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 void vmx_leave_nested(struct kvm_vcpu *vcpu); 10 void nested_vmx_setup_ctls_msrs(struct nested_vmx_msrs *msrs, u32 ept_caps, 11 bool apicv); 12 void nested_vmx_hardware_unsetup(void); 13 __init int nested_vmx_hardware_setup(int (*exit_handlers[])(struct kvm_vcpu *)); 14 void nested_vmx_vcpu_setup(void); 15 void nested_vmx_free_vcpu(struct kvm_vcpu *vcpu); 16 int nested_vmx_enter_non_root_mode(struct kvm_vcpu *vcpu, bool from_vmentry); 17 bool nested_vmx_exit_reflected(struct kvm_vcpu *vcpu, u32 exit_reason); 18 void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason, 19 u32 exit_intr_info, unsigned long exit_qualification); 20 void nested_sync_vmcs12_to_shadow(struct kvm_vcpu *vcpu); 21 int vmx_set_vmx_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); 22 int vmx_get_vmx_msr(struct nested_vmx_msrs *msrs, u32 msr_index, u64 *pdata); 23 int get_vmx_mem_address(struct kvm_vcpu *vcpu, unsigned long exit_qualification, 24 u32 vmx_instruction_info, bool wr, int len, gva_t *ret); 25 26 static inline struct vmcs12 *get_vmcs12(struct kvm_vcpu *vcpu) 27 { 28 return to_vmx(vcpu)->nested.cached_vmcs12; 29 } 30 31 static inline struct vmcs12 *get_shadow_vmcs12(struct kvm_vcpu *vcpu) 32 { 33 return to_vmx(vcpu)->nested.cached_shadow_vmcs12; 34 } 35 36 static inline int vmx_has_valid_vmcs12(struct kvm_vcpu *vcpu) 37 { 38 struct vcpu_vmx *vmx = to_vmx(vcpu); 39 40 /* 41 * In case we do two consecutive get/set_nested_state()s while L2 was 42 * running hv_evmcs may end up not being mapped (we map it from 43 * nested_vmx_run()/vmx_vcpu_run()). Check is_guest_mode() as we always 44 * have vmcs12 if it is true. 45 */ 46 return is_guest_mode(vcpu) || vmx->nested.current_vmptr != -1ull || 47 vmx->nested.hv_evmcs; 48 } 49 50 static inline unsigned long nested_ept_get_cr3(struct kvm_vcpu *vcpu) 51 { 52 /* return the page table to be shadowed - in our case, EPT12 */ 53 return get_vmcs12(vcpu)->ept_pointer; 54 } 55 56 static inline bool nested_ept_ad_enabled(struct kvm_vcpu *vcpu) 57 { 58 return nested_ept_get_cr3(vcpu) & VMX_EPTP_AD_ENABLE_BIT; 59 } 60 61 /* 62 * Reflect a VM Exit into L1. 63 */ 64 static inline int nested_vmx_reflect_vmexit(struct kvm_vcpu *vcpu, 65 u32 exit_reason) 66 { 67 u32 exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO); 68 69 /* 70 * At this point, the exit interruption info in exit_intr_info 71 * is only valid for EXCEPTION_NMI exits. For EXTERNAL_INTERRUPT 72 * we need to query the in-kernel LAPIC. 73 */ 74 WARN_ON(exit_reason == EXIT_REASON_EXTERNAL_INTERRUPT); 75 if ((exit_intr_info & 76 (INTR_INFO_VALID_MASK | INTR_INFO_DELIVER_CODE_MASK)) == 77 (INTR_INFO_VALID_MASK | INTR_INFO_DELIVER_CODE_MASK)) { 78 struct vmcs12 *vmcs12 = get_vmcs12(vcpu); 79 80 vmcs12->vm_exit_intr_error_code = 81 vmcs_read32(VM_EXIT_INTR_ERROR_CODE); 82 } 83 84 nested_vmx_vmexit(vcpu, exit_reason, exit_intr_info, 85 vmcs_readl(EXIT_QUALIFICATION)); 86 return 1; 87 } 88 89 /* 90 * Return the cr0 value that a nested guest would read. This is a combination 91 * of the real cr0 used to run the guest (guest_cr0), and the bits shadowed by 92 * its hypervisor (cr0_read_shadow). 