x86/kvm/vmx/evmcs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 #include <linux/errno.h>
   4 #include <linux/smp.h>
   5
   6 #include "../hyperv.h"
   7 #include "../cpuid.h"
   8 #include "evmcs.h"
   9 #include "vmcs.h"
  10 #include "vmx.h"
  11 #include "trace.h"
  12
  13 #define CC KVM_NESTED_VMENTER_CONSISTENCY_CHECK
  14
  15 DEFINE_STATIC_KEY_FALSE(enable_evmcs);
  16
  17 #define EVMCS1_OFFSET(x) offsetof(struct hv_enlightened_vmcs, x)
  18 #define EVMCS1_FIELD(number, name, clean_field)[ROL16(number, 6)] = \
  19                 {EVMCS1_OFFSET(name), clean_field}
  20
  21 const struct evmcs_field vmcs_field_to_evmcs_1[] = {
  22         /* 64 bit rw */
  23         EVMCS1_FIELD(GUEST_RIP, guest_rip,
  24                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
  25         EVMCS1_FIELD(GUEST_RSP, guest_rsp,
  26                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC),
  27         EVMCS1_FIELD(GUEST_RFLAGS, guest_rflags,
  28                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC),
  29         EVMCS1_FIELD(HOST_IA32_PAT, host_ia32_pat,
  30                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
  31         EVMCS1_FIELD(HOST_IA32_EFER, host_ia32_efer,
  32                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
  33         EVMCS1_FIELD(HOST_IA32_PERF_GLOBAL_CTRL, host_ia32_perf_global_ctrl,
  34                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
  35         EVMCS1_FIELD(HOST_CR0, host_cr0,
  36                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
  37         EVMCS1_FIELD(HOST_CR3, host_cr3,
  38                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
  39         EVMCS1_FIELD(HOST_CR4, host_cr4,
  40                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
  41         EVMCS1_FIELD(HOST_IA32_SYSENTER_ESP, host_ia32_sysenter_esp,
  42                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
  43         EVMCS1_FIELD(HOST_IA32_SYSENTER_EIP, host_ia32_sysenter_eip,
  44                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
  45         EVMCS1_FIELD(HOST_RIP, host_rip,
  46                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
  47         EVMCS1_FIELD(IO_BITMAP_A, io_bitmap_a,
  48                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_IO_BITMAP),
  49         EVMCS1_FIELD(IO_BITMAP_B, io_bitmap_b,
  50                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_IO_BITMAP),
  51         EVMCS1_FIELD(MSR_BITMAP, msr_bitmap,
  52                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP),
  53         EVMCS1_FIELD(GUEST_ES_BASE, guest_es_base,
  54                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
  55         EVMCS1_FIELD(GUEST_CS_BASE, guest_cs_base,
  56                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
  57         EVMCS1_FIELD(GUEST_SS_BASE, guest_ss_base,
  58                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
  59         EVMCS1_FIELD(GUEST_DS_BASE, guest_ds_base,
  60                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
  61         EVMCS1_FIELD(GUEST_FS_BASE, guest_fs_base,
  62                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
  63         EVMCS1_FIELD(GUEST_GS_BASE, guest_gs_base,
  64                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
  65         EVMCS1_FIELD(GUEST_LDTR_BASE, guest_ldtr_base,
  66                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
  67         EVMCS1_FIELD(GUEST_TR_BASE, guest_tr_base,
  68                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
  69         EVMCS1_FIELD(GUEST_GDTR_BASE, guest_gdtr_base,
  70                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
  71         EVMCS1_FIELD(GUEST_IDTR_BASE, guest_idtr_base,
  72                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
  73         EVMCS1_FIELD(TSC_OFFSET, tsc_offset,
  74                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
  75         EVMCS1_FIELD(VIRTUAL_APIC_PAGE_ADDR, virtual_apic_page_addr,
  76                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
  77         EVMCS1_FIELD(VMCS_LINK_POINTER, vmcs_link_pointer,
  78                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
  79         EVMCS1_FIELD(GUEST_IA32_DEBUGCTL, guest_ia32_debugctl,
  80                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
  81         EVMCS1_FIELD(GUEST_IA32_PAT, guest_ia32_pat,
  82                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
  83         EVMCS1_FIELD(GUEST_IA32_EFER, guest_ia32_efer,
  84                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
  85         EVMCS1_FIELD(GUEST_IA32_PERF_GLOBAL_CTRL, guest_ia32_perf_global_ctrl,
  86                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
  87         EVMCS1_FIELD(GUEST_PDPTR0, guest_pdptr0,
  88                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
  89         EVMCS1_FIELD(GUEST_PDPTR1, guest_pdptr1,
  90                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
  91         EVMCS1_FIELD(GUEST_PDPTR2, guest_pdptr2,
  92                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
  93         EVMCS1_FIELD(GUEST_PDPTR3, guest_pdptr3,
