry
->flags
|= KVM_CPUID_FLAG_STATE_READ_NEXT
;
1298 for (t
= 1; t
< times
&& *nent
< maxnent
; ++t
) {
1299 do_cpuid_1_ent(&entry
[t
], function
, 0);
1300 entry
[t
].flags
|= KVM_CPUID_FLAG_STATEFUL_FUNC
;
1305 /* function 4 and 0xb have additional index. */
1309 entry
->flags
|= KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1310 /* read more entries until cache_type is zero */
1311 for (i
= 1; *nent
< maxnent
; ++i
) {
1312 cache_type
= entry
[i
- 1].eax
& 0x1f;
1315 do_cpuid_1_ent(&entry
[i
], function
, i
);
1317 KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1325 entry
->flags
|= KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1326 /* read more entries until level_type is zero */
1327 for (i
= 1; *nent
< maxnent
; ++i
) {
1328 level_type
= entry
[i
- 1].ecx
& 0xff00;
1331 do_cpuid_1_ent(&entry
[i
], function
, i
);
1333 KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1339 entry
->eax
= min(entry
->eax
, 0x8000001a);
1342 entry
->edx
&= kvm_supported_word1_x86_features
;
1343 entry
->ecx
&= kvm_supported_word6_x86_features
;
1349 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2
*cpuid
,
1350 struct kvm_cpuid_entry2 __user
*entries
)
1352 struct kvm_cpuid_entry2
*cpuid_entries
;
1353 int limit
, nent
= 0, r
= -E2BIG
;
1356 if (cpuid
->nent
< 1)
1359 cpuid_entries
= vmalloc(sizeof(struct kvm_cpuid_entry2
) * cpuid
->nent
);
1363 do_cpuid_ent(&cpuid_entries
[0], 0, 0, &nent
, cpuid
->nent
);
1364 limit
= cpuid_entries
[0].eax
;
1365 for (func
= 1; func
<= limit
&& nent
< cpuid
->nent
; ++func
)
1366 do_cpuid_ent(&cpuid_entries
[nent
], func
, 0,
1367 &nent
, cpuid
->nent
);
1369 if (nent
>= cpuid
->nent
)
1372 do_cpuid_ent(&cpuid_entries
[nent
], 0x80000000, 0, &nent
, cpuid
->nent
);
1373 limit
= cpuid_entries
[nent
- 1].eax
;
1374 for (func
= 0x80000001; func
<= limit
&& nent
< cpuid
->nent
; ++func
)
1375 do_cpuid_ent(&cpuid_entries
[nent
], func
, 0,
1376 &nent
, cpuid
->nent
);
1378 if (copy_to_user(entries
, cpuid_entries
,
1379 nent
* sizeof(struct kvm_cpuid_entry2
)))
1385 vfree(cpuid_entries
);
1390 static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu
*vcpu
,
1391 struct kvm_lapic_state
*s
)
1394 memcpy(s
->regs
, vcpu
->arch
.apic
->regs
, sizeof *s
);
1400 static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu
*vcpu
,
1401 struct kvm_lapic_state
*s
)
1404 memcpy(vcpu
->arch
.apic
->regs
, s
->regs
, sizeof *s
);
1405 kvm_apic_post_state_restore(vcpu
);
1411 static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu
*vcpu
,
1412 struct kvm_interrupt
*irq
)
1414 if (irq
->irq
< 0 || irq
->irq
>= 256)
1416 if (irqchip_in_kernel(vcpu
->kvm
))
1420 set_bit(irq
->irq
, vcpu
->arch
.irq_pending
);
1421 set_bit(irq
->irq
/ BITS_PER_LONG
, &vcpu
->arch
.irq_summary
);
1428 static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu
*vcpu
)
1431 kvm_inject_nmi(vcpu
);
1437 static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu
*vcpu
,
1438 struct kvm_tpr_access_ctl
*tac
)
1442 vcpu
->arch
.tpr_access_reporting
= !!tac
->enabled
;
1446 long kvm_arch_vcpu_ioctl(struct file
*filp
,
1447 unsigned int ioctl
, unsigned long arg
)
1449 struct kvm_vcpu
*vcpu
= filp
->private_data
;
1450 void __user
*argp
= (void __user
*)arg
;
1452 struct kvm_lapic_state
*lapic
= NULL
;
1455 case KVM_GET_LAPIC
: {
1456 lapic
= kzalloc(sizeof(struct kvm_lapic_state
), GFP_KERNEL
);
1461 r
= kvm_vcpu_ioctl_get_lapic(vcpu
, lapic
);
1465 if (copy_to_user(argp
, lapic
, sizeof(struct kvm_lapic_state
)))
1470 case KVM_SET_LAPIC
: {
1471 lapic
= kmalloc(sizeof(struct kvm_lapic_state
), GFP_KERNEL
);
1476 if (copy_from_user(lapic
, argp
, sizeof(struct kvm_lapic_state
)))
1478 r
= kvm_vcpu_ioctl_set_lapic(vcpu
, lapic
);
1484 case KVM_INTERRUPT
: {
1485 struct kvm_interrupt irq
;
1488 if (copy_from_user(&irq
, argp
, sizeof irq
))
1490 r
= kvm_vcpu_ioctl_interrupt(vcpu
, &irq
);
1497 r
= kvm_vcpu_ioctl_nmi(vcpu
);
1503 case KVM_SET_CPUID
: {
1504 struct kvm_cpuid __user
*cpuid_arg
= argp
;
1505 struct kvm_cpuid cpuid
;
1508 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1510 r
= kvm_vcpu_ioctl_set_cpuid(vcpu
, &cpuid
, cpuid_arg
->entries
);
1515 case KVM_SET_CPUID2
: {
1516 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
1517 struct kvm_cpuid2 cpuid
;
1520 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1522 r
= kvm_vcpu_ioctl_set_cpuid2(vcpu
, &cpuid
,
1523 cpuid_arg
->entries
);
1528 case KVM_GET_CPUID2
: {
1529 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
1530 struct kvm_cpuid2 cpuid
;
1533 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1535 r
= kvm_vcpu_ioctl_get_cpuid2(vcpu
, &cpuid
,
1536 cpuid_arg
->entries
);
1540 if (copy_to_user(cpuid_arg
, &cpuid
, sizeof cpuid
))
1546 r
= msr_io(vcpu
, argp
, kvm_get_msr
, 1);
1549 r
= msr_io(vcpu
, argp
, do_set_msr
, 0);
1551 case KVM_TPR_ACCESS_REPORTING
: {
1552 struct kvm_tpr_access_ctl tac
;
1555 if (copy_from_user(&tac
, argp
, sizeof tac
))
1557 r
= vcpu_ioctl_tpr_access_reporting(vcpu
, &tac
);
1561 if (copy_to_user(argp
, &tac
, sizeof tac
))
1566 case KVM_SET_VAPIC_ADDR
: {
1567 struct kvm_vapic_addr va
;
1570 if (!irqchip_in_kernel(vcpu
->kvm
))
1573 if (copy_from_user(&va
, argp
, sizeof va
))
1576 kvm_lapic_set_vapic_addr(vcpu
, va
.vapic_addr
);
1588 static int kvm_vm_ioctl_set_tss_addr(struct kvm
*kvm
, unsigned long addr
)
1592 if (addr
> (unsigned int)(-3 * PAGE_SIZE
))
1594 ret
= kvm_x86_ops
->set_tss_addr(kvm
, addr
);
1598 static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm
*kvm
,
1599 u32 kvm_nr_mmu_pages
)
1601 if (kvm_nr_mmu_pages
< KVM_MIN_ALLOC_MMU_PAGES
)
1604 down_write(&kvm
->slots_lock
);
1606 kvm_mmu_change_mmu_pages(kvm
, kvm_nr_mmu_pages
);
1607 kvm
->arch
.n_requested_mmu_pages
= kvm_nr_mmu_pages
;
1609 up_write(&kvm
->slots_lock
);
1613 static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm
*kvm
)
1615 return kvm
->arch
.n_alloc_mmu_pages
;
1618 gfn_t
unalias_gfn(struct kvm
*kvm
, gfn_t gfn
)
1621 struct kvm_mem_alias
*alias
;
1623 for (i
= 0; i
< kvm
->arch
.naliases
; ++i
) {
1624 alias
= &kvm
->arch
.aliases
[i
];
1625 if (gfn
>= alias
->base_gfn
1626 && gfn
< alias
->base_gfn
+ alias
->npages
)
1627 return alias
->target_gfn
+ gfn
- alias
->base_gfn
;
1633 * Set a new alias region. Aliases map a portion of physical memory into
1634 * another portion. This is useful for memory windows, for example the PC
1637 static int kvm_vm_ioctl_set_memory_alias(struct kvm
*kvm
,
1638 struct kvm_memory_alias
*alias
)
1641 struct kvm_mem_alias
*p
;
1644 /* General sanity checks */
1645 if (alias
->memory_size
& (PAGE_SIZE
- 1))
1647 if (alias
->guest_phys_addr
& (PAGE_SIZE
- 1))
1649 if (alias
->slot
>= KVM_ALIAS_SLOTS
)
1651 if (alias
->guest_phys_addr
+ alias
->memory_size
1652 < alias
->guest_phys_addr
)
1654 if (alias
->target_phys_addr
+ alias
->memory_size
1655 < alias
->target_phys_addr
)
1658 down_write(&kvm
->slots_lock
);
1659 spin_lock(&kvm
->mmu_lock
);
1661 p
= &kvm
->arch
.aliases
[alias
->slot
];
1662 p
->base_gfn
= alias
->guest_phys_addr
>> PAGE_SHIFT
;
1663 p
->npages
= alias
->memory_size
>> PAGE_SHIFT
;
1664 p
->target_gfn
= alias
->target_phys_addr
>> PAGE_SHIFT
;
1666 for (n
= KVM_ALIAS_SLOTS
; n
> 0; --n
)
1667 if (kvm
->arch
.aliases
[n
- 1].npages
)
1669 kvm
->arch
.naliases
= n
;
1671 spin_unlock(&kvm
->mmu_lock
);
1672 kvm_mmu_zap_all(kvm
);
1674 up_write(&kvm
->slots_lock
);
1682 static int kvm_vm_ioctl_get_irqchip(struct kvm
*kvm
, struct kvm_irqchip
*chip
)
1687 switch (chip
->chip_id
) {
1688 case KVM_IRQCHIP_PIC_MASTER
:
1689 memcpy(&chip
->chip
.pic
,
1690 &pic_irqchip(kvm
)->pics
[0],
1691 sizeof(struct kvm_pic_state
));
1693 case KVM_IRQCHIP_PIC_SLAVE
:
1694 memcpy(&chip
->chip
.pic
,
1695 &pic_irqchip(kvm
)->pics
[1],
1696 sizeof(struct kvm_pic_state
));
1698 case KVM_IRQCHIP_IOAPIC
:
1699 memcpy(&chip
->chip
.ioapic
,
1700 ioapic_irqchip(kvm
),
1701 sizeof(struct kvm_ioapic_state
));
1710 static int kvm_vm_ioctl_set_irqchip(struct kvm
*kvm
, struct kvm_irqchip
*chip
)
1715 switch (chip
->chip_id
) {
1716 case KVM_IRQCHIP_PIC_MASTER
:
1717 memcpy(&pic_irqchip(kvm
)->pics
[0],
1719 sizeof(struct kvm_pic_state
));
1721 case KVM_IRQCHIP_PIC_SLAVE
:
1722 memcpy(&pic_irqchip(kvm
)->pics
[1],
1724 sizeof(struct kvm_pic_state
));
1726 case KVM_IRQCHIP_IOAPIC
:
1727 memcpy(ioapic_irqchip(kvm
),
1729 sizeof(struct kvm_ioapic_state
));
1735 kvm_pic_update_irq(pic_irqchip(kvm
));
1739 static int kvm_vm_ioctl_get_pit(struct kvm
*kvm
, struct kvm_pit_state
*ps
)
1743 memcpy(ps
, &kvm
->arch
.vpit
->pit_state
, sizeof(struct kvm_pit_state
));
1747 static int kvm_vm_ioctl_set_pit(struct kvm
*kvm
, struct kvm_pit_state
*ps
)
1751 memcpy(&kvm
->arch
.vpit
->pit_state
, ps
, sizeof(struct kvm_pit_state
));
1752 kvm_pit_load_count(kvm
, 0, ps
->channels
[0].count
);
1756 static int kvm_vm_ioctl_reinject(struct kvm
*kvm
,
1757 struct kvm_reinject_control
*control
)
1759 if (!kvm
->arch
.vpit
)
1761 kvm
->arch
.vpit
->pit_state
.pit_timer
.reinject
= control
->pit_reinject
;
1766 * Get (and clear) the dirty memory log for a memory slot.
1768 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
,
1769 struct kvm_dirty_log
*log
)
1773 struct kvm_memory_slot
*memslot
;
1776 down_write(&kvm
->slots_lock
);
1778 r
= kvm_get_dirty_log(kvm
, log
, &is_dirty
);
1782 /* If nothing is dirty, don't bother messing with page tables. */
1784 kvm_mmu_slot_remove_write_access(kvm
, log
->slot
);
1785 kvm_flush_remote_tlbs(kvm
);
1786 memslot
= &kvm
->memslots
[log
->slot
];
1787 n
= ALIGN(memslot
->npages
, BITS_PER_LONG
) / 8;
1788 memset(memslot
->dirty_bitmap
, 0, n
);
1792 up_write(&kvm
->slots_lock
);
1796 long kvm_arch_vm_ioctl(struct file
*filp
,
1797 unsigned int ioctl
, unsigned long arg
)
1799 struct kvm
*kvm
= filp
->private_data
;
1800 void __user
*argp
= (void __user
*)arg
;
1803 * This union makes it completely explicit to gcc-3.x
1804 * that these two variables' stack usage should be
1805 * combined, not added together.
