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From: "Winiarska, Iwona" <iwona.winiarska@intel.com>
To: "Hansen, Dave" <dave.hansen@intel.com>, "bp@alien8.de" <bp@alien8.de>
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	"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
	"Williams, Dan J" <dan.j.williams@intel.com>,
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Subject: Re: [PATCH v2 01/15] x86/cpu: Move intel-family to arch-independent headers
Date: Mon, 11 Oct 2021 20:53:51 +0000	[thread overview]
Message-ID: <43e367e452c6c8d9c6a275299d7ff6f2bb26b8e3.camel@intel.com> (raw)
In-Reply-To: <67f2cfda-c78b-6282-f5a3-2f345f8e2849@intel.com>

On Mon, 2021-10-11 at 12:40 -0700, Dave Hansen wrote:
> On 10/11/21 12:21 PM, Winiarska, Iwona wrote:
> > On Mon, 2021-10-04 at 21:03 +0200, Borislav Petkov wrote:
> > > On Tue, Aug 03, 2021 at 01:31:20PM +0200, Iwona Winiarska wrote:
> > > > Baseboard management controllers (BMC) often run Linux but are usually
> > > > implemented with non-X86 processors. They can use PECI to access package
> > > > config space (PCS) registers on the host CPU and since some information,
> > > > e.g. figuring out the core count, can be obtained using different
> > > > registers on different CPU generations, they need to decode the family
> > > > and model.
> > > > 
> > > > Move the data from arch/x86/include/asm/intel-family.h into a new file
> > > > include/linux/x86/intel-family.h so that it can be used by other
> > > > architectures.
> > > > 
> > > > Signed-off-by: Iwona Winiarska <iwona.winiarska@intel.com>
> > > > Reviewed-by: Tony Luck <tony.luck@intel.com>
> > > > Reviewed-by: Dan Williams <dan.j.williams@intel.com>
> > > > ---
> > > > To limit tree-wide changes and help people that were expecting
> > > > intel-family defines in arch/x86 to find it more easily without going
> > > > through git history, we're not removing the original header
> > > > completely, we're keeping it as a "stub" that includes the new one.
> > > > If there is a consensus that the tree-wide option is better,
> > > > we can choose this approach.
> > > Why can't the linux/ namespace header include the x86 one so that
> > > nothing changes for arch/x86/?
> > Same reason why PECI can't just include arch/x86 directly (we're building
> > for
> > ARM, not x86).
> If you're in include/linux/x86-hacks.h, what prevents you from doing
> 
> #include "../../arch/x86/include/asm/intel-family.h"
> 
> ?
> 
> In the end, to the compiler, it's just a file in a weird location in the
> tree.  I think I'd prefer one weird include to moving that file out of
> arch/x86.

Using relative includes in include/linux is uncommon (I can see just one usage
in libfdt.h pulling stuff from scripts), so I thought I can't use it in this way
(seems slightly hacky to pull stuff from outside include path).

But if that would be ok, it looks like a good alternative to avoid duplication
in this case.

Thanks
-Iwona

  reply	other threads:[~2021-10-11 21:32 UTC|newest]

Thread overview: 49+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-03 11:31 [PATCH v2 00/15] Introduce PECI subsystem Iwona Winiarska
2021-08-03 11:31 ` [PATCH v2 01/15] x86/cpu: Move intel-family to arch-independent headers Iwona Winiarska
2021-10-04 19:03   ` Borislav Petkov
2021-10-11 19:21     ` Winiarska, Iwona
2021-10-11 19:40       ` Dave Hansen
2021-10-11 20:53         ` Winiarska, Iwona [this message]
2021-10-11 23:12           ` Dave Hansen
2021-10-11 20:06       ` Borislav Petkov
2021-10-11 20:38         ` Winiarska, Iwona
2021-10-11 21:31           ` Borislav Petkov
2021-10-12 23:15             ` Winiarska, Iwona
2021-10-13  6:42               ` Borislav Petkov
2021-08-03 11:31 ` [PATCH v2 02/15] x86/cpu: Extract cpuid helpers to arch-independent Iwona Winiarska
2021-10-04 19:08   ` Borislav Petkov
2021-10-11 19:32     ` Winiarska, Iwona
2021-08-03 11:31 ` [PATCH v2 03/15] dt-bindings: Add generic bindings for PECI Iwona Winiarska
2021-08-11 18:11   ` Rob Herring
2021-08-03 11:31 ` [PATCH v2 04/15] dt-bindings: Add bindings for peci-aspeed Iwona Winiarska
2021-08-11 18:11   ` Rob Herring
2021-08-03 11:31 ` [PATCH v2 05/15] ARM: dts: aspeed: Add PECI controller nodes Iwona Winiarska
2021-08-03 11:31 ` [PATCH v2 06/15] peci: Add core infrastructure Iwona Winiarska
2021-08-25 22:58   ` Dan Williams
2021-08-26 22:40     ` Winiarska, Iwona
2021-08-03 11:31 ` [PATCH v2 07/15] peci: Add peci-aspeed controller driver Iwona Winiarska
2021-08-26  1:35   ` Dan Williams
2021-08-26 23:54     ` Winiarska, Iwona
2021-08-27 16:24       ` Dan Williams
2021-08-29 19:42         ` Winiarska, Iwona
2021-08-03 11:31 ` [PATCH v2 08/15] peci: Add device detection Iwona Winiarska
2021-08-27 19:01   ` Dan Williams
2021-11-15 22:18     ` Winiarska, Iwona
2021-08-03 11:31 ` [PATCH v2 09/15] peci: Add sysfs interface for PECI bus Iwona Winiarska
2021-08-27 19:11   ` Dan Williams
2021-11-15 22:19     ` Winiarska, Iwona
2021-08-03 11:31 ` [PATCH v2 10/15] peci: Add support for PECI device drivers Iwona Winiarska
2021-08-27 21:19   ` Dan Williams
2021-11-15 22:20     ` Winiarska, Iwona
2021-08-03 11:31 ` [PATCH v2 11/15] peci: Add peci-cpu driver Iwona Winiarska
2021-08-03 11:31 ` [PATCH v2 12/15] hwmon: peci: Add cputemp driver Iwona Winiarska
2021-08-03 15:24   ` Guenter Roeck
2021-08-04 10:43     ` Winiarska, Iwona
2021-08-03 11:31 ` [PATCH v2 13/15] hwmon: peci: Add dimmtemp driver Iwona Winiarska
2021-08-03 15:39   ` Guenter Roeck
2021-08-04 10:46     ` Winiarska, Iwona
2021-08-04 17:33       ` Guenter Roeck
2021-08-05 21:48         ` Winiarska, Iwona
2021-08-03 11:31 ` [PATCH v2 14/15] docs: hwmon: Document PECI drivers Iwona Winiarska
2021-08-03 11:31 ` [PATCH v2 15/15] docs: Add PECI documentation Iwona Winiarska
2021-08-05 12:17 ` [PATCH v2 00/15] Introduce PECI subsystem Greg Kroah-Hartman

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