This commit addresses a crash that occurs when running crypto tasks on
IPQ807x devices explicitly utilizing the NSS cores. The crash was
reproducible in scenarios involving cryptographic operations offloaded
to the NSS cores (e.g., using cryptodev with OpenSSL or running the
crypto test module).
IMPORTANT: This fix should not be misunderstood as a general-purpose
performance boost for all cryptographic workloads. If your goal is to
accelerate AES encryption across the board (e.g., using OpenSSL for
routine file encryption), this approach is **not** practical.
The primary benefit of leveraging the NSS cores for cryptographic operations
is within VPN-oriented use cases, such as OpenVPN or IPsec, where the
offloading to NSS cores can reduce CPU load and improve throughput.
It’s critical to note that this fix will **not** accelerate encryption
for protocols like Wireguard. Wireguard’s design uses ChaCha20-Poly1305
rather than AES, and it cannot easily be offloaded to hardware.
Additionally, Wireguard uses short-lived cryptographic keys that rotate
frequently. This frequent key rotation makes it difficult to interface
with hardware offloading mechanisms, which are typically optimized for
long-lived sessions like those found in IPsec.
Signed-off-by: Sebastian Gottschall <s.gottschall@dd-wrt.com>
Signed-off-by: Sean Khan <datapronix@protonmail.com>