1808 struct kvm_pit_state ps
;
1809 struct kvm_memory_alias alias
;
1813 case KVM_SET_TSS_ADDR
:
1814 r
= kvm_vm_ioctl_set_tss_addr(kvm
, arg
);
1818 case KVM_SET_MEMORY_REGION
: {
1819 struct kvm_memory_region kvm_mem
;
1820 struct kvm_userspace_memory_region kvm_userspace_mem
;
1823 if (copy_from_user(&kvm_mem
, argp
, sizeof kvm_mem
))
1825 kvm_userspace_mem
.slot
= kvm_mem
.slot
;
1826 kvm_userspace_mem
.flags
= kvm_mem
.flags
;
1827 kvm_userspace_mem
.guest_phys_addr
= kvm_mem
.guest_phys_addr
;
1828 kvm_userspace_mem
.memory_size
= kvm_mem
.memory_size
;
1829 r
= kvm_vm_ioctl_set_memory_region(kvm
, &kvm_userspace_mem
, 0);
1834 case KVM_SET_NR_MMU_PAGES
:
1835 r
= kvm_vm_ioctl_set_nr_mmu_pages(kvm
, arg
);
1839 case KVM_GET_NR_MMU_PAGES
:
1840 r
= kvm_vm_ioctl_get_nr_mmu_pages(kvm
);
1842 case KVM_SET_MEMORY_ALIAS
:
1844 if (copy_from_user(&u
.alias
, argp
, sizeof(struct kvm_memory_alias
)))
1846 r
= kvm_vm_ioctl_set_memory_alias(kvm
, &u
.alias
);
1850 case KVM_CREATE_IRQCHIP
:
1852 kvm
->arch
.vpic
= kvm_create_pic(kvm
);
1853 if (kvm
->arch
.vpic
) {
1854 r
= kvm_ioapic_init(kvm
);
1856 kfree(kvm
->arch
.vpic
);
1857 kvm
->arch
.vpic
= NULL
;
1862 r
= kvm_setup_default_irq_routing(kvm
);
1864 kfree(kvm
->arch
.vpic
);
1865 kfree(kvm
->arch
.vioapic
);
1869 case KVM_CREATE_PIT
:
1870 mutex_lock(&kvm
->lock
);
1873 goto create_pit_unlock
;
1875 kvm
->arch
.vpit
= kvm_create_pit(kvm
);
1879 mutex_unlock(&kvm
->lock
);
1881 case KVM_IRQ_LINE_STATUS
:
1882 case KVM_IRQ_LINE
: {
1883 struct kvm_irq_level irq_event
;
1886 if (copy_from_user(&irq_event
, argp
, sizeof irq_event
))
1888 if (irqchip_in_kernel(kvm
)) {
1890 mutex_lock(&kvm
->lock
);
1891 status
= kvm_set_irq(kvm
, KVM_USERSPACE_IRQ_SOURCE_ID
,
1892 irq_event
.irq
, irq_event
.level
);
1893 mutex_unlock(&kvm
->lock
);
1894 if (ioctl
== KVM_IRQ_LINE_STATUS
) {
1895 irq_event
.status
= status
;
1896 if (copy_to_user(argp
, &irq_event
,
1904 case KVM_GET_IRQCHIP
: {
1905 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1906 struct kvm_irqchip
*chip
= kmalloc(sizeof(*chip
), GFP_KERNEL
);
1912 if (copy_from_user(chip
, argp
, sizeof *chip
))
1913 goto get_irqchip_out
;
1915 if (!irqchip_in_kernel(kvm
))
1916 goto get_irqchip_out
;
1917 r
= kvm_vm_ioctl_get_irqchip(kvm
, chip
);
1919 goto get_irqchip_out
;
1921 if (copy_to_user(argp
, chip
, sizeof *chip
))
1922 goto get_irqchip_out
;
1930 case KVM_SET_IRQCHIP
: {
1931 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1932 struct kvm_irqchip
*chip
= kmalloc(sizeof(*chip
), GFP_KERNEL
);
1938 if (copy_from_user(chip
, argp
, sizeof *chip
))
1939 goto set_irqchip_out
;
1941 if (!irqchip_in_kernel(kvm
))
1942 goto set_irqchip_out
;
1943 r
= kvm_vm_ioctl_set_irqchip(kvm
, chip
);
1945 goto set_irqchip_out
;
1955 if (copy_from_user(&u
.ps
, argp
, sizeof(struct kvm_pit_state
)))
1958 if (!kvm
->arch
.vpit
)
1960 r
= kvm_vm_ioctl_get_pit(kvm
, &u
.ps
);
1964 if (copy_to_user(argp
, &u
.ps
, sizeof(struct kvm_pit_state
)))
1971 if (copy_from_user(&u
.ps
, argp
, sizeof u
.ps
))
1974 if (!kvm
->arch
.vpit
)
1976 r
= kvm_vm_ioctl_set_pit(kvm
, &u
.ps
);
1982 case KVM_REINJECT_CONTROL
: {
1983 struct kvm_reinject_control control
;
1985 if (copy_from_user(&control
, argp
, sizeof(control
)))
1987 r
= kvm_vm_ioctl_reinject(kvm
, &control
);
2000 static void kvm_init_msr_list(void)
2005 for (i
= j
= 0; i
< ARRAY_SIZE(msrs_to_save
); i
++) {
2006 if (rdmsr_safe(msrs_to_save
[i
], &dummy
[0], &dummy
[1]) < 0)
2009 msrs_to_save
[j
] = msrs_to_save
[i
];
2012 num_msrs_to_save
= j
;
2016 * Only apic need an MMIO device hook, so shortcut now..
2018 static struct kvm_io_device
*vcpu_find_pervcpu_dev(struct kvm_vcpu
*vcpu
,
2019 gpa_t addr
, int len
,
2022 struct kvm_io_device
*dev
;
2024 if (vcpu
->arch
.apic
) {
2025 dev
= &vcpu
->arch
.apic
->dev
;
2026 if (dev
->in_range(dev
, addr
, len
, is_write
))
2033 static struct kvm_io_device
*vcpu_find_mmio_dev(struct kvm_vcpu
*vcpu
,
2034 gpa_t addr
, int len
,
2037 struct kvm_io_device
*dev
;
2039 dev
= vcpu_find_pervcpu_dev(vcpu
, addr
, len
, is_write
);
2041 dev
= kvm_io_bus_find_dev(&vcpu
->kvm
->mmio_bus
, addr
, len
,
2046 int kvm_read_guest_virt(gva_t addr
, void *val
, unsigned int bytes
,
2047 struct kvm_vcpu
*vcpu
)
2050 int r
= X86EMUL_CONTINUE
;
2053 gpa_t gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
2054 unsigned offset
= addr
& (PAGE_SIZE
-1);
2055 unsigned toread
= min(bytes
, (unsigned)PAGE_SIZE
- offset
);
2058 if (gpa
== UNMAPPED_GVA
) {
2059 r
= X86EMUL_PROPAGATE_FAULT
;
2062 ret
= kvm_read_guest(vcpu
->kvm
, gpa
, data
, toread
);
2064 r
= X86EMUL_UNHANDLEABLE
;
2076 int kvm_write_guest_virt(gva_t addr
, void *val
, unsigned int bytes
,
2077 struct kvm_vcpu
*vcpu
)
2080 int r
= X86EMUL_CONTINUE
;
2083 gpa_t gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
2084 unsigned offset
= addr
& (PAGE_SIZE
-1);
2085 unsigned towrite
= min(bytes
, (unsigned)PAGE_SIZE
- offset
);
2088 if (gpa
== UNMAPPED_GVA
) {
2089 r
= X86EMUL_PROPAGATE_FAULT
;
2092 ret
= kvm_write_guest(vcpu
->kvm
, gpa
, data
, towrite
);
2094 r
= X86EMUL_UNHANDLEABLE
;
2107 static int emulator_read_emulated(unsigned long addr
,
2110 struct kvm_vcpu
*vcpu
)
2112 struct kvm_io_device
*mmio_dev
;
2115 if (vcpu
->mmio_read_completed
) {
2116 memcpy(val
, vcpu
->mmio_data
, bytes
);
2117 vcpu
->mmio_read_completed
= 0;
2118 return X86EMUL_CONTINUE
;
2121 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
2123 /* For APIC access vmexit */
2124 if ((gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
2127 if (kvm_read_guest_virt(addr
, val
, bytes
, vcpu
)
2128 == X86EMUL_CONTINUE
)
2129 return X86EMUL_CONTINUE
;
2130 if (gpa
== UNMAPPED_GVA
)
2131 return X86EMUL_PROPAGATE_FAULT
;
2135 * Is this MMIO handled locally?
2137 mutex_lock(&vcpu
->kvm
->lock
);
2138 mmio_dev
= vcpu_find_mmio_dev(vcpu
, gpa
, bytes
, 0);
2140 kvm_iodevice_read(mmio_dev
, gpa
, bytes
, val
);
2141 mutex_unlock(&vcpu
->kvm
->lock
);
2142 return X86EMUL_CONTINUE
;
2144 mutex_unlock(&vcpu
->kvm
->lock
);
2146 vcpu
->mmio_needed
= 1;
2147 vcpu
->mmio_phys_addr
= gpa
;
2148 vcpu
->mmio_size
= bytes
;
2149 vcpu
->mmio_is_write
= 0;
2151 return X86EMUL_UNHANDLEABLE
;
2154 int emulator_write_phys(struct kvm_vcpu
*vcpu
, gpa_t gpa
,
2155 const void *val
, int bytes
)
2159 ret
= kvm_write_guest(vcpu
->kvm
, gpa
, val
, bytes
);
2162 kvm_mmu_pte_write(vcpu
, gpa
, val
, bytes
, 1);
2166 static int emulator_write_emulated_onepage(unsigned long addr
,
2169 struct kvm_vcpu
*vcpu
)
2171 struct kvm_io_device
*mmio_dev
;
2174 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
2176 if (gpa
== UNMAPPED_GVA
) {
2177 kvm_inject_page_fault(vcpu
, addr
, 2);
2178 return X86EMUL_PROPAGATE_FAULT
;
2181 /* For APIC access vmexit */
2182 if ((gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
2185 if (emulator_write_phys(vcpu
, gpa
, val
, bytes
))
2186 return X86EMUL_CONTINUE
;
2190 * Is this MMIO handled locally?
