On Mon, Jun 05, 2023 at 11:07:08AM +0000, Andy Chiu wrote: > Vector unit is disabled by default for all user processes. Thus, a > process will take a trap (illegal instruction) into kernel at the first > time when it uses Vector. Only after then, the kernel allocates V > context and starts take care of the context for that user process. > > Suggested-by: Richard Henderson <richard.henderson@xxxxxxxxxx> > Link: https://lore.kernel.org/r/3923eeee-e4dc-0911-40bf-84c34aee962d@xxxxxxxxxx > Signed-off-by: Andy Chiu <andy.chiu@xxxxxxxxxx> > --- > Changelog v21: > - Remove has_vector() and use ELF_HWCAP instead. The V bit in the hwcap, > if preesents, implies has_vector() returning true. So we can drop > has_vector() test here safely, because we also don't handle !V but > has_vector() cases. I think you could probably have carried my R-b from v20, but I realise I did not reply to you - sorry about that. The removal of the has_vector() check seems to tally with the conversation we had on v20, so Reviewed-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx> Cheers, Conor.
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