Specifications

Intel
®
64 and IA-32 Architectures Software Developer’s Manual Documentation Changes 284
Documentation Changes
Table B-2. IA-32 Architectural MSRs
Register Address Architectural MSR Name
and bit fields
(Former MSR Name) MSR/Bit Description
Introduced as
Architectural
MSR
Hex Decimal
...
179H 377 IA32_MCG_CAP
(MCG_CAP)
Global Machine Check
Capability (RO)
06_01H
7:0 Count: Number of reporting
banks
8 MCG_CTL_P: IA32_MCG_CTL
is present if this bit is set
9 MCG_EXT_P: Extended
machine check state
registers are present if this
bit is set
10 MCP_CMCI_P: Support for
corrected MC error event is
present.
06_1AH
11 MCG_TES_P: Threshold-
based error status register
are present if this bit is set.
15:12 Reserved
23:16 MCG_EXT_CNT: Number of
extended machine check
state registers present.
24 MCG_SER_P: The processor
supports software error
recovery if this bit is set.
63:25 Reserved
...
1B0H 432 IA32_ENERGY_PERF_BIAS Performance Energy Bias
Hint (R/W)
if
CPUID.6H:ECX[3]
= 1
...
280H 640 IA32_MC0_CTL2 (R/W) 06_1AH
14:0 Corrected error count
threshold
29:15 Reserved
30 CMCI_EN
63:31 Reserved
...
414H 1044 IA32_MC5_CTL MC5_CTL 06_0FH
415H 1045 IA32_MC5_STATUS MC5_STATUS 06_0FH
416H 1046 IA32_MC5_ADDR
1
MC5_ADDR 06_0FH