2 * Kernel-based Virtual Machine driver for Linux
6 * Copyright (C) 2006 Qumranet, Inc.
9 * Yaniv Kamay <yaniv@qumranet.com>
10 * Avi Kivity <avi@qumranet.com>
12 * This work is licensed under the terms of the GNU GPL, version 2. See
13 * the COPYING file in the top-level directory.
17 #include <linux/module.h>
18 #include <linux/vmalloc.h>
19 #include <linux/highmem.h>
23 #include "x86_emulate.h"
25 MODULE_AUTHOR("Qumranet");
26 MODULE_LICENSE("GPL");
28 #define IOPM_ALLOC_ORDER 2
29 #define MSRPM_ALLOC_ORDER 1
35 #define DR7_GD_MASK (1 << 13)
36 #define DR6_BD_MASK (1 << 13)
37 #define CR4_DE_MASK (1UL << 3)
39 #define SEG_TYPE_LDT 2
40 #define SEG_TYPE_BUSY_TSS16 3
42 #define KVM_EFER_LMA (1 << 10)
43 #define KVM_EFER_LME (1 << 8)
45 unsigned long iopm_base;
46 unsigned long msrpm_base;
48 struct kvm_ldttss_desc {
51 unsigned base1 : 8, type : 5, dpl : 2, p : 1;
52 unsigned limit1 : 4, zero0 : 3, g : 1, base2 : 8;
55 } __attribute__((packed));
60 uint64_t asid_generation;
63 struct kvm_ldttss_desc *tss_desc;
65 struct page *save_area;
68 static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data);
70 struct svm_init_data {
75 static u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000};
77 #define NUM_MSR_MAPS (sizeof(msrpm_ranges) / sizeof(*msrpm_ranges))
78 #define MSRS_RANGE_SIZE 2048
79 #define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2)
81 #define MAX_INST_SIZE 15
83 static unsigned get_addr_size(struct kvm_vcpu *vcpu)
85 struct vmcb_save_area *sa = &vcpu->svm->vmcb->save;
88 if (!(sa->cr0 & CR0_PE_MASK) || (sa->rflags & X86_EFLAGS_VM))
91 cs_attrib = sa->cs.attrib;
93 return (cs_attrib & SVM_SELECTOR_L_MASK) ? 8 :
94 (cs_attrib & SVM_SELECTOR_DB_MASK) ? 4 : 2;
97 static inline u8 pop_irq(struct kvm_vcpu *vcpu)
99 int word_index = __ffs(vcpu->irq_summary);
100 int bit_index = __ffs(vcpu->irq_pending[word_index]);
101 int irq = word_index * BITS_PER_LONG + bit_index;
103 clear_bit(bit_index, &vcpu->irq_pending[word_index]);
104 if (!vcpu->irq_pending[word_index])
105 clear_bit(word_index, &vcpu->irq_summary);
109 static inline void push_irq(struct kvm_vcpu *vcpu, u8 irq)
111 set_bit(irq, vcpu->irq_pending);
112 set_bit(irq / BITS_PER_LONG, &vcpu->irq_summary);
115 static inline void clgi(void)
117 asm volatile (SVM_CLGI);
120 static inline void stgi(void)
122 asm volatile (SVM_STGI);
125 static inline void invlpga(unsigned long addr, u32 asid)
127 asm volatile (SVM_INVLPGA :: "a"(addr), "c"(asid));
130 static inline unsigned long kvm_read_cr2(void)
134 asm volatile ("mov %%cr2, %0" : "=r" (cr2));
138 static inline void kvm_write_cr2(unsigned long val)
140 asm volatile ("mov %0, %%cr2" :: "r" (val));
143 static inline unsigned long read_dr6(void)
147 asm volatile ("mov %%dr6, %0" : "=r" (dr6));
151 static inline void write_dr6(unsigned long val)
153 asm volatile ("mov %0, %%dr6" :: "r" (val));
156 static inline unsigned long read_dr7(void)
160 asm volatile ("mov %%dr7, %0" : "=r" (dr7));
164 static inline void write_dr7(unsigned long val)
166 asm volatile ("mov %0, %%dr7" :: "r" (val));
169 static inline void force_new_asid(struct kvm_vcpu *vcpu)
171 vcpu->svm->asid_generation--;
174 static inline void flush_guest_tlb(struct kvm_vcpu *vcpu)
176 force_new_asid(vcpu);
179 static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer)
181 if (!(efer & KVM_EFER_LMA))
182 efer &= ~KVM_EFER_LME;
184 vcpu->svm->vmcb->save.efer = efer | MSR_EFER_SVME_MASK;
185 vcpu->shadow_efer = efer;
188 static void svm_inject_gp(struct kvm_vcpu *vcpu, unsigned error_code)
190 vcpu->svm->vmcb->control.event_inj = SVM_EVTINJ_VALID |
191 SVM_EVTINJ_VALID_ERR |
192 SVM_EVTINJ_TYPE_EXEPT |
194 vcpu->svm->vmcb->control.event_inj_err = error_code;
197 static void inject_ud(struct kvm_vcpu *vcpu)
199 vcpu->svm->vmcb->control.event_inj = SVM_EVTINJ_VALID |
200 SVM_EVTINJ_TYPE_EXEPT |
204 static void inject_db(struct kvm_vcpu *vcpu)
206 vcpu->svm->vmcb->control.event_inj = SVM_EVTINJ_VALID |
207 SVM_EVTINJ_TYPE_EXEPT |
211 static int is_page_fault(uint32_t info)
213 info &= SVM_EVTINJ_VEC_MASK | SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID;
214 return info == (PF_VECTOR | SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_EXEPT);
217 static int is_external_interrupt(u32 info)
219 info &= SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID;
220 return info == (SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR);
223 static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
225 if (!vcpu->svm->next_rip) {
226 printk(KERN_DEBUG "%s: NOP\n", __FUNCTION__);
229 if (vcpu->svm->next_rip - vcpu->svm->vmcb->save.rip > 15) {
230 printk(KERN_ERR "%s: ip 0x%llx next 0x%llx\n",
232 vcpu->svm->vmcb->save.rip,
233 vcpu->svm->next_rip);
236 vcpu->rip = vcpu->svm->vmcb->save.rip = vcpu->svm->next_rip;
237 vcpu->svm->vmcb->control.int_state &= ~SVM_INTERRUPT_SHADOW_MASK;
239 vcpu->interrupt_window_open = 1;
