[PATCH v4 1/2] KVM: arm64: Expose FEAT_LSFE to guests

[Oliver Upton]

On Thu, Sep 18, 2025 at 08:42:06PM +0100, Mark Brown wrote:
> FEAT_LSFE (Large System Float Extension), providing atomic floating point
> memory operations, is optional from v9.5. This feature adds no new
> architectural state, expose the relevant ID register field to guests so
> they can discover it.
> 
> Signed-off-by: Mark Brown <broonie at kernel.org>

We also need a test in set_id_regs.c selftest for the writability of
this new feature field.

Otherwise:

Reviewed-by: Oliver Upton <oliver.upton at linux.dev>

Thanks,
Oliver