On 10/11/14 13:25, Jan Kiszka wrote: > On 2014-11-10 14:08, Marc Zyngier wrote: >> On 10/11/14 12:51, Jan Kiszka wrote: >>> Hi Marc, >>> >>> what is the motivation to expose a PSCI 0.1 interface in U-boot, instead >>> of 0.2? Support for preexisting users of 0.1? The kernel seems to be >>> happy with both, and I'm now wondering if we should actually add the >>> legacy version to Jailhouse as well (I hope we can avoid this). >> >> The initial rational was simple: at the time this code was written, the >> 0.2 spec still in review, and nobody was implementing it. Supporting 0.1 >> was the only viable use-case. >> >>> Still studying the logic: Is it possible to provide both interfaces, and >>> would it make sense? >> >> Supporting both is very easy. Just output the 0.2 function numbers that >> actually make sense for 0.1 and have both compatible strings. > > Ah, cool - parameters and return values of, say, CPU_ON/OFF are > compatible across both versions?
That was the idea of the spec (broadly compatible across revisions...). Thanks, M. -- Jazz is not dead. It just smells funny... _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot