1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __KVM_X86_VMX_NESTED_H 3 #define __KVM_X86_VMX_NESTED_H 4 5 #include "kvm_cache_regs.h" 6 #include "vmcs12.h" 7 #include "vmx.h" 8 9 /* 10 * Status returned by nested_vmx_enter_non_root_mode(): 11 */ 12 enum nvmx_vmentry_status { 13 NVMX_VMENTRY_SUCCESS, /* Entered VMX non-root mode */ 14 NVMX_VMENTRY_VMFAIL, /* Consistency check VMFail */ 15 NVMX_VMENTRY_VMEXIT, /* Consistency check VMExit */ 16 NVMX_VMENTRY_KVM_INTERNAL_ERROR,/* KVM internal error */ 17 }; 18 19 void vmx_leave_nested(struct kvm_vcpu *vcpu); 20 void nested_vmx_setup_ctls_msrs(struct vmcs_config *vmcs_conf, u32 ept_caps); 21 void nested_vmx_hardware_unsetup(void); 22 __init int nested_vmx_hardware_setup(int (*exit_handlers[])(struct kvm_vcpu *)); 23 void nested_vmx_set_vmcs_shadowing_bitmap(void); 24 void nested_vmx_free_vcpu(struct kvm_vcpu *vcpu); 25 enum nvmx_vmentry_status nested_vmx_enter_non_root_mode(struct kvm_vcpu *vcpu, 26 bool from_vmentry); 27 bool nested_vmx_reflect_vmexit(struct kvm_vcpu *vcpu); 28 void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 vm_exit_reason, 29 u32 exit_intr_info, unsigned long exit_qualification); 30 void nested_sync_vmcs12_to_shadow(struct kvm_vcpu *vcpu); 31 int vmx_set_vmx_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); 32 int vmx_get_vmx_msr(struct nested_vmx_msrs *msrs, u32 msr_index, u64 *pdata); 33 int get_vmx_mem_address(struct kvm_vcpu *vcpu, unsigned long exit_qualification, 34 u32 vmx_instruction_info, bool wr, int len, gva_t *ret); 35 void nested_mark_vmcs12_pages_dirty(struct kvm_vcpu *vcpu); 36 bool nested_vmx_check_io_bitmaps(struct kvm_vcpu *vcpu, unsigned int port, 37 int size); 38 39 static inline struct vmcs12 *get_vmcs12(struct kvm_vcpu *vcpu) 40 { 41 return to_vmx(vcpu)->nested.cached_vmcs12; 42 } 43 44 static inline struct vmcs12 *get_shadow_vmcs12(struct kvm_vcpu *vcpu) 45 { 46 return to_vmx(vcpu)->nested.cached_shadow_vmcs12; 47 } 48 49 /* 50 * Note: the same condition is checked against the state provided by userspace 51 * in vmx_set_nested_state; if it is satisfied, the nested state must include 52 * the VMCS12. 53 */ 54 static inline int vmx_has_valid_vmcs12(struct kvm_vcpu *vcpu) 55 { 56 struct vcpu_vmx *vmx = to_vmx(vcpu); 57 58 /* 'hv_evmcs_vmptr' can also be EVMPTR_MAP_PENDING here */ 59 return vmx->nested.current_vmptr != -1ull || 60 vmx->nested.hv_evmcs_vmptr != EVMPTR_INVALID; 61 } 62 63 static inline u16 nested_get_vpid02(struct kvm_vcpu *vcpu) 64 { 65 struct vcpu_vmx *vmx = to_vmx(vcpu); 66 67 return vmx->nested.vpid02 ? vmx->nested.vpid02 : vmx->vpid; 68 } 69 70 static inline unsigned long nested_ept_get_eptp(struct kvm_vcpu *vcpu) 71 { 72 /* return the page table to be shadowed - in our case, EPT12 */ 73 return get_vmcs12(vcpu)->ept_pointer; 74 } 75 76 static inline bool nested_ept_ad_enabled(struct kvm_vcpu *vcpu) 77 { 78 return nested_ept_get_eptp(vcpu) & VMX_EPTP_AD_ENABLE_BIT; 79 } 80 81 /* 82 * Return the cr0/4 value that a nested guest would read. This is a combination 83 * of L1's "real" cr0 used to run the guest (guest_cr0), and the bits shadowed 84 * by the L1 hypervisor (cr0_read_shadow). KVM must emulate CPU behavior as 85 * the value+mask loaded into vmcs02 may not match the vmcs12 fields. 