[PATCH 1/3] ACPICA: Add support for FFH Opregion special context data

Sudeep Holla sudeep.holla at arm.com
Wed Jun 22 07:00:42 PDT 2022


On Wed, Jun 22, 2022 at 02:50:08PM +0200, Rafael J. Wysocki wrote:
> On Thu, Jun 16, 2022 at 11:01 AM Sudeep Holla <sudeep.holla at arm.com> wrote:
> >
> > FFH(Fixed Function Hardware) Opregion is approved to be added in ACPIC 6.5 via
> 
> s/ACPIC/ACPI/
>

Fixed and pushed in ACPICA PR.

> > code first approach[1]. It requires special context data similar to GPIO and
> > Generic Serial Bus as it needs to know platform specific offset and length.
> >
> > Add support for the special context data needed by FFH Opregion.
> >
> > FFH OpRegion enables advanced use of FFH on some architectures. For example,
> > it could be used to easily proxy AML code to architecture-specific behavior
> > (to ensure it is OS initiated)
> >
> > Actual behavior of FFH is ofcourse architecture specific and depends on
> > the FFH bindings. The offset and length could have arch specific meaning
> > or usage.
> >
> > [1] https://bugzilla.tianocore.org/show_bug.cgi?id=3598
> >
> > Signed-off-by: Sudeep Holla <sudeep.holla at arm.com>
> 
> This looks reasonable to me and I see that you've already submitted a
> pull request to the upstream ACPICA.

I assume you would prefer me to post the other 2 patches once this lands
in your -next. Worst case I would like to get the generic patch in along
with ACPICA changes, I can then route the arm64 specific next cycle if it
gets too late for v5.20

-- 
Regards,
Sudeep



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