Intel
®
Xeon
®
Processor Specification Update
23
Summary Table of Changes
P26
X
X
X
X
X
X
X
No Fix
The processor signals page-fault exception (#pf)
instead of alignment check exception (#ac) on an
unlocked cmpxchg8b instruction
P27
X
X
X
Fixed
Incorrect data may be returned when page tables
are located in write combining (WC) memory
P28
X
X
X
X
X
X
X
No Fix
FSW may not be completely restored after
page-fault on FRSTOR or FLDENV instructions
P29
X
X
X
Fixed
Write combining (WC) load may result in an
unintended address on system bus
P30
X
X
X
X
X
X
X
No Fix
Processor provides a 4-byte store unlock after an
8-byte load lock
P31
X
X
X
Fixed
Multiple accesses to the same S-state L2 cache
line and ECC error combination may result in loss
of cache coherency
P32
X
X
X
X
X
X
X
No Fix
IA32_MC0_ADDR and IA32_MC0_MISC registers
will contain invalid or stale data following a data,
address, or response parity error
P33
X
X
X
X
X
X
X
No Fix
When the processor is in the system management
mode (SMM), debug registers may be fully
writeable
P34
X
X
X
X
X
X
X
No Fix
Associated counting logic must be configured
when using event selection control (ESCR) MSR
P35
X
X
X
Fixed
Livelock may occur when bus parking is disabled
P36
X
X
X
Fixed
CR2 May be incorrect or an incorrect page-fault
error code may be pushed on to stack after
execution of an LSS instruction
P37
X
X
Fixed
Buffer on resistance may exceed specification
P38
X
Fixed
Instruction pointer stored on stack may become
invalid
P39
X
X
X
X
X
No Fix
Shutdown and IERR# may result due to a machine
check exception on a Hyper-threading Technology
enabled processor
P40
X
Fixed
Hyper-Threading Technology enabled processors
may hang in the presence of extensive
self-modifying code
P41
X
Fixed
Global bit incorrectly set for secondary logical
processors in ITLB
P42
X
Fixed
Machine check exception (MCE) observed on DP
platforms
P43
X
X
X
X
X
Plan Fix
BPM[5:3]# VIL does not meet specification
P44
X
X
X
X
X
No Fix
Processor may hang under certain frequencies and
12.5% STPCLK# duty cycle
P45
X
X
X
X
X
X
X
No Fix
System may hang if a fatal cache error causes bus
write line (BWL) transaction to occur to the same
cache line address as an outstanding bus read line
(BRL) or bus read-invalidate line (BRIL)
P46
X
X
X
Fixed
L2 cache may contain stale data in the exclusive
state
Errata (Sheet 2 of 4)
No.
C1/
0F0Ah
D0/
0F12h
B0/
0F24h
C1/
0F27h
D1/
0F29h
M0/
0F25h
L0/
0F29h
Plans
Errata