  94                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
  95         EVMCS1_FIELD(GUEST_PENDING_DBG_EXCEPTIONS, guest_pending_dbg_exceptions,
  96                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
  97         EVMCS1_FIELD(GUEST_SYSENTER_ESP, guest_sysenter_esp,
  98                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
  99         EVMCS1_FIELD(GUEST_SYSENTER_EIP, guest_sysenter_eip,
 100                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
 101         EVMCS1_FIELD(CR0_GUEST_HOST_MASK, cr0_guest_host_mask,
 102                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
 103         EVMCS1_FIELD(CR4_GUEST_HOST_MASK, cr4_guest_host_mask,
 104                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
 105         EVMCS1_FIELD(CR0_READ_SHADOW, cr0_read_shadow,
 106                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
 107         EVMCS1_FIELD(CR4_READ_SHADOW, cr4_read_shadow,
 108                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
 109         EVMCS1_FIELD(GUEST_CR0, guest_cr0,
 110                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
 111         EVMCS1_FIELD(GUEST_CR3, guest_cr3,
 112                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
 113         EVMCS1_FIELD(GUEST_CR4, guest_cr4,
 114                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
 115         EVMCS1_FIELD(GUEST_DR7, guest_dr7,
 116                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
 117         EVMCS1_FIELD(HOST_FS_BASE, host_fs_base,
 118                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
 119         EVMCS1_FIELD(HOST_GS_BASE, host_gs_base,
 120                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
 121         EVMCS1_FIELD(HOST_TR_BASE, host_tr_base,
 122                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
 123         EVMCS1_FIELD(HOST_GDTR_BASE, host_gdtr_base,
 124                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
 125         EVMCS1_FIELD(HOST_IDTR_BASE, host_idtr_base,
 126                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
 127         EVMCS1_FIELD(HOST_RSP, host_rsp,
 128                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
 129         EVMCS1_FIELD(EPT_POINTER, ept_pointer,
 130                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_XLAT),
 131         EVMCS1_FIELD(GUEST_BNDCFGS, guest_bndcfgs,
 132                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
 133         EVMCS1_FIELD(XSS_EXIT_BITMAP, xss_exit_bitmap,
 134                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
 135         EVMCS1_FIELD(ENCLS_EXITING_BITMAP, encls_exiting_bitmap,
 136                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
 137         EVMCS1_FIELD(TSC_MULTIPLIER, tsc_multiplier,
 138                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
 139         /*
 140          * Not used by KVM:
 141          *
 142          * EVMCS1_FIELD(0x00006828, guest_ia32_s_cet,
 143          *           HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
 144          * EVMCS1_FIELD(0x0000682A, guest_ssp,
 145          *           HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC),
 146          * EVMCS1_FIELD(0x0000682C, guest_ia32_int_ssp_table_addr,
 147          *           HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
 148          * EVMCS1_FIELD(0x00002816, guest_ia32_lbr_ctl,
 149          *           HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
 150          * EVMCS1_FIELD(0x00006C18, host_ia32_s_cet,
 151          *           HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
 152          * EVMCS1_FIELD(0x00006C1A, host_ssp,
 153          *           HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
 154          * EVMCS1_FIELD(0x00006C1C, host_ia32_int_ssp_table_addr,
 155          *           HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
 156          */
 157
 158         /* 64 bit read only */
 159         EVMCS1_FIELD(GUEST_PHYSICAL_ADDRESS, guest_physical_address,
 160                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
 161         EVMCS1_FIELD(EXIT_QUALIFICATION, exit_qualification,
 162                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
 163         /*
 164          * Not defined in KVM:
 165          *
 166          * EVMCS1_FIELD(0x00006402, exit_io_instruction_ecx,
 167          *              HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE);
 168          * EVMCS1_FIELD(0x00006404, exit_io_instruction_esi,
 169          *              HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE);
 170          * EVMCS1_FIELD(0x00006406, exit_io_instruction_esi,
 171          *              HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE);
 172          * EVMCS1_FIELD(0x00006408, exit_io_instruction_eip,
 173          *              HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE);
 174          */
 175         EVMCS1_FIELD(GUEST_LINEAR_ADDRESS, guest_linear_address,
 176                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
 177
 178         /*
 179          * No mask defined in the spec as Hyper-V doesn't currently support
 180          * these. Future proof by resetting the whole clean field mask on
 181          * access.