86 */ 87 static inline unsigned long nested_read_cr0(struct vmcs12 *fields) 88 { 89 return (fields->guest_cr0 & ~fields->cr0_guest_host_mask) | 90 (fields->cr0_read_shadow & fields->cr0_guest_host_mask); 91 } 92 static inline unsigned long nested_read_cr4(struct vmcs12 *fields) 93 { 94 return (fields->guest_cr4 & ~fields->cr4_guest_host_mask) | 95 (fields->cr4_read_shadow & fields->cr4_guest_host_mask); 96 } 97 98 static inline unsigned nested_cpu_vmx_misc_cr3_count(struct kvm_vcpu *vcpu) 99 { 100 return vmx_misc_cr3_count(to_vmx(vcpu)->nested.msrs.misc_low); 101 } 102 103 /* 104 * Do the virtual VMX capability MSRs specify that L1 can use VMWRITE 105 * to modify any valid field of the VMCS, or are the VM-exit 106 * information fields read-only? 107 */ 108 static inline bool nested_cpu_has_vmwrite_any_field(struct kvm_vcpu *vcpu) 109 { 110 return to_vmx(vcpu)->nested.msrs.misc_low & 111 MSR_IA32_VMX_MISC_VMWRITE_SHADOW_RO_FIELDS; 112 } 113 114 static inline bool nested_cpu_has_zero_length_injection(struct kvm_vcpu *vcpu) 115 { 116 return to_vmx(vcpu)->nested.msrs.misc_low & VMX_MISC_ZERO_LEN_INS; 117 } 118 119 static inline bool nested_cpu_supports_monitor_trap_flag(struct kvm_vcpu *vcpu) 120 { 121 return to_vmx(vcpu)->nested.msrs.procbased_ctls_high & 122 CPU_BASED_MONITOR_TRAP_FLAG; 123 } 124 125 static inline bool nested_cpu_has_vmx_shadow_vmcs(struct kvm_vcpu *vcpu) 126 { 127 return to_vmx(vcpu)->nested.msrs.secondary_ctls_high & 128 SECONDARY_EXEC_SHADOW_VMCS; 129 } 130 131 static inline bool nested_cpu_has(struct vmcs12 *vmcs12, u32 bit) 132 { 133 return vmcs12->cpu_based_vm_exec_control & bit; 134 } 135 136 static inline bool nested_cpu_has2(struct vmcs12 *vmcs12, u32 bit) 137 { 138 return (vmcs12->cpu_based_vm_exec_control & 139 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) && 140 (vmcs12->secondary_vm_exec_control & bit); 141 } 142 143 static inline bool nested_cpu_has_preemption_timer(struct vmcs12 *vmcs12) 144 { 145 return vmcs12->pin_based_vm_exec_control & 146 PIN_BASED_VMX_PREEMPTION_TIMER; 147 } 148 149 static inline bool nested_cpu_has_nmi_exiting(struct vmcs12 *vmcs12) 150 { 151 return vmcs12->pin_based_vm_exec_control & PIN_BASED_NMI_EXITING; 152 } 153 154 static inline bool nested_cpu_has_virtual_nmis(struct vmcs12 *vmcs12) 155 { 156 return vmcs12->pin_based_vm_exec_control & PIN_BASED_VIRTUAL_NMIS; 157 } 158 159 static inline int nested_cpu_has_mtf(struct vmcs12 *vmcs12) 160 { 161 return nested_cpu_has(vmcs12, CPU_BASED_MONITOR_TRAP_FLAG); 162 } 163 164 static inline int nested_cpu_has_ept(struct vmcs12 *vmcs12) 165 { 166 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_EPT); 167 } 168 169 static inline bool nested_cpu_has_xsaves(struct vmcs12 *vmcs12) 170 { 171 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_XSAVES); 172 } 173 174 static inline bool nested_cpu_has_pml(struct vmcs12 *vmcs12) 175 { 176 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_PML); 177 } 178 179 static inline bool nested_cpu_has_virt_x2apic_mode(struct vmcs12 *vmcs12) 180 { 181 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE); 182 } 183 184 static inline bool nested_cpu_has_vpid(struct vmcs12 *vmcs12) 185 { 186 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_VPID); 187 } 188 189 static inline bool nested_cpu_has_apic_reg_virt(struct vmcs12 *vmcs12) 190 { 191 