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12 MSRC001_0140 OS Visible Work-around MSR0 (OSVW_ID_Length)

41322 Rev. 3.16 February 2008

Revision Guide for AMD Family 10h Processors

MSRC001_0140 OS Visible Work-around MSR0

(OSVW_ID_Length)

This register, as defined in AMD64 Architecture Programmer’s Manual Volume 2: System

Programming, order# 24593, is used to specify the number valid status bits within the OS Visible

Work-around status registers.

The default value of this register is 0000_0000_0000_0000h.

BIOS shall program the specified length as specified in Table 8 prior to hand-off to the OS.

Bits Description

63:16 Reserved.

15:0 OSVW_ID_Length: OS visible work-around ID length. Read-write

Table 8. OSVW_ID_Length Per Processor Revision

MSRC001_1040

Bits

Revision Number

DR-BA DR-B2

15:0 0001h 0001h

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 47 48

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