[PATCH v2 0/4] arm64: Add AT_HWCAP3

[Mark Brown]

On Wed, Jul 06, 2022 at 11:08:55AM +0100, Marc Zyngier wrote:
> On 2022-07-05 18:53, Mark Brown wrote:

> > else said anything.  I don't have strong preferences either way but
> > wonder if it's worth defining AT_HWCAP3 even if we start allocating more
> > bits from AT_HWCAP2 so that it's got more time to percolate through
> > libcs and so on before it's actually needed.

> I really don't like the idea of adding a new HWCAP when we still
> have free bits lying around. We should use that first, and only
> add HWCAP3 once we are at (or close enough to) the limit.

It depends what you define as close of course - it's only taken us 4
years to fill the low 32 bits in AT_HWCAP2, that doesn't make it a
pressing issue in terms of kernel development but in terms of things
like entrprise distros it's starting to get into the timescales where it
might be relevant.
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