tools/arch/x86/include/uapi/asm/kvm.h - linux - Git at Google

 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 #ifndef _ASM_X86_KVM_H
 #define _ASM_X86_KVM_H

 /*
  * KVM x86 specific structures and definitions
  *
  */

 #include <linux/types.h>
 #include <linux/ioctl.h>

 #define KVM_PIO_PAGE_OFFSET 1
 #define KVM_COALESCED_MMIO_PAGE_OFFSET 2

 #define DE_VECTOR 0
 #define DB_VECTOR 1
 #define BP_VECTOR 3
 #define OF_VECTOR 4
 #define BR_VECTOR 5
 #define UD_VECTOR 6
 #define NM_VECTOR 7
 #define DF_VECTOR 8
 #define TS_VECTOR 10
 #define NP_VECTOR 11
 #define SS_VECTOR 12
 #define GP_VECTOR 13
 #define PF_VECTOR 14
 #define MF_VECTOR 16
 #define AC_VECTOR 17
 #define MC_VECTOR 18
 #define XM_VECTOR 19
 #define VE_VECTOR 20

 /* Select x86 specific features in <linux/kvm.h> */
 #define __KVM_HAVE_PIT
 #define __KVM_HAVE_IOAPIC
 #define __KVM_HAVE_IRQ_LINE
 #define __KVM_HAVE_MSI
 #define __KVM_HAVE_USER_NMI
 #define __KVM_HAVE_GUEST_DEBUG
 #define __KVM_HAVE_MSIX
 #define __KVM_HAVE_MCE
 #define __KVM_HAVE_PIT_STATE2
 #define __KVM_HAVE_XEN_HVM
 #define __KVM_HAVE_VCPU_EVENTS
 #define __KVM_HAVE_DEBUGREGS
 #define __KVM_HAVE_XSAVE
 #define __KVM_HAVE_XCRS
 #define __KVM_HAVE_READONLY_MEM

 /* Architectural interrupt line count. */
 #define KVM_NR_INTERRUPTS 256

 struct kvm_memory_alias {
 	__u32 slot;  /* this has a different namespace than memory slots */
 	__u32 flags;
 	__u64 guest_phys_addr;
 	__u64 memory_size;
 	__u64 target_phys_addr;
 };

 /* for KVM_GET_IRQCHIP and KVM_SET_IRQCHIP */
 struct kvm_pic_state {
 	__u8 last_irr;	/* edge detection */
 	__u8 irr;		/* interrupt request register */
 	__u8 imr;		/* interrupt mask register */
 	__u8 isr;		/* interrupt service register */
 	__u8 priority_add;	/* highest irq priority */
 	__u8 irq_base;
 	__u8 read_reg_select;
 	__u8 poll;
 	__u8 special_mask;
 	__u8 init_state;
 	__u8 auto_eoi;
 	__u8 rotate_on_auto_eoi;
 	__u8 special_fully_nested_mode;
 	__u8 init4;		/* true if 4 byte init */
 	__u8 elcr;		/* PIIX edge/trigger selection */
 	__u8 elcr_mask;
 };

 #define KVM_IOAPIC_NUM_PINS  24
 struct kvm_ioapic_state {
 	__u64 base_address;
 	__u32 ioregsel;
 	__u32 id;
 	__u32 irr;
 	__u32 pad;
 	union {
 		__u64 bits;
 		struct {
 			__u8 vector;
 			__u8 delivery_mode:3;
 			__u8 dest_mode:1;
 			__u8 delivery_status:1;
 			__u8 polarity:1;
 			__u8 remote_irr:1;
 			__u8 trig_mode:1;
 			__u8 mask:1;
 			__u8 reserve:7;
 			__u8 reserved[4];
 			__u8 dest_id;
 		} fields;
 	} redirtbl[KVM_IOAPIC_NUM_PINS];
 };

 #define KVM_IRQCHIP_PIC_MASTER   0
 #define KVM_IRQCHIP_PIC_SLAVE    1
 #define KVM_IRQCHIP_IOAPIC       2
 #define KVM_NR_IRQCHIPS          3

 #define KVM_RUN_X86_SMM		 (1 << 0)

 /* for KVM_GET_REGS and KVM_SET_REGS */
 struct kvm_regs {
 	/* out (KVM_GET_REGS) / in (KVM_SET_REGS) */
 	__u64 rax, rbx, rcx, rdx;
 	__u64 rsi, rdi, rsp, rbp;
 	__u64 r8,  r9,  r10, r11;
 	__u64 r12, r13, r14, r15;
 	__u64 rip, rflags;
 };

