Re: [PATCH AUTOSEL 5.18 063/159] arm64/sme: Add ID_AA64SMFR0_EL1 to __read_sysreg_by_encoding()

[Sasha Levin]

On Mon, May 30, 2022 at 04:17:19PM +0200, Mark Brown wrote:
> On Mon, May 30, 2022 at 09:22:48AM -0400, Sasha Levin wrote:
> > From: Mark Brown <broonie@xxxxxxxxxx>
> >
> > [ Upstream commit 8a58bcd00e2e8d46afce468adc09fcd7968f514c ]
> >
> > We need to explicitly enumerate all the ID registers which we rely on
> > for CPU capabilities in __read_sysreg_by_encoding(), ID_AA64SMFR0_EL1 was
> > missed from this list so we trip a BUG() in paths which rely on that
> > function such as CPU hotplug. Add the register.
>
> > +	read_sysreg_case(SYS_ID_AA64SMFR0_EL1);
>
> This won't build on v5.18 since it does not contain SME support
> and therefore lacks the definition for the SME feature register.

Dropped, thanks!

--
Thanks,
Sasha