[PATCH v1 1/1] riscv: Add RVV memset via multiarch/IFUNC

[Florian Weimer]

* Palmer Dabbelt:

> On Wed, 29 Oct 2025 19:01:22 PDT (-0700), bergner@tenstorrent.com wrote:
>> On 10/29/25 6:36 PM, Palmer Dabbelt wrote:
>>> You're talking glibc-hwcaps though, right?  Jeff is saying AT_HWCAP,
>>> which is busted on RISC-V (we allocated a bunch of bits early and then
>>> vendors did whatever they wanted, V got specifically tied up with the
>>> V-0.7.1 stuff).
>>
>> Yes, I was talking about glibc-hwcaps, not AT_HWCAP.
>
> Ya, so I think last time we talked about glibc-hwcaps the basic takeaway 
> was that we just didn't know what HW was going to look like, so adding a 
> glibc-hwcap would be premature.

I think it depends on how serious the ecosystem is about killing off
the base ISA (at least in the glibc context).  If we don't expect
distributions to switch to RVA23 in the next year or two, maybe adding
an RVA23 subdirectory still makes sense.  Of course, if RVA23 gets
adopted by distributions faster than glibc 2.43, that's unnecessary.