Specification Update 11
Summary Tables of Changes
BG21 XXNo 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
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