linux-headers/asm-x86/kvm.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 #ifndef _ASM_X86_KVM_H
   3 #define _ASM_X86_KVM_H
   4
   5 /*
   6  * KVM x86 specific structures and definitions
   7  *
   8  */
   9
  10 #include <linux/types.h>
  11 #include <linux/ioctl.h>
  12 #include <linux/stddef.h>
  13
  14 #define KVM_PIO_PAGE_OFFSET 1
  15 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2
  16 #define KVM_DIRTY_LOG_PAGE_OFFSET 64
  17
  18 #define DE_VECTOR 0
  19 #define DB_VECTOR 1
  20 #define BP_VECTOR 3
  21 #define OF_VECTOR 4
  22 #define BR_VECTOR 5
  23 #define UD_VECTOR 6
  24 #define NM_VECTOR 7
  25 #define DF_VECTOR 8
  26 #define TS_VECTOR 10
  27 #define NP_VECTOR 11
  28 #define SS_VECTOR 12
  29 #define GP_VECTOR 13
  30 #define PF_VECTOR 14
  31 #define MF_VECTOR 16
  32 #define AC_VECTOR 17
  33 #define MC_VECTOR 18
  34 #define XM_VECTOR 19
  35 #define VE_VECTOR 20
  36
  37 /* Select x86 specific features in <linux/kvm.h> */
  38 #define __KVM_HAVE_PIT
  39 #define __KVM_HAVE_IOAPIC
  40 #define __KVM_HAVE_IRQ_LINE
  41 #define __KVM_HAVE_MSI
  42 #define __KVM_HAVE_USER_NMI
  43 #define __KVM_HAVE_GUEST_DEBUG
  44 #define __KVM_HAVE_MSIX
  45 #define __KVM_HAVE_MCE
  46 #define __KVM_HAVE_PIT_STATE2
  47 #define __KVM_HAVE_XEN_HVM
  48 #define __KVM_HAVE_VCPU_EVENTS
  49 #define __KVM_HAVE_DEBUGREGS
  50 #define __KVM_HAVE_XSAVE
  51 #define __KVM_HAVE_XCRS
  52 #define __KVM_HAVE_READONLY_MEM
  53
  54 /* Architectural interrupt line count. */
  55 #define KVM_NR_INTERRUPTS 256
  56
  57 /* for KVM_GET_IRQCHIP and KVM_SET_IRQCHIP */
  58 struct kvm_pic_state {
  59         __u8 last_irr;  /* edge detection */
  60         __u8 irr;               /* interrupt request register */
  61         __u8 imr;               /* interrupt mask register */
  62         __u8 isr;               /* interrupt service register */
  63         __u8 priority_add;      /* highest irq priority */
  64         __u8 irq_base;
  65         __u8 read_reg_select;
  66         __u8 poll;
  67         __u8 special_mask;
  68         __u8 init_state;
  69         __u8 auto_eoi;
  70         __u8 rotate_on_auto_eoi;
  71         __u8 special_fully_nested_mode;
  72         __u8 init4;             /* true if 4 byte init */
  73         __u8 elcr;              /* PIIX edge/trigger selection */
  74         __u8 elcr_mask;
  75 };
  76
  77 #define KVM_IOAPIC_NUM_PINS  24
  78 struct kvm_ioapic_state {
  79         __u64 base_address;
  80         __u32 ioregsel;
  81         __u32 id;
  82         __u32 irr;
  83         __u32 pad;
  84         union {
  85                 __u64 bits;
  86                 struct {
  87                         __u8 vector;
  88                         __u8 delivery_mode:3;
  89                         __u8 dest_mode:1;
  90                         __u8 delivery_status:1;
  91                         __u8 polarity:1;
  92                         __u8 remote_irr:1;
  93                         __u8 trig_mode:1;
  94                         __u8 mask:1;
  95                         __u8 reserve:7;
