Intel
®
Xeon
®
Processor Specification Update
25
Summary Table of Changes
P68
X
No Fix
Modified cache line eviction from L2 cache may
result in write back of stale data
P69
X
X
X
X
X
X
X
No Fix
xAPIC may not report some illegal vector errors
P70
X
X
X
X
X
X
X
No Fix
Incorrect duty cycle is chosen when On-Demand
Clock Modulation is enabled in a processor
supporting Hyper-Threading Technology
P71
X
X
X
X
X
X
X
Plan Fix
Memory aliasing of pages as uncacheable memory
type and write back (WB) may hang the system
P72
X
X
X
Plan Fix
A timing marginality in the Instruction Decoder unit
may cause an unpredictable application behavior
and/or system hang
P73
X
X
X
X
X
X
X
No Fix
Missing Stop Grant Acknowledge special bus cycle
may cause a system hang
P74
X
X
X
X
X
X
X
No Fix
Machine check exceptions may not update
Last-Exception Record MSRs (LERs)
P75
X
X
X
X
X
X
X
No Fix
Stores to page tables may not be visible to page
walks for subsequent loads without serializing or
invalidating the page table entry
P76
X
X
X
Plan Fix
A timing marginality in the Arithmetic Logic Unit
(ALU) may cause indeterminate behavior
P77
X
X
X
X
X
X
X
No Fix
With Trap Flag (TF) asserted, FP instruction that
triggers an unmasked FP exception may take
single step trap before retirement of instruction
P78
X
X
X
X
X
X
X
No Fix
PDE/PTE loads and continuous locked updates to
the same cache line may cause a system livelock
P79
X
X
X
X
X
X
X
No Fix
Branch Trace Store (BTS) and Precise Event
Based Sampling (PEBS) may update memory
outside the BTS/PREBS buffer
P80
X
X
X
X
X
X
X
No Fix
Memory Ordering Failure may occur with Snoop
Filtering Third-Party Agents after Issuing and
completing a BWIL (Bus Write Invalidate Line) or
BLW (Bus Locked Write) transaction
P81
X
X
X
X
X
X
X
No Fix
Control Register 2 (CR2) can be updated during a
REP MOVS/STOS instruction with Fast Strings
enabled
P82
X
X
X
X
X
X
X
No Fix
Writing the Local Vector Table (LVT)
when an Interrupt is Pending May Cause an
Unexpected Interrupt
P83
X
X
X
X
X
X
X
No Fix
The Processor May Report a #TS Instead of a #GP
Fault
Errata (Sheet 4 of 4)
No.
C1/
0F0Ah
D0/
0F12h
B0/
0F24h
C1/
0F27h
D1/
0F29h
M0/
0F25h
L0/
0F29h
Plans
Errata