On 6 November 2013 14:21, Peter Maydell <peter.mayd...@linaro.org> wrote: > On 6 November 2013 13:05, Ard Biesheuvel <ard.biesheu...@linaro.org> wrote:
[...] >> Thanks, I was wondering about that. Should there be another check? Not >> all v8 cores will implement these extensions, so we might also want to >> emulate one that doesn't, I suppose? > > Yes, that would probably be better, actually: add a new ARM_FEATURE_ > bit and then make ARM_FEATURE_V8 imply that new bit in > arm_cpu_realizefn(). > On the v8 kernel side, there will be different hwcaps for AES, mull.p64, SHA2, SHA3 and CRC, according to http://marc.info/?l=linux-arm-kernel&m=138308148814679&w=2 and Steve Capper is currently extending the patch to include setting Aarch32 compat flags for each of those. For now, I will just add a flag called ARM_FEATURE_V8_AES, which gets set when V8 is enabled, and leave everything else (including emulating a v8 CPU in Aarch32 mode without AES extensions) to someone else. Cheers, Ard. _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
