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linux_dsm_epyc7002/arch/x86/include/uapi/asm/kvm.h
Jim Mattson 59073aaf6d kvm: x86: Add exception payload fields to kvm_vcpu_events 
The per-VM capability KVM_CAP_EXCEPTION_PAYLOAD (to be introduced in a
later commit) adds the following fields to struct kvm_vcpu_events:
exception_has_payload, exception_payload, and exception.pending.

With this capability set, all of the details of vcpu->arch.exception,
including the payload for a pending exception, are reported to
userspace in response to KVM_GET_VCPU_EVENTS.

With this capability clear, the original ABI is preserved, and the
exception.injected field is set for either pending or injected
exceptions.

When userspace calls KVM_SET_VCPU_EVENTS with
KVM_CAP_EXCEPTION_PAYLOAD clear, exception.injected is no longer
translated to exception.pending. KVM_SET_VCPU_EVENTS can now only
establish a pending exception when KVM_CAP_EXCEPTION_PAYLOAD is set.

Reported-by: Jim Mattson <jmattson@google.com>
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-10-17 19:07:38 +02:00

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/* 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
#define KVM_VCPUEVENT_VALID_PAYLOAD 0x00000010
/* 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 pending;
__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;
__u8 reserved[27];
__u8 exception_has_payload;
__u64 exception_payload;
};
/* 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_X86_QUIRK_LAPIC_MMIO_HOLE (1 << 2)
#define KVM_STATE_NESTED_GUEST_MODE 0x00000001
#define KVM_STATE_NESTED_RUN_PENDING 0x00000002
#define KVM_STATE_NESTED_EVMCS 0x00000004
#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 */
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