arch/x86/kvm/vmx/vmcs.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __KVM_X86_VMX_VMCS_H
   3 #define __KVM_X86_VMX_VMCS_H
   4
   5 #include <linux/ktime.h>
   6 #include <linux/list.h>
   7 #include <linux/nospec.h>
   8
   9 #include <asm/kvm.h>
  10 #include <asm/vmx.h>
  11
  12 #include "capabilities.h"
  13
  14 struct vmcs_hdr {
  15         u32 revision_id:31;
  16         u32 shadow_vmcs:1;
  17 };
  18
  19 struct vmcs {
  20         struct vmcs_hdr hdr;
  21         u32 abort;
  22         char data[0];
  23 };
  24
  25 DECLARE_PER_CPU(struct vmcs *, current_vmcs);
  26
  27 /*
  28  * vmcs_host_state tracks registers that are loaded from the VMCS on VMEXIT
  29  * and whose values change infrequently, but are not constant.  I.e. this is
  30  * used as a write-through cache of the corresponding VMCS fields.
  31  */
  32 struct vmcs_host_state {
  33         unsigned long cr3;      /* May not match real cr3 */
  34         unsigned long cr4;      /* May not match real cr4 */
  35         unsigned long gs_base;
  36         unsigned long fs_base;
  37
  38         u16           fs_sel, gs_sel, ldt_sel;
  39 #ifdef CONFIG_X86_64
  40         u16           ds_sel, es_sel;
  41 #endif
  42 };
  43
  44 /*
  45  * Track a VMCS that may be loaded on a certain CPU. If it is (cpu!=-1), also
  46  * remember whether it was VMLAUNCHed, and maintain a linked list of all VMCSs
  47  * loaded on this CPU (so we can clear them if the CPU goes down).
  48  */
  49 struct loaded_vmcs {
  50         struct vmcs *vmcs;
  51         struct vmcs *shadow_vmcs;
  52         int cpu;
  53         bool launched;
  54         bool nmi_known_unmasked;
  55         bool hv_timer_armed;
  56         /* Support for vnmi-less CPUs */
  57         int soft_vnmi_blocked;
  58         ktime_t entry_time;
  59         s64 vnmi_blocked_time;
  60         unsigned long *msr_bitmap;
  61         struct list_head loaded_vmcss_on_cpu_link;
  62         struct vmcs_host_state host_state;
  63 };
  64
  65 static inline bool is_exception_n(u32 intr_info, u8 vector)
  66 {
  67         return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
  68                              INTR_INFO_VALID_MASK)) ==
  69                 (INTR_TYPE_HARD_EXCEPTION | vector | INTR_INFO_VALID_MASK);
  70 }
  71
  72 static inline bool is_debug(u32 intr_info)
  73 {
  74         return is_exception_n(intr_info, DB_VECTOR);
  75 }
  76
  77 static inline bool is_breakpoint(u32 intr_info)
  78 {
  79         return is_exception_n(intr_info, BP_VECTOR);
  80 }
  81
  82 static inline bool is_page_fault(u32 intr_info)
  83 {
  84         return is_exception_n(intr_info, PF_VECTOR);
  85 }
  86
  87 static inline bool is_invalid_opcode(u32 intr_info)
  88 {
  89         return is_exception_n(intr_info, UD_VECTOR);
  90 }
  91
  92 static inline bool is_gp_fault(u32 intr_info)
  93 {
  94         return is_exception_n(intr_info, GP_VECTOR);
  95 }
  96
  97 static inline bool is_machine_check(u32 intr_info)
  98 {
  99         return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
 100                              INTR_INFO_VALID_MASK)) ==
 101                 (INTR_TYPE_HARD_EXCEPTION | MC_VECTOR | INTR_INFO_VALID_MASK);
 102 }
 103
 104 /* Undocumented: icebp/int1 */
 105 static inline bool is_icebp(u32 intr_info)
 106 {
 107         return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK))
 108                 == (INTR_TYPE_PRIV_SW_EXCEPTION | INTR_INFO_VALID_MASK);
 109 }
 110
 111 static inline bool is_nmi(u32 intr_info)
 112 {
 113         return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK))
 114                 == (INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK);
 115 }
 116
 117 enum vmcs_field_width {
 118         VMCS_FIELD_WIDTH_U16 = 0,
 119         VMCS_FIELD_WIDTH_U64 = 1,
 120         VMCS_FIELD_WIDTH_U32 = 2,
 121         VMCS_FIELD_WIDTH_NATURAL_WIDTH = 3
 122 };
 123
 124 static inline int vmcs_field_width(unsigned long field)
 125 {
 126         if (0x1 & field)        /* the *_HIGH fields are all 32 bit */
 127                 return VMCS_FIELD_WIDTH_U32;
 128         return (field >> 13) & 0x3;
 129 }
 130
 131 static inline int vmcs_field_readonly(unsigned long field)
 132 {
 133         return (((field >> 10) & 0x3) == 1);
 134 }
 135
 136 #endif /* __KVM_X86_VMX_VMCS_H */