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 unsigned long rsp; 38 39 u16 fs_sel, gs_sel, ldt_sel; 40 #ifdef CONFIG_X86_64 41 u16 ds_sel, es_sel; 42 #endif 43 }; 44 45 struct vmcs_controls_shadow { 46 u32 vm_entry; 47 u32 vm_exit; 48 u32 pin; 49 u32 exec; 50 u32 secondary_exec; 51 }; 52 53 /* 54 * Track a VMCS that may be loaded on a certain CPU. If it is (cpu!=-1), also 55 * remember whether it was VMLAUNCHed, and maintain a linked list of all VMCSs 56 * loaded on this CPU (so we can clear them if the CPU goes down). 57 */ 58 struct loaded_vmcs { 59 struct vmcs *vmcs; 60 struct vmcs *shadow_vmcs; 61 int cpu; 62 bool launched; 63 bool nmi_known_unmasked; 64 bool hv_timer_soft_disabled; 65 /* Support for vnmi-less CPUs */ 66 int soft_vnmi_blocked; 67 ktime_t entry_time; 68 s64 vnmi_blocked_time; 69 unsigned long *msr_bitmap; 70 struct list_head loaded_vmcss_on_cpu_link; 71 struct vmcs_host_state host_state; 72 struct vmcs_controls_shadow controls_shadow; 73 }; 74 75 static inline bool is_exception_n(u32 intr_info, u8 vector) 76 { 77 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | 78 INTR_INFO_VALID_MASK)) == 79 (INTR_TYPE_HARD_EXCEPTION | vector | INTR_INFO_VALID_MASK); 80 } 81 82 static inline bool is_debug(u32 intr_info) 83 { 84 return is_exception_n(intr_info, DB_VECTOR); 85 } 86 87 static inline bool is_breakpoint(u32 intr_info) 88 { 89 return is_exception_n(intr_info, BP_VECTOR); 90 } 91 92 static inline bool is_page_fault(u32 intr_info) 93 { 94 return is_exception_n(intr_info, PF_VECTOR); 95 } 96 97 static inline bool is_invalid_opcode(u32 intr_info) 98 { 99 return is_exception_n(intr_info, UD_VECTOR); 100 } 101 102 static inline bool is_gp_fault(u32 intr_info) 103 { 104 return is_exception_n(intr_info, GP_VECTOR); 105 } 106 107 static inline bool is_machine_check(u32 intr_info) 108 { 109 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | 110 INTR_INFO_VALID_MASK)) == 111 (INTR_TYPE_HARD_EXCEPTION | MC_VECTOR | INTR_INFO_VALID_MASK); 112 } 113 114 /* Undocumented: icebp/int1 */ 115 static inline bool is_icebp(u32 intr_info) 116 { 117 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK)) 118 == (INTR_TYPE_PRIV_SW_EXCEPTION | INTR_INFO_VALID_MASK); 119 } 120 121 static inline bool is_nmi(u32 intr_info) 122 { 123 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK)) 124 == (INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK); 125 } 126 127 static inline bool is_external_intr(u32 intr_info) 128 { 129 return (intr_info & (INTR_INFO_VALID_MASK | INTR_INFO_INTR_TYPE_MASK)) 130 == (INTR_INFO_VALID_MASK | INTR_TYPE_EXT_INTR); 131 } 132 133 enum vmcs_field_width { 134 VMCS_FIELD_WIDTH_U16 = 0, 135 VMCS_FIELD_WIDTH_U64 = 1, 136 VMCS_FIELD_WIDTH_U32 = 2, 137 VMCS_FIELD_WIDTH_NATURAL_WIDTH = 3 138 }; 139 140 static inline int vmcs_field_width(unsigned long field) 141 { 142 if (0x1 & field) /* the *_HIGH fields are all 32 bit */ 143 return VMCS_FIELD_WIDTH_U32; 144 return (field >> 13) & 0x3; 145 } 146 147 static inline int vmcs_field_readonly(unsigned long field) 148 { 149 return (((field >> 10) & 0x3) == 1); 150 } 151 152 #endif /* __KVM_X86_VMX_VMCS_H */ 153