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