2192 mutex_lock(&vcpu
->kvm
->lock
);
2193 mmio_dev
= vcpu_find_mmio_dev(vcpu
, gpa
, bytes
, 1);
2195 kvm_iodevice_write(mmio_dev
, gpa
, bytes
, val
);
2196 mutex_unlock(&vcpu
->kvm
->lock
);
2197 return X86EMUL_CONTINUE
;
2199 mutex_unlock(&vcpu
->kvm
->lock
);
2201 vcpu
->mmio_needed
= 1;
2202 vcpu
->mmio_phys_addr
= gpa
;
2203 vcpu
->mmio_size
= bytes
;
2204 vcpu
->mmio_is_write
= 1;
2205 memcpy(vcpu
->mmio_data
, val
, bytes
);
2207 return X86EMUL_CONTINUE
;
2210 int emulator_write_emulated(unsigned long addr
,
2213 struct kvm_vcpu
*vcpu
)
2215 /* Crossing a page boundary? */
2216 if (((addr
+ bytes
- 1) ^ addr
) & PAGE_MASK
) {
2219 now
= -addr
& ~PAGE_MASK
;
2220 rc
= emulator_write_emulated_onepage(addr
, val
, now
, vcpu
);
2221 if (rc
!= X86EMUL_CONTINUE
)
2227 return emulator_write_emulated_onepage(addr
, val
, bytes
, vcpu
);
2229 EXPORT_SYMBOL_GPL(emulator_write_emulated
);
2231 static int emulator_cmpxchg_emulated(unsigned long addr
,
2235 struct kvm_vcpu
*vcpu
)
2237 static int reported
;
2241 printk(KERN_WARNING
"kvm: emulating exchange as write\n");
2243 #ifndef CONFIG_X86_64
2244 /* guests cmpxchg8b have to be emulated atomically */
2251 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
2253 if (gpa
== UNMAPPED_GVA
||
2254 (gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
2257 if (((gpa
+ bytes
- 1) & PAGE_MASK
) != (gpa
& PAGE_MASK
))
2262 page
= gfn_to_page(vcpu
->kvm
, gpa
>> PAGE_SHIFT
);
2264 kaddr
= kmap_atomic(page
, KM_USER0
);
2265 set_64bit((u64
*)(kaddr
+ offset_in_page(gpa
)), val
);
2266 kunmap_atomic(kaddr
, KM_USER0
);
2267 kvm_release_page_dirty(page
);
2272 return emulator_write_emulated(addr
, new, bytes
, vcpu
);
2275 static unsigned long get_segment_base(struct kvm_vcpu
*vcpu
, int seg
)
2277 return kvm_x86_ops
->get_segment_base(vcpu
, seg
);
2280 int emulate_invlpg(struct kvm_vcpu
*vcpu
, gva_t address
)
2282 kvm_mmu_invlpg(vcpu
, address
);
2283 return X86EMUL_CONTINUE
;
2286 int emulate_clts(struct kvm_vcpu
*vcpu
)
2288 KVMTRACE_0D(CLTS
, vcpu
, handler
);
2289 kvm_x86_ops
->set_cr0(vcpu
, vcpu
->arch
.cr0
& ~X86_CR0_TS
);
2290 return X86EMUL_CONTINUE
;
2293 int emulator_get_dr(struct x86_emulate_ctxt
*ctxt
, int dr
, unsigned long *dest
)
2295 struct kvm_vcpu
*vcpu
= ctxt
->vcpu
;
2299 *dest
= kvm_x86_ops
->get_dr(vcpu
, dr
);
2300 return X86EMUL_CONTINUE
;
2302 pr_unimpl(vcpu
, "%s: unexpected dr %u\n", __func__
, dr
);
2303 return X86EMUL_UNHANDLEABLE
;
2307 int emulator_set_dr(struct x86_emulate_ctxt
*ctxt
, int dr
, unsigned long value
)
2309 unsigned long mask
= (ctxt
->mode
== X86EMUL_MODE_PROT64
) ? ~0ULL : ~0U;
2312 kvm_x86_ops
->set_dr(ctxt
->vcpu
, dr
, value
& mask
, &exception
);
2314 /* FIXME: better handling */
2315 return X86EMUL_UNHANDLEABLE
;
2317 return X86EMUL_CONTINUE
;
2320 void kvm_report_emulation_failure(struct kvm_vcpu
*vcpu
, const char *context
)
2323 unsigned long rip
= kvm_rip_read(vcpu
);
2324 unsigned long rip_linear
;
2326 if (!printk_ratelimit())
2329 rip_linear
= rip
+ get_segment_base(vcpu
, VCPU_SREG_CS
);
2331 kvm_read_guest_virt(rip_linear
, (void *)opcodes
, 4, vcpu
);
2333 printk(KERN_ERR
"emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
2334 context
, rip
, opcodes
[0], opcodes
[1], opcodes
[2], opcodes
[3]);
2336 EXPORT_SYMBOL_GPL(kvm_report_emulation_failure
);
2338 static struct x86_emulate_ops emulate_ops
= {
2339 .read_std
= kvm_read_guest_virt
,
2340 .read_emulated
= emulator_read_emulated
,
2341 .write_emulated
= emulator_write_emulated
,
2342 .cmpxchg_emulated
= emulator_cmpxchg_emulated
,
2345 static void cache_all_regs(struct kvm_vcpu
*vcpu
)
2347 kvm_register_read(vcpu
, VCPU_REGS_RAX
);
2348 kvm_register_read(vcpu
, VCPU_REGS_RSP
);
2349 kvm_register_read(vcpu
, VCPU_REGS_RIP
);
2350 vcpu
->arch
.regs_dirty
= ~0;
2353 int emulate_instruction(struct kvm_vcpu
*vcpu
,
2354 struct kvm_run
*run
,
2360 struct decode_cache
*c
;
2362 kvm_clear_exception_queue(vcpu
);
2363 vcpu
->arch
.mmio_fault_cr2
= cr2
;
2365 * TODO: fix x86_emulate.c to use guest_read/write_register
2366 * instead of direct ->regs accesses, can save hundred cycles
2367 * on Intel for instructions that don't read/change RSP, for
2370 cache_all_regs(vcpu
);
2372 vcpu
->mmio_is_write
= 0;
2373 vcpu
->arch
.pio
.string
= 0;
2375 if (!(emulation_type
& EMULTYPE_NO_DECODE
)) {
2377 kvm_x86_ops
->get_cs_db_l_bits(vcpu
, &cs_db
, &cs_l
);
2379 vcpu
->arch
.emulate_ctxt
.vcpu
= vcpu
;
2380 vcpu
->arch
.emulate_ctxt
.eflags
= kvm_x86_ops
->get_rflags(vcpu
);
2381 vcpu
->arch
.emulate_ctxt
.mode
=
2382 (vcpu
->arch
.emulate_ctxt
.eflags
& X86_EFLAGS_VM
)
2383 ? X86EMUL_MODE_REAL
: cs_l
2384 ? X86EMUL_MODE_PROT64
: cs_db
2385 ? X86EMUL_MODE_PROT32
: X86EMUL_MODE_PROT16
;
2387 r
= x86_decode_insn(&vcpu
->arch
.emulate_ctxt
, &emulate_ops
);
2389 /* Reject the instructions other than VMCALL/VMMCALL when
2390 * try to emulate invalid opcode */
2391 c
= &vcpu
->arch
.emulate_ctxt
.decode
;
2392 if ((emulation_type
& EMULTYPE_TRAP_UD
) &&
2393 (!(c
->twobyte
&& c
->b
== 0x01 &&
2394 (c
->modrm_reg
== 0 || c
->modrm_reg
== 3) &&
2395 c
->modrm_mod
== 3 && c
->modrm_rm
== 1)))
2396 return EMULATE_FAIL
;
2398 ++vcpu
->stat
.insn_emulation
;
2400 ++vcpu
->stat
.insn_emulation_fail
;
2401 if (kvm_mmu_unprotect_page_virt(vcpu
, cr2
))
2402 return EMULATE_DONE
;
2403 return EMULATE_FAIL
;
2407 r
= x86_emulate_insn(&vcpu
->arch
.emulate_ctxt
, &emulate_ops
);
2409 if (vcpu
->arch
.pio
.string
)
2410 return EMULATE_DO_MMIO
;
2412 if ((r
|| vcpu
->mmio_is_write
) && run
) {
2413 run
->exit_reason
= KVM_EXIT_MMIO
;
2414 run
->mmio
.phys_addr
= vcpu
->mmio_phys_addr
;
2415 memcpy(run
->mmio
.data
, vcpu
->mmio_data
, 8);
2416 run
->mmio
.len
= vcpu
->mmio_size
;
2417 run
->mmio
.is_write
= vcpu
->mmio_is_write
;
2421 if (kvm_mmu_unprotect_page_virt(vcpu
, cr2
))
2422 return EMULATE_DONE
;
2423 if (!vcpu
->mmio_needed
) {
2424 kvm_report_emulation_failure(vcpu
, "mmio");
2425 return EMULATE_FAIL
;
2427 return EMULATE_DO_MMIO
;
2430 kvm_x86_ops
->set_rflags(vcpu
, vcpu
->arch
.emulate_ctxt
.eflags
);
2432 if (vcpu
->mmio_is_write
) {
2433 vcpu
->mmio_needed
= 0;
2434 return EMULATE_DO_MMIO
;
2437 return EMULATE_DONE
;
2439 EXPORT_SYMBOL_GPL(emulate_instruction
);
2441 static int pio_copy_data(struct kvm_vcpu
*vcpu
)
2443 void *p
= vcpu
->arch
.pio_data
;
2444 gva_t q
= vcpu
->arch
.pio
.guest_gva
;
2448 bytes
= vcpu
->arch
.pio
.size
* vcpu
->arch
.pio
.cur_count
;
2449 if (vcpu
->arch
.pio
.in
)
2450 ret
= kvm_write_guest_virt(q
, p
, bytes
, vcpu
);
2452 ret
= kvm_read_guest_virt(q
, p
, bytes
, vcpu
);
2456 int complete_pio(struct kvm_vcpu
*vcpu
)
2458 struct kvm_pio_request
*io
= &vcpu
->arch
.pio
;
2465 val
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
2466 memcpy(&val
, vcpu
->arch
.pio_data
, io
->size
);
2467 kvm_register_write(vcpu
, VCPU_REGS_RAX
, val
);
2471 r
= pio_copy_data(vcpu
);
2478 delta
*= io
->cur_count
;
2480 * The size of the register should really depend on
2481 * current address size.
2483 val
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
2485 kvm_register_write(vcpu
, VCPU_REGS_RCX
, val
);
2491 val
= kvm_register_read(vcpu
, VCPU_REGS_RDI
);
2493 kvm_register_write(vcpu
, VCPU_REGS_RDI
, val
);
2495 val
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
2497 kvm_register_write(vcpu
, VCPU_REGS_RSI
, val
);
2501 io
->count
-= io
->cur_count
;
2507 static void kernel_pio(struct kvm_io_device
*pio_dev
,
2508 struct kvm_vcpu
*vcpu
,
2511 /* TODO: String I/O for in kernel device */
2513 mutex_lock(&vcpu
->kvm
->lock
);
2514 if (vcpu
->arch
.pio
.in
)
2515 kvm_iodevice_read(pio_dev
, vcpu
->arch
.pio
.port
,
2516 vcpu
->arch
.pio
.size
,
2519 kvm_iodevice_write(pio_dev
, vcpu
->arch
.pio
.port
,
2520 vcpu
->arch
.pio
.size
,
2522 mutex_unlock(&vcpu
->kvm
->lock
);
2525 static void pio_string_write(struct kvm_io_device
*pio_dev
,
2526 struct kvm_vcpu
*vcpu
)
2528 struct kvm_pio_request
*io
= &vcpu
->arch
.pio
;
2529 void *pd
= vcpu
->arch
.pio_data
;
2532 mutex_lock(&vcpu
->kvm
->lock
);
2533 for (i
= 0; i
< io
->cur_count
; i
++) {
2534 kvm_iodevice_write(pio_dev
, io
->port
,
2539 mutex_unlock(&vcpu
->kvm
->lock
);
2542 static struct kvm_io_device
*vcpu_find_pio_dev(struct kvm_vcpu
*vcpu
,
2543 gpa_t addr
, int len
,
2546 return kvm_io_bus_find_dev(&vcpu
->kvm
->pio_bus
, addr
, len
, is_write
);
2549 int kvm_emulate_pio(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
, int in
,
2550 int size
, unsigned port
)
2552 struct kvm_io_device
*pio_dev
;
2555 vcpu
->run
->exit_reason
= KVM_EXIT_IO
;
2556 vcpu
->run
->io
.direction
= in
? KVM_EXIT_IO_IN
: KVM_EXIT_IO_OUT
;
2557 vcpu
->run
->io
.size
= vcpu
->arch
.pio
.size
= size
;
2558 vcpu
->run
->io
.data_offset
= KVM_PIO_PAGE_OFFSET
* PAGE_SIZE
;
2559 vcpu
->run
->io
.count
= vcpu
->arch
.pio
.count
= vcpu
->arch
.pio
.cur_count
= 1;
2560 vcpu
->run
->io
.port
= vcpu
->arch
.pio
.port
= port
;
2561 vcpu
->arch
.pio
.in
= in
;
2562 vcpu
->arch
.pio
.string
= 0;
2563 vcpu
->arch
.pio
.down
= 0;
2564 vcpu
->arch
.pio
.rep
= 0;
2566 if (vcpu
->run
->io
.direction
== KVM_EXIT_IO_IN
)
2567 KVMTRACE_2D(IO_READ
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2570 KVMTRACE_2D(IO_WRITE
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2573 val
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
2574 memcpy(vcpu
->arch
.pio_data
, &val
, 4);
2576 pio_dev
= vcpu_find_pio_dev(vcpu
, port
, size
, !in
);
2578 kernel_pio(pio_dev
, vcpu
, vcpu
->arch
.pio_data
);
2584 EXPORT_SYMBOL_GPL(kvm_emulate_pio
);
2586 int kvm_emulate_pio_string(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
, int in
,
2587 int size
, unsigned long count
, int down
,
2588 gva_t address
, int rep
, unsigned port
)
2590 unsigned now
, in_page
;
2592 struct kvm_io_device
*pio_dev
;
2594 vcpu
->run
->exit_reason
= KVM_EXIT_IO
;
2595 vcpu
->run
->io
.direction
= in
? KVM_EXIT_IO_IN
: KVM_EXIT_IO_OUT
;
2596 vcpu
->run
->io
.size
= vcpu
->arch
.pio
.size
= size
;
2597 vcpu
->run
->io
.data_offset
= KVM_PIO_PAGE_OFFSET
* PAGE_SIZE
;
2598 vcpu
->run
->io
.count
= vcpu
->arch
.pio
.count
= vcpu
->arch
.pio
.cur_count
= count
;
2599 vcpu
->run
->io
.port
= vcpu
->arch
.pio
.port
= port
;
2600 vcpu
->arch
.pio
.in
= in
;
2601 vcpu
->arch
.pio
.string
= 1;
2602 vcpu
->arch
.pio
.down
= down
;
2603 vcpu
->arch
.pio
.rep
= rep
;
2605 if (vcpu
->run
->io
.direction
== KVM_EXIT_IO_IN
)
2606 KVMTRACE_2D(IO_READ
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2609 KVMTRACE_2D(IO_WRITE
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2613 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
2618 in_page
= PAGE_SIZE
- offset_in_page(address
);
2620 in_page
= offset_in_page(address
) + size
;
2621 now
= min(count
, (unsigned long)in_page
/ size
);
2626 * String I/O in reverse. Yuck. Kill the guest, fix later.
