Re: [PATCH] Enable ACPI_ADR_SPACE_PCI_CONFIG in acpi_gbl_default_address_spaces only when ACPI_PCI_CONFIGURED is defined

[Weidong Cui <weidongcui@gmail.com>]

Hi Bob and Erik,

> Hi Bob,
>
> Thank you very much for your new suggestion!  Let me make sure I understand it.
>
> 1. We should move the following define from aclinux.h to acconfig.h.
>
> #ifdef CONFIG_PCI
> #define ACPI_PCI_CONFIGURED
> #endif
>
> 2. We should add a comment there to "document why and when it should
> be removed".
> I don't really know "why and when" since I'm not an expert on ACPI (we
> were just trying
> to fix a bug :-)).
>
> Thanks!
> Weidong

Hi Bob and Erik,

I would like to ping you about my two questions above.  Can you please
advise on how I should proceed?

Thanks!
Weidong

>
> > -----Original Message-----
> > From: Moore, Robert <robert.moore@intel.com>
> > Sent: Thursday, March 04, 2021 9:37 AM
> > To: weidongcui@gmail.com
> > Cc: Kaneda, Erik <erik.kaneda@intel.com>; Wysocki, Rafael J <rafael.j.wysocki@intel.com>; Xinyang Ge <aegiryy@gmail.com>; linux-acpi@vger.kernel.org; devel@acpica.org; linux-kernel@vger.kernel.org
> > Subject: [Devel] Re: [PATCH] Enable ACPI_ADR_SPACE_PCI_CONFIG in acpi_gbl_default_address_spaces only when ACPI_PCI_CONFIGURED is defined
> >
> >
> >
> > -----Original Message-----
> > From: Weidong Cui <weidongcui@gmail.com>
> > Sent: Thursday, March 04, 2021 9:06 AM
> > To: Moore, Robert <robert.moore@intel.com>
> > Cc: Kaneda, Erik <erik.kaneda@intel.com>; Wysocki, Rafael J <rafael.j.wysocki@intel.com>; Xinyang Ge <aegiryy@gmail.com>; linux-acpi@vger.kernel.org; devel@acpica.org; linux-kernel@vger.kernel.org; Len Brown <lenb@kernel.org>
> > Subject: Re: [PATCH] Enable ACPI_ADR_SPACE_PCI_CONFIG in acpi_gbl_default_address_spaces only when ACPI_PCI_CONFIGURED is defined
> >
> > > Well, I don't like the fact that PCI_CONFIGURED would have to be defined by each current host:
> > >
> > > > +#ifdef ACPI_PCI_CONFIGURED
> > >
> > > I would rather the logic be reversed:
> > >
> > > > +#ifdef ACPI_PCI_NOT_CONFIGURED
> >
> > Thank you for the comments, Erik and Bob!
> >
> > ACPI_PCI_CONFIGURED is defined in aclinux.h (see below) and used in several places in evhandler.c and exregion.c.
> > I'm not sure why we want to introduce ACPI_PCI_NOT_CONFIGURED.  Bob, I don't understand your concerns about "have to be defined by each current host".  Can you please shed some light on it?
> >
> > It is required in aclinux.h, and thus it is required in every host-dependent configuration file (acfreebsd.h, acmacosx.h, acnetbsd.h, achaiku.h, etc.) I would rather not force these host-specific header files to change.
> > Bob
> >
> >
> > #ifdef CONFIG_PCI
> > #define ACPI_PCI_CONFIGURED
> > #endif
> >
> > > -----Original Message-----
> > > From: Kaneda, Erik <erik.kaneda@intel.com>
> > > Sent: Wednesday, March 03, 2021 10:29 AM
> > > To: Weidong Cui <weidongcui@gmail.com>; Moore, Robert
> > > <robert.moore@intel.com>; Wysocki, Rafael J
> > > <rafael.j.wysocki@intel.com>
> > > Cc: Xinyang Ge <aegiryy@gmail.com>; linux-acpi@vger.kernel.org;
> > > devel@acpica.org; linux-kernel@vger.kernel.org; Len Brown
> > > <lenb@kernel.org>
> > > Subject: RE: [PATCH] Enable ACPI_ADR_SPACE_PCI_CONFIG in
> > > acpi_gbl_default_address_spaces only when ACPI_PCI_CONFIGURED is
> > > defined
> > >
> > > This looks good to me. Bob, do you have any comments?
> > >
> > > Erik
> > >
> > > > -----Original Message-----
> > > > From: Weidong Cui <weidongcui@gmail.com>
> > > > Sent: Monday, February 8, 2021 7:18 PM
> > > > To: Moore, Robert <robert.moore@intel.com>; Kaneda, Erik
> > > > <erik.kaneda@intel.com>; Wysocki, Rafael J
> > > > <rafael.j.wysocki@intel.com>; Len Brown <lenb@kernel.org>
> > > > Cc: Weidong Cui <weidongcui@gmail.com>; Xinyang Ge
> > > > <aegiryy@gmail.com>; linux-acpi@vger.kernel.org; devel@acpica.org;
> > > > linux- kernel@vger.kernel.org
> > > > Subject: [PATCH] Enable ACPI_ADR_SPACE_PCI_CONFIG in
> > > > acpi_gbl_default_address_spaces only when ACPI_PCI_CONFIGURED is
> > > > defined
> > > >
> > > > Signed-off-by: Weidong Cui <weidongcui@gmail.com>
> > > > Signed-off-by: Xinyang Ge <aegiryy@gmail.com>
> > > > ---
> > > >  drivers/acpi/acpica/evhandler.c | 2 ++
> > > >  include/acpi/acconfig.h         | 4 ++++
> > > >  2 files changed, 6 insertions(+)
> > > >
> > > > diff --git a/drivers/acpi/acpica/evhandler.c
> > > > b/drivers/acpi/acpica/evhandler.c index 5884eba04..4c25ad433 100644
> > > > --- a/drivers/acpi/acpica/evhandler.c
> > > > +++ b/drivers/acpi/acpica/evhandler.c
> > > > @@ -26,7 +26,9 @@ acpi_ev_install_handler(acpi_handle obj_handle,
> > > >  u8 acpi_gbl_default_address_spaces[ACPI_NUM_DEFAULT_SPACES] = {
> > > >       ACPI_ADR_SPACE_SYSTEM_MEMORY,
> > > >       ACPI_ADR_SPACE_SYSTEM_IO,
> > > > +#ifdef ACPI_PCI_CONFIGURED
> > > >       ACPI_ADR_SPACE_PCI_CONFIG,
> > > > +#endif
> > > >       ACPI_ADR_SPACE_DATA_TABLE
> > > >  };
> > > >
> > > > diff --git a/include/acpi/acconfig.h b/include/acpi/acconfig.h index
> > > > a225eff49..790999028 100644
> > > > --- a/include/acpi/acconfig.h
> > > > +++ b/include/acpi/acconfig.h
> > > > @@ -162,7 +162,11 @@
> > > >  /* Maximum space_ids for Operation Regions */
> > > >
> > > >  #define ACPI_MAX_ADDRESS_SPACE          255
> > > > +#ifdef ACPI_PCI_CONFIGURED
> > > >  #define ACPI_NUM_DEFAULT_SPACES         4
> > > > +#else
> > > > +#define ACPI_NUM_DEFAULT_SPACES         3
> > > > +#endif
> > > >
> > > >  /* Array sizes.  Used for range checking also */
> > > >
> > > > --
> > > > 2.24.3 (Apple Git-128)
> > >
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