  96                         __u8 reserved[4];
  97                         __u8 dest_id;
  98                 } fields;
  99         } redirtbl[KVM_IOAPIC_NUM_PINS];
 100 };
 101
 102 #define KVM_IRQCHIP_PIC_MASTER   0
 103 #define KVM_IRQCHIP_PIC_SLAVE    1
 104 #define KVM_IRQCHIP_IOAPIC       2
 105 #define KVM_NR_IRQCHIPS          3
 106
 107 #define KVM_RUN_X86_SMM          (1 << 0)
 108 #define KVM_RUN_X86_BUS_LOCK     (1 << 1)
 109
 110 /* for KVM_GET_REGS and KVM_SET_REGS */
 111 struct kvm_regs {
 112         /* out (KVM_GET_REGS) / in (KVM_SET_REGS) */
 113         __u64 rax, rbx, rcx, rdx;
 114         __u64 rsi, rdi, rsp, rbp;
 115         __u64 r8,  r9,  r10, r11;
 116         __u64 r12, r13, r14, r15;
 117         __u64 rip, rflags;
 118 };
 119
 120 /* for KVM_GET_LAPIC and KVM_SET_LAPIC */
 121 #define KVM_APIC_REG_SIZE 0x400
 122 struct kvm_lapic_state {
 123         char regs[KVM_APIC_REG_SIZE];
 124 };
 125
 126 struct kvm_segment {
 127         __u64 base;
 128         __u32 limit;
 129         __u16 selector;
 130         __u8  type;
 131         __u8  present, dpl, db, s, l, g, avl;
 132         __u8  unusable;
 133         __u8  padding;
 134 };
 135
 136 struct kvm_dtable {
 137         __u64 base;
 138         __u16 limit;
 139         __u16 padding[3];
 140 };
 141
 142
 143 /* for KVM_GET_SREGS and KVM_SET_SREGS */
 144 struct kvm_sregs {
 145         /* out (KVM_GET_SREGS) / in (KVM_SET_SREGS) */
 146         struct kvm_segment cs, ds, es, fs, gs, ss;
 147         struct kvm_segment tr, ldt;
 148         struct kvm_dtable gdt, idt;
 149         __u64 cr0, cr2, cr3, cr4, cr8;
 150         __u64 efer;
 151         __u64 apic_base;
 152         __u64 interrupt_bitmap[(KVM_NR_INTERRUPTS + 63) / 64];
 153 };
 154
 155 struct kvm_sregs2 {
 156         /* out (KVM_GET_SREGS2) / in (KVM_SET_SREGS2) */
 157         struct kvm_segment cs, ds, es, fs, gs, ss;
 158         struct kvm_segment tr, ldt;
 159         struct kvm_dtable gdt, idt;
 160         __u64 cr0, cr2, cr3, cr4, cr8;
 161         __u64 efer;
 162         __u64 apic_base;
 163         __u64 flags;
 164         __u64 pdptrs[4];
 165 };
 166 #define KVM_SREGS2_FLAGS_PDPTRS_VALID 1
 167
 168 /* for KVM_GET_FPU and KVM_SET_FPU */
 169 struct kvm_fpu {
 170         __u8  fpr[8][16];
 171         __u16 fcw;
 172         __u16 fsw;
 173         __u8  ftwx;  /* in fxsave format */
 174         __u8  pad1;
 175         __u16 last_opcode;
 176         __u64 last_ip;
 177         __u64 last_dp;
 178         __u8  xmm[16][16];
 179         __u32 mxcsr;
 180         __u32 pad2;
 181 };
 182
 183 struct kvm_msr_entry {
 184         __u32 index;
 185         __u32 reserved;
 186         __u64 data;
 187 };
 188
 189 /* for KVM_GET_MSRS and KVM_SET_MSRS */
 190 struct kvm_msrs {
 191         __u32 nmsrs; /* number of msrs in entries */
 192         __u32 pad;
 193
 194         struct kvm_msr_entry entries[];
 195 };
 196
 197 /* for KVM_GET_MSR_INDEX_LIST */
 198 struct kvm_msr_list {
 199         __u32 nmsrs; /* number of msrs in entries */
 200         __u32 indices[];
 201 };
