Re: [PATCH v2 1/5] ACPI: CPPC: Check _OSC for flexible address space

[Pierre Gondois]

On 5/18/22 11:42, Viresh Kumar wrote:
> On 18-05-22, 11:08, Pierre Gondois wrote:
> > ACPI 6.2 Section 6.2.11.2 'Platform-Wide OSPM Capabilities':
> >    Starting with ACPI Specification 6.2, all _CPC registers can be in
> >    PCC, System Memory, System IO, or Functional Fixed Hardware address
> >    spaces. OSPM support for this more flexible register space scheme is
> >    indicated by the “Flexible Address Space for CPPC Registers” _OSC bit
> >
> > Otherwise (cf ACPI 6.1, s8.4.7.1.1.X), _CPC registers must be in:
> > - PCC or Functional Fixed Hardware address space if defined
> > - SystemMemory address space (NULL register) if not defined
> >
> > Add the corresponding _OSC bit and check it when parsing _CPC objects.
> >
> > Signed-off-by: Pierre Gondois <pierre.gondois@xxxxxxx>
> > Reviewed-by: Sudeep Holla <sudeep.holla@xxxxxxx>
> > ---
> >   drivers/acpi/bus.c       | 18 ++++++++++++++++++
> >   drivers/acpi/cppc_acpi.c |  9 +++++++++
> >   include/linux/acpi.h     |  2 ++
> >   3 files changed, 29 insertions(+)
>
> It would be much useful to get a cover letter for this series with
> what you have changed since the previous version. It is almost
> impossible to find that out otherwise.

Yes indeed, sorry for that, the changelog is:
v2:
[1/5] ACPI: CPPC: Check _OSC for flexible address space
- Renamed OSC_SB_CPC_FLEXIBLE_ADR_SP to OSC_SB_CPC_FLEXIBLE_ADR_SPACE
[3/5] ACPI: CPPC: Assume no transition latency if no PCCT
and
[4/5] cpufreq: CPPC: Enable fast_switch
- Renamed CPC_IN_SIO to CPC_IN_SYSTEM_IO
- Renamed CPC_IN_SM to CPC_IN_SYSTEM_MEMORY

or do you prefer to have the serie re-submitted ?

Regards,
Pierre