 /* for KVM_GET_LAPIC and KVM_SET_LAPIC */
 #define KVM_APIC_REG_SIZE 0x400
 struct kvm_lapic_state {
 	char regs[KVM_APIC_REG_SIZE];
 };

 struct kvm_segment {
 	__u64 base;
 	__u32 limit;
 	__u16 selector;
 	__u8  type;
 	__u8  present, dpl, db, s, l, g, avl;
 	__u8  unusable;
 	__u8  padding;
 };

 struct kvm_dtable {
 	__u64 base;
 	__u16 limit;
 	__u16 padding[3];
 };


 /* for KVM_GET_SREGS and KVM_SET_SREGS */
 struct kvm_sregs {
 	/* out (KVM_GET_SREGS) / in (KVM_SET_SREGS) */
 	struct kvm_segment cs, ds, es, fs, gs, ss;
 	struct kvm_segment tr, ldt;
 	struct kvm_dtable gdt, idt;
 	__u64 cr0, cr2, cr3, cr4, cr8;
 	__u64 efer;
 	__u64 apic_base;
 	__u64 interrupt_bitmap[(KVM_NR_INTERRUPTS + 63) / 64];
 };

 /* for KVM_GET_FPU and KVM_SET_FPU */
 struct kvm_fpu {
 	__u8  fpr[8][16];
 	__u16 fcw;
 	__u16 fsw;
 	__u8  ftwx;  /* in fxsave format */
 	__u8  pad1;
 	__u16 last_opcode;
 	__u64 last_ip;
 	__u64 last_dp;
 	__u8  xmm[16][16];
 	__u32 mxcsr;
 	__u32 pad2;
 };

 struct kvm_msr_entry {
 	__u32 index;
 	__u32 reserved;
 	__u64 data;
 };

 /* for KVM_GET_MSRS and KVM_SET_MSRS */
 struct kvm_msrs {
 	__u32 nmsrs; /* number of msrs in entries */
 	__u32 pad;

 	struct kvm_msr_entry entries[0];
 };

 /* for KVM_GET_MSR_INDEX_LIST */
 struct kvm_msr_list {
 	__u32 nmsrs; /* number of msrs in entries */
 	__u32 indices[0];
 };


 struct kvm_cpuid_entry {
 	__u32 function;
 	__u32 eax;
 	__u32 ebx;
 	__u32 ecx;
 	__u32 edx;
 	__u32 padding;
 };

 /* for KVM_SET_CPUID */
 struct kvm_cpuid {
 	__u32 nent;
 	__u32 padding;
 	struct kvm_cpuid_entry entries[0];
 };

 struct kvm_cpuid_entry2 {
 	__u32 function;
 	__u32 index;
 	__u32 flags;
 	__u32 eax;
 	__u32 ebx;
 	__u32 ecx;
 	__u32 edx;
 	__u32 padding[3];
 };

 #define KVM_CPUID_FLAG_SIGNIFCANT_INDEX		(1 << 0)
 #define KVM_CPUID_FLAG_STATEFUL_FUNC		(1 << 1)
 #define KVM_CPUID_FLAG_STATE_READ_NEXT		(1 << 2)

 /* for KVM_SET_CPUID2 */
 struct kvm_cpuid2 {
 	__u32 nent;
 	__u32 padding;
 	struct kvm_cpuid_entry2 entries[0];
 };

 /* for KVM_GET_PIT and KVM_SET_PIT */
 struct kvm_pit_channel_state {
 	__u32 count; /* can be 65536 */
 	__u16 latched_count;
 	__u8 count_latched;
 	__u8 status_latched;
 	__u8 status;
 	__u8 read_state;
 	__u8 write_state;
 	__u8 write_latch;
 	__u8 rw_mode;
 	__u8 mode;
 	__u8 bcd;
 	__u8 gate;
 	__s64 count_load_time;
 };

 struct kvm_debug_exit_arch {
 	__u32 exception;
 	__u32 pad;
 	__u64 pc;
 	__u64 dr6;
 	__u64 dr7;
 };

 #define KVM_GUESTDBG_USE_SW_BP		0x00010000
 #define KVM_GUESTDBG_USE_HW_BP		0x00020000
 #define KVM_GUESTDBG_INJECT_DB		0x00040000
 #define KVM_GUESTDBG_INJECT_BP		0x00080000