242 static int has_svm(void)
244 uint32_t eax, ebx, ecx, edx;
246 if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD) {
247 printk(KERN_INFO "has_svm: not amd\n");
251 cpuid(0x80000000, &eax, &ebx, &ecx, &edx);
252 if (eax < SVM_CPUID_FUNC) {
253 printk(KERN_INFO "has_svm: can't execute cpuid_8000000a\n");
257 cpuid(0x80000001, &eax, &ebx, &ecx, &edx);
258 if (!(ecx & (1 << SVM_CPUID_FEATURE_SHIFT))) {
259 printk(KERN_DEBUG "has_svm: svm not available\n");
265 static void svm_hardware_disable(void *garbage)
267 struct svm_cpu_data *svm_data
268 = per_cpu(svm_data, raw_smp_processor_id());
273 wrmsrl(MSR_VM_HSAVE_PA, 0);
274 rdmsrl(MSR_EFER, efer);
275 wrmsrl(MSR_EFER, efer & ~MSR_EFER_SVME_MASK);
276 per_cpu(svm_data, raw_smp_processor_id()) = 0;
277 __free_page(svm_data->save_area);
282 static void svm_hardware_enable(void *garbage)
285 struct svm_cpu_data *svm_data;
288 struct desc_ptr gdt_descr;
290 struct Xgt_desc_struct gdt_descr;
292 struct desc_struct *gdt;
293 int me = raw_smp_processor_id();
296 printk(KERN_ERR "svm_cpu_init: err EOPNOTSUPP on %d\n", me);
299 svm_data = per_cpu(svm_data, me);
302 printk(KERN_ERR "svm_cpu_init: svm_data is NULL on %d\n",
307 svm_data->asid_generation = 1;
308 svm_data->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
309 svm_data->next_asid = svm_data->max_asid + 1;
311 asm volatile ( "sgdt %0" : "=m"(gdt_descr) );
312 gdt = (struct desc_struct *)gdt_descr.address;
313 svm_data->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS);
315 rdmsrl(MSR_EFER, efer);
316 wrmsrl(MSR_EFER, efer | MSR_EFER_SVME_MASK);
318 wrmsrl(MSR_VM_HSAVE_PA,
319 page_to_pfn(svm_data->save_area) << PAGE_SHIFT);
322 static int svm_cpu_init(int cpu)
324 struct svm_cpu_data *svm_data;
327 svm_data = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL);
331 svm_data->save_area = alloc_page(GFP_KERNEL);
333 if (!svm_data->save_area)
336 per_cpu(svm_data, cpu) = svm_data;
346 static int set_msr_interception(u32 *msrpm, unsigned msr,
351 for (i = 0; i < NUM_MSR_MAPS; i++) {
352 if (msr >= msrpm_ranges[i] &&
353 msr < msrpm_ranges[i] + MSRS_IN_RANGE) {
354 u32 msr_offset = (i * MSRS_IN_RANGE + msr -
355 msrpm_ranges[i]) * 2;
357 u32 *base = msrpm + (msr_offset / 32);
358 u32 msr_shift = msr_offset % 32;
359 u32 mask = ((write) ? 0 : 2) | ((read) ? 0 : 1);
360 *base = (*base & ~(0x3 << msr_shift)) |
365 printk(KERN_DEBUG "%s: not found 0x%x\n", __FUNCTION__, msr);
369 static __init int svm_hardware_setup(void)
372 struct page *iopm_pages;
373 struct page *msrpm_pages;
377 kvm_emulator_want_group7_invlpg();
379 iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER);
383 memset(page_address(iopm_pages), 0xff,
384 PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
385 iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT;
388 msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER);
394 msrpm_va = page_address(msrpm_pages);
395 memset(msrpm_va, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER));
396 msrpm_base = page_to_pfn(msrpm_pages) << PAGE_SHIFT;
399 set_msr_interception(msrpm_va, MSR_GS_BASE, 1, 1);
400 set_msr_interception(msrpm_va, MSR_FS_BASE, 1, 1);
401 set_msr_interception(msrpm_va, MSR_KERNEL_GS_BASE, 1, 1);
402 set_msr_interception(msrpm_va, MSR_LSTAR, 1, 1);
403 set_msr_interception(msrpm_va, MSR_CSTAR, 1, 1);
404 set_msr_interception(msrpm_va, MSR_SYSCALL_MASK, 1, 1);
406 set_msr_interception(msrpm_va, MSR_K6_STAR, 1, 1);
407 set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_CS, 1, 1);
408 set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_ESP, 1, 1);
409 set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_EIP, 1, 1);
411 for_each_online_cpu(cpu) {
412 r = svm_cpu_init(cpu);
419 __free_pages(msrpm_pages, MSRPM_ALLOC_ORDER);
422 __free_pages(iopm_pages, IOPM_ALLOC_ORDER);
427 static __exit void svm_hardware_unsetup(void)
429 __free_pages(pfn_to_page(msrpm_base >> PAGE_SHIFT), MSRPM_ALLOC_ORDER);
430 __free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER);
431 iopm_base = msrpm_base = 0;
434 static void init_seg(struct vmcb_seg *seg)
437 seg->attrib = SVM_SELECTOR_P_MASK | SVM_SELECTOR_S_MASK |
438 SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */
443 static void init_sys_seg(struct vmcb_seg *seg, uint32_t type)
446 seg->attrib = SVM_SELECTOR_P_MASK | type;
451 static int svm_vcpu_setup(struct kvm_vcpu *vcpu)
456 static void init_vmcb(struct vmcb *vmcb)
458 struct vmcb_control_area *control = &vmcb->control;
459 struct vmcb_save_area *save = &vmcb->save;
462 control->intercept_cr_read = INTERCEPT_CR0_MASK |
466 control->intercept_cr_write = INTERCEPT_CR0_MASK |
470 control->intercept_dr_read = INTERCEPT_DR0_MASK |
475 control->intercept_dr_write = INTERCEPT_DR0_MASK |
482 control->intercept_exceptions = 1 << PF_VECTOR;
485 control->intercept = (1ULL << INTERCEPT_INTR) |
486 (1ULL << INTERCEPT_NMI) |
488 * selective cr0 intercept bug?
