Re: [PATCH v4 5/9] arm64/sysreg: Update ID_AA64SMFR0_EL1 to DDI0601 2024-09

[Will Deacon <will@kernel.org>]

On Tue, Jan 07, 2025 at 03:26:34PM +0000, Mark Brown wrote:
> On Tue, Jan 07, 2025 at 03:13:24PM +0000, Will Deacon wrote:
> > On Wed, Dec 11, 2024 at 01:02:50AM +0000, Mark Brown wrote:
> 
> > > -Res0	27:0
> > > +UnsignedEnum	27	SF8MM8
> > > +	0b0	NI
> > > +	0b1	IMP
> > > +EndEnum
> > > +UnsignedEnum	26	SF8MM4
> > > +	0b0	NI
> > > +	0b1	IMP
> > > +EndEnum
> 
> > afaict, bits 27 and 26 are still RES0 in all the documentation I can
> > find...
> 
> They're in the 2024-09 XML release here:
> 
>    https://developer.arm.com/documentation/ddi0601/2024-09/AArch64-Registers/ID-AA64SMFR0-EL1--SME-Feature-ID-Register-0?lang=en
> 
> which was current at the time the series was sent but I see that they've
> been removed in the 2024-12 release which came out later, right at the
> end of last year:
> 
>    https://developer.arm.com/documentation/ddi0601/2024-12/AArch64-Registers/ID-AA64SMFR0-EL1--SME-Feature-ID-Register-0?lang=en
> 
> so we should just remove these.  I'll respin (or should I do it
> incrementally to save on re-review of the rest of it?).

Gimme a sec as I'm the process of applying the other sysregs bits (which
looked fine).

Will