writes "A few Sony patches to the Linux kernel have just been merged in the mainline tree, to be included in the 2.6.20 release. The patches add 'core platform support for the PS3 game console and other devices using the PS3 hypervisor.'"
From the Linux Devices article: "Linux gained generic support for the Cell processor, on which the PS3 is based, with the 2.6.13 release in June of 2005. The new Sony-contributed patches to the 2.6.20 kernel appear to add machine-specific support for technology such as the PS3's memory architecture, DMA (direct memory access) model, and SMP (symmetric multiprocessing) model. A Yellow Dog Linux (YDL) distribution has been available for the PS3 since October, thanks to a development deal between Sony and YDL publisher TerraSoft. However, YDL so far has not been bundled with early PS3 shipments, despite earlier indications from Sony Entertainment's CEO, Ken Kuturagi."