Data Fields
struct {
UINT32 PROCHOT_Status:1

UINT32 ThermalStatus:1

UINT32 Reserved1:3

UINT32 RunningAverageThermalLimitStatus:1

UINT32 VRThermAlertStatus:1

UINT32 VRThermalDesignCurrentStatus:1

UINT32 OtherStatus:1

UINT32 Reserved2:1

UINT32 PL1Status:1

UINT32 PL2Status:1

UINT32 InefficientOperationStatus:1

UINT32 Reserved3:3

UINT32 PROCHOT_Log:1

UINT32 ThermalLog:1

UINT32 Reserved4:3

UINT32 RunningAverageThermalLimitLog:1

UINT32 VRThermAlertLog:1

UINT32 VRThermalDesignCurrentLog:1

UINT32 OtherLog:1

UINT32 Reserved5:1

UINT32 PL1Log:1

UINT32 PL2Log:1

UINT32 InefficientOperationLog:1

UINT32 Reserved6:3

UINT32 Reserved7:32

}	Bits

UINT32	Uint32

UINT64	Uint64

Detailed Description

MSR information returned for MSR index MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS

Field Documentation

struct { ... } MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::Bits

Individual bit fields

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::InefficientOperationLog

[Bit 28] Inefficient Operation Log When set, indicates that the Inefficient Operation Status bit has asserted since the log bit was last cleared. This log bit will remain set until cleared by software writing 0.

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::InefficientOperationStatus

[Bit 12] Inefficient Operation Status (R0) When set, processor graphics frequency is operating below target frequency.

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::OtherLog

[Bit 24] Other Log When set, indicates that the OTHER Status bit has asserted since the log bit was last cleared. This log bit will remain set until cleared by software writing 0.

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::OtherStatus

[Bit 8] Other Status (R0) When set, frequency is reduced due to electrical or other constraints.

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::PL1Log

[Bit 26] Package/Platform-Level PL1 Power Limiting Log When set, indicates that the Package/Platform Level PL1 Power Limiting Status bit has asserted since the log bit was last cleared. This log bit will remain set until cleared by software writing 0.

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::PL1Status

[Bit 10] Package/Platform-Level Power Limiting PL1 Status (R0) When set, frequency is reduced due to package/platform-level power limiting PL1.

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::PL2Log

[Bit 27] Package/Platform-Level PL2 Power Limiting Log When set, indicates that the Package/Platform Level PL2 Power Limiting Status bit has asserted since the log bit was last cleared. This log bit will remain set until cleared by software writing 0.

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::PL2Status

[Bit 11] Package/Platform-Level PL2 Power Limiting Status (R0) When set, frequency is reduced due to package/platform-level power limiting PL2/PL3.

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::PROCHOT_Log

[Bit 16] PROCHOT Log When set, indicates that the PROCHOT Status bit has asserted since the log bit was last cleared. This log bit will remain set until cleared by software writing 0.

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::PROCHOT_Status

[Bit 0] PROCHOT Status (R0) When set, frequency is reduced due to assertion of external PROCHOT.

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::Reserved1

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::Reserved2

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::Reserved3

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::Reserved4

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::Reserved5

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::Reserved6

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::Reserved7

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::RunningAverageThermalLimitLog

[Bit 21] Running Average Thermal Limit Log When set, indicates that the RATL Status bit has asserted since the log bit was last cleared. This log bit will remain set until cleared by software writing 0.

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::RunningAverageThermalLimitStatus

[Bit 5] Running Average Thermal Limit Status (R0) When set, frequency is reduced due to running average thermal limit.

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::ThermalLog

[Bit 17] Thermal Log When set, indicates that the Thermal Status bit has asserted since the log bit was last cleared. This log bit will remain set until cleared by software writing 0.

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::ThermalStatus

[Bit 1] Thermal Status (R0) When set, frequency is reduced due to a thermal event.

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::Uint32

All bit fields as a 32-bit value

UINT64 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::Uint64

All bit fields as a 64-bit value

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::VRThermalDesignCurrentLog

[Bit 23] VR Thermal Design Current Log When set, indicates that the VR Therm Alert Status bit has asserted since the log bit was last cleared. This log bit will remain set until cleared by software writing 0.

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::VRThermalDesignCurrentStatus

[Bit 7] VR Thermal Design Current Status (R0) When set, frequency is reduced due to VR TDC limit.

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::VRThermAlertLog

[Bit 22] VR Therm Alert Log When set, indicates that the VR Therm Alert Status bit has asserted since the log bit was last cleared. This log bit will remain set until cleared by software writing 0.

UINT32 MSR_SKYLAKE_GRAPHICS_PERF_LIMIT_REASONS_REGISTER::VRThermAlertStatus

[Bit 6] VR Therm Alert Status (R0) When set, frequency is reduced due to a thermal alert from a processor Voltage Regulator.

Data Fields

Detailed Description

Field Documentation