[PATCH 01/25] arm64: sysreg: Add missing ID_AA64ISAR[13]_EL1 fields and variants

[Mark Brown]

On Mon, Jan 22, 2024 at 08:18:28PM +0000, Marc Zyngier wrote:

> Despite having the control bits for FEAT_SPECRES and FEAT_PACM,
> the ID registers fields are either incomplete or missing.

In general the registers tend to get updated register by register so
it's not 100% surprising to get partial definition of features, though
more usually it's the ID register that's there.

> Fix it.

Checking against DDI0601 2023-12 the additions here look correct with
the proviso below, I didn't audit for other missing defintions in the
two affected registers (ID_AA64ISAR[13]_EL1).

Reviewed-by: Mark Brown <broonie at kernel.org>

> ---
>  arch/arm64/tools/sysreg | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/tools/sysreg b/arch/arm64/tools/sysreg
> index fa3fe0856880..53daaaef46cb 100644
> --- a/arch/arm64/tools/sysreg
> +++ b/arch/arm64/tools/sysreg
> @@ -1366,6 +1366,7 @@ EndEnum
>  UnsignedEnum	43:40	SPECRES
>  	0b0000	NI
>  	0b0001	IMP
> +	0b0010	COSP_RCTX

This is OK in itself but there's also a copy of this in ID_ISAR6_EL1
which needs updating too (and presumably ought to be considered by the
hypervisor, I didn't look at anything else yet).
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