 182          */
 183         EVMCS1_FIELD(VM_EXIT_MSR_STORE_ADDR, vm_exit_msr_store_addr,
 184                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
 185         EVMCS1_FIELD(VM_EXIT_MSR_LOAD_ADDR, vm_exit_msr_load_addr,
 186                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
 187         EVMCS1_FIELD(VM_ENTRY_MSR_LOAD_ADDR, vm_entry_msr_load_addr,
 188                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
 189
 190         /* 32 bit rw */
 191         EVMCS1_FIELD(TPR_THRESHOLD, tpr_threshold,
 192                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
 193         EVMCS1_FIELD(GUEST_INTERRUPTIBILITY_INFO, guest_interruptibility_info,
 194                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC),
 195         EVMCS1_FIELD(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control,
 196                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_PROC),
 197         EVMCS1_FIELD(EXCEPTION_BITMAP, exception_bitmap,
 198                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EXCPN),
 199         EVMCS1_FIELD(VM_ENTRY_CONTROLS, vm_entry_controls,
 200                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_ENTRY),
 201         EVMCS1_FIELD(VM_ENTRY_INTR_INFO_FIELD, vm_entry_intr_info_field,
 202                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EVENT),
 203         EVMCS1_FIELD(VM_ENTRY_EXCEPTION_ERROR_CODE,
 204                      vm_entry_exception_error_code,
 205                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EVENT),
 206         EVMCS1_FIELD(VM_ENTRY_INSTRUCTION_LEN, vm_entry_instruction_len,
 207                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EVENT),
 208         EVMCS1_FIELD(HOST_IA32_SYSENTER_CS, host_ia32_sysenter_cs,
 209                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
 210         EVMCS1_FIELD(PIN_BASED_VM_EXEC_CONTROL, pin_based_vm_exec_control,
 211                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP1),
 212         EVMCS1_FIELD(VM_EXIT_CONTROLS, vm_exit_controls,
 213                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP1),
 214         EVMCS1_FIELD(SECONDARY_VM_EXEC_CONTROL, secondary_vm_exec_control,
 215                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP1),
 216         EVMCS1_FIELD(GUEST_ES_LIMIT, guest_es_limit,
 217                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 218         EVMCS1_FIELD(GUEST_CS_LIMIT, guest_cs_limit,
 219                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 220         EVMCS1_FIELD(GUEST_SS_LIMIT, guest_ss_limit,
 221                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 222         EVMCS1_FIELD(GUEST_DS_LIMIT, guest_ds_limit,
 223                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 224         EVMCS1_FIELD(GUEST_FS_LIMIT, guest_fs_limit,
 225                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 226         EVMCS1_FIELD(GUEST_GS_LIMIT, guest_gs_limit,
 227                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 228         EVMCS1_FIELD(GUEST_LDTR_LIMIT, guest_ldtr_limit,
 229                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 230         EVMCS1_FIELD(GUEST_TR_LIMIT, guest_tr_limit,
 231                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 232         EVMCS1_FIELD(GUEST_GDTR_LIMIT, guest_gdtr_limit,
 233                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 234         EVMCS1_FIELD(GUEST_IDTR_LIMIT, guest_idtr_limit,
 235                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 236         EVMCS1_FIELD(GUEST_ES_AR_BYTES, guest_es_ar_bytes,
 237                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 238         EVMCS1_FIELD(GUEST_CS_AR_BYTES, guest_cs_ar_bytes,
 239                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 240         EVMCS1_FIELD(GUEST_SS_AR_BYTES, guest_ss_ar_bytes,
 241                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 242         EVMCS1_FIELD(GUEST_DS_AR_BYTES, guest_ds_ar_bytes,
 243                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 244         EVMCS1_FIELD(GUEST_FS_AR_BYTES, guest_fs_ar_bytes,
 245                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 246         EVMCS1_FIELD(GUEST_GS_AR_BYTES, guest_gs_ar_bytes,
 247                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 248         EVMCS1_FIELD(GUEST_LDTR_AR_BYTES, guest_ldtr_ar_bytes,
 249                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 250         EVMCS1_FIELD(GUEST_TR_AR_BYTES, guest_tr_ar_bytes,
 251                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 252         EVMCS1_FIELD(GUEST_ACTIVITY_STATE, guest_activity_state,
 253                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
 254         EVMCS1_FIELD(GUEST_SYSENTER_CS, guest_sysenter_cs,
 255                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
 256
 257         /* 32 bit read only */
 258         EVMCS1_FIELD(VM_INSTRUCTION_ERROR, vm_instruction_error,
 259                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
