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INSTRUCTION SET REFERENCE
INVLPGInvalidate TLB Entry
Description
This instruction invalidates (flushes) the translation lookaside buffer (TLB) entry specified with
the source operand. The source operand is a memory address. The processor determines the page
that contains that address and flushes the TLB entry for that page.
The INVLPG instruction is a privileged instruction. When the processor is running in protected
mode, the CPL of a program or procedure must be 0 to execute this instruction.
The INVLPG instruction normally flushes the TLB entry only for the specified page; however,
in some cases, it flushes the entire TLB. Refer to MOVMove to/from Control Registers in
this chapter for further information on operations that flush the TLB.
Intel Architecture Compatibility
The INVLPG instruction is implementation dependent, and its function may be implemented
differently on future Intel Architecture processors. This instruction is not supported on Intel
Architecture processors earlier than the Intel486 processor.
Operation
Flush(RelevantTLBEntries);
Continue (* Continue execution);
Flags Affected
None.
Protected Mode Exceptions
#GP(0)
If the current privilege level is not 0.
#UD
Operand is a register.
Real-Address Mode Exceptions
#UD
Operand is a register.
Virtual-8086 Mode Exceptions
#GP(0)
The INVLPG instruction cannot be executed at the virtual-8086 mode.
Opcode
Instruction
Description
0F 01/7
INVLPG m
Invalidate TLB Entry for page that contains m
