drivers/kvm/x86.h

   1 #/*
   2  * Kernel-based Virtual Machine driver for Linux
   3  *
   4  * This header defines architecture specific interfaces, x86 version
   5  *
   6  * This work is licensed under the terms of the GNU GPL, version 2.  See
   7  * the COPYING file in the top-level directory.
   8  *
   9  */
  10
  11 #ifndef KVM_X86_H
  12 #define KVM_X86_H
  13
  14 #include "kvm.h"
  15
  16 #include <linux/types.h>
  17 #include <linux/mm.h>
  18
  19 #include <linux/kvm.h>
  20 #include <linux/kvm_para.h>
  21
  22 extern spinlock_t kvm_lock;
  23 extern struct list_head vm_list;
  24
  25 struct kvm_vcpu {
  26         KVM_VCPU_COMM;
  27         u64 host_tsc;
  28         int interrupt_window_open;
  29         unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
  30         DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
  31         unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
  32         unsigned long rip;      /* needs vcpu_load_rsp_rip() */
  33
  34         unsigned long cr0;
  35         unsigned long cr2;
  36         unsigned long cr3;
  37         unsigned long cr4;
  38         unsigned long cr8;
  39         u64 pdptrs[4]; /* pae */
  40         u64 shadow_efer;
  41         u64 apic_base;
  42         struct kvm_lapic *apic;    /* kernel irqchip context */
  43 #define VCPU_MP_STATE_RUNNABLE          0
  44 #define VCPU_MP_STATE_UNINITIALIZED     1
  45 #define VCPU_MP_STATE_INIT_RECEIVED     2
  46 #define VCPU_MP_STATE_SIPI_RECEIVED     3
  47 #define VCPU_MP_STATE_HALTED            4
  48         int mp_state;
  49         int sipi_vector;
  50         u64 ia32_misc_enable_msr;
  51
  52         struct kvm_mmu mmu;
  53
  54         struct kvm_mmu_memory_cache mmu_pte_chain_cache;
  55         struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
  56         struct kvm_mmu_memory_cache mmu_page_cache;
  57         struct kvm_mmu_memory_cache mmu_page_header_cache;
  58
  59         gfn_t last_pt_write_gfn;
  60         int   last_pt_write_count;
  61         u64  *last_pte_updated;
  62
  63
  64         struct i387_fxsave_struct host_fx_image;
  65         struct i387_fxsave_struct guest_fx_image;
  66
  67         gva_t mmio_fault_cr2;
  68         struct kvm_pio_request pio;
  69         void *pio_data;
  70
  71         struct {
  72                 int active;
  73                 u8 save_iopl;
  74                 struct kvm_save_segment {
  75                         u16 selector;
  76                         unsigned long base;
  77                         u32 limit;
  78                         u32 ar;
  79                 } tr, es, ds, fs, gs;
  80         } rmode;
  81         int halt_request; /* real mode on Intel only */
  82
  83         int cpuid_nent;
  84         struct kvm_cpuid_entry cpuid_entries[KVM_MAX_CPUID_ENTRIES];
  85
  86         /* emulate context */
  87
  88         struct x86_emulate_ctxt emulate_ctxt;
  89 };
  90
  91 extern struct kvm_x86_ops *kvm_x86_ops;
  92
  93 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
  94
  95 static inline void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)
  96 {
  97         if (unlikely(vcpu->kvm->n_free_mmu_pages < KVM_MIN_FREE_MMU_PAGES))
  98                 __kvm_mmu_free_some_pages(vcpu);
  99 }
 100
 101 static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu)
 102 {
 103         if (likely(vcpu->mmu.root_hpa != INVALID_PAGE))
 104                 return 0;
 105
 106         return kvm_mmu_load(vcpu);
 107 }
 108
 109 static inline int is_long_mode(struct kvm_vcpu *vcpu)
 110 {
 111 #ifdef CONFIG_X86_64
 112         return vcpu->shadow_efer & EFER_LME;
 113 #else
 114         return 0;
 115 #endif
 116 }
 117
 118 static inline int is_pae(struct kvm_vcpu *vcpu)
 119 {
 120         return vcpu->cr4 & X86_CR4_PAE;
 121 }
 122
 123 static inline int is_pse(struct kvm_vcpu *vcpu)
 124 {
 125         return vcpu->cr4 & X86_CR4_PSE;
 126 }
 127
 128 static inline int is_paging(struct kvm_vcpu *vcpu)
 129 {
 130         return vcpu->cr0 & X86_CR0_PG;
 131 }
 132
 133 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
 134 int complete_pio(struct kvm_vcpu *vcpu);
 135 #endif