 260         EVMCS1_FIELD(VM_EXIT_REASON, vm_exit_reason,
 261                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
 262         EVMCS1_FIELD(VM_EXIT_INTR_INFO, vm_exit_intr_info,
 263                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
 264         EVMCS1_FIELD(VM_EXIT_INTR_ERROR_CODE, vm_exit_intr_error_code,
 265                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
 266         EVMCS1_FIELD(IDT_VECTORING_INFO_FIELD, idt_vectoring_info_field,
 267                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
 268         EVMCS1_FIELD(IDT_VECTORING_ERROR_CODE, idt_vectoring_error_code,
 269                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
 270         EVMCS1_FIELD(VM_EXIT_INSTRUCTION_LEN, vm_exit_instruction_len,
 271                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
 272         EVMCS1_FIELD(VMX_INSTRUCTION_INFO, vmx_instruction_info,
 273                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
 274
 275         /* No mask defined in the spec (not used) */
 276         EVMCS1_FIELD(PAGE_FAULT_ERROR_CODE_MASK, page_fault_error_code_mask,
 277                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
 278         EVMCS1_FIELD(PAGE_FAULT_ERROR_CODE_MATCH, page_fault_error_code_match,
 279                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
 280         EVMCS1_FIELD(CR3_TARGET_COUNT, cr3_target_count,
 281                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
 282         EVMCS1_FIELD(VM_EXIT_MSR_STORE_COUNT, vm_exit_msr_store_count,
 283                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
 284         EVMCS1_FIELD(VM_EXIT_MSR_LOAD_COUNT, vm_exit_msr_load_count,
 285                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
 286         EVMCS1_FIELD(VM_ENTRY_MSR_LOAD_COUNT, vm_entry_msr_load_count,
 287                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
 288
 289         /* 16 bit rw */
 290         EVMCS1_FIELD(HOST_ES_SELECTOR, host_es_selector,
 291                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
 292         EVMCS1_FIELD(HOST_CS_SELECTOR, host_cs_selector,
 293                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
 294         EVMCS1_FIELD(HOST_SS_SELECTOR, host_ss_selector,
 295                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
 296         EVMCS1_FIELD(HOST_DS_SELECTOR, host_ds_selector,
 297                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
 298         EVMCS1_FIELD(HOST_FS_SELECTOR, host_fs_selector,
 299                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
 300         EVMCS1_FIELD(HOST_GS_SELECTOR, host_gs_selector,
 301                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
 302         EVMCS1_FIELD(HOST_TR_SELECTOR, host_tr_selector,
 303                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
 304         EVMCS1_FIELD(GUEST_ES_SELECTOR, guest_es_selector,
 305                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 306         EVMCS1_FIELD(GUEST_CS_SELECTOR, guest_cs_selector,
 307                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 308         EVMCS1_FIELD(GUEST_SS_SELECTOR, guest_ss_selector,
 309                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 310         EVMCS1_FIELD(GUEST_DS_SELECTOR, guest_ds_selector,
 311                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 312         EVMCS1_FIELD(GUEST_FS_SELECTOR, guest_fs_selector,
 313                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 314         EVMCS1_FIELD(GUEST_GS_SELECTOR, guest_gs_selector,
 315                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 316         EVMCS1_FIELD(GUEST_LDTR_SELECTOR, guest_ldtr_selector,
 317                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 318         EVMCS1_FIELD(GUEST_TR_SELECTOR, guest_tr_selector,
 319                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
 320         EVMCS1_FIELD(VIRTUAL_PROCESSOR_ID, virtual_processor_id,
 321                      HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_XLAT),
 322 };
 323 const unsigned int nr_evmcs_1_fields = ARRAY_SIZE(vmcs_field_to_evmcs_1);
 324
 325 bool nested_enlightened_vmentry(struct kvm_vcpu *vcpu, u64 *evmcs_gpa)
 326 {
 327         struct hv_vp_assist_page assist_page;
 328
 329         *evmcs_gpa = -1ull;
 330
 331         if (unlikely(!kvm_hv_get_assist_page(vcpu, &assist_page)))
 332                 return false;
 333
 334         if (unlikely(!assist_page.enlighten_vmentry))
 335                 return false;
 336
 337         if (unlikely(!evmptr_is_valid(assist_page.current_nested_vmcs)))
 338                 return false;
 339
 340         *evmcs_gpa = assist_page.current_nested_vmcs;
 341
 342         return true;
 343 }
 344
 345 uint16_t nested_get_evmcs_version(struct kvm_vcpu *vcpu)
 346 {
 347         /*
 348          * vmcs_version represents the range of supported Enlightened VMCS
 349          * versions: lower 8 bits is the minimal version, higher 8 bits is the
 350          * maximum supported version. KVM supports versions from 1 to
 351          * KVM_EVMCS_VERSION.