 /* for KVM_SET_GUEST_DEBUG */
 struct kvm_guest_debug_arch {
 	__u64 debugreg[8];
 };

 struct kvm_pit_state {
 	struct kvm_pit_channel_state channels[3];
 };

 #define KVM_PIT_FLAGS_HPET_LEGACY  0x00000001

 struct kvm_pit_state2 {
 	struct kvm_pit_channel_state channels[3];
 	__u32 flags;
 	__u32 reserved[9];
 };

 struct kvm_reinject_control {
 	__u8 pit_reinject;
 	__u8 reserved[31];
 };

 /* When set in flags, include corresponding fields on KVM_SET_VCPU_EVENTS */
 #define KVM_VCPUEVENT_VALID_NMI_PENDING	0x00000001
 #define KVM_VCPUEVENT_VALID_SIPI_VECTOR	0x00000002
 #define KVM_VCPUEVENT_VALID_SHADOW	0x00000004
 #define KVM_VCPUEVENT_VALID_SMM		0x00000008

 /* Interrupt shadow states */
 #define KVM_X86_SHADOW_INT_MOV_SS	0x01
 #define KVM_X86_SHADOW_INT_STI		0x02

 /* for KVM_GET/SET_VCPU_EVENTS */
 struct kvm_vcpu_events {
 	struct {
 		__u8 injected;
 		__u8 nr;
 		__u8 has_error_code;
 		__u8 pad;
 		__u32 error_code;
 	} exception;
 	struct {
 		__u8 injected;
 		__u8 nr;
 		__u8 soft;
 		__u8 shadow;
 	} interrupt;
 	struct {
 		__u8 injected;
 		__u8 pending;
 		__u8 masked;
 		__u8 pad;
 	} nmi;
 	__u32 sipi_vector;
 	__u32 flags;
 	struct {
 		__u8 smm;
 		__u8 pending;
 		__u8 smm_inside_nmi;
 		__u8 latched_init;
 	} smi;
 	__u32 reserved[9];
 };

 /* for KVM_GET/SET_DEBUGREGS */
 struct kvm_debugregs {
 	__u64 db[4];
 	__u64 dr6;
 	__u64 dr7;
 	__u64 flags;
 	__u64 reserved[9];
 };

 /* for KVM_CAP_XSAVE */
 struct kvm_xsave {
 	__u32 region[1024];
 };

 #define KVM_MAX_XCRS	16

 struct kvm_xcr {
 	__u32 xcr;
 	__u32 reserved;
 	__u64 value;
 };

 struct kvm_xcrs {
 	__u32 nr_xcrs;
 	__u32 flags;
 	struct kvm_xcr xcrs[KVM_MAX_XCRS];
 	__u64 padding[16];
 };

 #define KVM_SYNC_X86_REGS      (1UL << 0)
 #define KVM_SYNC_X86_SREGS     (1UL << 1)
 #define KVM_SYNC_X86_EVENTS    (1UL << 2)

 #define KVM_SYNC_X86_VALID_FIELDS \
 	(KVM_SYNC_X86_REGS| \
 	 KVM_SYNC_X86_SREGS| \
 	 KVM_SYNC_X86_EVENTS)

 /* kvm_sync_regs struct included by kvm_run struct */
 struct kvm_sync_regs {
 	/* Members of this structure are potentially malicious.
 	 * Care must be taken by code reading, esp. interpreting,
 	 * data fields from them inside KVM to prevent TOCTOU and
 	 * double-fetch types of vulnerabilities.
 	 */
 	struct kvm_regs regs;
 	struct kvm_sregs sregs;
 	struct kvm_vcpu_events events;
 };

 #define KVM_X86_QUIRK_LINT0_REENABLED	(1 << 0)
 #define KVM_X86_QUIRK_CD_NW_CLEARED	(1 << 1)

 #define KVM_STATE_NESTED_GUEST_MODE	0x00000001
 #define KVM_STATE_NESTED_RUN_PENDING	0x00000002

 #define KVM_STATE_NESTED_SMM_GUEST_MODE	0x00000001
 #define KVM_STATE_NESTED_SMM_VMXON	0x00000002

 struct kvm_vmx_nested_state {
 	__u64 vmxon_pa;
 	__u64 vmcs_pa;

 	struct {
 		__u16 flags;
 	} smm;
 };

 /* for KVM_CAP_NESTED_STATE */
 struct kvm_nested_state {
 	/* KVM_STATE_* flags */
 	__u16 flags;

 	/* 0 for VMX, 1 for SVM.  */
 	__u16 format;

