On Fri, Feb 25, 2022 at 04:58:49PM +0000, Mark Brown wrote: > +4. System call behaviour > +------------------------- > + > +* On syscall PSTATE.ZA is preserved, if PSTATE.ZA==1 then the contents of the > + ZA matrix are preserved. > + > +* On syscall PSTATE.SM will be cleared and the SVE registers will be handled > + as normal. > + > +* Neither the SVE registers nor ZA are used to pass arguments to or receive > + results from any syscall. > + > +* On creation fork() or clone() the newly created process will have PSTATE.SM > + and PSTATE.ZA cleared. Nitpick: I'd drop fork() from here as we don't implement the syscall on arm64 and maybe just use clone() as an example, something like: "On process creation (e.g. clone()), the newly created ...". Otherwise the ABI looks fine to me, though I'd like the Szabolcs and Luis to ack from the glibc/gdb side. Reviewed-by: Catalin Marinas <catalin.marinas@xxxxxxx>