2628 pr_unimpl(vcpu
, "guest string pio down\n");
2629 kvm_inject_gp(vcpu
, 0);
2632 vcpu
->run
->io
.count
= now
;
2633 vcpu
->arch
.pio
.cur_count
= now
;
2635 if (vcpu
->arch
.pio
.cur_count
== vcpu
->arch
.pio
.count
)
2636 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
2638 vcpu
->arch
.pio
.guest_gva
= address
;
2640 pio_dev
= vcpu_find_pio_dev(vcpu
, port
,
2641 vcpu
->arch
.pio
.cur_count
,
2642 !vcpu
->arch
.pio
.in
);
2643 if (!vcpu
->arch
.pio
.in
) {
2644 /* string PIO write */
2645 ret
= pio_copy_data(vcpu
);
2646 if (ret
== X86EMUL_PROPAGATE_FAULT
) {
2647 kvm_inject_gp(vcpu
, 0);
2650 if (ret
== 0 && pio_dev
) {
2651 pio_string_write(pio_dev
, vcpu
);
2653 if (vcpu
->arch
.pio
.count
== 0)
2657 pr_unimpl(vcpu
, "no string pio read support yet, "
2658 "port %x size %d count %ld\n",
2663 EXPORT_SYMBOL_GPL(kvm_emulate_pio_string
);
2665 static void bounce_off(void *info
)
2670 static unsigned int ref_freq
;
2671 static unsigned long tsc_khz_ref
;
2673 static int kvmclock_cpufreq_notifier(struct notifier_block
*nb
, unsigned long val
,
2676 struct cpufreq_freqs
*freq
= data
;
2678 struct kvm_vcpu
*vcpu
;
2679 int i
, send_ipi
= 0;
2682 ref_freq
= freq
->old
;
2684 if (val
== CPUFREQ_PRECHANGE
&& freq
->old
> freq
->new)
2686 if (val
== CPUFREQ_POSTCHANGE
&& freq
->old
< freq
->new)
2688 per_cpu(cpu_tsc_khz
, freq
->cpu
) = cpufreq_scale(tsc_khz_ref
, ref_freq
, freq
->new);
2690 spin_lock(&kvm_lock
);
2691 list_for_each_entry(kvm
, &vm_list
, vm_list
) {
2692 for (i
= 0; i
< KVM_MAX_VCPUS
; ++i
) {
2693 vcpu
= kvm
->vcpus
[i
];
2696 if (vcpu
->cpu
!= freq
->cpu
)
2698 if (!kvm_request_guest_time_update(vcpu
))
2700 if (vcpu
->cpu
!= smp_processor_id())
2704 spin_unlock(&kvm_lock
);
2706 if (freq
->old
< freq
->new && send_ipi
) {
2708 * We upscale the frequency. Must make the guest
2709 * doesn't see old kvmclock values while running with
2710 * the new frequency, otherwise we risk the guest sees
2711 * time go backwards.
2713 * In case we update the frequency for another cpu
2714 * (which might be in guest context) send an interrupt
2715 * to kick the cpu out of guest context. Next time
2716 * guest context is entered kvmclock will be updated,
2717 * so the guest will not see stale values.
2719 smp_call_function_single(freq
->cpu
, bounce_off
, NULL
, 1);
2724 static struct notifier_block kvmclock_cpufreq_notifier_block
= {
2725 .notifier_call
= kvmclock_cpufreq_notifier
2728 int kvm_arch_init(void *opaque
)
2731 struct kvm_x86_ops
*ops
= (struct kvm_x86_ops
*)opaque
;
2734 printk(KERN_ERR
"kvm: already loaded the other module\n");
2739 if (!ops
->cpu_has_kvm_support()) {
2740 printk(KERN_ERR
"kvm: no hardware support\n");
2744 if (ops
->disabled_by_bios()) {
2745 printk(KERN_ERR
"kvm: disabled by bios\n");
2750 r
= kvm_mmu_module_init();
2754 kvm_init_msr_list();
2757 kvm_mmu_set_nonpresent_ptes(0ull, 0ull);
2758 kvm_mmu_set_base_ptes(PT_PRESENT_MASK
);
2759 kvm_mmu_set_mask_ptes(PT_USER_MASK
, PT_ACCESSED_MASK
,
2760 PT_DIRTY_MASK
, PT64_NX_MASK
, 0, 0);
2762 for_each_possible_cpu(cpu
)
2763 per_cpu(cpu_tsc_khz
, cpu
) = tsc_khz
;
2764 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC
)) {
2765 tsc_khz_ref
= tsc_khz
;
2766 cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block
,
2767 CPUFREQ_TRANSITION_NOTIFIER
);
2776 void kvm_arch_exit(void)
2779 kvm_mmu_module_exit();
2782 int kvm_emulate_halt(struct kvm_vcpu
*vcpu
)
2784 ++vcpu
->stat
.halt_exits
;
2785 KVMTRACE_0D(HLT
, vcpu
, handler
);
2786 if (irqchip_in_kernel(vcpu
->kvm
)) {
2787 vcpu
->arch
.mp_state
= KVM_MP_STATE_HALTED
;
2790 vcpu
->run
->exit_reason
= KVM_EXIT_HLT
;
2794 EXPORT_SYMBOL_GPL(kvm_emulate_halt
);
2796 static inline gpa_t
hc_gpa(struct kvm_vcpu
*vcpu
, unsigned long a0
,
2799 if (is_long_mode(vcpu
))
2802 return a0
| ((gpa_t
)a1
<< 32);
2805 int kvm_emulate_hypercall(struct kvm_vcpu
*vcpu
)
2807 unsigned long nr
, a0
, a1
, a2
, a3
, ret
;
2810 nr
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
2811 a0
= kvm_register_read(vcpu
, VCPU_REGS_RBX
);
2812 a1
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
2813 a2
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
2814 a3
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
2816 KVMTRACE_1D(VMMCALL
, vcpu
, (u32
)nr
, handler
);
2818 if (!is_long_mode(vcpu
)) {
2827 case KVM_HC_VAPIC_POLL_IRQ
:
2831 r
= kvm_pv_mmu_op(vcpu
, a0
, hc_gpa(vcpu
, a1
, a2
), &ret
);
2837 kvm_register_write(vcpu
, VCPU_REGS_RAX
, ret
);
2838 ++vcpu
->stat
.hypercalls
;
2841 EXPORT_SYMBOL_GPL(kvm_emulate_hypercall
);
2843 int kvm_fix_hypercall(struct kvm_vcpu
*vcpu
)
2845 char instruction
[3];
2847 unsigned long rip
= kvm_rip_read(vcpu
);
2851 * Blow out the MMU to ensure that no other VCPU has an active mapping
2852 * to ensure that the updated hypercall appears atomically across all
2855 kvm_mmu_zap_all(vcpu
->kvm
);
2857 kvm_x86_ops
->patch_hypercall(vcpu
, instruction
);
2858 if (emulator_write_emulated(rip
, instruction
, 3, vcpu
)
2859 != X86EMUL_CONTINUE
)
2865 static u64
mk_cr_64(u64 curr_cr
, u32 new_val
)
2867 return (curr_cr
& ~((1ULL << 32) - 1)) | new_val
;
2870 void realmode_lgdt(struct kvm_vcpu
*vcpu
, u16 limit
, unsigned long base
)
2872 struct descriptor_table dt
= { limit
, base
};
2874 kvm_x86_ops
->set_gdt(vcpu
, &dt
);
2877 void realmode_lidt(struct kvm_vcpu
*vcpu
, u16 limit
, unsigned long base
)
2879 struct descriptor_table dt
= { limit
, base
};
2881 kvm_x86_ops
->set_idt(vcpu
, &dt
);
2884 void realmode_lmsw(struct kvm_vcpu
*vcpu
, unsigned long msw
,
2885 unsigned long *rflags
)
2887 kvm_lmsw(vcpu
, msw
);
2888 *rflags
= kvm_x86_ops
->get_rflags(vcpu
);
2891 unsigned long realmode_get_cr(struct kvm_vcpu
*vcpu
, int cr
)
2893 unsigned long value
;
2895 kvm_x86_ops
->decache_cr4_guest_bits(vcpu
);
2898 value
= vcpu
->arch
.cr0
;
2901 value
= vcpu
->arch
.cr2
;
2904 value
= vcpu
->arch
.cr3
;
2907 value
= vcpu
->arch
.cr4
;
2910 value
= kvm_get_cr8(vcpu
);
2913 vcpu_printf(vcpu
, "%s: unexpected cr %u\n", __func__
, cr
);
2916 KVMTRACE_3D(CR_READ
, vcpu
, (u32
)cr
, (u32
)value
,
2917 (u32
)((u64
)value
>> 32), handler
);
2922 void realmode_set_cr(struct kvm_vcpu
*vcpu
, int cr
, unsigned long val
,
2923 unsigned long *rflags
)
2925 KVMTRACE_3D(CR_WRITE
, vcpu
, (u32
)cr
, (u32
)val
,
2926 (u32
)((u64
)val
>> 32), handler
);
2930 kvm_set_cr0(vcpu
, mk_cr_64(vcpu
->arch
.cr0
, val
));
2931 *rflags
= kvm_x86_ops
->get_rflags(vcpu
);
2934 vcpu
->arch
.cr2
= val
;
2937 kvm_set_cr3(vcpu
, val
);
2940 kvm_set_cr4(vcpu
, mk_cr_64(vcpu
->arch
.cr4
, val
));
2943 kvm_set_cr8(vcpu
, val
& 0xfUL
);
2946 vcpu_printf(vcpu
, "%s: unexpected cr %u\n", __func__
, cr
);
2950 static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu
*vcpu
, int i
)
2952 struct kvm_cpuid_entry2
*e
= &vcpu
->arch
.cpuid_entries
[i
];
2953 int j
, nent
= vcpu
->arch
.cpuid_nent
;
2955 e
->flags
&= ~KVM_CPUID_FLAG_STATE_READ_NEXT
;
2956 /* when no next entry is found, the current entry[i] is reselected */
2957 for (j
= i
+ 1; ; j
= (j
+ 1) % nent
) {
2958 struct kvm_cpuid_entry2
*ej
= &vcpu
->arch
.cpuid_entries
[j
];
2959 if (ej
->function
== e
->function
) {
2960 ej
->flags
|= KVM_CPUID_FLAG_STATE_READ_NEXT
;
2964 return 0; /* silence gcc, even though control never reaches here */
2967 /* find an entry with matching function, matching index (if needed), and that
2968 * should be read next (if it's stateful) */
2969 static int is_matching_cpuid_entry(struct kvm_cpuid_entry2
*e
,
2970 u32 function
, u32 index
)
2972 if (e
->function
!= function
)
2974 if ((e
->flags
& KVM_CPUID_FLAG_SIGNIFCANT_INDEX
) && e
->index
!= index
)
2976 if ((e
->flags
& KVM_CPUID_FLAG_STATEFUL_FUNC
) &&
2977 !(e
->flags
& KVM_CPUID_FLAG_STATE_READ_NEXT
))
2982 struct kvm_cpuid_entry2
*kvm_find_cpuid_entry(struct kvm_vcpu
*vcpu
,
2983 u32 function
, u32 index
)
2986 struct kvm_cpuid_entry2
*best
= NULL
;
2988 for (i
= 0; i
< vcpu
->arch
.cpuid_nent
; ++i
) {
2989 struct kvm_cpuid_entry2
*e
;
2991 e
= &vcpu
->arch
.cpuid_entries
[i
];
2992 if (is_matching_cpuid_entry(e
, function
, index
)) {
2993 if (e
->flags
& KVM_CPUID_FLAG_STATEFUL_FUNC
)
2994 move_to_next_stateful_cpuid_entry(vcpu
, i
);
2999 * Both basic or both extended?
3001 if (((e
->function
^ function
) & 0x80000000) == 0)
3002 if (!best
|| e
->function
> best
->function
)
3008 void kvm_emulate_cpuid(struct kvm_vcpu
*vcpu
)
3010 u32 function
, index
;
3011 struct kvm_cpuid_entry2
*best
;
3013 function
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
3014 index
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
3015 kvm_register_write(vcpu
, VCPU_REGS_RAX
, 0);
3016 kvm_register_write(vcpu
, VCPU_REGS_RBX
, 0);
3017 kvm_register_write(vcpu
, VCPU_REGS_RCX
, 0);
3018 kvm_register_write(vcpu
, VCPU_REGS_RDX
, 0);
3019 best
= kvm_find_cpuid_entry(vcpu
, function
, index
);
3021 kvm_register_write(vcpu
, VCPU_REGS_RAX
, best
->eax
);
3022 kvm_register_write(vcpu
, VCPU_REGS_RBX
, best
->ebx
);
3023 kvm_register_write(vcpu
, VCPU_REGS_RCX
, best
->ecx
);
3024 kvm_register_write(vcpu
, VCPU_REGS_RDX
, best
->edx
);
3026 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
3027 KVMTRACE_5D(CPUID
, vcpu
, function
,
3028 (u32
)kvm_register_read(vcpu
, VCPU_REGS_RAX
),
3029 (u32
)kvm_register_read(vcpu
, VCPU_REGS_RBX
),
3030 (u32
)kvm_register_read(vcpu
, VCPU_REGS_RCX
),
3031 (u32
)kvm_register_read(vcpu
, VCPU_REGS_RDX
), handler
);
3033 EXPORT_SYMBOL_GPL(kvm_emulate_cpuid
);
3036 * Check if userspace requested an interrupt window, and that the
3037 * interrupt window is open.
3039 * No need to exit to userspace if we already have an interrupt queued.