 202
 203 /* Maximum size of any access bitmap in bytes */
 204 #define KVM_MSR_FILTER_MAX_BITMAP_SIZE 0x600
 205
 206 /* for KVM_X86_SET_MSR_FILTER */
 207 struct kvm_msr_filter_range {
 208 #define KVM_MSR_FILTER_READ  (1 << 0)
 209 #define KVM_MSR_FILTER_WRITE (1 << 1)
 210 #define KVM_MSR_FILTER_RANGE_VALID_MASK (KVM_MSR_FILTER_READ | \
 211                                          KVM_MSR_FILTER_WRITE)
 212         __u32 flags;
 213         __u32 nmsrs; /* number of msrs in bitmap */
 214         __u32 base;  /* MSR index the bitmap starts at */
 215         __u8 *bitmap; /* a 1 bit allows the operations in flags, 0 denies */
 216 };
 217
 218 #define KVM_MSR_FILTER_MAX_RANGES 16
 219 struct kvm_msr_filter {
 220 #define KVM_MSR_FILTER_DEFAULT_ALLOW (0 << 0)
 221 #define KVM_MSR_FILTER_DEFAULT_DENY  (1 << 0)
 222 #define KVM_MSR_FILTER_VALID_MASK (KVM_MSR_FILTER_DEFAULT_DENY)
 223         __u32 flags;
 224         struct kvm_msr_filter_range ranges[KVM_MSR_FILTER_MAX_RANGES];
 225 };
 226
 227 struct kvm_cpuid_entry {
 228         __u32 function;
 229         __u32 eax;
 230         __u32 ebx;
 231         __u32 ecx;
 232         __u32 edx;
 233         __u32 padding;
 234 };
 235
 236 /* for KVM_SET_CPUID */
 237 struct kvm_cpuid {
 238         __u32 nent;
 239         __u32 padding;
 240         struct kvm_cpuid_entry entries[];
 241 };
 242
 243 struct kvm_cpuid_entry2 {
 244         __u32 function;
 245         __u32 index;
 246         __u32 flags;
 247         __u32 eax;
 248         __u32 ebx;
 249         __u32 ecx;
 250         __u32 edx;
 251         __u32 padding[3];
 252 };
 253
 254 #define KVM_CPUID_FLAG_SIGNIFCANT_INDEX         (1 << 0)
 255 #define KVM_CPUID_FLAG_STATEFUL_FUNC            (1 << 1)
 256 #define KVM_CPUID_FLAG_STATE_READ_NEXT          (1 << 2)
 257
 258 /* for KVM_SET_CPUID2 */
 259 struct kvm_cpuid2 {
 260         __u32 nent;
 261         __u32 padding;
 262         struct kvm_cpuid_entry2 entries[];
 263 };
 264
 265 /* for KVM_GET_PIT and KVM_SET_PIT */
 266 struct kvm_pit_channel_state {
 267         __u32 count; /* can be 65536 */
 268         __u16 latched_count;
 269         __u8 count_latched;
 270         __u8 status_latched;
 271         __u8 status;
 272         __u8 read_state;
 273         __u8 write_state;
 274         __u8 write_latch;
 275         __u8 rw_mode;
 276         __u8 mode;
 277         __u8 bcd;
 278         __u8 gate;
 279         __s64 count_load_time;
 280 };
 281
 282 struct kvm_debug_exit_arch {
 283         __u32 exception;
 284         __u32 pad;
 285         __u64 pc;
 286         __u64 dr6;
 287         __u64 dr7;
 288 };
 289
 290 #define KVM_GUESTDBG_USE_SW_BP          0x00010000
 291 #define KVM_GUESTDBG_USE_HW_BP          0x00020000
 292 #define KVM_GUESTDBG_INJECT_DB          0x00040000
 293 #define KVM_GUESTDBG_INJECT_BP          0x00080000
 294 #define KVM_GUESTDBG_BLOCKIRQ           0x00100000
 295
 296 /* for KVM_SET_GUEST_DEBUG */
 297 struct kvm_guest_debug_arch {
 298         __u64 debugreg[8];
 299 };
 300
 301 struct kvm_pit_state {
