[PATCH] arm64: signal: Update sigcontext reservations table

[Mark Brown]

On Mon, Jul 29, 2024 at 03:41:49PM +0100, Dave Martin wrote:

> If Mark in particular can double-check the SME impact, that would be
> appreciated.

...

> Additional SME note: since userspace can freely switch in and out of
> streaming SVE mode and freely enable/disable ZA and ZT0, I'm assuming
> that none of sve_context, za_context and zt_context are mutually
> exclusive, but please shout if I have confused myself here.

There's no mutual exclusion here, but since we only generate the data
payloads if userspace explicitly chooses to enter streaming mode or
enable ZA/ZT0 I would tend to class any VL dependent size there as opt
in and only include the base structs.  I'm not clear what your thinking
is with specifying them for some vector lengths.
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