 	/* 128 for SVM, 128 + VMCS size for VMX.  */
 	__u32 size;

 	union {
 		/* VMXON, VMCS */
 		struct kvm_vmx_nested_state vmx;

 		/* Pad the header to 128 bytes.  */
 		__u8 pad[120];
 	};

 	__u8 data[0];
 };

 #endif /* _ASM_X86_KVM_H */
	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
	#ifndef _ASM_X86_KVM_H
	#define _ASM_X86_KVM_H

	/*
	* KVM x86 specific structures and definitions
	*
	*/

	#include <linux/types.h>
	#include <linux/ioctl.h>

	#define KVM_PIO_PAGE_OFFSET 1
	#define KVM_COALESCED_MMIO_PAGE_OFFSET 2

	#define DE_VECTOR 0
	#define DB_VECTOR 1
	#define BP_VECTOR 3
	#define OF_VECTOR 4
	#define BR_VECTOR 5
	#define UD_VECTOR 6
	#define NM_VECTOR 7
	#define DF_VECTOR 8
	#define TS_VECTOR 10
	#define NP_VECTOR 11
	#define SS_VECTOR 12
	#define GP_VECTOR 13
	#define PF_VECTOR 14
	#define MF_VECTOR 16
	#define AC_VECTOR 17
	#define MC_VECTOR 18
	#define XM_VECTOR 19
	#define VE_VECTOR 20

	/* Select x86 specific features in <linux/kvm.h> */
	#define __KVM_HAVE_PIT
	#define __KVM_HAVE_IOAPIC
	#define __KVM_HAVE_IRQ_LINE
	#define __KVM_HAVE_MSI
	#define __KVM_HAVE_USER_NMI
	#define __KVM_HAVE_GUEST_DEBUG
	#define __KVM_HAVE_MSIX
	#define __KVM_HAVE_MCE
	#define __KVM_HAVE_PIT_STATE2
	#define __KVM_HAVE_XEN_HVM
	#define __KVM_HAVE_VCPU_EVENTS
	#define __KVM_HAVE_DEBUGREGS
	#define __KVM_HAVE_XSAVE
	#define __KVM_HAVE_XCRS
	#define __KVM_HAVE_READONLY_MEM

	/* Architectural interrupt line count. */
	#define KVM_NR_INTERRUPTS 256

	struct kvm_memory_alias {
	__u32 slot; /* this has a different namespace than memory slots */
	__u32 flags;
	__u64 guest_phys_addr;
	__u64 memory_size;
	__u64 target_phys_addr;
	};

	/* for KVM_GET_IRQCHIP and KVM_SET_IRQCHIP */
	struct kvm_pic_state {
	__u8 last_irr; /* edge detection */
	__u8 irr; /* interrupt request register */
	__u8 imr; /* interrupt mask register */
	__u8 isr; /* interrupt service register */
	__u8 priority_add; /* highest irq priority */
	__u8 irq_base;
	__u8 read_reg_select;
	__u8 poll;
	__u8 special_mask;
	__u8 init_state;
	__u8 auto_eoi;
	__u8 rotate_on_auto_eoi;
	__u8 special_fully_nested_mode;
	__u8 init4; /* true if 4 byte init */
	__u8 elcr; /* PIIX edge/trigger selection */
	__u8 elcr_mask;
	};

	#define KVM_IOAPIC_NUM_PINS 24
	struct kvm_ioapic_state {
	__u64 base_address;
	__u32 ioregsel;
	__u32 id;
	__u32 irr;
	__u32 pad;
	union {
	__u64 bits;
	struct {
	__u8 vector;
	__u8 delivery_mode:3;
	__u8 dest_mode:1;
	__u8 delivery_status:1;
	__u8 polarity:1;
	__u8 remote_irr:1;
	__u8 trig_mode:1;
	__u8 mask:1;
	__u8 reserve:7;
	__u8 reserved[4];
	__u8 dest_id;
	} fields;
	} redirtbl[KVM_IOAPIC_NUM_PINS];
	};

	#define KVM_IRQCHIP_PIC_MASTER 0
	#define KVM_IRQCHIP_PIC_SLAVE 1
	#define KVM_IRQCHIP_IOAPIC 2
	#define KVM_NR_IRQCHIPS 3

	#define KVM_RUN_X86_SMM (1 << 0)

	/* for KVM_GET_REGS and KVM_SET_REGS */
	struct kvm_regs {
	/* out (KVM_GET_REGS) / in (KVM_SET_REGS) */
	__u64 rax, rbx, rcx, rdx;
	__u64 rsi, rdi, rsp, rbp;
	__u64 r8, r9, r10, r11;
	__u64 r12, r13, r14, r15;
	__u64 rip, rflags;
	};