 302         struct kvm_pit_channel_state channels[3];
 303 };
 304
 305 #define KVM_PIT_FLAGS_HPET_LEGACY     0x00000001
 306 #define KVM_PIT_FLAGS_SPEAKER_DATA_ON 0x00000002
 307
 308 struct kvm_pit_state2 {
 309         struct kvm_pit_channel_state channels[3];
 310         __u32 flags;
 311         __u32 reserved[9];
 312 };
 313
 314 struct kvm_reinject_control {
 315         __u8 pit_reinject;
 316         __u8 reserved[31];
 317 };
 318
 319 /* When set in flags, include corresponding fields on KVM_SET_VCPU_EVENTS */
 320 #define KVM_VCPUEVENT_VALID_NMI_PENDING 0x00000001
 321 #define KVM_VCPUEVENT_VALID_SIPI_VECTOR 0x00000002
 322 #define KVM_VCPUEVENT_VALID_SHADOW      0x00000004
 323 #define KVM_VCPUEVENT_VALID_SMM         0x00000008
 324 #define KVM_VCPUEVENT_VALID_PAYLOAD     0x00000010
 325 #define KVM_VCPUEVENT_VALID_TRIPLE_FAULT        0x00000020
 326
 327 /* Interrupt shadow states */
 328 #define KVM_X86_SHADOW_INT_MOV_SS       0x01
 329 #define KVM_X86_SHADOW_INT_STI          0x02
 330
 331 /* for KVM_GET/SET_VCPU_EVENTS */
 332 struct kvm_vcpu_events {
 333         struct {
 334                 __u8 injected;
 335                 __u8 nr;
 336                 __u8 has_error_code;
 337                 __u8 pending;
 338                 __u32 error_code;
 339         } exception;
 340         struct {
 341                 __u8 injected;
 342                 __u8 nr;
 343                 __u8 soft;
 344                 __u8 shadow;
 345         } interrupt;
 346         struct {
 347                 __u8 injected;
 348                 __u8 pending;
 349                 __u8 masked;
 350                 __u8 pad;
 351         } nmi;
 352         __u32 sipi_vector;
 353         __u32 flags;
 354         struct {
 355                 __u8 smm;
 356                 __u8 pending;
 357                 __u8 smm_inside_nmi;
 358                 __u8 latched_init;
 359         } smi;
 360         struct {
 361                 __u8 pending;
 362         } triple_fault;
 363         __u8 reserved[26];
 364         __u8 exception_has_payload;
 365         __u64 exception_payload;
 366 };
 367
 368 /* for KVM_GET/SET_DEBUGREGS */
 369 struct kvm_debugregs {
 370         __u64 db[4];
 371         __u64 dr6;
 372         __u64 dr7;
 373         __u64 flags;
 374         __u64 reserved[9];
 375 };
 376
 377 /* for KVM_CAP_XSAVE and KVM_CAP_XSAVE2 */
 378 struct kvm_xsave {
 379         /*
 380          * KVM_GET_XSAVE2 and KVM_SET_XSAVE write and read as many bytes
 381          * as are returned by KVM_CHECK_EXTENSION(KVM_CAP_XSAVE2)
 382          * respectively, when invoked on the vm file descriptor.
 383          *
 384          * The size value returned by KVM_CHECK_EXTENSION(KVM_CAP_XSAVE2)
 385          * will always be at least 4096. Currently, it is only greater
 386          * than 4096 if a dynamic feature has been enabled with
 387          * ``arch_prctl()``, but this may change in the future.
 388          *
 389          * The offsets of the state save areas in struct kvm_xsave follow
 390          * the contents of CPUID leaf 0xD on the host.