3041 static int dm_request_for_irq_injection(struct kvm_vcpu
*vcpu
,
3042 struct kvm_run
*kvm_run
)
3044 return (!vcpu
->arch
.irq_summary
&&
3045 kvm_run
->request_interrupt_window
&&
3046 vcpu
->arch
.interrupt_window_open
&&
3047 (kvm_x86_ops
->get_rflags(vcpu
) & X86_EFLAGS_IF
));
3050 static void post_kvm_run_save(struct kvm_vcpu
*vcpu
,
3051 struct kvm_run
*kvm_run
)
3053 kvm_run
->if_flag
= (kvm_x86_ops
->get_rflags(vcpu
) & X86_EFLAGS_IF
) != 0;
3054 kvm_run
->cr8
= kvm_get_cr8(vcpu
);
3055 kvm_run
->apic_base
= kvm_get_apic_base(vcpu
);
3056 if (irqchip_in_kernel(vcpu
->kvm
))
3057 kvm_run
->ready_for_interrupt_injection
= 1;
3059 kvm_run
->ready_for_interrupt_injection
=
3060 (vcpu
->arch
.interrupt_window_open
&&
3061 vcpu
->arch
.irq_summary
== 0);
3064 static void vapic_enter(struct kvm_vcpu
*vcpu
)
3066 struct kvm_lapic
*apic
= vcpu
->arch
.apic
;
3069 if (!apic
|| !apic
->vapic_addr
)
3072 page
= gfn_to_page(vcpu
->kvm
, apic
->vapic_addr
>> PAGE_SHIFT
);
3074 vcpu
->arch
.apic
->vapic_page
= page
;
3077 static void vapic_exit(struct kvm_vcpu
*vcpu
)
3079 struct kvm_lapic
*apic
= vcpu
->arch
.apic
;
3081 if (!apic
|| !apic
->vapic_addr
)
3084 down_read(&vcpu
->kvm
->slots_lock
);
3085 kvm_release_page_dirty(apic
->vapic_page
);
3086 mark_page_dirty(vcpu
->kvm
, apic
->vapic_addr
>> PAGE_SHIFT
);
3087 up_read(&vcpu
->kvm
->slots_lock
);
3090 static int vcpu_enter_guest(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
3095 if (test_and_clear_bit(KVM_REQ_MMU_RELOAD
, &vcpu
->requests
))
3096 kvm_mmu_unload(vcpu
);
3098 r
= kvm_mmu_reload(vcpu
);
3102 if (vcpu
->requests
) {
3103 if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER
, &vcpu
->requests
))
3104 __kvm_migrate_timers(vcpu
);
3105 if (test_and_clear_bit(KVM_REQ_KVMCLOCK_UPDATE
, &vcpu
->requests
))
3106 kvm_write_guest_time(vcpu
);
3107 if (test_and_clear_bit(KVM_REQ_MMU_SYNC
, &vcpu
->requests
))
3108 kvm_mmu_sync_roots(vcpu
);
3109 if (test_and_clear_bit(KVM_REQ_TLB_FLUSH
, &vcpu
->requests
))
3110 kvm_x86_ops
->tlb_flush(vcpu
);
3111 if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS
,
3113 kvm_run
->exit_reason
= KVM_EXIT_TPR_ACCESS
;
3117 if (test_and_clear_bit(KVM_REQ_TRIPLE_FAULT
, &vcpu
->requests
)) {
3118 kvm_run
->exit_reason
= KVM_EXIT_SHUTDOWN
;
3124 clear_bit(KVM_REQ_PENDING_TIMER
, &vcpu
->requests
);
3125 kvm_inject_pending_timer_irqs(vcpu
);
3129 kvm_x86_ops
->prepare_guest_switch(vcpu
);
3130 kvm_load_guest_fpu(vcpu
);
3132 local_irq_disable();
3134 if (vcpu
->requests
|| need_resched() || signal_pending(current
)) {
3141 vcpu
->guest_mode
= 1;
3143 * Make sure that guest_mode assignment won't happen after
3144 * testing the pending IRQ vector bitmap.
3148 if (vcpu
->arch
.exception
.pending
)
3149 __queue_exception(vcpu
);
3150 else if (irqchip_in_kernel(vcpu
->kvm
))
3151 kvm_x86_ops
->inject_pending_irq(vcpu
);
3153 kvm_x86_ops
->inject_pending_vectors(vcpu
, kvm_run
);
3155 kvm_lapic_sync_to_vapic(vcpu
);
3157 up_read(&vcpu
->kvm
->slots_lock
);
3161 get_debugreg(vcpu
->arch
.host_dr6
, 6);
3162 get_debugreg(vcpu
->arch
.host_dr7
, 7);
3163 if (unlikely(vcpu
->arch
.switch_db_regs
)) {
3164 get_debugreg(vcpu
->arch
.host_db
[0], 0);
3165 get_debugreg(vcpu
->arch
.host_db
[1], 1);
3166 get_debugreg(vcpu
->arch
.host_db
[2], 2);
3167 get_debugreg(vcpu
->arch
.host_db
[3], 3);
3170 set_debugreg(vcpu
->arch
.eff_db
[0], 0);
3171 set_debugreg(vcpu
->arch
.eff_db
[1], 1);
3172 set_debugreg(vcpu
->arch
.eff_db
[2], 2);
3173 set_debugreg(vcpu
->arch
.eff_db
[3], 3);
3176 KVMTRACE_0D(VMENTRY
, vcpu
, entryexit
);
3177 kvm_x86_ops
->run(vcpu
, kvm_run
);
3179 if (unlikely(vcpu
->arch
.switch_db_regs
)) {
3181 set_debugreg(vcpu
->arch
.host_db
[0], 0);
3182 set_debugreg(vcpu
->arch
.host_db
[1], 1);
3183 set_debugreg(vcpu
->arch
.host_db
[2], 2);
3184 set_debugreg(vcpu
->arch
.host_db
[3], 3);
3186 set_debugreg(vcpu
->arch
.host_dr6
, 6);
3187 set_debugreg(vcpu
->arch
.host_dr7
, 7);
3189 vcpu
->guest_mode
= 0;
3195 * We must have an instruction between local_irq_enable() and
3196 * kvm_guest_exit(), so the timer interrupt isn't delayed by
3197 * the interrupt shadow. The stat.exits increment will do nicely.
3198 * But we need to prevent reordering, hence this barrier():
3206 down_read(&vcpu
->kvm
->slots_lock
);
3209 * Profile KVM exit RIPs:
3211 if (unlikely(prof_on
== KVM_PROFILING
)) {
3212 unsigned long rip
= kvm_rip_read(vcpu
);
3213 profile_hit(KVM_PROFILING
, (void *)rip
);
3216 if (vcpu
->arch
.exception
.pending
&& kvm_x86_ops
->exception_injected(vcpu
))
3217 vcpu
->arch
.exception
.pending
= false;
3219 kvm_lapic_sync_from_vapic(vcpu
);
3221 r
= kvm_x86_ops
->handle_exit(kvm_run
, vcpu
);
3226 static int __vcpu_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
3230 if (unlikely(vcpu
->arch
.mp_state
== KVM_MP_STATE_SIPI_RECEIVED
)) {
3231 pr_debug("vcpu %d received sipi with vector # %x\n",
3232 vcpu
->vcpu_id
, vcpu
->arch
.sipi_vector
);
3233 kvm_lapic_reset(vcpu
);
3234 r
= kvm_arch_vcpu_reset(vcpu
);
3237 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
3240 down_read(&vcpu
->kvm
->slots_lock
);
3245 if (vcpu
->arch
.mp_state
== KVM_MP_STATE_RUNNABLE
)
3246 r
= vcpu_enter_guest(vcpu
, kvm_run
);
3248 up_read(&vcpu
->kvm
->slots_lock
);
3249 kvm_vcpu_block(vcpu
);
3250 down_read(&vcpu
->kvm
->slots_lock
);
3251 if (test_and_clear_bit(KVM_REQ_UNHALT
, &vcpu
->requests
))
3252 if (vcpu
->arch
.mp_state
== KVM_MP_STATE_HALTED
)
3253 vcpu
->arch
.mp_state
=
3254 KVM_MP_STATE_RUNNABLE
;
3255 if (vcpu
->arch
.mp_state
!= KVM_MP_STATE_RUNNABLE
)
3260 if (dm_request_for_irq_injection(vcpu
, kvm_run
)) {
3262 kvm_run
->exit_reason
= KVM_EXIT_INTR
;
3263 ++vcpu
->stat
.request_irq_exits
;
3265 if (signal_pending(current
)) {
3267 kvm_run
->exit_reason
= KVM_EXIT_INTR
;
3268 ++vcpu
->stat
.signal_exits
;
3270 if (need_resched()) {
3271 up_read(&vcpu
->kvm
->slots_lock
);
3273 down_read(&vcpu
->kvm
->slots_lock
);
3278 up_read(&vcpu
->kvm
->slots_lock
);
3279 post_kvm_run_save(vcpu
, kvm_run
);
3286 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
3293 if (vcpu
->sigset_active
)
3294 sigprocmask(SIG_SETMASK
, &vcpu
->sigset
, &sigsaved
);
3296 if (unlikely(vcpu
->arch
.mp_state
== KVM_MP_STATE_UNINITIALIZED
)) {
3297 kvm_vcpu_block(vcpu
);
3298 clear_bit(KVM_REQ_UNHALT
, &vcpu
->requests
);
3303 /* re-sync apic's tpr */
3304 if (!irqchip_in_kernel(vcpu
->kvm
))
3305 kvm_set_cr8(vcpu
, kvm_run
->cr8
);
3307 if (vcpu
->arch
.pio
.cur_count
) {
3308 r
= complete_pio(vcpu
);
3312 #if CONFIG_HAS_IOMEM
3313 if (vcpu
->mmio_needed
) {
3314 memcpy(vcpu
->mmio_data
, kvm_run
->mmio
.data
, 8);
3315 vcpu
->mmio_read_completed
= 1;
3316 vcpu
->mmio_needed
= 0;
3318 down_read(&vcpu
->kvm
->slots_lock
);
3319 r
= emulate_instruction(vcpu
, kvm_run
,
3320 vcpu
->arch
.mmio_fault_cr2
, 0,
3321 EMULTYPE_NO_DECODE
);
3322 up_read(&vcpu
->kvm
->slots_lock
);
3323 if (r
== EMULATE_DO_MMIO
) {
3325 * Read-modify-write. Back to userspace.