489 * 0: 0f 22 d8 mov %eax,%cr3
490 * 3: 0f 20 c0 mov %cr0,%eax
491 * 6: 0d 00 00 00 80 or $0x80000000,%eax
492 * b: 0f 22 c0 mov %eax,%cr0
493 * set cr3 ->interception
494 * get cr0 ->interception
495 * set cr0 -> no interception
497 /* (1ULL << INTERCEPT_SELECTIVE_CR0) | */
498 (1ULL << INTERCEPT_CPUID) |
499 (1ULL << INTERCEPT_HLT) |
500 (1ULL << INTERCEPT_INVLPG) |
501 (1ULL << INTERCEPT_INVLPGA) |
502 (1ULL << INTERCEPT_IOIO_PROT) |
503 (1ULL << INTERCEPT_MSR_PROT) |
504 (1ULL << INTERCEPT_TASK_SWITCH) |
505 (1ULL << INTERCEPT_VMRUN) |
506 (1ULL << INTERCEPT_VMMCALL) |
507 (1ULL << INTERCEPT_VMLOAD) |
508 (1ULL << INTERCEPT_VMSAVE) |
509 (1ULL << INTERCEPT_STGI) |
510 (1ULL << INTERCEPT_CLGI) |
511 (1ULL << INTERCEPT_SKINIT);
513 control->iopm_base_pa = iopm_base;
514 control->msrpm_base_pa = msrpm_base;
516 control->tsc_offset = -tsc;
517 control->int_ctl = V_INTR_MASKING_MASK;
525 save->cs.selector = 0xf000;
526 /* Executable/Readable Code Segment */
527 save->cs.attrib = SVM_SELECTOR_READ_MASK | SVM_SELECTOR_P_MASK |
528 SVM_SELECTOR_S_MASK | SVM_SELECTOR_CODE_MASK;
529 save->cs.limit = 0xffff;
530 save->cs.base = 0xffff0000;
532 save->gdtr.limit = 0xffff;
533 save->idtr.limit = 0xffff;
535 init_sys_seg(&save->ldtr, SEG_TYPE_LDT);
536 init_sys_seg(&save->tr, SEG_TYPE_BUSY_TSS16);
538 save->efer = MSR_EFER_SVME_MASK;
540 save->dr6 = 0xffff0ff0;
543 save->rip = 0x0000fff0;
546 * cr0 val on cpu init should be 0x60000010, we enable cpu
547 * cache by default. the orderly way is to enable cache in bios.
549 save->cr0 = 0x00000010 | CR0_PG_MASK;
550 save->cr4 = CR4_PAE_MASK;
554 static int svm_create_vcpu(struct kvm_vcpu *vcpu)
560 vcpu->svm = kzalloc(sizeof *vcpu->svm, GFP_KERNEL);
563 page = alloc_page(GFP_KERNEL);
567 vcpu->svm->vmcb = page_address(page);
568 memset(vcpu->svm->vmcb, 0, PAGE_SIZE);
569 vcpu->svm->vmcb_pa = page_to_pfn(page) << PAGE_SHIFT;
570 vcpu->svm->cr0 = 0x00000010;
571 vcpu->svm->asid_generation = 0;
572 memset(vcpu->svm->db_regs, 0, sizeof(vcpu->svm->db_regs));
573 init_vmcb(vcpu->svm->vmcb);
585 static void svm_free_vcpu(struct kvm_vcpu *vcpu)
590 __free_page(pfn_to_page(vcpu->svm->vmcb_pa >> PAGE_SHIFT));
594 static struct kvm_vcpu *svm_vcpu_load(struct kvm_vcpu *vcpu)
600 static void svm_vcpu_put(struct kvm_vcpu *vcpu)
605 static void svm_cache_regs(struct kvm_vcpu *vcpu)
607 vcpu->regs[VCPU_REGS_RAX] = vcpu->svm->vmcb->save.rax;
608 vcpu->regs[VCPU_REGS_RSP] = vcpu->svm->vmcb->save.rsp;
609 vcpu->rip = vcpu->svm->vmcb->save.rip;
612 static void svm_decache_regs(struct kvm_vcpu *vcpu)
614 vcpu->svm->vmcb->save.rax = vcpu->regs[VCPU_REGS_RAX];
615 vcpu->svm->vmcb->save.rsp = vcpu->regs[VCPU_REGS_RSP];
616 vcpu->svm->vmcb->save.rip = vcpu->rip;
619 static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu)
621 return vcpu->svm->vmcb->save.rflags;
624 static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
626 vcpu->svm->vmcb->save.rflags = rflags;
629 static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg)
631 struct vmcb_save_area *save = &vcpu->svm->vmcb->save;
634 case VCPU_SREG_CS: return &save->cs;
635 case VCPU_SREG_DS: return &save->ds;
636 case VCPU_SREG_ES: return &save->es;
637 case VCPU_SREG_FS: return &save->fs;
638 case VCPU_SREG_GS: return &save->gs;
639 case VCPU_SREG_SS: return &save->ss;
640 case VCPU_SREG_TR: return &save->tr;
641 case VCPU_SREG_LDTR: return &save->ldtr;
647 static u64 svm_get_segment_base(struct kvm_vcpu *vcpu, int seg)
649 struct vmcb_seg *s = svm_seg(vcpu, seg);
654 static void svm_get_segment(struct kvm_vcpu *vcpu,
655 struct kvm_segment *var, int seg)
657 struct vmcb_seg *s = svm_seg(vcpu, seg);
660 var->limit = s->limit;
661 var->selector = s->selector;
662 var->type = s->attrib & SVM_SELECTOR_TYPE_MASK;
663 var->s = (s->attrib >> SVM_SELECTOR_S_SHIFT) & 1;
664 var->dpl = (s->attrib >> SVM_SELECTOR_DPL_SHIFT) & 3;
665 var->present = (s->attrib >> SVM_SELECTOR_P_SHIFT) & 1;
666 var->avl = (s->attrib >> SVM_SELECTOR_AVL_SHIFT) & 1;
667 var->l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1;
668 var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1;
669 var->g = (s->attrib >> SVM_SELECTOR_G_SHIFT) & 1;
670 var->unusable = !var->present;
673 static void svm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
675 struct vmcb_seg *s = svm_seg(vcpu, VCPU_SREG_CS);
677 *db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1;
678 *l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1;
681 static void svm_get_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
683 dt->limit = vcpu->svm->vmcb->save.ldtr.limit;
684 dt->base = vcpu->svm->vmcb->save.ldtr.base;
687 static void svm_set_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
689 vcpu->svm->vmcb->save.ldtr.limit = dt->limit;
690 vcpu->svm->vmcb->save.ldtr.base = dt->base ;
693 static void svm_get_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
695 dt->limit = vcpu->svm->vmcb->save.gdtr.limit;
696 dt->base = vcpu->svm->vmcb->save.gdtr.base;
699 static void svm_set_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
701 vcpu->svm->vmcb->save.gdtr.limit = dt->limit;
702 vcpu->svm->vmcb->save.gdtr.base = dt->base ;
705 static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
708 if (vcpu->shadow_efer & KVM_EFER_LME) {
709 if (!is_paging(vcpu) && (cr0 & CR0_PG_MASK)) {
710 vcpu->shadow_efer |= KVM_EFER_LMA;
711 vcpu->svm->vmcb->save.efer |= KVM_EFER_LMA | KVM_EFER_LME;
714 if (is_paging(vcpu) && !(cr0 & CR0_PG_MASK) ) {
