supporting Arm Neoverse V2 CPUs: NVIDIA Grace, AWS Graviton 4, Google Axion

[boegel]

While looking into implementing support in archdetect for detecting the Neoverse V2-based Graviton 4, I noticed that the CPUs that implement this microarchitecture only partially overlap (based on https://gpages.juszkiewicz.com.pl/arm-socs-table/arm-socs.html):

instructions	Amazon Graviton 4	NVIDIA Grace	Google Axion
sve2	x	x	x
paca	x		x
pacg	x		x
rng	x		x
sm3		x	x
sm4		x	x
svesm4		x	x
ssbs	x	x

Google Axion not supported ssbs is particularly interesting, since that meanw that our aarch64/neoverse_v1 installations may not even work there...

[ocaisa]

I was wondering if we inspect what instructions our binaries actually require?

[ocaisa]

Seems to be possible: https://github.com/pkgw/elfx86exts (says it works for x86 and ARM)

[ocaisa]

We could inspect the instructions required by the software, and have CI complain if it goes outside the common options.

[boegel]

Seems to be possible: https://github.com/pkgw/elfx86exts (says it works for x86 and ARM)

Step 0:

• {bio}[GCC/12.3.0] elfx86exts v0.6.2 easybuilders/easybuild-easyconfigs#22145