Enabling secure state-clean during configuration of partial reconfiguration bitstreams on FPGA

A method comprising:

• performing, as part of a partial reconfiguration (PR) configuration sequence for a new PR persona corresponding to a PR bitstream, a first clear operation to clear previously-set persona configuration bits in a region;
• performing, as part of the PR configuration sequence subsequent to the first clear operation, a set operation to set new persona configuration bits in the region;
• and
• performing, as part of the PR configuration sequence, a second clear operation to clear memory blocks of the region that became unfrozen subsequent to the set operation,
• wherein the first clear operation is persona independent while the set operation and the second clear operation are persona dependent.

A non-transitory machine-readable storage medium comprising instructions that, when executed, cause at least one processor to at least:

• perform, as part of a partial reconfiguration (PR) configuration sequence for a new PR persona corresponding to a PR bitstream, a first clear operation to clear previously-set persona configuration bits in a region;
• perform, as part of the PR configuration sequence subsequent to the first clear operation, a set operation to set new persona configuration bits in the region;
• and
• perform, as part of the PR configuration sequence, a second clear operation to clear memory blocks of the region that became unfrozen subsequent to the set operation,
• wherein the first clear operation is persona independent while the set operation and the second clear operation are persona dependent.