3332 if (kvm_run
->exit_reason
== KVM_EXIT_HYPERCALL
)
3333 kvm_register_write(vcpu
, VCPU_REGS_RAX
,
3334 kvm_run
->hypercall
.ret
);
3336 r
= __vcpu_run(vcpu
, kvm_run
);
3339 if (vcpu
->sigset_active
)
3340 sigprocmask(SIG_SETMASK
, &sigsaved
, NULL
);
3346 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
)
3350 regs
->rax
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
3351 regs
->rbx
= kvm_register_read(vcpu
, VCPU_REGS_RBX
);
3352 regs
->rcx
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
3353 regs
->rdx
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
3354 regs
->rsi
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
3355 regs
->rdi
= kvm_register_read(vcpu
, VCPU_REGS_RDI
);
3356 regs
->rsp
= kvm_register_read(vcpu
, VCPU_REGS_RSP
);
3357 regs
->rbp
= kvm_register_read(vcpu
, VCPU_REGS_RBP
);
3358 #ifdef CONFIG_X86_64
3359 regs
->r8
= kvm_register_read(vcpu
, VCPU_REGS_R8
);
3360 regs
->r9
= kvm_register_read(vcpu
, VCPU_REGS_R9
);
3361 regs
->r10
= kvm_register_read(vcpu
, VCPU_REGS_R10
);
3362 regs
->r11
= kvm_register_read(vcpu
, VCPU_REGS_R11
);
3363 regs
->r12
= kvm_register_read(vcpu
, VCPU_REGS_R12
);
3364 regs
->r13
= kvm_register_read(vcpu
, VCPU_REGS_R13
);
3365 regs
->r14
= kvm_register_read(vcpu
, VCPU_REGS_R14
);
3366 regs
->r15
= kvm_register_read(vcpu
, VCPU_REGS_R15
);
3369 regs
->rip
= kvm_rip_read(vcpu
);
3370 regs
->rflags
= kvm_x86_ops
->get_rflags(vcpu
);
3373 * Don't leak debug flags in case they were set for guest debugging
3375 if (vcpu
->guest_debug
& KVM_GUESTDBG_SINGLESTEP
)
3376 regs
->rflags
&= ~(X86_EFLAGS_TF
| X86_EFLAGS_RF
);
3383 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
)
3387 kvm_register_write(vcpu
, VCPU_REGS_RAX
, regs
->rax
);
3388 kvm_register_write(vcpu
, VCPU_REGS_RBX
, regs
->rbx
);
3389 kvm_register_write(vcpu
, VCPU_REGS_RCX
, regs
->rcx
);
3390 kvm_register_write(vcpu
, VCPU_REGS_RDX
, regs
->rdx
);
3391 kvm_register_write(vcpu
, VCPU_REGS_RSI
, regs
->rsi
);
3392 kvm_register_write(vcpu
, VCPU_REGS_RDI
, regs
->rdi
);
3393 kvm_register_write(vcpu
, VCPU_REGS_RSP
, regs
->rsp
);
3394 kvm_register_write(vcpu
, VCPU_REGS_RBP
, regs
->rbp
);
3395 #ifdef CONFIG_X86_64
3396 kvm_register_write(vcpu
, VCPU_REGS_R8
, regs
->r8
);
3397 kvm_register_write(vcpu
, VCPU_REGS_R9
, regs
->r9
);
3398 kvm_register_write(vcpu
, VCPU_REGS_R10
, regs
->r10
);
3399 kvm_register_write(vcpu
, VCPU_REGS_R11
, regs
->r11
);
3400 kvm_register_write(vcpu
, VCPU_REGS_R12
, regs
->r12
);
3401 kvm_register_write(vcpu
, VCPU_REGS_R13
, regs
->r13
);
3402 kvm_register_write(vcpu
, VCPU_REGS_R14
, regs
->r14
);
3403 kvm_register_write(vcpu
, VCPU_REGS_R15
, regs
->r15
);
3407 kvm_rip_write(vcpu
, regs
->rip
);
3408 kvm_x86_ops
->set_rflags(vcpu
, regs
->rflags
);
3411 vcpu
->arch
.exception
.pending
= false;
3418 void kvm_get_segment(struct kvm_vcpu
*vcpu
,
3419 struct kvm_segment
*var
, int seg
)
3421 kvm_x86_ops
->get_segment(vcpu
, var
, seg
);
3424 void kvm_get_cs_db_l_bits(struct kvm_vcpu
*vcpu
, int *db
, int *l
)
3426 struct kvm_segment cs
;
3428 kvm_get_segment(vcpu
, &cs
, VCPU_SREG_CS
);
3432 EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits
);
3434 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
3435 struct kvm_sregs
*sregs
)
3437 struct descriptor_table dt
;
3442 kvm_get_segment(vcpu
, &sregs
->cs
, VCPU_SREG_CS
);
3443 kvm_get_segment(vcpu
, &sregs
->ds
, VCPU_SREG_DS
);
3444 kvm_get_segment(vcpu
, &sregs
->es
, VCPU_SREG_ES
);
3445 kvm_get_segment(vcpu
, &sregs
->fs
, VCPU_SREG_FS
);
3446 kvm_get_segment(vcpu
, &sregs
->gs
, VCPU_SREG_GS
);
3447 kvm_get_segment(vcpu
, &sregs
->ss
, VCPU_SREG_SS
);
3449 kvm_get_segment(vcpu
, &sregs
->tr
, VCPU_SREG_TR
);
3450 kvm_get_segment(vcpu
, &sregs
->ldt
, VCPU_SREG_LDTR
);
3452 kvm_x86_ops
->get_idt(vcpu
, &dt
);
3453 sregs
->idt
.limit
= dt
.limit
;
3454 sregs
->idt
.base
= dt
.base
;
3455 kvm_x86_ops
->get_gdt(vcpu
, &dt
);
3456 sregs
->gdt
.limit
= dt
.limit
;
3457 sregs
->gdt
.base
= dt
.base
;
3459 kvm_x86_ops
->decache_cr4_guest_bits(vcpu
);
3460 sregs
->cr0
= vcpu
->arch
.cr0
;
3461 sregs
->cr2
= vcpu
->arch
.cr2
;
3462 sregs
->cr3
= vcpu
->arch
.cr3
;
3463 sregs
->cr4
= vcpu
->arch
.cr4
;
3464 sregs
->cr8
= kvm_get_cr8(vcpu
);
3465 sregs
->efer
= vcpu
->arch
.shadow_efer
;
3466 sregs
->apic_base
= kvm_get_apic_base(vcpu
);
3468 if (irqchip_in_kernel(vcpu
->kvm
)) {
3469 memset(sregs
->interrupt_bitmap
, 0,
3470 sizeof sregs
->interrupt_bitmap
);
3471 pending_vec
= kvm_x86_ops
->get_irq(vcpu
);
3472 if (pending_vec
>= 0)
3473 set_bit(pending_vec
,
3474 (unsigned long *)sregs
->interrupt_bitmap
);
3476 memcpy(sregs
->interrupt_bitmap
, vcpu
->arch
.irq_pending
,
3477 sizeof sregs
->interrupt_bitmap
);
3484 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
3485 struct kvm_mp_state
*mp_state
)
3488 mp_state
->mp_state
= vcpu
->arch
.mp_state
;
3493 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
3494 struct kvm_mp_state
*mp_state
)
3497 vcpu
->arch
.mp_state
= mp_state
->mp_state
;
3502 static void kvm_set_segment(struct kvm_vcpu
*vcpu
,
3503 struct kvm_segment
*var
, int seg
)
3505 kvm_x86_ops
->set_segment(vcpu
, var
, seg
);
3508 static void seg_desct_to_kvm_desct(struct desc_struct
*seg_desc
, u16 selector
,
3509 struct kvm_segment
*kvm_desct
)
3511 kvm_desct
->base
= seg_desc
->base0
;
3512 kvm_desct
->base
|= seg_desc
->base1
<< 16;
3513 kvm_desct
->base
|= seg_desc
->base2
<< 24;
3514 kvm_desct
->limit
= seg_desc
->limit0
;
3515 kvm_desct
->limit
|= seg_desc
->limit
<< 16;
3517 kvm_desct
->limit
<<= 12;
3518 kvm_desct
->limit
|= 0xfff;
3520 kvm_desct
->selector
= selector
;
3521 kvm_desct
->type
= seg_desc
->type
;
3522 kvm_desct
->present
= seg_desc
->p
;
3523 kvm_desct
->dpl
= seg_desc
->dpl
;
3524 kvm_desct
->db
= seg_desc
->d
;
3525 kvm_desct
->s
= seg_desc
->s
;
3526 kvm_desct
->l
= seg_desc
->l
;
3527 kvm_desct
->g
= seg_desc
->g
;
3528 kvm_desct
->avl
= seg_desc
->avl
;
3530 kvm_desct
->unusable
= 1;
3532 kvm_desct
->unusable
= 0;
3533 kvm_desct
->padding
= 0;
3536 static void get_segment_descriptor_dtable(struct kvm_vcpu
*vcpu
,
3538 struct descriptor_table
*dtable
)
3540 if (selector
& 1 << 2) {
3541 struct kvm_segment kvm_seg
;
3543 kvm_get_segment(vcpu
, &kvm_seg
, VCPU_SREG_LDTR
);
3545 if (kvm_seg
.unusable
)
3548 dtable
->limit
= kvm_seg
.limit
;
3549 dtable
->base
= kvm_seg
.base
;
3552 kvm_x86_ops
->get_gdt(vcpu
, dtable
);
3555 /* allowed just for 8 bytes segments */
3556 static int load_guest_segment_descriptor(struct kvm_vcpu
*vcpu
, u16 selector
,
3557 struct desc_struct
*seg_desc
)
3560 struct descriptor_table dtable
;
3561 u16 index
= selector
>> 3;
3563 get_segment_descriptor_dtable(vcpu
, selector
, &dtable
);
3565 if (dtable
.limit
< index
* 8 + 7) {
3566 kvm_queue_exception_e(vcpu
, GP_VECTOR
, selector
& 0xfffc);
3569 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, dtable
.base
);
3571 return kvm_read_guest(vcpu
->kvm
, gpa
, seg_desc
, 8);
3574 /* allowed just for 8 bytes segments */
3575 static int save_guest_segment_descriptor(struct kvm_vcpu
*vcpu
, u16 selector
,
3576 struct desc_struct
*seg_desc
)
3579 struct descriptor_table dtable
;
3580 u16 index
= selector
>> 3;
3582 get_segment_descriptor_dtable(vcpu
, selector
, &dtable
);
3584 if (dtable
.limit
< index
* 8 + 7)
3586 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, dtable
.base
);
3588 return kvm_write_guest(vcpu
->kvm
, gpa
, seg_desc
, 8);
3591 static u32
get_tss_base_addr(struct kvm_vcpu
*vcpu
,
3592 struct desc_struct
*seg_desc
)
3596 base_addr
= seg_desc
->base0
;
3597 base_addr
|= (seg_desc
->base1
<< 16);
3598 base_addr
|= (seg_desc
->base2
<< 24);
3600 return vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, base_addr
);
3603 static u16
get_segment_selector(struct kvm_vcpu
*vcpu
, int seg
)
3605 struct kvm_segment kvm_seg
;
3607 kvm_get_segment(vcpu
, &kvm_seg
, seg
);
3608 return kvm_seg
.selector
;
3611 static int load_segment_descriptor_to_kvm_desct(struct kvm_vcpu
*vcpu
,
3613 struct kvm_segment
*kvm_seg
)
3615 struct desc_struct seg_desc
;
3617 if (load_guest_segment_descriptor(vcpu
, selector
, &seg_desc
))
3619 seg_desct_to_kvm_desct(&seg_desc
, selector
, kvm_seg
);
3623 static int kvm_load_realmode_segment(struct kvm_vcpu
*vcpu
, u16 selector
, int seg
)
3625 struct kvm_segment segvar
= {
3626 .base
= selector
<< 4,
3628 .selector
= selector
,
3639 kvm_x86_ops
->set_segment(vcpu
, &segvar
, seg
);
3643 int kvm_load_segment_descriptor(struct kvm_vcpu
*vcpu
, u16 selector
,
3644 int type_bits
, int seg
)
3646 struct kvm_segment kvm_seg
;
3648 if (!(vcpu
->arch
.cr0
& X86_CR0_PE
))
3649 return kvm_load_realmode_segment(vcpu
, selector
, seg
);
3650 if (load_segment_descriptor_to_kvm_desct(vcpu
, selector
, &kvm_seg
))
3652 kvm_seg
.type
|= type_bits
;
3654 if (seg
!= VCPU_SREG_SS
&& seg
!= VCPU_SREG_CS
&&
3655 seg
!= VCPU_SREG_LDTR
)
3657 kvm_seg
.unusable
= 1;
3659 kvm_set_segment(vcpu
, &kvm_seg
, seg
);
3663 static void save_state_to_tss32(struct kvm_vcpu
*vcpu
,
3664 struct tss_segment_32
*tss
)
3666 tss
->cr3
= vcpu
->arch
.cr3
;
3667 tss
->eip
= kvm_rip_read(vcpu
);
3668 tss
->eflags
= kvm_x86_ops
->get_rflags(vcpu
);
3669 tss
->eax
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
3670 tss
->ecx
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
3671 tss
->edx
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
3672 tss
->ebx
= kvm_register_read(vcpu
, VCPU_REGS_RBX
);
3673 tss
->esp
= kvm_register_read(vcpu
, VCPU_REGS_RSP
);
3674 tss
->ebp
= kvm_register_read(vcpu
, VCPU_REGS_RBP
);
3675 tss
->esi
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
3676 tss
->edi
= kvm_register_read(vcpu
, VCPU_REGS_RDI
);
3677 tss
->es
= get_segment_selector(vcpu
, VCPU_SREG_ES
);
3678 tss
->cs
= get_segment_selector(vcpu
, VCPU_SREG_CS
);
3679 tss
->ss
= get_segment_selector(vcpu
, VCPU_SREG_SS
);
3680 tss
->ds
= get_segment_selector(vcpu
, VCPU_SREG_DS
);
3681 tss
->fs
= get_segment_selector(vcpu
, VCPU_SREG_FS
);
3682 tss
->gs
= get_segment_selector(vcpu
, VCPU_SREG_GS
);
3683 tss
->ldt_selector
= get_segment_selector(vcpu
, VCPU_SREG_LDTR
);
3684 tss
->prev_task_link
= get_segment_selector(vcpu
, VCPU_SREG_TR
);
3687 static int load_state_from_tss32(struct kvm_vcpu
*vcpu
,
3688 struct tss_segment_32
*tss
)
3690 kvm_set_cr3(vcpu
, tss
->cr3
);
3692 kvm_rip_write(vcpu
, tss
->eip
);
3693 kvm_x86_ops
