MSR_NEHALEM_PKG_CST_CONFIG_CONTROL_REGISTER Union Reference

Data Fields
struct {
UINT32   Limit:3
UINT32   Reserved1:7
UINT32   IO_MWAIT:1
UINT32   Reserved2:4
UINT32   CFGLock:1
UINT32   Reserved3:8
UINT32   InterruptFiltering:1
UINT32   C3AutoDemotion:1
UINT32   C1AutoDemotion:1
UINT32   C3Undemotion:1
UINT32   C1Undemotion:1
UINT32   CStateDemotion:1
UINT32   CStateUndemotion:1
UINT32   Reserved4:1
UINT32   Reserved5:32
}	Bits
UINT32	Uint32
UINT64	Uint64

Detailed Description

MSR information returned for MSR index MSR_NEHALEM_PKG_CST_CONFIG_CONTROL

Field Documentation

struct { ... } MSR_NEHALEM_PKG_CST_CONFIG_CONTROL_REGISTER::Bits

Individual bit fields

UINT32 MSR_NEHALEM_PKG_CST_CONFIG_CONTROL_REGISTER::C1AutoDemotion

[Bit 26] C1 state auto demotion enable (R/W) When set, the processor will conditionally demote C3/C6/C7 requests to C1 based on uncore auto-demote information.

UINT32 MSR_NEHALEM_PKG_CST_CONFIG_CONTROL_REGISTER::C1Undemotion

[Bit 28] Enable C1 Undemotion (R/W).

UINT32 MSR_NEHALEM_PKG_CST_CONFIG_CONTROL_REGISTER::C3AutoDemotion

[Bit 25] C3 state auto demotion enable (R/W) When set, the processor will conditionally demote C6/C7 requests to C3 based on uncore auto-demote information.

UINT32 MSR_NEHALEM_PKG_CST_CONFIG_CONTROL_REGISTER::C3Undemotion

[Bit 27] Enable C3 Undemotion (R/W).

UINT32 MSR_NEHALEM_PKG_CST_CONFIG_CONTROL_REGISTER::CFGLock

[Bit 15] CFG Lock (R/WO) When set, lock bits 15:0 of this register until next reset.

UINT32 MSR_NEHALEM_PKG_CST_CONFIG_CONTROL_REGISTER::CStateDemotion

[Bit 29] Package C State Demotion Enable (R/W).

UINT32 MSR_NEHALEM_PKG_CST_CONFIG_CONTROL_REGISTER::CStateUndemotion

[Bit 30] Package C State UnDemotion Enable (R/W).

UINT32 MSR_NEHALEM_PKG_CST_CONFIG_CONTROL_REGISTER::InterruptFiltering

[Bit 24] Interrupt filtering enable (R/W) When set, processor cores in a deep C-State will wake only when the event message is destined for that core. When 0, all processor cores in a deep C-State will wake for an event message.

UINT32 MSR_NEHALEM_PKG_CST_CONFIG_CONTROL_REGISTER::IO_MWAIT

[Bit 10] I/O MWAIT Redirection Enable (R/W) When set, will map IO_read instructions sent to IO register specified by MSR_PMG_IO_CAPTURE_BASE to MWAIT instructions.

UINT32 MSR_NEHALEM_PKG_CST_CONFIG_CONTROL_REGISTER::Limit

[Bits 2:0] Package C-State Limit (R/W) Specifies the lowest processor-specific C-state code name (consuming the least power). for the package. The default is set as factory-configured package C-state limit. The following C-state code name encodings are supported: 000b: C0 (no package C-sate support) 001b: C1 (Behavior is the same as 000b) 010b: C3 011b: C6 100b: C7 101b and 110b: Reserved 111: No package C-state limit. Note: This field cannot be used to limit package C-state to C3.

UINT32 MSR_NEHALEM_PKG_CST_CONFIG_CONTROL_REGISTER::Reserved1

UINT32 MSR_NEHALEM_PKG_CST_CONFIG_CONTROL_REGISTER::Reserved2

UINT32 MSR_NEHALEM_PKG_CST_CONFIG_CONTROL_REGISTER::Reserved3

UINT32 MSR_NEHALEM_PKG_CST_CONFIG_CONTROL_REGISTER::Reserved4

UINT32 MSR_NEHALEM_PKG_CST_CONFIG_CONTROL_REGISTER::Reserved5

UINT32 MSR_NEHALEM_PKG_CST_CONFIG_CONTROL_REGISTER::Uint32

All bit fields as a 32-bit value

UINT64 MSR_NEHALEM_PKG_CST_CONFIG_CONTROL_REGISTER::Uint64

All bit fields as a 64-bit value