93 */ 94 static inline unsigned long nested_read_cr0(struct vmcs12 *fields) 95 { 96 return (fields->guest_cr0 & ~fields->cr0_guest_host_mask) | 97 (fields->cr0_read_shadow & fields->cr0_guest_host_mask); 98 } 99 static inline unsigned long nested_read_cr4(struct vmcs12 *fields) 100 { 101 return (fields->guest_cr4 & ~fields->cr4_guest_host_mask) | 102 (fields->cr4_read_shadow & fields->cr4_guest_host_mask); 103 } 104 105 static inline unsigned nested_cpu_vmx_misc_cr3_count(struct kvm_vcpu *vcpu) 106 { 107 return vmx_misc_cr3_count(to_vmx(vcpu)->nested.msrs.misc_low); 108 } 109 110 /* 111 * Do the virtual VMX capability MSRs specify that L1 can use VMWRITE 112 * to modify any valid field of the VMCS, or are the VM-exit 113 * information fields read-only? 114 */ 115 static inline bool nested_cpu_has_vmwrite_any_field(struct kvm_vcpu *vcpu) 116 { 117 return to_vmx(vcpu)->nested.msrs.misc_low & 118 MSR_IA32_VMX_MISC_VMWRITE_SHADOW_RO_FIELDS; 119 } 120 121 static inline bool nested_cpu_has_zero_length_injection(struct kvm_vcpu *vcpu) 122 { 123 return to_vmx(vcpu)->nested.msrs.misc_low & VMX_MISC_ZERO_LEN_INS; 124 } 125 126 static inline bool nested_cpu_supports_monitor_trap_flag(struct kvm_vcpu *vcpu) 127 { 128 return to_vmx(vcpu)->nested.msrs.procbased_ctls_high & 129 CPU_BASED_MONITOR_TRAP_FLAG; 130 } 131 132 static inline bool nested_cpu_has_vmx_shadow_vmcs(struct kvm_vcpu *vcpu) 133 { 134 return to_vmx(vcpu)->nested.msrs.secondary_ctls_high & 135 SECONDARY_EXEC_SHADOW_VMCS; 136 } 137 138 static inline bool nested_cpu_has(struct vmcs12 *vmcs12, u32 bit) 139 { 140 return vmcs12->cpu_based_vm_exec_control & bit; 141 } 142 143 static inline bool nested_cpu_has2(struct vmcs12 *vmcs12, u32 bit) 144 { 145 return (vmcs12->cpu_based_vm_exec_control & 146 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) && 147 (vmcs12->secondary_vm_exec_control & bit); 148 } 149 150 static inline bool nested_cpu_has_preemption_timer(struct vmcs12 *vmcs12) 151 { 152 return vmcs12->pin_based_vm_exec_control & 153 PIN_BASED_VMX_PREEMPTION_TIMER; 154 } 155 156 static inline bool nested_cpu_has_nmi_exiting(struct vmcs12 *vmcs12) 157 { 158 return vmcs12->pin_based_vm_exec_control & PIN_BASED_NMI_EXITING; 159 } 160 161 static inline bool nested_cpu_has_virtual_nmis(struct vmcs12 *vmcs12) 162 { 163 return vmcs12->pin_based_vm_exec_control & PIN_BASED_VIRTUAL_NMIS; 164 } 165 166 static inline int nested_cpu_has_ept(struct vmcs12 *vmcs12) 167 { 168 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_EPT); 169 } 170 171 static inline bool nested_cpu_has_xsaves(struct vmcs12 *vmcs12) 172 { 173 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_XSAVES); 174 } 175 176 static inline bool nested_cpu_has_pml(struct vmcs12 *vmcs12) 177 { 178 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_PML); 179 } 180 181 static inline bool nested_cpu_has_virt_x2apic_mode(struct vmcs12 *vmcs12) 182 { 183 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE); 184 } 185 186 static inline bool nested_cpu_has_vpid(struct