On Tue, Sep 21, 2021 at 11:39:26PM +0200, Emmanuel Gil Peyrot wrote: > This engine implements AES in CBC mode, using 128-bit keys only. It is > present on both the Wii and the Wii U, and is apparently identical in > both consoles. > > The hardware is capable of firing an interrupt when the operation is > done, but this driver currently uses a busy loop, I’m not too sure > whether it would be preferable to switch, nor how to achieve that. > > It also supports a mode where no operation is done, and thus could be > used as a DMA copy engine, but I don’t know how to expose that to the > kernel or whether it would even be useful. > > In my testing, on a Wii U, this driver reaches 80.7 MiB/s, while the > aes-generic driver only reaches 30.9 MiB/s, so it is a quite welcome > speedup. > > This driver was written based on reversed documentation, see: > https://wiibrew.org/wiki/Hardware/AES > > Emmanuel Gil Peyrot (4): > crypto: nintendo-aes - add a new AES driver > dt-bindings: nintendo-aes: Document the Wii and Wii U AES support > powerpc: wii.dts: Expose the AES engine on this platform > powerpc: wii_defconfig: Enable AES by default Does this pass the self-tests, including the fuzz tests which are enabled by CONFIG_CRYPTO_MANAGER_EXTRA_TESTS=y? - Eric