 391          */
 392         __u32 region[1024];
 393         __u32 extra[];
 394 };
 395
 396 #define KVM_MAX_XCRS    16
 397
 398 struct kvm_xcr {
 399         __u32 xcr;
 400         __u32 reserved;
 401         __u64 value;
 402 };
 403
 404 struct kvm_xcrs {
 405         __u32 nr_xcrs;
 406         __u32 flags;
 407         struct kvm_xcr xcrs[KVM_MAX_XCRS];
 408         __u64 padding[16];
 409 };
 410
 411 #define KVM_SYNC_X86_REGS      (1UL << 0)
 412 #define KVM_SYNC_X86_SREGS     (1UL << 1)
 413 #define KVM_SYNC_X86_EVENTS    (1UL << 2)
 414
 415 #define KVM_SYNC_X86_VALID_FIELDS \
 416         (KVM_SYNC_X86_REGS| \
 417          KVM_SYNC_X86_SREGS| \
 418          KVM_SYNC_X86_EVENTS)
 419
 420 /* kvm_sync_regs struct included by kvm_run struct */
 421 struct kvm_sync_regs {
 422         /* Members of this structure are potentially malicious.
 423          * Care must be taken by code reading, esp. interpreting,
 424          * data fields from them inside KVM to prevent TOCTOU and
 425          * double-fetch types of vulnerabilities.
 426          */
 427         struct kvm_regs regs;
 428         struct kvm_sregs sregs;
 429         struct kvm_vcpu_events events;
 430 };
 431
 432 #define KVM_X86_QUIRK_LINT0_REENABLED           (1 << 0)
 433 #define KVM_X86_QUIRK_CD_NW_CLEARED             (1 << 1)
 434 #define KVM_X86_QUIRK_LAPIC_MMIO_HOLE           (1 << 2)
 435 #define KVM_X86_QUIRK_OUT_7E_INC_RIP            (1 << 3)
 436 #define KVM_X86_QUIRK_MISC_ENABLE_NO_MWAIT      (1 << 4)
 437 #define KVM_X86_QUIRK_FIX_HYPERCALL_INSN        (1 << 5)
 438 #define KVM_X86_QUIRK_MWAIT_NEVER_UD_FAULTS     (1 << 6)
 439
 440 #define KVM_STATE_NESTED_FORMAT_VMX     0
 441 #define KVM_STATE_NESTED_FORMAT_SVM     1
 442
 443 #define KVM_STATE_NESTED_GUEST_MODE     0x00000001
 444 #define KVM_STATE_NESTED_RUN_PENDING    0x00000002
 445 #define KVM_STATE_NESTED_EVMCS          0x00000004
 446 #define KVM_STATE_NESTED_MTF_PENDING    0x00000008
 447 #define KVM_STATE_NESTED_GIF_SET        0x00000100
 448
 449 #define KVM_STATE_NESTED_SMM_GUEST_MODE 0x00000001
 450 #define KVM_STATE_NESTED_SMM_VMXON      0x00000002
 451
 452 #define KVM_STATE_NESTED_VMX_VMCS_SIZE  0x1000
 453
 454 #define KVM_STATE_NESTED_SVM_VMCB_SIZE  0x1000
 455
 456 #define KVM_STATE_VMX_PREEMPTION_TIMER_DEADLINE 0x00000001
 457
 458 /* attributes for system fd (group 0) */
 459 #define KVM_X86_XCOMP_GUEST_SUPP        0
 460
 461 struct kvm_vmx_nested_state_data {
 462         __u8 vmcs12[KVM_STATE_NESTED_VMX_VMCS_SIZE];
 463         __u8 shadow_vmcs12[KVM_STATE_NESTED_VMX_VMCS_SIZE];
 464 };
 465
 466 struct kvm_vmx_nested_state_hdr {
 467         __u64 vmxon_pa;
 468         __u64 vmcs12_pa;
 469
 470         struct {
 471                 __u16 flags;
 472         } smm;
 473
 474         __u16 pad;
 475
 476         __u32 flags;
 477         __u64 preemption_timer_deadline;
 478 };
 479
 480 struct kvm_svm_nested_state_data {
 481         /* Save area only used if KVM_STATE_NESTED_RUN_PENDING.  */
 482         __u8 vmcb12[KVM_STATE_NESTED_SVM_VMCB_SIZE];
 483 };
 484
 485 struct kvm_svm_nested_state_hdr {
 486         __u64 vmcb_pa;
 487 };
 488
 489 /* for KVM_CAP_NESTED_STATE */
 490 struct kvm_nested_state {
 491         __u16 flags;
 492         __u16 format;
 493         __u32 size;
 494
 495         union {
 496                 struct kvm_vmx_nested_state_hdr vmx;
 497                 struct kvm_svm_nested_state_hdr svm;
 498
 499                 /* Pad the header to 128 bytes.  */
 500                 __u8 pad[120];
 501         } hdr;
 502
 503         /*
 504          * Define data region as 0 bytes to preserve backwards-compatability
 505          * to old definition of kvm_nested_state in order to avoid changing
 506          * KVM_{GET,PUT}_NESTED_STATE ioctl values.
