linux-kernel - [RFC v2 0/6] x86/init: use linker table

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Date:	Fri, 19 Feb 2016 06:15:37 -0800
From:	"Luis R. Rodriguez" <mcgrof@...nel.org>
To:	hpa@...or.com, tglx@...utronix.de, mingo@...hat.com, bp@...en8.de
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org, luto@...capital.net,
	boris.ostrovsky@...cle.com, rusty@...tcorp.com.au,
	david.vrabel@...rix.com, konrad.wilk@...cle.com, mcb30@...e.org,
	jgross@...e.com, andriy.shevchenko@...ux.intel.com,
	xen-devel@...ts.xensource.com,
	"Luis R. Rodriguez" <mcgrof@...nel.org>
Subject: [RFC v2 0/6] x86/init: use linker table

This v2 is a re-work of the original linker table work [0],
I've split that original series out into 3:

  * paravirt_enabled() work [1]
  * linker table alone and proof of concepts [2]
  * this series - a new use for linker tables on x86 init

Since the crux of this work is the the linker tables,
I expect most feedback to come through there, but this
also had a few comments, which I've addressed in this
series.

The key here is we drop the direct use of the subarch and
instead make them an explicit requirement consideration
for early x86 boot code. Without this we have no ways but
code review to ensure mismatches will not happen. In
theory code review should catch this, in practice -- its
not happening. This takes a proactive approach to the
problem.

The full set of patches (from all related series) are also
available on linux-next [3] and Linus based tree [4].

[0] http://lkml.kernel.org/r/1450217797-19295-1-git-send-email-mcgrof@do-not-panic.com
[1] http://lkml.kernel.org/r/1455887316-9223-1-git-send-email-mcgrof@kernel.org
[2] http://lkml.kernel.org/r/1455889559-9428-1-git-send-email-mcgrof@kernel.org
[3] https://git.kernel.org/cgit/linux/kernel/git/mcgrof/linux-next.git/log/?h=20160219-linker-table-v2
[4] https://git.kernel.org/cgit/linux/kernel/git/mcgrof/linux.git/log/?h=20160219-linker-table-v2

Luis R. Rodriguez (6):
  x86/boot: add BIT() to boot/bitops.h
  x86/init: use linker tables to simplify x86 init and annotate
    dependencies
  x86/init: move ebda reservations into linker table
  x86/init: use linker table for i386 early setup
  x86/init: user linker table for ce4100 early setup
  x86/init: use linker table for mid early setup

 arch/x86/Kconfig.debug                  |  47 ++++++
 arch/x86/Makefile                       |   1 -
 arch/x86/boot/bitops.h                  |   2 +
 arch/x86/boot/boot.h                    |   2 +-
 arch/x86/include/asm/bios_ebda.h        |   2 -
 arch/x86/include/asm/setup.h            |  12 --
 arch/x86/include/asm/x86_init.h         |   1 +
 arch/x86/include/asm/x86_init_fn.h      | 263 ++++++++++++++++++++++++++++++++
 arch/x86/kernel/Makefile                |   5 +-
 arch/x86/kernel/dbg-tables/Makefile     |  18 +++
 arch/x86/kernel/dbg-tables/alpha.c      |  10 ++
 arch/x86/kernel/dbg-tables/beta.c       |  18 +++
 arch/x86/kernel/dbg-tables/delta.c      |  10 ++
 arch/x86/kernel/dbg-tables/gamma.c      |  18 +++
 arch/x86/kernel/dbg-tables/gamma.h      |   3 +
 arch/x86/kernel/{head.c => ebda.c}      |   6 +-
 arch/x86/kernel/head32.c                |  23 +--
 arch/x86/kernel/head64.c                |  12 +-
 arch/x86/kernel/init.c                  |  55 +++++++
 arch/x86/kernel/sort-init.c             | 114 ++++++++++++++
 arch/x86/platform/ce4100/ce4100.c       |   4 +-
 arch/x86/platform/intel-mid/intel-mid.c |   4 +-
 22 files changed, 584 insertions(+), 46 deletions(-)
 create mode 100644 arch/x86/include/asm/x86_init_fn.h
 create mode 100644 arch/x86/kernel/dbg-tables/Makefile
 create mode 100644 arch/x86/kernel/dbg-tables/alpha.c
 create mode 100644 arch/x86/kernel/dbg-tables/beta.c
 create mode 100644 arch/x86/kernel/dbg-tables/delta.c
 create mode 100644 arch/x86/kernel/dbg-tables/gamma.c
 create mode 100644 arch/x86/kernel/dbg-tables/gamma.h
 rename arch/x86/kernel/{head.c => ebda.c} (94%)
 create mode 100644 arch/x86/kernel/init.c
 create mode 100644 arch/x86/kernel/sort-init.c

-- 
2.7.0