
Summary Tables of Changes
32 Specification Update
LBR, BTS, BTM May Report a Wrong Address when an
Exception/Interrupt Occurs in 64-bit Mode
A Thermal Interrupt Is Not Generated when the Current
Temperature Is Invalid
CMPSB, LODSB, or SCASB in 64-bit Mode with Count Greater or
Equal to 2
48
May Terminate Early
Returning to Real Mode from SMM with EFLAGS.VM Set May Result
in Unpredictable System Behavior
VMLAUNCH/VMRESUME May Not Fail When VMCS Is Programmed
to Cause VM Exit to Return to a Different Mode
IRET under Certain Conditions May Cause an Unexpected
Alignment Check Exception
Performance Monitoring Event FP_ASSIST May Not Be Accurate
CPL-Qualified BTS May Report Incorrect Branch-From Instruction
Address
PEBS Does Not Always Differentiate Between CPL-Qualified Events
PMI May Be Delayed to Next PEBS Event
PEBS Buffer Overflow Status Will Not Be Indicated Unless
IA32_DEBUGCTL[12] Is Set
The BS Flag in DR6 May Be Set for Non-Single-Step #DB Exception
An Asynchronous MCE during a Far Transfer May Corrupt ESP
In Single-Stepping on Branches Mode, the BS Bit in the Pending-
Debug-Exceptions Field of the Guest State Area will be Incorrectly
Set by VM Exit on a MOV to CR8 Instruction
B0-B3 Bits in DR6 May Not Be Properly Cleared after Code
Breakpoint
BTM/BTS Branch-From Instruction Address May Be Incorrect for
Software Interrupts
REP Store Instructions in a Specific Situation May Cause the
Processor to Hang
Performance Monitor SSE Retired Instructions May Return
Incorrect Values
Performance Monitoring Events for L1 and L2 Miss May Not Be
Accurate
Store to WT Memory Data May Be Seen in Wrong Order by Two
Subsequent Loads
A MOV Instruction from CR8 Register with 16 Bit Operand Size Will
Leave Bits 63:16 of the Destination Register Unmodified
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