Re: [PATCH 0/4] platform/x86: wmi: Prepare for future changes

[Armin Wolf]

Am 04.11.25 um 21:52 schrieb Mario Limonciello:

> On 11/4/25 2:45 PM, Armin Wolf wrote:
> > After over a year of reverse engineering, i am finally ready to
> > introduce support for WMI-ACPI marshalling inside the WMI driver core.
> marshaling> Since the resulting patch series is quite large, i am 
> planning to
> > submit the necessary patches as three separate patch series.
> >
> > This is supposed to be the first of the three patch series. Its main
> > purpose is to prepare the WMI driver core for the upcoming changes.
> > The first patch fixes an issue inside the nls utf16 to utf8 conversion
> > code, while the next two patches fix some minor issues inside the WMI
> > driver core itself. The last patch finally moves the code of the WMI
> > driver core into a separate repository to allow for future additions
> > without cluttering the main directory.
>
> One question I have here on the patch to move things.
>
> Since Windows on ARM (WoA) laptops are a thing - is this still 
> actually x86 specific?  I am wondering if this should be moving to a 
> different subsystem altogether like ACPI; especially now with this 
> impending other large patch series you have on your way.

I know of a few WoA laptops that contain ACPI-WMI devices, meaning this driver is indeed not x86-specific.
However i need to make some changes to the WMI driver core (and actually tests it on a AArch64 VM) first
before moving it out of drivers/platform/x86.

Once i am actually ready for this i would prefer to move the whole stuff to drivers/platform, as drivers/acpi
IMHO is better suited for core ACPI drivers.

Thanks,
Armin Wolf

> > Armin Wolf (4):
> >    fs/nls: Fix utf16 to utf8 conversion
> >    platform/x86: wmi: Use correct type when populating ACPI objects
> >    platform/x86: wmi: Remove extern keyword from prototypes
> >    platform/x86: wmi: Move WMI core code into a separate directory
> >
> >   Documentation/driver-api/wmi.rst           |  2 +-
> >   MAINTAINERS                                |  2 +-
> >   drivers/platform/x86/Kconfig               | 30 +------------------
> >   drivers/platform/x86/Makefile              |  2 +-
> >   drivers/platform/x86/wmi/Kconfig           | 34 ++++++++++++++++++++++
> >   drivers/platform/x86/wmi/Makefile          |  8 +++++
> >   drivers/platform/x86/{wmi.c => wmi/core.c} | 34 +++++++++++++---------
> >   fs/nls/nls_base.c                          | 16 +++++++---
> >   include/linux/wmi.h                        | 15 ++++------
> >   9 files changed, 84 insertions(+), 59 deletions(-)
> >   create mode 100644 drivers/platform/x86/wmi/Kconfig
> >   create mode 100644 drivers/platform/x86/wmi/Makefile
> >   rename drivers/platform/x86/{wmi.c => wmi/core.c} (98%)
>
> Reviewed-by: Mario Limonciello (AMD) <superm1@xxxxxxxxxx>