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_APIC_REGISTER_VIRT); 192 } 193 194 static inline bool nested_cpu_has_vid(struct vmcs12 *vmcs12) 195 { 196 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY); 197 } 198 199 static inline bool nested_cpu_has_posted_intr(struct vmcs12 *vmcs12) 200 { 201 return vmcs12->pin_based_vm_exec_control & PIN_BASED_POSTED_INTR; 202 } 203 204 static inline bool nested_cpu_has_vmfunc(struct vmcs12 *vmcs12) 205 { 206 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_VMFUNC); 207 } 208 209 static inline bool nested_cpu_has_eptp_switching(struct vmcs12 *vmcs12) 210 { 211 return nested_cpu_has_vmfunc(vmcs12) && 212 (vmcs12->vm_function_control & 213 VMX_VMFUNC_EPTP_SWITCHING); 214 } 215 216 static inline bool nested_cpu_has_shadow_vmcs(struct vmcs12 *vmcs12) 217 { 218 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_SHADOW_VMCS); 219 } 220 221 static inline bool nested_cpu_has_save_preemption_timer(struct vmcs12 *vmcs12) 222 { 223 return vmcs12->vm_exit_controls & 224 VM_EXIT_SAVE_VMX_PREEMPTION_TIMER; 225 } 226 227 static inline bool nested_exit_on_nmi(struct kvm_vcpu *vcpu) 228 { 229 return nested_cpu_has_nmi_exiting(get_vmcs12(vcpu)); 230 } 231 232 /* 233 * In nested virtualization, check if L1 asked to exit on external interrupts. 234 * For most existing hypervisors, this will always return true. 235 */ 236 static inline bool nested_exit_on_intr(struct kvm_vcpu *vcpu) 237 { 238 return get_vmcs12(vcpu)->pin_based_vm_exec_control & 239 PIN_BASED_EXT_INTR_MASK; 240 } 241 242 static inline bool nested_cpu_has_encls_exit(struct vmcs12 *vmcs12) 243 { 244 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENCLS_EXITING); 245 } 246 247 /* 248 * if fixed0[i] == 1: val[i] must be 1 249 * if fixed1[i] == 0: val[i] must be 0 250 */ 251 static inline bool fixed_bits_valid(u64 val, u64 fixed0, u64 fixed1) 252 { 253 return ((val & fixed1) | fixed0) == val; 254 } 255 256 static inline bool nested_guest_cr0_valid(struct kvm_vcpu *vcpu, unsigned long val) 257 { 258 u64 fixed0 = to_vmx(vcpu)->nested.msrs.cr0_fixed0; 259 u64 fixed1 = to_vmx(vcpu)->nested.msrs.cr0_fixed1; 260 struct vmcs12 *vmcs12 = get_vmcs12(vcpu); 261 262 if (to_vmx(vcpu)->nested.msrs.secondary_ctls_high & 263 SECONDARY_EXEC_UNRESTRICTED_GUEST && 264 nested_cpu_has2(vmcs12, SECONDARY_EXEC_UNRESTRICTED_GUEST)) 265 fixed0 &= ~(X86_CR0_PE | X86_CR0_PG); 266 267 return fixed_bits_valid(val, fixed0, fixed1); 268 } 269 270 static inline bool nested_host_cr0_valid(struct kvm_vcpu *vcpu, unsigned long val) 271 { 272 u64 fixed0 = to_vmx(vcpu)->nested.msrs.cr0_fixed0; 273 u64 fixed1 = to_vmx(vcpu)->nested.msrs.cr0_fixed1; 274 275 return fixed_bits_valid(val, fixed0, fixed1); 276 } 277 278 static inline bool nested_cr4_valid(struct kvm_vcpu *vcpu, unsigned long val) 279 { 280 u64 fixed0 = to_vmx(vcpu)->nested.msrs.cr4_fixed0; 281 u64 fixed1 = to_vmx(vcpu)->nested.msrs.cr4_fixed1; 282 283 return fixed_bits_valid(val, fixed0, fixed1) && 284 __kvm_is_valid_cr4(vcpu, val); 285 } 286 287 /* No difference in the restrictions on guest and host CR4 in VMX operation. */ 288 #define nested_guest_cr4_valid nested_cr4_valid 289 #define nested_host_cr4_valid nested_cr4_valid 290 291 extern struct kvm_x86_nested_ops vmx_nested_ops; 292 293 #endif /* __KVM_X86_VMX_NESTED_H */ 294