[GIT PULL] arm64 updates for 6.18

[Will Deacon]

On Sun, Sep 28, 2025 at 07:27:17PM +0800, Zenghui Yu wrote:
> On 2025/9/27 1:13, Will Deacon wrote:
> > ACPI, EFI and PSCI:
> >  - Decouple Arm's "Software Delegated Exception Interface" (SDEI)
> >    support from the ACPI GHES code so that it can be used by platforms
> >    booted with device-tree.
> > 
> >  - Remove unnecessary per-CPU tracking of the FPSIMD state across EFI
> >    runtime calls.
> > 
> >  - Fix a node refcount imbalance in the PSCI device-tree code.
> > 
> > CPU Features:
> >  - Ensure register sanitisation is applied to fields in ID_AA64MMFR4.
> > 
> >  - Expose AIDR_EL1 to userspace via sysfs, primarily so that KVM guests
> >    can reliably query the underlying CPU types from the VMM.
> > 
> >  - Re-enabling of SME support (CONFIG_ARM64_SME) as a result of fixes
> >    to our context-switching, signal handling and ptrace code.
> 
> IIRC they're 6.16 stuff [*].
> 
> [*] https://lore.kernel.org/all/20250528114103.GA27965@willie-the-truck

Well spotted! It's nice to see eagle-eyed review of the tag summary. In
this case, I forgot to drop a couple of sections from the previous tag I
wrote -- we use the same tag name each time ("arm64-upstream"), so it
gets pre-filled with the old contents when we update it and, since
Catalin and I take it in turns, that's why 6.16 showed up here.

The good news is that the actual pull request is fine and Linus has
already pulled it. I now wonder how many quality news sites will report
that arm64 is re-enabling SME in 6.18 ;)

Will