MSR_IA32_EFER_REGISTER Union Reference

Data Fields
struct {
UINT32   SCE:1
UINT32   Reserved1:7
UINT32   LME:1
UINT32   Reserved2:1
UINT32   LMA:1
UINT32   NXE:1
UINT32   Reserved3:20
UINT32   Reserved4:32
}	Bits
UINT32	Uint32
UINT64	Uint64

Detailed Description

MSR information returned for MSR index MSR_IA32_EFER

Field Documentation

struct { ... } MSR_IA32_EFER_REGISTER::Bits

Individual bit fields

UINT32 MSR_IA32_EFER_REGISTER::LMA

[Bit 10] IA-32e Mode Active: IA32_EFER.LMA (R) Indicates IA-32e mode is active when set.

UINT32 MSR_IA32_EFER_REGISTER::LME

[Bit 8] IA-32e Mode Enable: IA32_EFER.LME (R/W) Enables IA-32e mode operation.

UINT32 MSR_IA32_EFER_REGISTER::NXE

[Bit 11] Execute Disable Bit Enable: IA32_EFER.NXE (R/W).

UINT32 MSR_IA32_EFER_REGISTER::Reserved1

UINT32 MSR_IA32_EFER_REGISTER::Reserved2

UINT32 MSR_IA32_EFER_REGISTER::Reserved3

UINT32 MSR_IA32_EFER_REGISTER::Reserved4

UINT32 MSR_IA32_EFER_REGISTER::SCE

[Bit 0] SYSCALL Enable: IA32_EFER.SCE (R/W) Enables SYSCALL/SYSRET instructions in 64-bit mode.

UINT32 MSR_IA32_EFER_REGISTER::Uint32

All bit fields as a 32-bit value

UINT64 MSR_IA32_EFER_REGISTER::Uint64

All bit fields as a 64-bit value