[PATCH v4 0/5] initialize SCTRL2_ELx

[Yeoreum Yun]

Hi Dave,

> On Thu, Aug 21, 2025 at 06:24:03PM +0100, Yeoreum Yun wrote:
> > This series introduces initial support for the SCTLR2_ELx registers in Linux.
> > The feature is optional starting from ARMv8.8/ARMv9.3,
> > and becomes mandatory from ARMv8.9/ARMv9.4.
> >
> > Currently, Linux has no strict need to modify SCTLR2_ELx--
> > at least assuming that firmware initializes
> > these registers to reasonable defaults.
> >
> > However, several upcoming architectural features will require configuring
> > control bits in these registers.
> > Notable examples include FEAT_PAuth_LR and FEAT_CPA2.
>
> This looks OK to me now, except for one or two minor issues (see
> replies to the patches).
>
> I think we will need a way of testing all the code paths before this
> should be merged, though.
>
> Have you tested all the code paths, or are there some things that have
> not been tested?

I've tested for pKVM, nested and nhve and crash path
(I do my best what can I do for modified path).

>
>
> Since this code is not useful by itself, it may make sense to delay
> merging it until we have patches for a feature that depends on SCTLR2.

Whatever I pass this detiermination for maintainer.

>
> Cheers
> ---Dave

--
Sincerely,
Yeoreum Yun