[PATCH v5 0/6] Cache coherency management subsystem

[Conor Dooley]

On Fri, Nov 14, 2025 at 12:49:58PM +0000, Jonathan Cameron wrote:
> On Sat, 8 Nov 2025 20:02:52 +0000
> Conor Dooley <conor at kernel.org> wrote:
> 
> > Arnd,
> > 
> > On Fri, Oct 31, 2025 at 11:17:03AM +0000, Jonathan Cameron wrote:
> > > Support system level interfaces for cache maintenance as found on some
> > > ARM64 systems. It is expected that systems using other CPU architectures
> > > (such as RiscV) that support CXL memory and allow for native OS flows
> > > will also use this. This is needed for correct functionality during
> > > various forms of memory hotplug (e.g. CXL). Typical hardware has MMIO
> > > interface found via ACPI DSDT. A system will often contain multiple
> > > hardware instances.
> > > 
> > > Includes parameter changes to cpu_cache_invalidate_memregion() but no
> > > functional changes for architectures that already support this call.
> > > 
> > > How to merge?
> > > - Current suggestion would be via Conor's drivers/cache tree which routes
> > >   through the SoC tree.  
> > 
> > I was gonna put this in linux-next, but I'm not really sure that Arnd
> > was satisfied with the discussion on the previous version about
> > suitability of the directory: https://lore.kernel.org/all/20251028114348.000006ed@huawei.com/
> > 
> > Arnd, did that response satisfy you, or nah?
> 
> Seems Arnd is busy.  Conor, if you are happy doing so, maybe push it to a tree
> linux-next picks up, but hold off on the pull request until Arnd has had a chance
> to reply?

Yeah, I did step one of that last night and will put it in linux-next
from Monday. Ultimately the PR goes to Arnd, so he can judge it there
anyway.
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