715 vcpu->shadow_efer &= ~KVM_EFER_LMA;
716 vcpu->svm->vmcb->save.efer &= ~(KVM_EFER_LMA | KVM_EFER_LME);
720 vcpu->svm->cr0 = cr0;
721 vcpu->svm->vmcb->save.cr0 = cr0 | CR0_PG_MASK;
725 static void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
728 vcpu->svm->vmcb->save.cr4 = cr4 | CR4_PAE_MASK;
731 static void svm_set_segment(struct kvm_vcpu *vcpu,
732 struct kvm_segment *var, int seg)
734 struct vmcb_seg *s = svm_seg(vcpu, seg);
737 s->limit = var->limit;
738 s->selector = var->selector;
742 s->attrib = (var->type & SVM_SELECTOR_TYPE_MASK);
743 s->attrib |= (var->s & 1) << SVM_SELECTOR_S_SHIFT;
744 s->attrib |= (var->dpl & 3) << SVM_SELECTOR_DPL_SHIFT;
745 s->attrib |= (var->present & 1) << SVM_SELECTOR_P_SHIFT;
746 s->attrib |= (var->avl & 1) << SVM_SELECTOR_AVL_SHIFT;
747 s->attrib |= (var->l & 1) << SVM_SELECTOR_L_SHIFT;
748 s->attrib |= (var->db & 1) << SVM_SELECTOR_DB_SHIFT;
749 s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT;
751 if (seg == VCPU_SREG_CS)
752 vcpu->svm->vmcb->save.cpl
753 = (vcpu->svm->vmcb->save.cs.attrib
754 >> SVM_SELECTOR_DPL_SHIFT) & 3;
760 vcpu->svm->vmcb->control.int_ctl &= ~V_TPR_MASK;
761 vcpu->svm->vmcb->control.int_ctl |= (sregs->cr8 & V_TPR_MASK);
765 static int svm_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg)
770 static void load_host_msrs(struct kvm_vcpu *vcpu)
774 for ( i = 0; i < NR_HOST_SAVE_MSRS; i++)
775 wrmsrl(host_save_msrs[i], vcpu->svm->host_msrs[i]);
778 static void save_host_msrs(struct kvm_vcpu *vcpu)
782 for ( i = 0; i < NR_HOST_SAVE_MSRS; i++)
783 rdmsrl(host_save_msrs[i], vcpu->svm->host_msrs[i]);
786 static void new_asid(struct kvm_vcpu *vcpu, struct svm_cpu_data *svm_data)
788 if (svm_data->next_asid > svm_data->max_asid) {
789 ++svm_data->asid_generation;
790 svm_data->next_asid = 1;
791 vcpu->svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID;
794 vcpu->cpu = svm_data->cpu;
795 vcpu->svm->asid_generation = svm_data->asid_generation;
796 vcpu->svm->vmcb->control.asid = svm_data->next_asid++;
799 static void svm_invlpg(struct kvm_vcpu *vcpu, gva_t address)
801 invlpga(address, vcpu->svm->vmcb->control.asid); // is needed?
804 static unsigned long svm_get_dr(struct kvm_vcpu *vcpu, int dr)
806 return vcpu->svm->db_regs[dr];
809 static void svm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long value,
814 if (vcpu->svm->vmcb->save.dr7 & DR7_GD_MASK) {
815 vcpu->svm->vmcb->save.dr7 &= ~DR7_GD_MASK;
816 vcpu->svm->vmcb->save.dr6 |= DR6_BD_MASK;
817 *exception = DB_VECTOR;
823 vcpu->svm->db_regs[dr] = value;
826 if (vcpu->cr4 & CR4_DE_MASK) {
827 *exception = UD_VECTOR;
831 if (value & ~((1ULL << 32) - 1)) {
832 *exception = GP_VECTOR;
835 vcpu->svm->vmcb->save.dr7 = value;
839 printk(KERN_DEBUG "%s: unexpected dr %u\n",
841 *exception = UD_VECTOR;
846 static int pf_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
848 u32 exit_int_info = vcpu->svm->vmcb->control.exit_int_info;
851 enum emulation_result er;
853 if (is_external_interrupt(exit_int_info))
854 push_irq(vcpu, exit_int_info & SVM_EVTINJ_VEC_MASK);
856 spin_lock(&vcpu->kvm->lock);
858 fault_address = vcpu->svm->vmcb->control.exit_info_2;
859 error_code = vcpu->svm->vmcb->control.exit_info_1;
860 if (!vcpu->mmu.page_fault(vcpu, fault_address, error_code)) {
861 spin_unlock(&vcpu->kvm->lock);
864 er = emulate_instruction(vcpu, kvm_run, fault_address, error_code);
865 spin_unlock(&vcpu->kvm->lock);
870 case EMULATE_DO_MMIO:
871 ++kvm_stat.mmio_exits;
872 kvm_run->exit_reason = KVM_EXIT_MMIO;
875 vcpu_printf(vcpu, "%s: emulate fail\n", __FUNCTION__);
881 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
885 static int io_get_override(struct kvm_vcpu *vcpu,
886 struct vmcb_seg **seg,
889 u8 inst[MAX_INST_SIZE];
894 rip = vcpu->svm->vmcb->save.rip;
895 ins_length = vcpu->svm->next_rip - rip;
896 rip += vcpu->svm->vmcb->save.cs.base;
898 if (ins_length > MAX_INST_SIZE)
900 "%s: inst length err, cs base 0x%llx rip 0x%llx "
901 "next rip 0x%llx ins_length %u\n",
903 vcpu->svm->vmcb->save.cs.base,
904 vcpu->svm->vmcb->save.rip,
905 vcpu->svm->vmcb->control.exit_info_2,
908 if (kvm_read_guest(vcpu, rip, ins_length, inst) != ins_length)
914 for (i = 0; i < ins_length; i++)
925 *seg = &vcpu->svm->vmcb->save.cs;
928 *seg = &vcpu->svm->vmcb->save.ss;
931 *seg = &vcpu->svm->vmcb->save.ds;
934 *seg = &vcpu->svm->vmcb->save.es;
937 *seg = &vcpu->svm->vmcb->save.fs;
940 *seg = &vcpu->svm->vmcb->save.gs;
945 printk(KERN_DEBUG "%s: unexpected\n", __FUNCTION__);
949 static unsigned long io_adress(struct kvm_vcpu *vcpu, int ins, u64 *address)
951 unsigned long addr_mask;
953 struct vmcb_seg *seg;
955 struct vmcb_save_area *save_area = &vcpu->svm->vmcb->save;
956 u16 cs_attrib = save_area->cs.attrib;
957 unsigned addr_size = get_addr_size(vcpu);
959 if (!io_get_override(vcpu, &seg, &addr_override))
963 addr_size = (addr_size == 2) ? 4: (addr_size >> 1);
966 reg = &vcpu->regs[VCPU_REGS_RDI];
967 seg = &vcpu->svm->vmcb->save.es;
969 reg = &vcpu->regs[VCPU_REGS_RSI];
970 seg = (seg) ? seg : &vcpu->svm->vmcb->save.ds;
973 addr_mask = ~0ULL >> (64 - (addr_size * 8));
975 if ((cs_attrib & SVM_SELECTOR_L_MASK) &&
976 !(vcpu->svm->vmcb->save.rflags & X86_EFLAGS_VM)) {
977 *address = (*reg & addr_mask);
981 if (!(seg->attrib & SVM_SELECTOR_P_SHIFT)) {
982 svm_inject_gp(vcpu, 0);
986 *address = (*reg & addr_mask) + seg->base;
990 static int io_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
992 u32 io_info = vcpu->svm->vmcb->control.exit_info_1; //address size bug?