->set_rflags(vcpu
, tss
->eflags
| 2);
3695 kvm_register_write(vcpu
, VCPU_REGS_RAX
, tss
->eax
);
3696 kvm_register_write(vcpu
, VCPU_REGS_RCX
, tss
->ecx
);
3697 kvm_register_write(vcpu
, VCPU_REGS_RDX
, tss
->edx
);
3698 kvm_register_write(vcpu
, VCPU_REGS_RBX
, tss
->ebx
);
3699 kvm_register_write(vcpu
, VCPU_REGS_RSP
, tss
->esp
);
3700 kvm_register_write(vcpu
, VCPU_REGS_RBP
, tss
->ebp
);
3701 kvm_register_write(vcpu
, VCPU_REGS_RSI
, tss
->esi
);
3702 kvm_register_write(vcpu
, VCPU_REGS_RDI
, tss
->edi
);
3704 if (kvm_load_segment_descriptor(vcpu
, tss
->ldt_selector
, 0, VCPU_SREG_LDTR
))
3707 if (kvm_load_segment_descriptor(vcpu
, tss
->es
, 1, VCPU_SREG_ES
))
3710 if (kvm_load_segment_descriptor(vcpu
, tss
->cs
, 9, VCPU_SREG_CS
))
3713 if (kvm_load_segment_descriptor(vcpu
, tss
->ss
, 1, VCPU_SREG_SS
))
3716 if (kvm_load_segment_descriptor(vcpu
, tss
->ds
, 1, VCPU_SREG_DS
))
3719 if (kvm_load_segment_descriptor(vcpu
, tss
->fs
, 1, VCPU_SREG_FS
))
3722 if (kvm_load_segment_descriptor(vcpu
, tss
->gs
, 1, VCPU_SREG_GS
))
3727 static void save_state_to_tss16(struct kvm_vcpu
*vcpu
,
3728 struct tss_segment_16
*tss
)
3730 tss
->ip
= kvm_rip_read(vcpu
);
3731 tss
->flag
= kvm_x86_ops
->get_rflags(vcpu
);
3732 tss
->ax
= kvm_register_read(vcpu
, VCPU_REGS_RAX
);
3733 tss
->cx
= kvm_register_read(vcpu
, VCPU_REGS_RCX
);
3734 tss
->dx
= kvm_register_read(vcpu
, VCPU_REGS_RDX
);
3735 tss
->bx
= kvm_register_read(vcpu
, VCPU_REGS_RBX
);
3736 tss
->sp
= kvm_register_read(vcpu
, VCPU_REGS_RSP
);
3737 tss
->bp
= kvm_register_read(vcpu
, VCPU_REGS_RBP
);
3738 tss
->si
= kvm_register_read(vcpu
, VCPU_REGS_RSI
);
3739 tss
->di
= kvm_register_read(vcpu
, VCPU_REGS_RDI
);
3741 tss
->es
= get_segment_selector(vcpu
, VCPU_SREG_ES
);
3742 tss
->cs
= get_segment_selector(vcpu
, VCPU_SREG_CS
);
3743 tss
->ss
= get_segment_selector(vcpu
, VCPU_SREG_SS
);
3744 tss
->ds
= get_segment_selector(vcpu
, VCPU_SREG_DS
);
3745 tss
->ldt
= get_segment_selector(vcpu
, VCPU_SREG_LDTR
);
3746 tss
->prev_task_link
= get_segment_selector(vcpu
, VCPU_SREG_TR
);
3749 static int load_state_from_tss16(struct kvm_vcpu
*vcpu
,
3750 struct tss_segment_16
*tss
)
3752 kvm_rip_write(vcpu
, tss
->ip
);
3753 kvm_x86_ops
->set_rflags(vcpu
, tss
->flag
| 2);
3754 kvm_register_write(vcpu
, VCPU_REGS_RAX
, tss
->ax
);
3755 kvm_register_write(vcpu
, VCPU_REGS_RCX
, tss
->cx
);
3756 kvm_register_write(vcpu
, VCPU_REGS_RDX
, tss
->dx
);
3757 kvm_register_write(vcpu
, VCPU_REGS_RBX
, tss
->bx
);
3758 kvm_register_write(vcpu
, VCPU_REGS_RSP
, tss
->sp
);
3759 kvm_register_write(vcpu
, VCPU_REGS_RBP
, tss
->bp
);
3760 kvm_register_write(vcpu
, VCPU_REGS_RSI
, tss
->si
);
3761 kvm_register_write(vcpu
, VCPU_REGS_RDI
, tss
->di
);
3763 if (kvm_load_segment_descriptor(vcpu
, tss
->ldt
, 0, VCPU_SREG_LDTR
))
3766 if (kvm_load_segment_descriptor(vcpu
, tss
->es
, 1, VCPU_SREG_ES
))
3769 if (kvm_load_segment_descriptor(vcpu
, tss
->cs
, 9, VCPU_SREG_CS
))
3772 if (kvm_load_segment_descriptor(vcpu
, tss
->ss
, 1, VCPU_SREG_SS
))
3775 if (kvm_load_segment_descriptor(vcpu
, tss
->ds
, 1, VCPU_SREG_DS
))
3780 static int kvm_task_switch_16(struct kvm_vcpu
*vcpu
, u16 tss_selector
,
3782 struct desc_struct
*nseg_desc
)
3784 struct tss_segment_16 tss_segment_16
;
3787 if (kvm_read_guest(vcpu
->kvm
, old_tss_base
, &tss_segment_16
,
3788 sizeof tss_segment_16
))
3791 save_state_to_tss16(vcpu
, &tss_segment_16
);
3793 if (kvm_write_guest(vcpu
->kvm
, old_tss_base
, &tss_segment_16
,
3794 sizeof tss_segment_16
))
3797 if (kvm_read_guest(vcpu
->kvm
, get_tss_base_addr(vcpu
, nseg_desc
),
3798 &tss_segment_16
, sizeof tss_segment_16
))
3801 if (load_state_from_tss16(vcpu
, &tss_segment_16
))
3809 static int kvm_task_switch_32(struct kvm_vcpu
*vcpu
, u16 tss_selector
,
3811 struct desc_struct
*nseg_desc
)
3813 struct tss_segment_32 tss_segment_32
;
3816 if (kvm_read_guest(vcpu
->kvm
, old_tss_base
, &tss_segment_32
,
3817 sizeof tss_segment_32
))
3820 save_state_to_tss32(vcpu
, &tss_segment_32
);
3822 if (kvm_write_guest(vcpu
->kvm
, old_tss_base
, &tss_segment_32
,
3823 sizeof tss_segment_32
))
3826 if (kvm_read_guest(vcpu
->kvm
, get_tss_base_addr(vcpu
, nseg_desc
),
3827 &tss_segment_32
, sizeof tss_segment_32
))
3830 if (load_state_from_tss32(vcpu
, &tss_segment_32
))
3838 int kvm_task_switch(struct kvm_vcpu
*vcpu
, u16 tss_selector
, int reason
)
3840 struct kvm_segment tr_seg
;
3841 struct desc_struct cseg_desc
;
3842 struct desc_struct nseg_desc
;
3844 u32 old_tss_base
= get_segment_base(vcpu
, VCPU_SREG_TR
);
3845 u16 old_tss_sel
= get_segment_selector(vcpu
, VCPU_SREG_TR
);
3847 old_tss_base
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, old_tss_base
);
3849 /* FIXME: Handle errors. Failure to read either TSS or their
3850 * descriptors should generate a pagefault.
3852 if (load_guest_segment_descriptor(vcpu
, tss_selector
, &nseg_desc
))
3855 if (load_guest_segment_descriptor(vcpu
, old_tss_sel
, &cseg_desc
))
3858 if (reason
!= TASK_SWITCH_IRET
) {
3861 cpl
= kvm_x86_ops
->get_cpl(vcpu
);
3862 if ((tss_selector
& 3) > nseg_desc
.dpl
|| cpl
> nseg_desc
.dpl
) {
3863 kvm_queue_exception_e(vcpu
, GP_VECTOR
, 0);
3868 if (!nseg_desc
.p
|| (nseg_desc
.limit0
| nseg_desc
.limit
<< 16) < 0x67) {
3869 kvm_queue_exception_e(vcpu
, TS_VECTOR
, tss_selector
& 0xfffc);
3873 if (reason
== TASK_SWITCH_IRET
|| reason
== TASK_SWITCH_JMP
) {
3874 cseg_desc
.type
&= ~(1 << 1); //clear the B flag
3875 save_guest_segment_descriptor(vcpu
, old_tss_sel
, &cseg_desc
);
3878 if (reason
== TASK_SWITCH_IRET
) {
3879 u32 eflags
= kvm_x86_ops
->get_rflags(vcpu
);
3880 kvm_x86_ops
->set_rflags(vcpu
, eflags
& ~X86_EFLAGS_NT
);
3883 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
3885 if (nseg_desc
.type
& 8)
3886 ret
= kvm_task_switch_32(vcpu
, tss_selector
, old_tss_base
,
3889 ret
= kvm_task_switch_16(vcpu
, tss_selector
, old_tss_base
,
3892 if (reason
== TASK_SWITCH_CALL
|| reason
== TASK_SWITCH_GATE
) {
3893 u32 eflags
= kvm_x86_ops
->get_rflags(vcpu
);
3894 kvm_x86_ops
->set_rflags(vcpu
, eflags
| X86_EFLAGS_NT
);
3897 if (reason
!= TASK_SWITCH_IRET
) {
3898 nseg_desc
.type
|= (1 << 1);
3899 save_guest_segment_descriptor(vcpu
, tss_selector
,
3903 kvm_x86_ops
->set_cr0(vcpu
, vcpu
->arch
.cr0
| X86_CR0_TS
);
3904 seg_desct_to_kvm_desct(&nseg_desc
, tss_selector
, &tr_seg
);
3906 kvm_set_segment(vcpu
, &tr_seg
, VCPU_SREG_TR
);
3910 EXPORT_SYMBOL_GPL(kvm_task_switch
);
3912 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
3913 struct kvm_sregs
*sregs
)
3915 int mmu_reset_needed
= 0;
3916 int i
, pending_vec
, max_bits
;
3917 struct descriptor_table dt
;
3921 dt
.limit
= sregs
->idt
.limit
;
3922 dt
.base
= sregs
->idt
.base
;
3923 kvm_x86_ops
->set_idt(vcpu
, &dt
);
3924 dt
.limit
= sregs
->gdt
.limit
;
3925 dt
.base
= sregs
->gdt
.base
;
3926 kvm_x86_ops
->set_gdt(vcpu
, &dt
);
3928 vcpu
->arch
.cr2
= sregs
->cr2
;
3929 mmu_reset_needed
|= vcpu
->arch
.cr3
!= sregs
->cr3
;
3930 vcpu
->arch
.cr3
= sregs
->cr3
;
3932 kvm_set_cr8(vcpu
, sregs
->cr8
);
3934 mmu_reset_needed
|= vcpu
->arch
.shadow_efer
!= sregs
->efer
;
3935 kvm_x86_ops
->set_efer(vcpu
, sregs
->efer
);
3936 kvm_set_apic_base(vcpu
, sregs
->apic_base
);
3938 kvm_x86_ops
->decache_cr4_guest_bits(vcpu
);
3940 mmu_reset_needed
|= vcpu
->arch
.cr0
!= sregs
->cr0
;
3941 kvm_x86_ops
->set_cr0(vcpu
, sregs
->cr0
);
3942 vcpu
->arch
.cr0
= sregs
->cr0
;
3944 mmu_reset_needed
|= vcpu
->arch
.cr4
!= sregs
->cr4
;
3945 kvm_x86_ops
->set_cr4(vcpu
, sregs
->cr4
);
3946 if (!is_long_mode(vcpu
) && is_pae(vcpu
))
3947 load_pdptrs(vcpu
, vcpu
->arch
.cr3
);
3949 if (mmu_reset_needed
)
3950 kvm_mmu_reset_context(vcpu
);
3952 if (!irqchip_in_kernel(vcpu
->kvm
)) {
3953 memcpy(vcpu
->arch
.irq_pending
, sregs
->interrupt_bitmap
,
3954 sizeof vcpu
->arch
.irq_pending
);
3955 vcpu
->arch
.irq_summary
= 0;
3956 for (i
= 0; i
< ARRAY_SIZE(vcpu
->arch
.irq_pending
); ++i
)
3957 if (vcpu
->arch
.irq_pending
[i
])
3958 __set_bit(i
, &vcpu
->arch
.irq_summary
);
3960 max_bits
= (sizeof sregs
->interrupt_bitmap
) << 3;
3961 pending_vec
= find_first_bit(
3962 (const unsigned long *)sregs
->interrupt_bitmap
,
3964 /* Only pending external irq is handled here */
3965 if (pending_vec
< max_bits
) {
3966 kvm_x86_ops
->set_irq(vcpu
, pending_vec
);
3967 pr_debug("Set back pending irq %d\n",
3970 kvm_pic_clear_isr_ack(vcpu
->kvm
);
3973 kvm_set_segment(vcpu
, &sregs
->cs
, VCPU_SREG_CS
);
3974 kvm_set_segment(vcpu
, &sregs
->ds
, VCPU_SREG_DS
);
3975 kvm_set_segment(vcpu
, &sregs
->es
, VCPU_SREG_ES
);
3976 kvm_set_segment(vcpu
, &sregs
->fs
, VCPU_SREG_FS
);
3977 kvm_set_segment(vcpu
, &sregs
->gs
, VCPU_SREG_GS
);
3978 kvm_set_segment(vcpu
, &sregs
->ss
, VCPU_SREG_SS
);
3980 kvm_set_segment(vcpu
, &sregs
->tr
, VCPU_SREG_TR
);
3981 kvm_set_segment(vcpu
, &sregs
->ldt
, VCPU_SREG_LDTR
);
3983 /* Older userspace won't unhalt the vcpu on reset. */
3984 if (vcpu
->vcpu_id
== 0 && kvm_rip_read(vcpu
) == 0xfff0 &&
3985 sregs
->cs
.selector
== 0xf000 && sregs
->cs
.base
== 0xffff0000 &&
3986 !(vcpu
->arch
.cr0
& X86_CR0_PE
))
3987 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
3994 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu
*vcpu
,
3995 struct kvm_guest_debug
*dbg
)
4001 if ((dbg
->control
& (KVM_GUESTDBG_ENABLE
| KVM_GUESTDBG_USE_HW_BP
)) ==
4002 (KVM_GUESTDBG_ENABLE
| KVM_GUESTDBG_USE_HW_BP
)) {
4003 for (i
= 0; i
< KVM_NR_DB_REGS
; ++i
)
4004 vcpu
->arch
.eff_db
[i
] = dbg
->arch
.debugreg
[i
];
4005 vcpu
->arch
.switch_db_regs
=
4006 (dbg
->arch
.debugreg
[7] & DR7_BP_EN_MASK
);
4008 for (i
= 0; i
< KVM_NR_DB_REGS
; i
++)
4009 vcpu
->arch
.eff_db
[i
] = vcpu
->arch
.db
[i
];
4010 vcpu
->arch
.switch_db_regs
= (vcpu
->arch
.dr7
& DR7_BP_EN_MASK
);
4013 r
= kvm_x86_ops
->set_guest_debug(vcpu
, dbg
);
4015 if (dbg
->control
& KVM_GUESTDBG_INJECT_DB
)
4016 kvm_queue_exception(vcpu
, DB_VECTOR
);
4017 else if (dbg
->control
& KVM_GUESTDBG_INJECT_BP
)
4018 kvm_queue_exception(vcpu
, BP_VECTOR
);
4026 * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
4027 * we have asm/x86/processor.h
4038 u32 st_space
[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
4039 #ifdef CONFIG_X86_64
4040 u32 xmm_space
[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
4042 u32 xmm_space
[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
4047 * Translate a guest virtual address to a guest physical address.