	/* for KVM_GET_LAPIC and KVM_SET_LAPIC */
	#define KVM_APIC_REG_SIZE 0x400
	struct kvm_lapic_state {
	char regs[KVM_APIC_REG_SIZE];
	};

	struct kvm_segment {
	__u64 base;
	__u32 limit;
	__u16 selector;
	__u8 type;
	__u8 present, dpl, db, s, l, g, avl;
	__u8 unusable;
	__u8 padding;
	};

	struct kvm_dtable {
	__u64 base;
	__u16 limit;
	__u16 padding[3];
	};


	/* for KVM_GET_SREGS and KVM_SET_SREGS */
	struct kvm_sregs {
	/* out (KVM_GET_SREGS) / in (KVM_SET_SREGS) */
	struct kvm_segment cs, ds, es, fs, gs, ss;
	struct kvm_segment tr, ldt;
	struct kvm_dtable gdt, idt;
	__u64 cr0, cr2, cr3, cr4, cr8;
	__u64 efer;
	__u64 apic_base;
	__u64 interrupt_bitmap[(KVM_NR_INTERRUPTS + 63) / 64];
	};

	/* for KVM_GET_FPU and KVM_SET_FPU */
	struct kvm_fpu {
	__u8 fpr[8][16];
	__u16 fcw;
	__u16 fsw;
	__u8 ftwx; /* in fxsave format */
	__u8 pad1;
	__u16 last_opcode;
	__u64 last_ip;
	__u64 last_dp;
	__u8 xmm[16][16];
	__u32 mxcsr;
	__u32 pad2;
	};

	struct kvm_msr_entry {
	__u32 index;
	__u32 reserved;
	__u64 data;
	};

	/* for KVM_GET_MSRS and KVM_SET_MSRS */
	struct kvm_msrs {
	__u32 nmsrs; /* number of msrs in entries */
	__u32 pad;

	struct kvm_msr_entry entries[0];
	};

	/* for KVM_GET_MSR_INDEX_LIST */
	struct kvm_msr_list {
	__u32 nmsrs; /* number of msrs in entries */
	__u32 indices[0];
	};


	struct kvm_cpuid_entry {
	__u32 function;
	__u32 eax;
	__u32 ebx;
	__u32 ecx;
	__u32 edx;
	__u32 padding;
	};

	/* for KVM_SET_CPUID */
	struct kvm_cpuid {
	__u32 nent;
	__u32 padding;
	struct kvm_cpuid_entry entries[0];
	};

	struct kvm_cpuid_entry2 {
	__u32 function;
	__u32 index;
	__u32 flags;
	__u32 eax;
	__u32 ebx;
	__u32 ecx;
	__u32 edx;
	__u32 padding[3];
	};

	#define KVM_CPUID_FLAG_SIGNIFCANT_INDEX (1 << 0)
	#define KVM_CPUID_FLAG_STATEFUL_FUNC (1 << 1)
	#define KVM_CPUID_FLAG_STATE_READ_NEXT (1 << 2)

	/* for KVM_SET_CPUID2 */
	struct kvm_cpuid2 {
	__u32 nent;
	__u32 padding;
	struct kvm_cpuid_entry2 entries[0];
	};

	/* for KVM_GET_PIT and KVM_SET_PIT */
	struct kvm_pit_channel_state {
	__u32 count; /* can be 65536 */
	__u16 latched_count;
	__u8 count_latched;
	__u8 status_latched;
	__u8 status;
	__u8 read_state;
	__u8 write_state;
	__u8 write_latch;
	__u8 rw_mode;
	__u8 mode;
	__u8 bcd;
	__u8 gate;
	__s64 count_load_time;
	};

	struct kvm_debug_exit_arch {
	__u32 exception;
	__u32 pad;
	__u64 pc;
	__u64 dr6;
	__u64 dr7;
	};

	#define KVM_GUESTDBG_USE_SW_BP 0x00010000
	#define KVM_GUESTDBG_USE_HW_BP 0x00020000
	#define KVM_GUESTDBG_INJECT_DB 0x00040000
	#define KVM_GUESTDBG_INJECT_BP 0x00080000

	/* for KVM_SET_GUEST_DEBUG */
	struct kvm_guest_debug_arch {
	__u64 debugreg[8];
	};

	struct kvm_pit_state {
	struct kvm_pit_channel_state channels[3];
	};

