Vol. 3C 35-229

MODEL-SPECIFIC REGISTERS (MSRS)

17DH

390

MSR_SMM_MCA_CAP

THREAD

Enhanced SMM Capabilities (SMM-RO)
Reports SMM capability Enhancement. Accessible only while in 

SMM.

57:0

Reserved

58

SMM_Code_Access_Chk (SMM-RO)
If set to 1 indicates that the SMM code access restriction is 

supported and a host-space interface available to SMM handler.

59

Long_Flow_Indication (SMM-RO)
If set to 1 indicates that the SMM long flow indicator is supported 

and a host-space interface available to SMM handler.

63:60

Reserved

19CH

412

IA32_THERM_STATUS

Core

Thermal Monitor Status (R/W) 
See Table 35-2.

0

Thermal status (RO) 
See Table 35-2.

1

Thermal status log (R/WC0) 
See Table 35-2.

2

PROTCHOT # or FORCEPR# status (RO) 
See Table 35-2.

3

PROTCHOT # or FORCEPR# log (R/WC0) 
See Table 35-2.

4

Critical Temperature status (RO) 
See Table 35-2.

5

Critical Temperature status log (R/WC0) 
See Table 35-2.

6

Thermal threshold #1 status (RO) 
See Table 35-2.

7

Thermal threshold #1 log (R/WC0) 
See Table 35-2.

8

Thermal threshold #2 status (RO) 
See Table 35-2.

9

Thermal threshold #2 log (R/WC0) 
See Table 35-2.

10

Power Limitation status (RO) 
See Table 35-2.

11

Power Limitation log (R/WC0) 
See Table 35-2.

12

Current Limit status (RO) 
See Table 35-2.

Table 35-34.  Additional MSRs Common to Intel® Xeon® Processor D and Intel Xeon Processors E5 v4 Family Based 

on the Broadwell Microarchitecture

Register 

Address

Register Name

Scope

Bit Description

 Hex

Dec