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35-252 Vol. 3C

MODEL-SPECIFIC REGISTERS (MSRS)

48

Platform Clamping Limitation #2. 
When set, allows the processor to go below the OS requested P 

states in order to maintain the power below specified Platform 

Power Limit #2 value. 

62:49

Reserved

63

Lock. Setting this bit will lock all other bits of this MSR until system 

RESET.

690H

1680

MSR_

LASTBRANCH_16_FROM_IP

Thread

Last Branch Record 16 From IP (R/W)
One of 32 triplets of last branch record registers on the last branch 

record stack. This part of the stack contains pointers to the source 

instruction. See also:
• Last Branch Record Stack TOS at 1C9H

• Section  17.10

691H

1681

MSR_

LASTBRANCH_17_FROM_IP

Thread

Last Branch Record 17 From IP (R/W)
See description of MSR_LASTBRANCH_0_FROM_IP.

692H

1682

MSR_

LASTBRANCH_18_FROM_IP

Thread

Last Branch Record 18 From IP (R/W)
See description of MSR_LASTBRANCH_0_FROM_IP. 

693H

1683

MSR_

LASTBRANCH_19_FROM_IP

Thread

Last Branch Record 19From IP (R/W)
See description of MSR_LASTBRANCH_0_FROM_IP.

694H

1684

MSR_

LASTBRANCH_20_FROM_IP

Thread

Last Branch Record 20 From IP (R/W)
See description of MSR_LASTBRANCH_0_FROM_IP.

695H

1685

MSR_

LASTBRANCH_21_FROM_IP

Thread

Last Branch Record 21 From IP (R/W)
See description of MSR_LASTBRANCH_0_FROM_IP.

696H

1686

MSR_

LASTBRANCH_22_FROM_IP

Thread

Last Branch Record 22 From IP (R/W)
See description of MSR_LASTBRANCH_0_FROM_IP.

697H

1687

MSR_

LASTBRANCH_23_FROM_IP

Thread

Last Branch Record 23 From IP (R/W)
See description of MSR_LASTBRANCH_0_FROM_IP.

698H

1688

MSR_

LASTBRANCH_24_FROM_IP

Thread

Last Branch Record 24 From IP (R/W)
See description of MSR_LASTBRANCH_0_FROM_IP.

699H

1689

MSR_

LASTBRANCH_25_FROM_IP

Thread

Last Branch Record 25 From IP (R/W)
See description of MSR_LASTBRANCH_0_FROM_IP.

69AH

1690

MSR_

LASTBRANCH_26_FROM_IP

Thread

Last Branch Record 26 From IP (R/W)
See description of MSR_LASTBRANCH_0_FROM_IP.

69BH

1691

MSR_

LASTBRANCH_27_FROM_IP

Thread

Last Branch Record 27 From IP (R/W)
See description of MSR_LASTBRANCH_0_FROM_IP.

69CH

1692

MSR_

LASTBRANCH_28_FROM_IP

Thread

Last Branch Record 28 From IP (R/W)
See description of MSR_LASTBRANCH_0_FROM_IP.

69DH

1693

MSR_

LASTBRANCH_29_FROM_IP

Thread

Last Branch Record 29 From IP (R/W)
See description of MSR_LASTBRANCH_0_FROM_IP.

Table 35-37.  Additional MSRs Supported by 6th Generation Intel® Core™ Processors Based on Skylake 

Microarchitecture

Register 

Address

Register Name

Scope

Bit Description

 Hex

Dec