993 int _in = io_info & SVM_IOIO_TYPE_MASK;
997 vcpu->svm->next_rip = vcpu->svm->vmcb->control.exit_info_2;
999 kvm_run->exit_reason = KVM_EXIT_IO;
1000 kvm_run->io.port = io_info >> 16;
1001 kvm_run->io.direction = (_in) ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
1002 kvm_run->io.size = ((io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT);
1003 kvm_run->io.string = (io_info & SVM_IOIO_STR_MASK) != 0;
1004 kvm_run->io.rep = (io_info & SVM_IOIO_REP_MASK) != 0;
1006 if (kvm_run->io.string) {
1009 addr_mask = io_adress(vcpu, _in, &kvm_run->io.address);
1011 printk(KERN_DEBUG "%s: get io address failed\n", __FUNCTION__);
1015 if (kvm_run->io.rep) {
1016 kvm_run->io.count = vcpu->regs[VCPU_REGS_RCX] & addr_mask;
1017 kvm_run->io.string_down = (vcpu->svm->vmcb->save.rflags
1018 & X86_EFLAGS_DF) != 0;
1021 kvm_run->io.value = vcpu->svm->vmcb->save.rax;
1027 static int nop_on_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1032 static int halt_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1034 vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 1;
1035 skip_emulated_instruction(vcpu);
1036 if (vcpu->irq_summary)
1039 kvm_run->exit_reason = KVM_EXIT_HLT;
1040 ++kvm_stat.halt_exits;
1044 static int invalid_op_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1050 static int task_switch_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1052 printk(KERN_DEBUG "%s: task swiche is unsupported\n", __FUNCTION__);
1053 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
1057 static int cpuid_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1059 vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 2;
1060 kvm_run->exit_reason = KVM_EXIT_CPUID;
1064 static int emulate_on_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1066 if (emulate_instruction(vcpu, 0, 0, 0) != EMULATE_DONE)
1067 printk(KERN_ERR "%s: failed\n", __FUNCTION__);
1071 static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data)
1074 case MSR_IA32_TIME_STAMP_COUNTER: {
1078 *data = vcpu->svm->vmcb->control.tsc_offset + tsc;
1082 *data = vcpu->svm->vmcb->save.star;
1084 #ifdef CONFIG_X86_64
1086 *data = vcpu->svm->vmcb->save.lstar;
1089 *data = vcpu->svm->vmcb->save.cstar;
1091 case MSR_KERNEL_GS_BASE:
1092 *data = vcpu->svm->vmcb->save.kernel_gs_base;
1094 case MSR_SYSCALL_MASK:
1095 *data = vcpu->svm->vmcb->save.sfmask;
1098 case MSR_IA32_SYSENTER_CS:
1099 *data = vcpu->svm->vmcb->save.sysenter_cs;
1101 case MSR_IA32_SYSENTER_EIP:
1102 *data = vcpu->svm->vmcb->save.sysenter_eip;
1104 case MSR_IA32_SYSENTER_ESP:
1105 *data = vcpu->svm->vmcb->save.sysenter_esp;
1108 return kvm_get_msr_common(vcpu, ecx, data);
1113 static int rdmsr_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1115 u32 ecx = vcpu->regs[VCPU_REGS_RCX];
1118 if (svm_get_msr(vcpu, ecx, &data))
1119 svm_inject_gp(vcpu, 0);
1121 vcpu->svm->vmcb->save.rax = data & 0xffffffff;
1122 vcpu->regs[VCPU_REGS_RDX] = data >> 32;
1123 vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 2;
1124 skip_emulated_instruction(vcpu);
1129 static int svm_set_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 data)
1132 case MSR_IA32_TIME_STAMP_COUNTER: {
1136 vcpu->svm->vmcb->control.tsc_offset = data - tsc;
1140 vcpu->svm->vmcb->save.star = data;
1142 #ifdef CONFIG_X86_64_
1144 vcpu->svm->vmcb->save.lstar = data;
1147 vcpu->svm->vmcb->save.cstar = data;
1149 case MSR_KERNEL_GS_BASE:
1150 vcpu->svm->vmcb->save.kernel_gs_base = data;
1152 case MSR_SYSCALL_MASK:
1153 vcpu->svm->vmcb->save.sfmask = data;
1156 case MSR_IA32_SYSENTER_CS:
1157 vcpu->svm->vmcb->save.sysenter_cs = data;
1159 case MSR_IA32_SYSENTER_EIP:
1160 vcpu->svm->vmcb->save.sysenter_eip = data;
1162 case MSR_IA32_SYSENTER_ESP:
1163 vcpu->svm->vmcb->save.sysenter_esp = data;
1166 return kvm_set_msr_common(vcpu, ecx, data);
1171 static int wrmsr_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1173 u32 ecx = vcpu->regs[VCPU_REGS_RCX];
1174 u64 data = (vcpu->svm->vmcb->save.rax & -1u)
1175 | ((u64)(vcpu->regs[VCPU_REGS_RDX] & -1u) << 32);
1176 vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 2;
1177 if (svm_set_msr(vcpu, ecx, data))
1178 svm_inject_gp(vcpu, 0);
1180 skip_emulated_instruction(vcpu);
1184 static int msr_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1186 if (vcpu->svm->vmcb->control.exit_info_1)
1187 return wrmsr_interception(vcpu, kvm_run);
1189 return rdmsr_interception(vcpu, kvm_run);
1192 static int interrupt_window_interception(struct kvm_vcpu *vcpu,
1193 struct kvm_run *kvm_run)
1196 * If the user space waits to inject interrupts, exit as soon as
1199 if (kvm_run->request_interrupt_window &&
1200 !vcpu->irq_summary &&