 352          *
 353          * Note, do not check the Hyper-V is fully enabled in guest CPUID, this
 354          * helper is used to _get_ the vCPU's supported CPUID.
 355          */
 356         if (kvm_cpu_cap_get(X86_FEATURE_VMX) &&
 357             (!vcpu || to_vmx(vcpu)->nested.enlightened_vmcs_enabled))
 358                 return (KVM_EVMCS_VERSION << 8) | 1;
 359
 360         return 0;
 361 }
 362
 363 enum evmcs_revision {
 364         EVMCSv1_LEGACY,
 365         NR_EVMCS_REVISIONS,
 366 };
 367
 368 enum evmcs_ctrl_type {
 369         EVMCS_EXIT_CTRLS,
 370         EVMCS_ENTRY_CTRLS,
 371         EVMCS_2NDEXEC,
 372         EVMCS_PINCTRL,
 373         EVMCS_VMFUNC,
 374         NR_EVMCS_CTRLS,
 375 };
 376
 377 static const u32 evmcs_unsupported_ctrls[NR_EVMCS_CTRLS][NR_EVMCS_REVISIONS] = {
 378         [EVMCS_EXIT_CTRLS] = {
 379                 [EVMCSv1_LEGACY] = EVMCS1_UNSUPPORTED_VMEXIT_CTRL,
 380         },
 381         [EVMCS_ENTRY_CTRLS] = {
 382                 [EVMCSv1_LEGACY] = EVMCS1_UNSUPPORTED_VMENTRY_CTRL,
 383         },
 384         [EVMCS_2NDEXEC] = {
 385                 [EVMCSv1_LEGACY] = EVMCS1_UNSUPPORTED_2NDEXEC,
 386         },
 387         [EVMCS_PINCTRL] = {
 388                 [EVMCSv1_LEGACY] = EVMCS1_UNSUPPORTED_PINCTRL,
 389         },
 390         [EVMCS_VMFUNC] = {
 391                 [EVMCSv1_LEGACY] = EVMCS1_UNSUPPORTED_VMFUNC,
 392         },
 393 };
 394
 395 static u32 evmcs_get_unsupported_ctls(enum evmcs_ctrl_type ctrl_type)
 396 {
 397         enum evmcs_revision evmcs_rev = EVMCSv1_LEGACY;
 398
 399         return evmcs_unsupported_ctrls[ctrl_type][evmcs_rev];
 400 }
 401
 402 static bool evmcs_has_perf_global_ctrl(struct kvm_vcpu *vcpu)
 403 {
 404         struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
 405
 406         /*
 407          * PERF_GLOBAL_CTRL has a quirk where some Windows guests may fail to
 408          * boot if a PV CPUID feature flag is not also set.  Treat the fields
 409          * as unsupported if the flag is not set in guest CPUID.  This should
 410          * be called only for guest accesses, and all guest accesses should be
 411          * gated on Hyper-V being enabled and initialized.
