Method and apparatus for protecting TLB's VPN from soft errors

An apparatus comprising:

• a translation buffer to hold a translation buffer (TB) entry, wherein the TB entry is to include a stored virtual address, a stored parity value, and a stored page size value;
• content addressable memory (CAM) logic coupled to the translation buffer to perform a CAM operation to identify the TB entry in response to an incoming virtual address matching the stored virtual address;
• parity generation logic coupled to the translation buffer to generate a plurality of pre-computed parity values based on the incoming virtual address for a plurality of page sizes in parallel with the CAM logic performing the CAM operation to identify the TB entry;
• selection logic coupled to the parity generation logic to select a selected pre-computed parity value of the plurality of pre-computed parity values based on the stored page size value in the TB entry;
• parity error logic coupled to the translation buffer and the selection logic to determine if the TB entry is associated with a parity error based on the selected pre-computed parity value and the stored parity value.

A system comprising:

• a first processor, comprising:
• a translation buffer (TB) to receive an incoming virtual address, the TB to generate a plurality of pre-computed parity values for a plurality of corresponding possible page sizes based on the incoming virtual address in parallel to performing a lookup operation to identify a translation buffer entry (TBE) associated with the incoming virtual address, wherein the TB includes regeneration logic to generate a new parity value from a payload held in the TBE and parity logic coupled to the regeneration logic to determine if the TBE includes a parity error based on at least a selected pre-computed parity value of the plurality of pre-computed parity values and the new parity value, wherein the selected pre-computed parity value is to be selected based on a page size held in the TBE;
• and
• an interface to be coupled to an input/output device.