1201 (vcpu->svm->vmcb->save.rflags & X86_EFLAGS_IF)) {
1202 ++kvm_stat.irq_window_exits;
1203 kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
1210 static int (*svm_exit_handlers[])(struct kvm_vcpu *vcpu,
1211 struct kvm_run *kvm_run) = {
1212 [SVM_EXIT_READ_CR0] = emulate_on_interception,
1213 [SVM_EXIT_READ_CR3] = emulate_on_interception,
1214 [SVM_EXIT_READ_CR4] = emulate_on_interception,
1216 [SVM_EXIT_WRITE_CR0] = emulate_on_interception,
1217 [SVM_EXIT_WRITE_CR3] = emulate_on_interception,
1218 [SVM_EXIT_WRITE_CR4] = emulate_on_interception,
1219 [SVM_EXIT_READ_DR0] = emulate_on_interception,
1220 [SVM_EXIT_READ_DR1] = emulate_on_interception,
1221 [SVM_EXIT_READ_DR2] = emulate_on_interception,
1222 [SVM_EXIT_READ_DR3] = emulate_on_interception,
1223 [SVM_EXIT_WRITE_DR0] = emulate_on_interception,
1224 [SVM_EXIT_WRITE_DR1] = emulate_on_interception,
1225 [SVM_EXIT_WRITE_DR2] = emulate_on_interception,
1226 [SVM_EXIT_WRITE_DR3] = emulate_on_interception,
1227 [SVM_EXIT_WRITE_DR5] = emulate_on_interception,
1228 [SVM_EXIT_WRITE_DR7] = emulate_on_interception,
1229 [SVM_EXIT_EXCP_BASE + PF_VECTOR] = pf_interception,
1230 [SVM_EXIT_INTR] = nop_on_interception,
1231 [SVM_EXIT_NMI] = nop_on_interception,
1232 [SVM_EXIT_SMI] = nop_on_interception,
1233 [SVM_EXIT_INIT] = nop_on_interception,
1234 [SVM_EXIT_VINTR] = interrupt_window_interception,
1235 /* [SVM_EXIT_CR0_SEL_WRITE] = emulate_on_interception, */
1236 [SVM_EXIT_CPUID] = cpuid_interception,
1237 [SVM_EXIT_HLT] = halt_interception,
1238 [SVM_EXIT_INVLPG] = emulate_on_interception,
1239 [SVM_EXIT_INVLPGA] = invalid_op_interception,
1240 [SVM_EXIT_IOIO] = io_interception,
1241 [SVM_EXIT_MSR] = msr_interception,
1242 [SVM_EXIT_TASK_SWITCH] = task_switch_interception,
1243 [SVM_EXIT_VMRUN] = invalid_op_interception,
1244 [SVM_EXIT_VMMCALL] = invalid_op_interception,
1245 [SVM_EXIT_VMLOAD] = invalid_op_interception,
1246 [SVM_EXIT_VMSAVE] = invalid_op_interception,
1247 [SVM_EXIT_STGI] = invalid_op_interception,
1248 [SVM_EXIT_CLGI] = invalid_op_interception,
1249 [SVM_EXIT_SKINIT] = invalid_op_interception,
1253 static int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1255 u32 exit_code = vcpu->svm->vmcb->control.exit_code;
1257 kvm_run->exit_type = KVM_EXIT_TYPE_VM_EXIT;
1259 if (is_external_interrupt(vcpu->svm->vmcb->control.exit_int_info) &&
1260 exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR)
1261 printk(KERN_ERR "%s: unexpected exit_ini_info 0x%x "
1263 __FUNCTION__, vcpu->svm->vmcb->control.exit_int_info,
1266 if (exit_code >= sizeof(svm_exit_handlers) / sizeof(*svm_exit_handlers)
1267 || svm_exit_handlers[exit_code] == 0) {
1268 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
1269 printk(KERN_ERR "%s: 0x%x @ 0x%llx cr0 0x%lx rflags 0x%llx\n",
1272 vcpu->svm->vmcb->save.rip,
1274 vcpu->svm->vmcb->save.rflags);
1278 return svm_exit_handlers[exit_code](vcpu, kvm_run);
1281 static void reload_tss(struct kvm_vcpu *vcpu)
1283 int cpu = raw_smp_processor_id();
1285 struct svm_cpu_data *svm_data = per_cpu(svm_data, cpu);
1286 svm_data->tss_desc->type = 9; //available 32/64-bit TSS
1290 static void pre_svm_run(struct kvm_vcpu *vcpu)
1292 int cpu = raw_smp_processor_id();
1294 struct svm_cpu_data *svm_data = per_cpu(svm_data, cpu);
1296 vcpu->svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;
1297 if (vcpu->cpu != cpu ||
1298 vcpu->svm->asid_generation != svm_data->asid_generation)
1299 new_asid(vcpu, svm_data);
1303 static inline void kvm_do_inject_irq(struct kvm_vcpu *vcpu)
1305 struct vmcb_control_area *control;
1307 control = &vcpu->svm->vmcb->control;
1308 control->int_vector = pop_irq(vcpu);
1309 control->int_ctl &= ~V_INTR_PRIO_MASK;
1310 control->int_ctl |= V_IRQ_MASK |
1311 ((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT);
1314 static void kvm_reput_irq(struct kvm_vcpu *vcpu)
1316 struct vmcb_control_area *control = &vcpu->svm->vmcb->control;
1318 if (control->int_ctl & V_IRQ_MASK) {
1319 control->int_ctl &= ~V_IRQ_MASK;
1320 push_irq(vcpu, control->int_vector);
1323 vcpu->interrupt_window_open =
1324 !(control->int_state & SVM_INTERRUPT_SHADOW_MASK);
1327 static void do_interrupt_requests(struct kvm_vcpu *vcpu,
1328 struct kvm_run *kvm_run)
1330 struct vmcb_control_area *control = &vcpu->svm->vmcb->control;
1332 vcpu->interrupt_window_open =
1333 (!(control->int_state & SVM_INTERRUPT_SHADOW_MASK) &&
1334 (vcpu->svm->vmcb->save.rflags & X86_EFLAGS_IF));
1336 if (vcpu->interrupt_window_open && vcpu->irq_summary)
1338 * If interrupts enabled, and not blocked by sti or mov ss. Good.
1340 kvm_do_inject_irq(vcpu);
1343 * Interrupts blocked. Wait for unblock.