4049 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
4050 struct kvm_translation
*tr
)
4052 unsigned long vaddr
= tr
->linear_address
;
4056 down_read(&vcpu
->kvm
->slots_lock
);
4057 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, vaddr
);
4058 up_read(&vcpu
->kvm
->slots_lock
);
4059 tr
->physical_address
= gpa
;
4060 tr
->valid
= gpa
!= UNMAPPED_GVA
;
4068 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
)
4070 struct fxsave
*fxsave
= (struct fxsave
*)&vcpu
->arch
.guest_fx_image
;
4074 memcpy(fpu
->fpr
, fxsave
->st_space
, 128);
4075 fpu
->fcw
= fxsave
->cwd
;
4076 fpu
->fsw
= fxsave
->swd
;
4077 fpu
->ftwx
= fxsave
->twd
;
4078 fpu
->last_opcode
= fxsave
->fop
;
4079 fpu
->last_ip
= fxsave
->rip
;
4080 fpu
->last_dp
= fxsave
->rdp
;
4081 memcpy(fpu
->xmm
, fxsave
->xmm_space
, sizeof fxsave
->xmm_space
);
4088 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
)
4090 struct fxsave
*fxsave
= (struct fxsave
*)&vcpu
->arch
.guest_fx_image
;
4094 memcpy(fxsave
->st_space
, fpu
->fpr
, 128);
4095 fxsave
->cwd
= fpu
->fcw
;
4096 fxsave
->swd
= fpu
->fsw
;
4097 fxsave
->twd
= fpu
->ftwx
;
4098 fxsave
->fop
= fpu
->last_opcode
;
4099 fxsave
->rip
= fpu
->last_ip
;
4100 fxsave
->rdp
= fpu
->last_dp
;
4101 memcpy(fxsave
->xmm_space
, fpu
->xmm
, sizeof fxsave
->xmm_space
);
4108 void fx_init(struct kvm_vcpu
*vcpu
)
4110 unsigned after_mxcsr_mask
;
4113 * Touch the fpu the first time in non atomic context as if
4114 * this is the first fpu instruction the exception handler
4115 * will fire before the instruction returns and it'll have to
4116 * allocate ram with GFP_KERNEL.
4119 kvm_fx_save(&vcpu
->arch
.host_fx_image
);
4121 /* Initialize guest FPU by resetting ours and saving into guest's */
4123 kvm_fx_save(&vcpu
->arch
.host_fx_image
);
4125 kvm_fx_save(&vcpu
->arch
.guest_fx_image
);
4126 kvm_fx_restore(&vcpu
->arch
.host_fx_image
);
4129 vcpu
->arch
.cr0
|= X86_CR0_ET
;
4130 after_mxcsr_mask
= offsetof(struct i387_fxsave_struct
, st_space
);
4131 vcpu
->arch
.guest_fx_image
.mxcsr
= 0x1f80;
4132 memset((void *)&vcpu
->arch
.guest_fx_image
+ after_mxcsr_mask
,
4133 0, sizeof(struct i387_fxsave_struct
) - after_mxcsr_mask
);
4135 EXPORT_SYMBOL_GPL(fx_init
);
4137 void kvm_load_guest_fpu(struct kvm_vcpu
*vcpu
)
4139 if (!vcpu
->fpu_active
|| vcpu
->guest_fpu_loaded
)
4142 vcpu
->guest_fpu_loaded
= 1;
4143 kvm_fx_save(&vcpu
->arch
.host_fx_image
);
4144 kvm_fx_restore(&vcpu
->arch
.guest_fx_image
);
4146 EXPORT_SYMBOL_GPL(kvm_load_guest_fpu
);
4148 void kvm_put_guest_fpu(struct kvm_vcpu
*vcpu
)
4150 if (!vcpu
->guest_fpu_loaded
)
4153 vcpu
->guest_fpu_loaded
= 0;
4154 kvm_fx_save(&vcpu
->arch
.guest_fx_image
);
4155 kvm_fx_restore(&vcpu
->arch
.host_fx_image
);
4156 ++vcpu
->stat
.fpu_reload
;
4158 EXPORT_SYMBOL_GPL(kvm_put_guest_fpu
);
4160 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
)
4162 kvm_x86_ops
->vcpu_free(vcpu
);
4165 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
,
4168 return kvm_x86_ops
->vcpu_create(kvm
, id
);
4171 int kvm_arch_vcpu_setup(struct kvm_vcpu
*vcpu
)
4175 /* We do fxsave: this must be aligned. */
4176 BUG_ON((unsigned long)&vcpu
->arch
.host_fx_image
& 0xF);
4178 vcpu
->arch
.mtrr_state
.have_fixed
= 1;
4180 r
= kvm_arch_vcpu_reset(vcpu
);
4182 r
= kvm_mmu_setup(vcpu
);
4189 kvm_x86_ops
->vcpu_free(vcpu
);
4193 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
)
4196 kvm_mmu_unload(vcpu
);
4199 kvm_x86_ops
->vcpu_free(vcpu
);
4202 int kvm_arch_vcpu_reset(struct kvm_vcpu
*vcpu
)
4204 vcpu
->arch
.nmi_pending
= false;
4205 vcpu
->arch
.nmi_injected
= false;
4207 vcpu
->arch
.switch_db_regs
= 0;
4208 memset(vcpu
->arch
.db
, 0, sizeof(vcpu
->arch
.db
));
4209 vcpu
->arch
.dr6
= DR6_FIXED_1
;
4210 vcpu
->arch
.dr7
= DR7_FIXED_1
;
4212 return kvm_x86_ops
->vcpu_reset(vcpu
);
4215 void kvm_arch_hardware_enable(void *garbage
)
4217 kvm_x86_ops
->hardware_enable(garbage
);
4220 void kvm_arch_hardware_disable(void *garbage
)
4222 kvm_x86_ops
->hardware_disable(garbage
);
4225 int kvm_arch_hardware_setup(void)
4227 return kvm_x86_ops
->hardware_setup();
4230 void kvm_arch_hardware_unsetup(void)
4232 kvm_x86_ops
->hardware_unsetup();
4235 void kvm_arch_check_processor_compat(void *rtn
)
4237 kvm_x86_ops
->check_processor_compatibility(rtn
);
4240 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
)
4246 BUG_ON(vcpu
->kvm
== NULL
);
4249 vcpu
->arch
.mmu
.root_hpa
= INVALID_PAGE
;
4250 if (!irqchip_in_kernel(kvm
) || vcpu
->vcpu_id
== 0)
4251 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
4253 vcpu
->arch
.mp_state
= KVM_MP_STATE_UNINITIALIZED
;
4255 page
= alloc_page(GFP_KERNEL
| __GFP_ZERO
);
4260 vcpu
->arch
.pio_data
= page_address(page
);
4262 r
= kvm_mmu_create(vcpu
);
4264 goto fail_free_pio_data
;
4266 if (irqchip_in_kernel(kvm
)) {
4267 r
= kvm_create_lapic(vcpu
);
4269 goto fail_mmu_destroy
;
4275 kvm_mmu_destroy(vcpu
);
4277 free_page((unsigned long)vcpu
->arch
.pio_data
);
4282 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
)
4284 kvm_free_lapic(vcpu
);
4285 down_read(&vcpu
->kvm
->slots_lock
);
4286 kvm_mmu_destroy(vcpu
);
4287 up_read(&vcpu
->kvm
->slots_lock
);
4288 free_page((unsigned long)vcpu
->arch
.pio_data
);
4291 struct kvm
*kvm_arch_create_vm(void)
4293 struct kvm
*kvm
= kzalloc(sizeof(struct kvm
), GFP_KERNEL
);
4296 return ERR_PTR(-ENOMEM
);
4298 INIT_LIST_HEAD(&kvm
->arch
.active_mmu_pages
);
4299 INIT_LIST_HEAD(&kvm
->arch
.oos_global_pages
);
4300 INIT_LIST_HEAD(&kvm
->arch
.assigned_dev_head
);
4302 /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
4303 set_bit(KVM_USERSPACE_IRQ_SOURCE_ID
, &kvm
->arch
.irq_sources_bitmap
);
4305 rdtscll(kvm
->arch
.vm_init_tsc
);
4310 static void kvm_unload_vcpu_mmu(struct kvm_vcpu
*vcpu
)
4313 kvm_mmu_unload(vcpu
);
4317 static void kvm_free_vcpus(struct kvm
*kvm
)
4322 * Unpin any mmu pages first.
4324 for (i
= 0; i
< KVM_MAX_VCPUS
; ++i
)
4326 kvm_unload_vcpu_mmu(kvm
->vcpus
[i
]);
4327 for (i
= 0; i
< KVM_MAX_VCPUS
; ++i
) {
4328 if (kvm
->vcpus
[i
]) {
4329 kvm_arch_vcpu_free(kvm
->vcpus
[i
]);
4330 kvm
->vcpus
[i
] = NULL
;
4336 void kvm_arch_sync_events(struct kvm
*kvm
)
4338 kvm_free_all_assigned_devices(kvm
);
4341 void kvm_arch_destroy_vm(struct kvm
*kvm
)
4343 kvm_iommu_unmap_guest(kvm
);
4345 kfree(kvm
->arch
.vpic
);
4346 kfree(kvm
->arch
.vioapic
);
4347 kvm_free_vcpus(kvm
);
4348 kvm_free_physmem(kvm
);
4349 if (kvm
->arch
.apic_access_page
)
4350 put_page(kvm
->arch
.apic_access_page
);
4351 if (kvm
->arch
.ept_identity_pagetable
)
4352 put_page(kvm
->arch
.ept_identity_pagetable
);
4356 int kvm_arch_set_memory_region(struct kvm
*kvm
,
4357 struct kvm_userspace_memory_region
*mem
,
4358 struct kvm_memory_slot old
,
4361 int npages
= mem
->memory_size
>> PAGE_SHIFT
;
4362 struct kvm_memory_slot
*memslot
= &kvm
->memslots
[mem
->slot
];
4364 /*To keep backward compatibility with older userspace,
4365 *x86 needs to hanlde !user_alloc case.
4368 if (npages
&& !old
.rmap
) {
4369 unsigned long userspace_addr
;
4371 down_write(¤t
->mm
->mmap_sem
);
4372 userspace_addr
= do_mmap(NULL
, 0,
4374 PROT_READ
| PROT_WRITE
,
4375 MAP_PRIVATE
| MAP_ANONYMOUS
,
4377 up_write(¤t
->mm
->mmap_sem
);
4379 if (IS_ERR((void *)userspace_addr
))
4380 return PTR_ERR((void *)userspace_addr
);
4382 /* set userspace_addr atomically for kvm_hva_to_rmapp */
4383 spin_lock(&kvm
->mmu_lock
);
4384 memslot
->userspace_addr
= userspace_addr
;
4385 spin_unlock(&kvm
->mmu_lock
);
4387 if (!old
.user_alloc
&& old
.rmap
) {
4390 down_write(¤t
->mm
->mmap_sem
);
4391 ret
= do_munmap(current
->mm
, old
.userspace_addr
,
4392 old
.npages
* PAGE_SIZE
);
4393 up_write(¤t
->mm
->mmap_sem
);
4396 "kvm_vm_ioctl_set_memory_region: "
4397 "failed to munmap memory\n");
4402 if (!kvm
->arch
.n_requested_mmu_pages
) {
4403 unsigned int nr_mmu_pages
= kvm_mmu_calculate_mmu_pages(kvm
);
4404 kvm_mmu_change_mmu_pages(kvm
, nr_mmu_pages
);
4407 kvm_mmu_slot_remove_write_access(kvm
, mem
->slot
);
4408 kvm_flush_remote_tlbs(kvm
);
4413 void kvm_arch_flush_shadow(struct kvm
*kvm
)
4415 kvm_mmu_zap_all(kvm
);
4418 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
)
4420 return vcpu
->arch
.mp_state
== KVM_MP_STATE_RUNNABLE
4421 || vcpu
->arch
.mp_state
== KVM_MP_STATE_SIPI_RECEIVED
4422 || vcpu
->arch
.nmi_pending
;
4425 static void vcpu_kick_intr(void *info
)
4428 struct kvm_vcpu
*vcpu
= (struct kvm_vcpu
*)info
;
4429 printk(KERN_DEBUG
"vcpu_kick_intr %p \n", vcpu
);
4433 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
)
4435 int ipi_pcpu
= vcpu
->cpu
;
4436 int cpu
= get_cpu();
4438 if (waitqueue_active(&vcpu
->wq
)) {
4439 wake_up_interruptible(&vcpu
->wq
);
4440 ++vcpu
->stat
.halt_wakeup
;
4443 * We may be called synchronously with irqs disabled in guest mode,
4444 * So need not to call smp_call_function_single() in that case.
4446 if (vcpu
->guest_mode
&& vcpu
->cpu
!= cpu
)
4447 smp_call_function_single(ipi_pcpu
, vcpu_kick_intr
, vcpu
, 0);