vmcs12 *vmcs12) 187 { 188 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_VPID); 189 } 190 191 static inline bool nested_cpu_has_apic_reg_virt(struct vmcs12 *vmcs12) 192 { 193 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_APIC_REGISTER_VIRT); 194 } 195 196 static inline bool nested_cpu_has_vid(struct vmcs12 *vmcs12) 197 { 198 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY); 199 } 200 201 static inline bool nested_cpu_has_posted_intr(struct vmcs12 *vmcs12) 202 { 203 return vmcs12->pin_based_vm_exec_control & PIN_BASED_POSTED_INTR; 204 } 205 206 static inline bool nested_cpu_has_vmfunc(struct vmcs12 *vmcs12) 207 { 208 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_VMFUNC); 209 } 210 211 static inline bool nested_cpu_has_eptp_switching(struct vmcs12 *vmcs12) 212 { 213 return nested_cpu_has_vmfunc(vmcs12) && 214 (vmcs12->vm_function_control & 215 VMX_VMFUNC_EPTP_SWITCHING); 216 } 217 218 static inline bool nested_cpu_has_shadow_vmcs(struct vmcs12 *vmcs12) 219 { 220 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_SHADOW_VMCS); 221 } 222 223 static inline bool nested_cpu_has_save_preemption_timer(struct vmcs12 *vmcs12) 224 { 225 return vmcs12->vm_exit_controls & 226 VM_EXIT_SAVE_VMX_PREEMPTION_TIMER; 227 } 228 229 /* 230 * In nested virtualization, check if L1 asked to exit on external interrupts. 231 * For most existing hypervisors, this will always return true. 232 */ 233 static inline bool nested_exit_on_intr(struct kvm_vcpu *vcpu) 234 { 235 return get_vmcs12(vcpu)->pin_based_vm_exec_control & 236 PIN_BASED_EXT_INTR_MASK; 237 } 238 239 /* 240 * if fixed0[i] == 1: val[i] must be 1 241 * if fixed1[i] == 0: val[i] must be 0 242 */ 243 static inline bool fixed_bits_valid(u64 val, u64 fixed0, u64 fixed1) 244 { 245 return ((val & fixed1) | fixed0) == val; 246 } 247 248 static bool nested_guest_cr0_valid(struct kvm_vcpu *vcpu, unsigned long val) 249 { 250 u64 fixed0 = to_vmx(vcpu)->nested.msrs.cr0_fixed0; 251 u64 fixed1 = to_vmx(vcpu)->nested.msrs.cr0_fixed1; 252 struct vmcs12 *vmcs12 = get_vmcs12(vcpu); 253 254 if (to_vmx(vcpu)->nested.msrs.secondary_ctls_high & 255 SECONDARY_EXEC_UNRESTRICTED_GUEST && 256 nested_cpu_has2(vmcs12, SECONDARY_EXEC_UNRESTRICTED_GUEST)) 257 fixed0 &= ~(X86_CR0_PE | X86_CR0_PG); 258 259 return fixed_bits_valid(val, fixed0, fixed1); 260 } 261 262 static bool nested_host_cr0_valid(struct kvm_vcpu *vcpu, unsigned long val) 263 { 264 u64 fixed0 = to_vmx(vcpu)->nested.msrs.cr0_fixed0; 265 u64 fixed1 = to_vmx(vcpu)->nested.msrs.cr0_fixed1; 266 267 return fixed_bits_valid(val, fixed0, fixed1); 268 } 269 270 static bool nested_cr4_valid(struct kvm_vcpu *vcpu, unsigned long val) 271 { 272 u64 fixed0 = to_vmx(vcpu)->nested.msrs.cr4_fixed0; 273 u64 fixed1 = to_vmx(vcpu)->nested.msrs.cr4_fixed1; 274 275 return fixed_bits_valid(val, fixed0, fixed1); 276 } 277 278 /* No difference in the restrictions on guest and host CR4 in VMX operation. */ 279 #define nested_guest_cr4_valid nested_cr4_valid 280 #define nested_host_cr4_valid nested_cr4_valid 281 282 #endif /* __KVM_X86_VMX_NESTED_H */ 283