1345 if (!vcpu->interrupt_window_open &&
1346 (vcpu->irq_summary || kvm_run->request_interrupt_window)) {
1347 control->intercept |= 1ULL << INTERCEPT_VINTR;
1349 control->intercept &= ~(1ULL << INTERCEPT_VINTR);
1352 static void post_kvm_run_save(struct kvm_vcpu *vcpu,
1353 struct kvm_run *kvm_run)
1355 kvm_run->ready_for_interrupt_injection = (vcpu->interrupt_window_open &&
1356 vcpu->irq_summary == 0);
1357 kvm_run->if_flag = (vcpu->svm->vmcb->save.rflags & X86_EFLAGS_IF) != 0;
1358 kvm_run->cr8 = vcpu->cr8;
1359 kvm_run->apic_base = vcpu->apic_base;
1363 * Check if userspace requested an interrupt window, and that the
1364 * interrupt window is open.
1366 * No need to exit to userspace if we already have an interrupt queued.
1368 static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
1369 struct kvm_run *kvm_run)
1371 return (!vcpu->irq_summary &&
1372 kvm_run->request_interrupt_window &&
1373 vcpu->interrupt_window_open &&
1374 (vcpu->svm->vmcb->save.rflags & X86_EFLAGS_IF));
1377 static void save_db_regs(unsigned long *db_regs)
1379 asm volatile ("mov %%dr0, %0" : "=r"(db_regs[0]));
1380 asm volatile ("mov %%dr1, %0" : "=r"(db_regs[1]));
1381 asm volatile ("mov %%dr2, %0" : "=r"(db_regs[2]));
1382 asm volatile ("mov %%dr3, %0" : "=r"(db_regs[3]));
1385 static void load_db_regs(unsigned long *db_regs)
1387 asm volatile ("mov %0, %%dr0" : : "r"(db_regs[0]));
1388 asm volatile ("mov %0, %%dr1" : : "r"(db_regs[1]));
1389 asm volatile ("mov %0, %%dr2" : : "r"(db_regs[2]));
1390 asm volatile ("mov %0, %%dr3" : : "r"(db_regs[3]));
1393 static int svm_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1400 do_interrupt_requests(vcpu, kvm_run);
1406 save_host_msrs(vcpu);
1407 fs_selector = read_fs();
1408 gs_selector = read_gs();
1409 ldt_selector = read_ldt();
1410 vcpu->svm->host_cr2 = kvm_read_cr2();
1411 vcpu->svm->host_dr6 = read_dr6();
1412 vcpu->svm->host_dr7 = read_dr7();
1413 vcpu->svm->vmcb->save.cr2 = vcpu->cr2;
1415 if (vcpu->svm->vmcb->save.dr7 & 0xff) {
1417 save_db_regs(vcpu->svm->host_db_regs);
1418 load_db_regs(vcpu->svm->db_regs);
1421 fx_save(vcpu->host_fx_image);
1422 fx_restore(vcpu->guest_fx_image);
1425 #ifdef CONFIG_X86_64
1426 "push %%rbx; push %%rcx; push %%rdx;"
1427 "push %%rsi; push %%rdi; push %%rbp;"
1428 "push %%r8; push %%r9; push %%r10; push %%r11;"
1429 "push %%r12; push %%r13; push %%r14; push %%r15;"
1431 "push %%ebx; push %%ecx; push %%edx;"
1432 "push %%esi; push %%edi; push %%ebp;"
1435 #ifdef CONFIG_X86_64
1436 "mov %c[rbx](%[vcpu]), %%rbx \n\t"
1437 "mov %c[rcx](%[vcpu]), %%rcx \n\t"
1438 "mov %c[rdx](%[vcpu]), %%rdx \n\t"
1439 "mov %c[rsi](%[vcpu]), %%rsi \n\t"
1440 "mov %c[rdi](%[vcpu]), %%rdi \n\t"
1441 "mov %c[rbp](%[vcpu]), %%rbp \n\t"
1442 "mov %c[r8](%[vcpu]), %%r8 \n\t"
1443 "mov %c[r9](%[vcpu]), %%r9 \n\t"
1444 "mov %c[r10](%[vcpu]), %%r10 \n\t"
1445 "mov %c[r11](%[vcpu]), %%r11 \n\t"
1446 "mov %c[r12](%[vcpu]), %%r12 \n\t"
1447 "mov %c[r13](%[vcpu]), %%r13 \n\t"
1448 "mov %c[r14](%[vcpu]), %%r14 \n\t"
1449 "mov %c[r15](%[vcpu]), %%r15 \n\t"
1451 "mov %c[rbx](%[vcpu]), %%ebx \n\t"
1452 "mov %c[rcx](%[vcpu]), %%ecx \n\t"
1453 "mov %c[rdx](%[vcpu]), %%edx \n\t"
1454 "mov %c[rsi](%[vcpu]), %%esi \n\t"
1455 "mov %c[rdi](%[vcpu]), %%edi \n\t"
1456 "mov %c[rbp](%[vcpu]), %%ebp \n\t"
1459 #ifdef CONFIG_X86_64
1460 /* Enter guest mode */
1462 "mov %c[svm](%[vcpu]), %%rax \n\t"
1463 "mov %c[vmcb](%%rax), %%rax \n\t"
1469 /* Enter guest mode */
1471 "mov %c[svm](%[vcpu]), %%eax \n\t"
1472 "mov %c[vmcb](%%eax), %%eax \n\t"
1479 /* Save guest registers, load host registers */
1480 #ifdef CONFIG_X86_64
1481 "mov %%rbx, %c[rbx](%[vcpu]) \n\t"
1482 "mov %%rcx, %c[rcx](%[vcpu]) \n\t"
1483 "mov %%rdx, %c[rdx](%[vcpu]) \n\t"
1484 "mov %%rsi, %c[rsi](%[vcpu]) \n\t"
1485 "mov %%rdi, %c[rdi](%[vcpu]) \n\t"
1486 "mov %%rbp, %c[rbp](%[vcpu]) \n\t"
1487 "mov %%r8, %c[r8](%[vcpu]) \n\t"
1488 "mov %%r9, %c[r9](%[vcpu]) \n\t"
1489 "mov %%r10, %c[r10](%[vcpu]) \n\t"
1490 "mov %%r11, %c[r11](%[vcpu]) \n\t"
1491 "mov %%r12, %c[r12](%[vcpu]) \n\t"
1492 "mov %%r13, %c[r13](%[vcpu]) \n\t"
1493 "mov %%r14, %c[r14](%[vcpu]) \n\t"
1494 "mov %%r15, %c[r15](%[vcpu]) \n\t"
1496 "pop %%r15; pop %%r14; pop %%r13; pop %%r12;"
1497 "pop %%r11; pop %%r10; pop %%r9; pop %%r8;"
1498 "pop %%rbp; pop %%rdi; pop %%rsi;"
1499 "pop %%rdx; pop %%rcx; pop %%rbx; \n\t"
1501 "mov %%ebx, %c[rbx](%[vcpu]) \n\t"
1502 "mov %%ecx, %c[rcx](%[vcpu]) \n\t"
1503 "mov %%edx, %c[rdx](%[vcpu]) \n\t"
1504 "mov %%esi, %c[rsi](%[vcpu]) \n\t"
1505 "mov %%edi, %c[rdi](%[vcpu]) \n\t"
1506 "mov %%ebp, %c[rbp](%[vcpu]) \n\t"
1508 "pop %%ebp; pop %%edi; pop %%esi;"