 412          */
 413         if (WARN_ON_ONCE(!hv_vcpu))
 414                 return false;
 415
 416         return hv_vcpu->cpuid_cache.nested_ebx & HV_X64_NESTED_EVMCS1_PERF_GLOBAL_CTRL;
 417 }
 418
 419 void nested_evmcs_filter_control_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
 420 {
 421         u32 ctl_low = (u32)*pdata;
 422         u32 ctl_high = (u32)(*pdata >> 32);
 423         u32 unsupported_ctrls;
 424
 425         /*
 426          * Hyper-V 2016 and 2019 try using these features even when eVMCS
 427          * is enabled but there are no corresponding fields.
 428          */
 429         switch (msr_index) {
 430         case MSR_IA32_VMX_EXIT_CTLS:
 431         case MSR_IA32_VMX_TRUE_EXIT_CTLS:
 432                 unsupported_ctrls = evmcs_get_unsupported_ctls(EVMCS_EXIT_CTRLS);
 433                 if (!evmcs_has_perf_global_ctrl(vcpu))
 434                         unsupported_ctrls |= VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL;
 435                 ctl_high &= ~unsupported_ctrls;
 436                 break;
 437         case MSR_IA32_VMX_ENTRY_CTLS:
 438         case MSR_IA32_VMX_TRUE_ENTRY_CTLS:
 439                 unsupported_ctrls = evmcs_get_unsupported_ctls(EVMCS_ENTRY_CTRLS);
 440                 if (!evmcs_has_perf_global_ctrl(vcpu))
 441                         unsupported_ctrls |= VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL;
 442                 ctl_high &= ~unsupported_ctrls;
 443                 break;
 444         case MSR_IA32_VMX_PROCBASED_CTLS2:
 445                 ctl_high &= ~evmcs_get_unsupported_ctls(EVMCS_2NDEXEC);
 446                 break;
 447         case MSR_IA32_VMX_TRUE_PINBASED_CTLS:
 448         case MSR_IA32_VMX_PINBASED_CTLS:
 449                 ctl_high &= ~evmcs_get_unsupported_ctls(EVMCS_PINCTRL);
 450                 break;
 451         case MSR_IA32_VMX_VMFUNC:
 452                 ctl_low &= ~evmcs_get_unsupported_ctls(EVMCS_VMFUNC);
 453                 break;
 454         }
 455
 456         *pdata = ctl_low | ((u64)ctl_high << 32);
 457 }
 458
 459 static bool nested_evmcs_is_valid_controls(enum evmcs_ctrl_type ctrl_type,
 460                                            u32 val)
 461 {
 462         return !(val & evmcs_get_unsupported_ctls(ctrl_type));
 463 }
 464
 465 int nested_evmcs_check_controls(struct vmcs12 *vmcs12)
 466 {
 467         if (CC(!nested_evmcs_is_valid_controls(EVMCS_PINCTRL,
 468                                                vmcs12->pin_based_vm_exec_control)))
 469                 return -EINVAL;
 470
 471         if (CC(!nested_evmcs_is_valid_controls(EVMCS_2NDEXEC,
 472                                                vmcs12->secondary_vm_exec_control)))
 473                 return -EINVAL;
 474
 475         if (CC(!nested_evmcs_is_valid_controls(EVMCS_EXIT_CTRLS,
 476                                                vmcs12->vm_exit_controls)))
 477                 return -EINVAL;
 478
 479         if (CC(!nested_evmcs_is_valid_controls(EVMCS_ENTRY_CTRLS,
 480                                                vmcs12->vm_entry_controls)))
 481                 return -EINVAL;
 482
 483         /*
 484          * VM-Func controls are 64-bit, but KVM currently doesn't support any
 485          * controls in bits 63:32, i.e. dropping those bits on the consistency
 486          * check is intentional.
 487          */
 488         if (WARN_ON_ONCE(vmcs12->vm_function_control >> 32))
 489                 return -EINVAL;
 490
 491         if (CC(!nested_evmcs_is_valid_controls(EVMCS_VMFUNC,
 492                                                vmcs12->vm_function_control)))
 493                 return -EINVAL;
 494
 495         return 0;
 496 }
 497
 498 int nested_enable_evmcs(struct kvm_vcpu *vcpu,
 499                         uint16_t *vmcs_version)
 500 {
 501         struct vcpu_vmx *vmx = to_vmx(vcpu);
 502
 503         vmx->nested.enlightened_vmcs_enabled = true;
 504
 505         if (vmcs_version)
 506                 *vmcs_version = nested_get_evmcs_version(vcpu);
 507
 508         return 0;
 509 }