 507          */
 508         union {
 509                 __DECLARE_FLEX_ARRAY(struct kvm_vmx_nested_state_data, vmx);
 510                 __DECLARE_FLEX_ARRAY(struct kvm_svm_nested_state_data, svm);
 511         } data;
 512 };
 513
 514 /* for KVM_CAP_PMU_EVENT_FILTER */
 515 struct kvm_pmu_event_filter {
 516         __u32 action;
 517         __u32 nevents;
 518         __u32 fixed_counter_bitmap;
 519         __u32 flags;
 520         __u32 pad[4];
 521         __u64 events[];
 522 };
 523
 524 #define KVM_PMU_EVENT_ALLOW 0
 525 #define KVM_PMU_EVENT_DENY 1
 526
 527 #define KVM_PMU_EVENT_FLAG_MASKED_EVENTS BIT(0)
 528 #define KVM_PMU_EVENT_FLAGS_VALID_MASK (KVM_PMU_EVENT_FLAG_MASKED_EVENTS)
 529
 530 /*
 531  * Masked event layout.
 532  * Bits   Description
 533  * ----   -----------
 534  * 7:0    event select (low bits)
 535  * 15:8   umask match
 536  * 31:16  unused
 537  * 35:32  event select (high bits)
 538  * 36:54  unused
 539  * 55     exclude bit
 540  * 63:56  umask mask
 541  */
 542
 543 #define KVM_PMU_ENCODE_MASKED_ENTRY(event_select, mask, match, exclude) \
 544         (((event_select) & 0xFFULL) | (((event_select) & 0XF00ULL) << 24) | \
 545         (((mask) & 0xFFULL) << 56) | \
 546         (((match) & 0xFFULL) << 8) | \
 547         ((__u64)(!!(exclude)) << 55))
 548
 549 #define KVM_PMU_MASKED_ENTRY_EVENT_SELECT \
 550         (GENMASK_ULL(7, 0) | GENMASK_ULL(35, 32))
 551 #define KVM_PMU_MASKED_ENTRY_UMASK_MASK         (GENMASK_ULL(63, 56))
 552 #define KVM_PMU_MASKED_ENTRY_UMASK_MATCH        (GENMASK_ULL(15, 8))
 553 #define KVM_PMU_MASKED_ENTRY_EXCLUDE            (BIT_ULL(55))
 554 #define KVM_PMU_MASKED_ENTRY_UMASK_MASK_SHIFT   (56)
 555
 556 /* for KVM_{GET,SET,HAS}_DEVICE_ATTR */
 557 #define KVM_VCPU_TSC_CTRL 0 /* control group for the timestamp counter (TSC) */
 558 #define   KVM_VCPU_TSC_OFFSET 0 /* attribute for the TSC offset */
 559
 560 /* x86-specific KVM_EXIT_HYPERCALL flags. */
 561 #define KVM_EXIT_HYPERCALL_LONG_MODE    BIT(0)
 562
 563 #define KVM_X86_DEFAULT_VM      0
 564 #define KVM_X86_SW_PROTECTED_VM 1
 565
 566 #endif /* _ASM_X86_KVM_H */