Other Content

Summary Tables of Changes
Specification Update 21
ID
Processor Line / Stepping
Status Title
Y U H S X
H0 H0
3
H0 H0
3
J1
23e
Y0
42
B0 B0/
S0
B0
KBL038 X X X X X X X X X No Fix
Branch Instructions May Initialize MPX Bound
Registers Incorrectly
KBL039 X X X X X X X X X No Fix
Writing a Non-Canonical Value to an LBR MSR Does
Not Signal a #GP When Intel® PT is Enabled
KBL040 X X X X X X X X X No Fix
Processor May Run Intel® AVX Code Much Slower
Than Expected
KBL041 X X X X X X X X X No Fix
Intel® PT Buffer Overflow May Result in Incorrect
Packets
KBL042 X X X X X X X X X No Fix
Last Level Cache Performance Monitoring Events May
Be Inaccurate
KBL043 X X X X X X X X No Fix
#GP Occurs Rather Than #DB on Code Page Split
Inside an Intel® SGX Enclave
KBL044 X X X X X X X X X No Fix
Execution of VAESENCLAST Instruction May Produce a
#NM Exception Instead of a #UD Exception
KBL045 X X X X X X X X No Fix
Intel® SGX Enclave Accesses to the APIC-Access
Page May Cause APIC-Access VM Exits
KBL046 X X X X X X X X X No Fix
CR3 Filtering Does Not Compare Bits [11:5] of CR3
and IA32_RTIT_CR3_MATCH in PAE Paging Mode
KBL047 X X X X X X X X X No Fix x87 FDP Value May be Saved Incorrectly
KBL048 X X X X X X X X X No Fix PECI Frequency Limited to 1 MHz
KBL049 X X X X X X X X No Fix
Processor Graphics IOMMU Unit May Not Mask DMA
Remapping Faults
KBL050 X X X X X X X X X No Fix Intel® PT CYCThresh Value of 13 is Not Supported
KBL051 X X X X X X X X X No Fix
Enabling VMX-Preemption Timer Blocks HDC
Operation
KBL052 X X X X X X X X No Fix Integrated Audio Codec May Not be Detected
KBL053 X X X X X X X X No Fix
Display Flickering May be Observed with Specific eDP
Panels
KBL054 X X X X X X X X X No Fix
Incorrect Branch Predicted Bit in BTS/BTM Branch
Records
KBL055 X X X X X X X X X No Fix
MACHINE_CLEARS.MEMORY ORDERING Performance
Monitoring Event May Undercount
KBL056 X X X X X X X X X No Fix
Some Counters May Not Freeze On Performance
Monitoring Interrupts
KBL057 X X X X X X X X X No Fix
Instructions And Branches Retired Performance
Monitoring Events May Overcount
KBL058 X X X X X X X X X No Fix
Some OFFCORE_RESPONSE Performance Monitoring
Events May Overcount