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> Yes many are "just ARM" but due to custom extensions/chips and (in some cases) lack of standard ARM features that doesn't mean they are the same ARM. This is
by inkyoto 5y ago
> Yes many are "just ARM" but due to custom extensions/chips and (in some cases) lack of standard ARM features that doesn't mean they are the same ARM.
This is a stretch at best.
Linux running on M1, Graviton2 (and, soon, Graviton3), Raspberry Pi 3/4 runs same, aarch64 compiled, user space binaries. NetBSD running on M1 and on Raspeberry Pi 3/4 runs same, aarch64 compiled, user space binaries. ARM, the company, enforces the µ-architecture compatibility through the licensing. Just like Intel and AMD do.
The difference is perceptable at the hardware/kernel level; however the same is also true for nearly every new generation of Intel and AMD CPU's – at least some modifications are required in the kernel.
- imtringued 5y agoYou are conflating software compatibility with hardware availability. Most ARM vendors sell the equvialent of an electric bicycle when what you need is a van and there are only two viable manufacturers of vans but the first one doesn't sell to companies and the second one requires you rent the van.