1509 "pop %%edx; pop %%ecx; pop %%ebx; \n\t"
1513 [svm]"i"(offsetof(struct kvm_vcpu, svm)),
1514 [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)),
1515 [rbx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RBX])),
1516 [rcx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RCX])),
1517 [rdx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RDX])),
1518 [rsi]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RSI])),
1519 [rdi]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RDI])),
1520 [rbp]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RBP]))
1521 #ifdef CONFIG_X86_64
1522 ,[r8 ]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R8 ])),
1523 [r9 ]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R9 ])),
1524 [r10]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R10])),
1525 [r11]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R11])),
1526 [r12]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R12])),
1527 [r13]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R13])),
1528 [r14]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R14])),
1529 [r15]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_R15]))
1533 fx_save(vcpu->guest_fx_image);
1534 fx_restore(vcpu->host_fx_image);
1536 if ((vcpu->svm->vmcb->save.dr7 & 0xff))
1537 load_db_regs(vcpu->svm->host_db_regs);
1539 vcpu->cr2 = vcpu->svm->vmcb->save.cr2;
1541 write_dr6(vcpu->svm->host_dr6);
1542 write_dr7(vcpu->svm->host_dr7);
1543 kvm_write_cr2(vcpu->svm->host_cr2);
1545 load_fs(fs_selector);
1546 load_gs(gs_selector);
1547 load_ldt(ldt_selector);
1548 load_host_msrs(vcpu);
1554 kvm_reput_irq(vcpu);
1556 vcpu->svm->next_rip = 0;
1558 if (vcpu->svm->vmcb->control.exit_code == SVM_EXIT_ERR) {
1559 kvm_run->exit_type = KVM_EXIT_TYPE_FAIL_ENTRY;
1560 kvm_run->exit_reason = vcpu->svm->vmcb->control.exit_code;
1561 post_kvm_run_save(vcpu, kvm_run);
1565 if (handle_exit(vcpu, kvm_run)) {
1566 if (signal_pending(current)) {
1567 ++kvm_stat.signal_exits;
1568 post_kvm_run_save(vcpu, kvm_run);
1572 if (dm_request_for_irq_injection(vcpu, kvm_run)) {
1573 ++kvm_stat.request_irq_exits;
1574 post_kvm_run_save(vcpu, kvm_run);
1580 post_kvm_run_save(vcpu, kvm_run);
1584 static void svm_flush_tlb(struct kvm_vcpu *vcpu)
1586 force_new_asid(vcpu);
1589 static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
1591 vcpu->svm->vmcb->save.cr3 = root;
1592 force_new_asid(vcpu);
1595 static void svm_inject_page_fault(struct kvm_vcpu *vcpu,
1599 uint32_t exit_int_info = vcpu->svm->vmcb->control.exit_int_info;
1601 ++kvm_stat.pf_guest;
1603 if (is_page_fault(exit_int_info)) {
1605 vcpu->svm->vmcb->control.event_inj_err = 0;
1606 vcpu->svm->vmcb->control.event_inj = SVM_EVTINJ_VALID |
1607 SVM_EVTINJ_VALID_ERR |
1608 SVM_EVTINJ_TYPE_EXEPT |
1613 vcpu->svm->vmcb->save.cr2 = addr;
1614 vcpu->svm->vmcb->control.event_inj = SVM_EVTINJ_VALID |
1615 SVM_EVTINJ_VALID_ERR |
1616 SVM_EVTINJ_TYPE_EXEPT |
1618 vcpu->svm->vmcb->control.event_inj_err = err_code;
1622 static int is_disabled(void)
1627 static struct kvm_arch_ops svm_arch_ops = {
1628 .cpu_has_kvm_support = has_svm,
1629 .disabled_by_bios = is_disabled,
1630 .hardware_setup = svm_hardware_setup,
1631 .hardware_unsetup = svm_hardware_unsetup,
1632 .hardware_enable = svm_hardware_enable,
1633 .hardware_disable = svm_hardware_disable,
1635 .vcpu_create = svm_create_vcpu,
1636 .vcpu_free = svm_free_vcpu,
1638 .vcpu_load = svm_vcpu_load,
1639 .vcpu_put = svm_vcpu_put,
1641 .set_guest_debug = svm_guest_debug,
1642 .get_msr = svm_get_msr,
1643 .set_msr = svm_set_msr,
1644 .get_segment_base = svm_get_segment_base,
1645 .get_segment = svm_get_segment,
1646 .set_segment = svm_set_segment,
1647 .get_cs_db_l_bits = svm_get_cs_db_l_bits,
1648 .set_cr0 = svm_set_cr0,
1649 .set_cr0_no_modeswitch = svm_set_cr0,
1650 .set_cr3 = svm_set_cr3,
1651 .set_cr4 = svm_set_cr4,
1652 .set_efer = svm_set_efer,
1653 .get_idt = svm_get_idt,
1654 .set_idt = svm_set_idt,
1655 .get_gdt = svm_get_gdt,
1656 .set_gdt = svm_set_gdt,
1657 .get_dr = svm_get_dr,
1658 .set_dr = svm_set_dr,
1659 .cache_regs = svm_cache_regs,
1660 .decache_regs = svm_decache_regs,
1661 .get_rflags = svm_get_rflags,
1662 .set_rflags = svm_set_rflags,
1664 .invlpg = svm_invlpg,
1665 .tlb_flush = svm_flush_tlb,
1666 .inject_page_fault = svm_inject_page_fault,
1668 .inject_gp = svm_inject_gp,
1670 .run = svm_vcpu_run,
1671 .skip_emulated_instruction = skip_emulated_instruction,
1672 .vcpu_setup = svm_vcpu_setup,
1675 static int __init svm_init(void)
1677 return kvm_init_arch(&svm_arch_ops, THIS_MODULE);
1680 static void __exit svm_exit(void)
1685 module_init(svm_init)
1686 module_exit(svm_exit)