	#define KVM_PIT_FLAGS_HPET_LEGACY 0x00000001

	struct kvm_pit_state2 {
	struct kvm_pit_channel_state channels[3];
	__u32 flags;
	__u32 reserved[9];
	};

	struct kvm_reinject_control {
	__u8 pit_reinject;
	__u8 reserved[31];
	};

	/* When set in flags, include corresponding fields on KVM_SET_VCPU_EVENTS */
	#define KVM_VCPUEVENT_VALID_NMI_PENDING 0x00000001
	#define KVM_VCPUEVENT_VALID_SIPI_VECTOR 0x00000002
	#define KVM_VCPUEVENT_VALID_SHADOW 0x00000004
	#define KVM_VCPUEVENT_VALID_SMM 0x00000008

	/* Interrupt shadow states */
	#define KVM_X86_SHADOW_INT_MOV_SS 0x01
	#define KVM_X86_SHADOW_INT_STI 0x02

	/* for KVM_GET/SET_VCPU_EVENTS */
	struct kvm_vcpu_events {
	struct {
	__u8 injected;
	__u8 nr;
	__u8 has_error_code;
	__u8 pad;
	__u32 error_code;
	} exception;
	struct {
	__u8 injected;
	__u8 nr;
	__u8 soft;
	__u8 shadow;
	} interrupt;
	struct {
	__u8 injected;
	__u8 pending;
	__u8 masked;
	__u8 pad;
	} nmi;
	__u32 sipi_vector;
	__u32 flags;
	struct {
	__u8 smm;
	__u8 pending;
	__u8 smm_inside_nmi;
	__u8 latched_init;
	} smi;
	__u32 reserved[9];
	};

	/* for KVM_GET/SET_DEBUGREGS */
	struct kvm_debugregs {
	__u64 db[4];
	__u64 dr6;
	__u64 dr7;
	__u64 flags;
	__u64 reserved[9];
	};

	/* for KVM_CAP_XSAVE */
	struct kvm_xsave {
	__u32 region[1024];
	};

	#define KVM_MAX_XCRS 16

	struct kvm_xcr {
	__u32 xcr;
	__u32 reserved;
	__u64 value;
	};

	struct kvm_xcrs {
	__u32 nr_xcrs;
	__u32 flags;
	struct kvm_xcr xcrs[KVM_MAX_XCRS];
	__u64 padding[16];
	};

	#define KVM_SYNC_X86_REGS (1UL << 0)
	#define KVM_SYNC_X86_SREGS (1UL << 1)
	#define KVM_SYNC_X86_EVENTS (1UL << 2)

	#define KVM_SYNC_X86_VALID_FIELDS \
	(KVM_SYNC_X86_REGS\| \
	KVM_SYNC_X86_SREGS\| \
	KVM_SYNC_X86_EVENTS)

	/* kvm_sync_regs struct included by kvm_run struct */
	struct kvm_sync_regs {
	/* Members of this structure are potentially malicious.
	* Care must be taken by code reading, esp. interpreting,
	* data fields from them inside KVM to prevent TOCTOU and
	* double-fetch types of vulnerabilities.
	*/
	struct kvm_regs regs;
	struct kvm_sregs sregs;
	struct kvm_vcpu_events events;
	};

	#define KVM_X86_QUIRK_LINT0_REENABLED (1 << 0)
	#define KVM_X86_QUIRK_CD_NW_CLEARED (1 << 1)

	#define KVM_STATE_NESTED_GUEST_MODE 0x00000001
	#define KVM_STATE_NESTED_RUN_PENDING 0x00000002

	#define KVM_STATE_NESTED_SMM_GUEST_MODE 0x00000001
	#define KVM_STATE_NESTED_SMM_VMXON 0x00000002

	struct kvm_vmx_nested_state {
	__u64 vmxon_pa;
	__u64 vmcs_pa;

	struct {
	__u16 flags;
	} smm;
	};

	/* for KVM_CAP_NESTED_STATE */
	struct kvm_nested_state {
	/* KVM_STATE_* flags */
	__u16 flags;

	/* 0 for VMX, 1 for SVM. */
	__u16 format;

	/* 128 for SVM, 128 + VMCS size for VMX. */
	__u32 size;

	union {
	/* VMXON, VMCS */
	struct kvm_vmx_nested_state vmx;

	/* Pad the header to 128 bytes. */
	__u8 pad[120];
	};

	__u8 data[0];
	};

	#endif /* _ASM_X86_KVM_H */