Specification Update
11
Summary Tables of Changes
BG21
X
X
No Fix
An Enabled Debug Breakpoint or Single Step Trap May Be
Taken after MOV SS/POP SS Instruction If It Is Followed by
an Instruction That Signals a Floating Point Exception
BG22
X
X
No Fix
IA32_MPERF Counter Stops Counting during On-Demand
TM1
BG23
X
X
No Fix
The Memory Controller tTHROT_OPREF Timings May Be
Violated during Self-Refresh Entry
BG24
X
X
No Fix
Synchronous Reset of IA32_APERF/IA32_MPERF Counters
on Overflow Does Not Work
BG25
X
X
No Fix
Disabling Thermal Monitor While Processor is Hot, Then Re-
enabling, May Result in Stuck Core Operating Ratio
BG26
X
X
No Fix
Writing the Local Vector Table (LVT) When an Interrupt is
Pending May Cause an Unexpected Interrupt
BG27
X
X
No Fix
xAPIC Timer May Decrement Too Quickly Following an
Automatic Reload While in Periodic Mode
BG28
X
X
No Fix
Changing the Memory Type for an In-Use Page Translation
May Lead to Memory-Ordering Violations
BG29
X
X
No Fix
Infinite Stream of Interrupts May Occur If an ExtINT
Delivery Mode Interrupt is Received While All Cores in Deep
Power Down Technology (code name C6 state)
BG30
X
X
No Fix
Two xAPIC Timer Event Interrupts May Unexpectedly Occur
BG31
X
X
No Fix
EOI Transaction May Not Be Sent If Software Enters Core
Deep Power Down Technology (code name C6 state) during
an Interrupt Service Routine
BG32
X
X
No Fix
FREEZE_WHILE_SMM Does Not Prevent Event from Pending
PEBS during SMM
BG33
X
X
No Fix
APIC Error “Received Illegal Vector” May Be Lost
BG34
X
X
No Fix
DR6 May Contain Incorrect Information When the First
Instruction after a MOV SS,r/m or POP SS Is a Store
BG35
X
X
No Fix
An Uncorrectable Error Logged in IA32_CR_MC2_STATUS
May Also Result in a System Hang
BG36
X
X
No Fix
IA32_PERF_GLOBAL_CTRL MSR May Be Incorrectly
Initialized
BG37
X
X
No Fix
Performance Monitor Counter INST_RETIRED.STORES May
Count Higher Than Expected
BG38
X
X
No Fix
Sleeping Cores May Not Be Woken Up on Logical Cluster
Mode Broadcast IPI Using Destination Field Instead of
Shorthand
BG39
X
X
No Fix
Faulting Executions of FXRSTOR May Update State
Inconsistently
BG40
X
X
No Fix
Performance Monitor Event EPT.EPDPE_MISS May Be
Counted While EPT Is Disable
BG41
X
X
No Fix
Memory Aliasing of Code Pages May Cause Unpredictable
System Behavior
Errata (Sheet 2 of 4)
Number
Steppings
Status
ERRATA
C-2
K-0
